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Erectile Health

AMS 700 Penile Implant: Specs, Cost and MS Pump Explained

AMS 700 penile implant explained in 7 key facts: LGX vs CX vs CXR, MS and TENACIO pumps, InhibiZone, durability, sizing and surgery cost for 2026 patients.

AMS 700 Penile Implant
Key takeaways
  • The AMS 700 penile implant is a three-piece inflatable penile prosthesis available with LGX, CX and CXR cylinder designs, each intended for different anatomical and mechanical priorities.
  • AMS 700 LGX is designed for length and girth expansion during inflation, but its expansion characteristics do not guarantee cosmetic penile enlargement or a specific gain in centimetres.
  • AMS 700 CXR uses narrower cylinders and may be useful when fibrosis, scarring or previous implant surgery prevents standard cylinders from fitting safely.
  • The traditional AMS 700 MS Pump uses a pump bulb, deflation button and lock-out valve; in 2026 Boston Scientific also markets the newer TENACIO Pump in the United States, so international patients should confirm which configuration they are receiving.
  • InhibiZone uses rifampin and minocycline antibiotic treatment and has published evidence showing lower infection-related revision rates compared with untreated historical AMS implants, but it cannot eliminate infection risk.

The AMS 700 penile implant is a three-piece inflatable penile prosthesis used to treat erectile dysfunction when a man needs a reliable surgical solution. The family includes the AMS 700 LGX, CX and CXR cylinders, combined with an internal pump and fluid reservoir. The models differ mainly in expansion characteristics and the anatomy they are designed to fit.

Choosing between them is more complicated than deciding which model sounds most advanced.

The LGX is designed to provide both length and girth expansion during inflation.

The CX focuses on controlled girth expansion and axial rigidity while offering a broader range of cylinder lengths.

The CXR uses smaller cylinders for men whose corporal anatomy cannot comfortably accept standard-size cylinders, such as some patients with severe fibrosis or previous implant surgery.

All three belong to the same AMS 700 family.

They are not three different grades of quality.

A patient who needs a CXR is not receiving a “worse AMS.”

A patient receiving an LGX is not automatically receiving the “best AMS.”

The correct model is the one that fits the corpora cavernosa and matches the clinical problem.

The pump is another area where current information matters.

For many years, the MS Pump™, or Momentary Squeeze Pump, has been strongly associated with the AMS 700. It uses a scrotal pump bulb for inflation and a deflation button to return fluid to the reservoir.

As of 2026, Boston Scientific also offers the newer TENACIO™ Pump with the AMS 700 in the United States. The company continues to document MS Pump configurations in its international product catalogue, which means a patient should ask which pump is actually being supplied in his country rather than assuming every AMS 700 quotation includes exactly the same configuration.

This guide explains those differences in plain English.

It also covers AMS 700 penile implant cost, InhibiZone antibiotic treatment, cylinder sizing, published durability data and what the device can—and cannot—do for penile length.

What Is the AMS 700 Penile Implant?

The AMS 700 is a family of three-piece inflatable penile prostheses manufactured by Boston Scientific.

The name “AMS” comes from American Medical Systems, the company historically associated with the prosthesis. Boston Scientific acquired the American Medical Systems urology portfolio, and the AMS 700 is now marketed within Boston Scientific's men's-health product range.

The implant contains three functional parts:

  • two inflatable cylinders inside the penis;

  • a pump inside the scrotum;

  • and a fluid reservoir positioned internally in the pelvic or lower abdominal region.

Tubing connects these components.

The entire system is implanted inside the body.

There is no external pump.

There is no battery.

There is no charger.

And there is nothing that needs to be attached before intercourse.

The system works hydraulically.

When the patient repeatedly squeezes the pump, fluid travels from the internal reservoir into the two cylinders.

The cylinders become firm and produce enough axial rigidity for penetrative intercourse.

When the deflation mechanism is activated, fluid leaves the cylinders and returns to the reservoir.

The penis then becomes softer.

This is what distinguishes a three-piece inflatable prosthesis from a malleable penile implant, which remains semi-rigid continuously.

For a broader explanation of implant surgery before comparing specific models, read the penile implant procedure guide.

AMS 700 LGX vs CX vs CXR: The Quick Comparison

The three cylinder designs solve different problems.

Feature

AMS 700 LGX

AMS 700 CX

AMS 700 CXR

Implant type

3-piece inflatable

3-piece inflatable

3-piece inflatable

Primary design emphasis

Length + girth expansion

Controlled girth expansion and rigidity

Narrower dimensions for restricted corpora

Standard pump options

MS Pump / market-dependent newer configurations

MS Pump / market-dependent newer configurations

MS Pump / market-dependent newer configurations

Reservoir

Yes

Yes

Yes

Standard-width cylinder

Yes

Yes

No — narrower design

Often considered when

Length preservation/expansion characteristics are desirable and anatomy allows

Controlled expansion and rigidity are priorities

Fibrosis or smaller corporal dimensions limit standard cylinders

Guaranteed enlargement?

No

No

No

Boston Scientific describes LGX as designed for Length and Girth eXpansion, CX as offering controlled girth expansion, and CXR as providing a smaller-cylinder option for men with scarred or sclerotic corpora.

That table is useful as a starting point.

It should not be used to choose your own implant.

The surgeon has to measure the corpora during surgery and confirm which cylinder system your anatomy can safely accommodate.

AMS 700 LGX: What Makes It Different?

The AMS 700 LGX penile implant attracts more online attention than the other AMS 700 models because its name explicitly refers to:

Length and Girth eXpansion.

Boston Scientific states that its LGX cylinders are designed to optimize both length and girth expansion and that up to 20% cylinder elongation may be possible depending on the patient's anatomy.

The phrase “depending on the patient's anatomy” is critical.

It should not be removed from the claim.

“Up to 20% elongation” does not mean:

  • every patient gains 20% penile length;

  • a 15 cm penis becomes 18 cm;

  • the surgeon can implant an oversized LGX;

  • or LGX is a cosmetic penis-enlargement operation.

The figure describes a device characteristic under appropriate conditions.

The cylinders still sit inside the corpora cavernosa.

The surrounding tissues place anatomical limits on expansion.

A patient with healthy, elastic corpora may behave differently from a man with:

  • severe Peyronie's disease;

  • corporal fibrosis;

  • previous prosthesis infection;

  • previous implant removal;

  • priapism-related scarring;

  • or extensive penile surgery.

The prosthesis cannot safely expand beyond the space the tissues permit.

Does AMS 700 LGX increase penile length?

This question needs a careful answer.

Some published LGX studies have reported preservation or improvement of measured penile dimensions during postoperative follow-up.

For example, prospective and retrospective series have investigated LGX specifically as a strategy to reduce the common complaint of postoperative shortening. Those results are encouraging, but they do not prove that LGX provides predictable cosmetic enlargement to every patient.

A responsible explanation is:

The AMS 700 LGX has length-expansion characteristics that may help optimize or preserve functional penile dimensions in appropriately selected patients, but it cannot guarantee a specific gain in centimetres.

That is very different from saying:

“AMS LGX makes your penis longer.”

Who may be a reasonable LGX candidate?

The decision belongs to the prosthetic surgeon, but LGX may be considered when:

the corpora can accept standard-size cylinders;

there is not severe fibrosis preventing expansion;

length preservation is an important concern;

and the surgeon believes the expansion profile matches the patient's anatomy.

A man with dense corporal fibrosis may require another solution.

In some cases, the CXR may be far more appropriate even though its name does not contain “length expansion.”

An implant that fits safely is better than an expansion device forced into unsuitable anatomy.

AMS 700 CX: What Makes It Different?

The AMS 700 CX is the controlled-expansion member of the family.

Boston Scientific describes the CX cylinders as designed to optimize girth expansion while offering additional length options.

The CX is often discussed in prosthetic urology because of its axial rigidity and controlled expansion characteristics.

Unlike the LGX, its defining feature is not longitudinal cylinder expansion.

That can make CX attractive in situations where controlled rigidity is particularly important.

Does CX increase girth?

The cylinder expands during inflation within the corporal space.

That can provide good penile fullness and rigidity.

But the same warning applies as with LGX.

“Girth expansion” describes how the implanted cylinder behaves.

It does not mean the operation should be marketed as cosmetic penile-girth enhancement.

The tunica albuginea still surrounds the cylinders.

The implant does not safely force the penis beyond its anatomical envelope.

Does CX come in more lengths than LGX?

Boston Scientific's international product information lists MS Pump CX configurations in lengths including 12, 15, 18, 21 and 24 cm, whereas the listed LGX line extends through 21 cm in the standard configurations shown.

These measurements refer to cylinder-system options, not externally visible penile length.

A 24 cm CX implant does not mean the patient will have a 24 cm visible erection.

Part of every cylinder extends proximally inside the body.

This distinction matters because patients sometimes compare prosthesis cylinder numbers as though they were comparing visible penis size.

They are not.

AMS 700 CXR: Why Would Someone Need the Smaller Model?

The AMS 700 CXR is particularly important because it illustrates why there is no universally “best” penile implant.

CXR is designed for men who require shorter and narrower cylinders.

Boston Scientific specifically identifies scarred or sclerotic corpora as an example and states in its current instructions that CXR may also be useful during penile prosthesis reimplantation.

This can occur after:

  • severe corporal fibrosis;

  • previous infected prosthesis;

  • implant explantation;

  • prolonged ischemic priapism;

  • repeated penile surgery;

  • or other causes of dense intracorporal scarring.

Why can't the surgeon just dilate more?

Sometimes the corpora can be dilated sufficiently for standard cylinders.

Sometimes they cannot.

Aggressively forcing larger cylinders into badly scarred tissue can increase the risk of:

  • corporal perforation;

  • urethral injury;

  • erosion;

  • tissue damage;

  • and poor cylinder positioning.

In that situation, a narrower CXR may be the safer and more useful implant.

Does CXR mean a weaker erection?

Not automatically.

Its purpose is still to provide prosthetic rigidity.

The cylinder is simply designed around a smaller corporal space.

The final functional result depends on:

  • correct sizing;

  • positioning;

  • the amount and location of fibrosis;

  • glans support;

  • and overall anatomy.

The mistake is treating CXR as a “low-end AMS.”

It is better understood as a specialized anatomical option.

What Does “AMS 700 MS Penile Implant” Mean?

The secondary search phrase AMS 700 MS penile implant usually refers to an AMS 700 prosthesis combined with the MS Pump™.

MS stands for Momentary Squeeze.

The MS Pump contains:

  • a pump bulb;

  • a deflation button;

  • tubing connecting the pump to both cylinders and the reservoir;

  • and an internal lock-out valve designed to resist auto-inflation.

The pump is positioned inside the scrotum.

The patient feels for it through the skin.

It is separate from the testicles.

How do you inflate the AMS 700 with MS Pump?

After healing and device training, the patient identifies the pump bulb.

He squeezes and releases it repeatedly.

Each effective compression transfers fluid from the reservoir into the cylinders.

The cylinders progressively become firmer.

There is no need to maintain continuous pressure on the bulb.

Instead, the patient performs repeated squeeze-and-release movements.

How do you deflate it?

The patient locates the deflation button on the pump.

Activating the deflation mechanism allows fluid to move out of the cylinders and return to the reservoir.

Boston Scientific describes the MS Pump as having a one-touch button designed to facilitate deflation, along with a lock-out valve intended to resist unwanted auto-inflation.

The exact technique is taught after surgery.

Patients should not rely solely on online instructions because swelling, pump position and hand technique can make the early learning experience different.

What Does Published Research Say About the MS Pump?

The MS Pump is not simply a marketing name.

It has been studied clinically.

A prospective multicentre study led by L. Dean Knoll and colleagues evaluated 69 men implanted with the redesigned AMS 700 Momentary Squeeze system.

At device activation:

  • 96% could easily locate the inflation bulb;

  • 94% could deflate the device with one push of the deflation button;

  • and 67% were trained in six minutes or less.

At six months, 86% were either very satisfied or somewhat satisfied in that study. Auto-inflation occurred in two patients.

Those findings are useful historically.

They should not be interpreted as a guarantee that:

94% of every modern patient population will master deflation immediately,

or that all men will have the same pump experience.

Hand strength, arthritis, neurological function, scrotal anatomy and pump position can all affect usability.

The study nevertheless helps explain why the MS Pump became an important part of the AMS 700 platform.

Important 2026 Update: AMS 700 Now Also Has the TENACIO Pump

This is where a new article needs to be more current than much of the existing content online.

Boston Scientific now markets the AMS 700 with TENACIO™ Pump in the United States.

The TENACIO pump is not a new cylinder family.

The cylinders remain AMS 700 LGX, CX or CXR.

The difference is the pump system.

Boston Scientific describes TENACIO as having:

  • prominent grips intended to help users orient the pump;

  • a high-profile one-press deflation button;

  • dedicated valve functions;

  • an anti-auto-inflation valve;

  • and a design intended to accommodate different squeeze styles and hand strengths.

The manufacturer also reports bench testing in which TENACIO showed a faster refill rate than the MS Pump.

That needs an important qualifier:

the comparison comes from manufacturer bench testing, not a clinical trial demonstrating superior patient outcomes.

Boston Scientific itself states that bench or preclinical findings may not predict clinical performance.

Therefore, Andrology Abroad should not describe TENACIO as “27% better” or “27% faster for patients.”

That would overstate the evidence.

Has TENACIO replaced the MS Pump everywhere?

No.

Current Boston Scientific information differs by market.

The U.S. product information includes TENACIO configurations and also documents AMS 700 configurations associated with the MS Pump.

Boston Scientific's European product pages continue to list the AMS 700 with MS Pump in their ordering information.

For an international patient, the practical question is therefore:

“Which pump and which AMS 700 configuration will actually be implanted in my hospital?”

That should appear on the medical proposal.

What Is InhibiZone on the AMS 700?

InhibiZone™ is Boston Scientific's antibiotic treatment for components of the AMS 700 system.

The product instructions describe it as antibiotic impregnation using:

  • rifampin, also called rifampicin;

  • and minocycline hydrochloride.

The purpose is to reduce the risk of infection-related revision.

This matters because penile prosthesis infection is one of the most serious complications of implant surgery.

Bacteria can adhere to prosthetic material.

Once a clinically significant device infection develops, antibiotics alone may not be sufficient.

The patient may require:

  • implant removal;

  • salvage surgery;

  • or later reimplantation.

Does InhibiZone eliminate infection?

No.

It reduces risk.

It does not make infection impossible.

A major long-term analysis by Culley Carson, John Mulcahy and Manya Harsch reviewed more than 39,000 initial inflatable prosthesis implants.

At up to 7.7 years of follow-up, revision due to infection occurred in 1.1% of antibiotic-impregnated implants versus 2.5% of non-impregnated implants in that dataset.

That is meaningful evidence.

But it should be described correctly.

It does not mean every patient's individual infection risk is exactly 1.1%.

The study looked at large historical cohorts.

Individual risk depends on factors such as:

  • primary versus revision surgery;

  • diabetes;

  • previous infection;

  • surgical complexity;

  • skin and urinary infection;

  • operative technique;

  • and other patient factors.

InhibiZone is one component of infection prevention.

It does not replace sterile surgery, perioperative antibiotics or appropriate patient selection.

What Is the Parylene Coating on AMS 700 Cylinders?

Another less visible design feature is Parylene.

Parylene is used on components of the system to reduce wear.

This becomes relevant because inflatable cylinders repeatedly move, fill and empty over many years.

Mechanical durability matters.

A large manufacturer-database study analyzed more than 55,000 AMS 700 CX and LGX/Ultrex implants.

Researchers found similar estimated seven-year survival for the contemporary Parylene-coated groups:

88.7% for Ultrex/LGX versus 89.5% for CX.

The analysis also found that Parylene-coated devices performed better in survival analysis than earlier non-Parylene configurations.

That study is important for another reason.

It does not show that LGX is mechanically inferior simply because it expands in length as well as girth.

The seven-year survival estimates between the Parylene-coated CX and LGX/Ultrex groups were not significantly different.

How Long Does an AMS 700 Penile Implant Last?

There is no expiry date that applies to every implant.

A penile prosthesis is intended as a long-term device, but no mechanical system should be assumed to function forever.

One of the best-known long-term AMS-specific studies evaluated 397 men with AMS 700 CX/CXM implants.

Mechanical survival was:

97.6% at 3 years

93.2% at 5 years

and

78.2% at 10 years.

Overall prosthesis survival—which also considers non-mechanical reasons for failure—was 95.0%, 91.0% and 75.5% at those same time points.

These are impressive long-term results.

They are also historical data from implants placed between 1991 and 2009.

They should not be turned into a guarantee for a device implanted in 2026.

Implant engineering has evolved.

Surgical techniques have changed.

Modern infection prevention has changed.

And an individual patient may behave very differently from an average survival curve.

A broader contemporary analysis of inflatable penile prostheses has estimated approximately 20 years as the median device survival time across the literature, with newer studies showing better five-year survival than older studies.

A 2026 survival analysis of three-piece inflatable prostheses similarly reported strong intermediate-term survival but declining survival over longer follow-up, reinforcing the central message: these are durable devices, not lifetime guarantees.

An Expert View on AMS 700 Durability

The long-term AMS 700 CX/CXM study was led by urologist Dong Suk Kim and colleagues at Yonsei University College of Medicine.

After examining nearly two decades of implant experience, the authors concluded:

“The AMS 700CX/CXM could be accepted and applied in more patients as a reliable treatment alternative of ED.”

That conclusion came from a study in which mechanical survival remained above 93% at five years.

The important word is reliable.

It does not mean indestructible.

A younger patient receiving an inflatable implant should understand that future revision may eventually be necessary.

What Can Fail Mechanically?

A three-piece prosthesis is a hydraulic device.

Possible long-term mechanical problems can involve:

  • cylinders;

  • pump;

  • tubing;

  • connectors;

  • or reservoir.

A fluid leak may prevent full inflation.

A pump malfunction may make inflation or deflation difficult.

Tubing damage can disrupt fluid movement.

A cylinder can eventually fail.

Mechanical failure usually does not mean the patient's health is suddenly in danger.

But it often means another operation is needed to repair or replace the prosthesis.

That is why the patient's financial planning should consider not only the first operation but also the possibility of revision years later.

Our penile implant procedure guide explains the overall treatment pathway, while the site's surgery-cost page covers the current financial structure in Türkiye.

AMS 700 Penile Implant Cost: How Much Does It Cost?

There is no meaningful worldwide retail price for an AMS 700 penile implant.

That is one of the most important answers for this keyword.

A penile prosthesis is not normally bought by the patient as a boxed consumer product.

The device is supplied within a surgical pathway.

The final amount can include:

  • the AMS 700 prosthesis;

  • surgeon;

  • anaesthetist;

  • operating theatre;

  • hospital;

  • medical tests;

  • medications;

  • hospital stay;

  • postoperative reviews;

  • and, for medical travellers, hotel and transport.

Therefore:

AMS 700 penile implant cost ≠ AMS 700 surgery cost.

A hospital may acquire the device at one price and charge the patient according to a completely different bundled structure.

National healthcare economics also matter.

An AMS 700 procedure performed privately in the United States may have a very different total price from surgery performed in Türkiye even when the implant family is similar.

That difference can come from:

  • facility costs;

  • labour;

  • insurer negotiations;

  • taxes;

  • distribution;

  • hospital margins;

  • surgeon fees;

  • and medical-travel package structure.

For current local package information, use Andrology Abroad's penile implant surgery cost in Turkey page rather than relying on an old price quoted in a forum or blog post.

Does AMS 700 LGX Cost More Than CX or CXR?

Not necessarily in a predictable way for the patient.

Manufacturer procurement cost can vary by:

  • model;

  • market;

  • distribution agreement;

  • hospital purchasing arrangement;

  • and country.

But a clinic's final package can also absorb those differences.

A patient may therefore receive the same total package price for more than one AMS 700 model.

Another provider may charge differently by device.

There is no universal international rule.

What matters is that the quote should identify:

AMS 700 + exact cylinder model + pump configuration + hospital + surgeon + inclusions.

“American implant” is not enough.

“Boston Scientific implant” is not enough.

Even “AMS 700” does not fully tell you what is being implanted.

You should know whether the plan is:

LGX, CX or CXR.

And in 2026, it is also reasonable to ask:

MS Pump or TENACIO Pump?

What Should an AMS 700 Quote Say?

A high-quality proposal should identify the device precisely.

For example:

Boston Scientific AMS 700 LGX three-piece inflatable penile prosthesis with [specified pump configuration].

That is much more useful than:

Premium American three-piece implant.

The written proposal should also state whether the quoted figure includes:

  • prosthesis;

  • surgeon fee;

  • anaesthesia;

  • operating theatre;

  • hospital stay;

  • required laboratory testing;

  • medicines;

  • follow-up;

  • and medical-travel services.

Patients comparing treatment abroad can also review Andrology Abroad's clinic directory rather than selecting an implant without knowing where the operation will take place.

What Is the AMS 700 Reservoir?

The AMS 700 is a three-piece system, so it needs a fluid reservoir.

This reservoir stores fluid while the implant is deflated.

When the patient operates the pump, fluid moves from the reservoir into the two cylinders.

When the device is deflated, fluid moves back.

Boston Scientific lists reservoir configurations including:

  • spherical reservoirs;

  • and the AMS Conceal™ low-profile reservoir in applicable markets.

The reservoir is internal.

A patient should not normally see or manipulate it.

Where is it placed?

Traditional placement is within the pelvic region behind the pubic bone.

Alternative reservoir positions may be used in selected patients.

This is especially relevant after:

  • radical prostatectomy;

  • bladder surgery;

  • hernia repair;

  • or other operations that change pelvic anatomy.

Previous prostate surgery does not automatically prevent the use of an AMS 700.

It simply makes reservoir planning an important part of the surgical assessment.

What Sizes Does the AMS 700 Come In?

The answer depends on the cylinder model.

Boston Scientific's international MS Pump product information lists LGX cylinders in standard configurations including:

12 cm, 15 cm, 18 cm and 21 cm.

CX options extend through 24 cm.

CXR uses shorter and narrower options appropriate for more restricted anatomy, with specific lengths varying by configuration and market.

Rear-tip extenders are also available.

But these figures need context.

A 21 cm implant does not equal a 21 cm penis.

Part of each cylinder runs backward into the corporal root within the body.

Surgeons choose size by measuring the internal corpora during surgery.

You cannot accurately choose your AMS cylinder length from:

  • an external photograph;

  • your height;

  • your current erection length;

  • or the size another patient received.

Does AMS 700 LGX Guarantee a Bigger Penis?

No.

This misconception deserves its own section because it affects patient satisfaction.

The AMS 700 LGX has genuine length-expansion characteristics.

Boston Scientific states that the cylinder can achieve up to 20% elongation depending on anatomy.

But device expansion and cosmetic penis enlargement are not the same thing.

The tunica albuginea surrounds the implanted cylinders.

Fibrosis may restrict expansion.

Previous surgery may restrict expansion.

Penile shortening may already have occurred before implantation.

The surgeon also cannot safely place an implant longer than the measured corporal space.

Published LGX studies suggest the design may help preserve or optimize postoperative length in appropriate patients. They do not establish a predictable guaranteed centimetre gain for every man.

The best preoperative question is therefore not:

“How many centimetres will LGX give me?”

It is:

“What are my current stretched and corporal measurements, and which cylinder design best fits my anatomy?”

Does AMS 700 Affect Sensation?

The implant is designed to restore penile rigidity.

It does not replace the sensory nerves in the skin of the penis.

Therefore, a man with normal penile sensation before uncomplicated implantation would generally expect to retain sensation afterward.

However, the disease that caused erectile dysfunction may independently affect sensation.

Examples include:

  • diabetes;

  • spinal cord injury;

  • peripheral neuropathy;

  • pelvic cancer treatment;

  • and previous surgery.

The prosthesis cannot restore a sensory nerve pathway that was already damaged.

Can You Orgasm With an AMS 700 Implant?

For many men, yes.

An erection and an orgasm are related but distinct physiological functions.

The AMS 700 creates mechanical shaft rigidity.

It does not mechanically create orgasm.

If a man could orgasm before surgery, implant placement is not intended to remove that ability.

However, orgasm can already be altered by:

  • radical prostatectomy;

  • neurological disease;

  • medications;

  • low libido;

  • depression;

  • chronic illness;

  • or other conditions.

The implant treats the erection problem.

It does not treat every aspect of sexual function.

Can You Ejaculate With AMS 700?

The implant itself does not normally block the urethra.

If a man had normal ejaculation before surgery and has no separate ejaculatory disorder, ejaculation can usually continue.

But many implant patients have undergone radical prostatectomy.

After prostate removal, the man generally no longer produces a normal semen-containing ejaculation.

An AMS 700 cannot restore that.

The distinction matters because men sometimes assume:

reliable erection = restoration of all pre-surgery sexual functions.

That is not always true.

How Natural Does the AMS 700 Feel?

“Natural” is subjective.

The AMS 700 is still a mechanical prosthesis.

It does not recreate natural erectile blood flow.

However, a three-piece device can provide a major practical advantage over a malleable prosthesis:

it can transition between a softer resting state and a firm inflated state.

Boston Scientific describes the cylinder construction as designed to maintain a symmetrical appearance in both inflated and deflated states.

The glans remains separate from the cylinders.

It may still engorge naturally during arousal.

If glans blood flow is poor, the shaft can become very firm while the glans remains softer.

This can happen with any inflatable penile prosthesis and does not necessarily indicate mechanical failure.

How Hard Does the AMS 700 Get?

The aim of any inflatable penile prosthesis is sufficient axial rigidity for penetration.

The exact feel depends on:

  • cylinder model;

  • corporal anatomy;

  • degree of inflation;

  • fibrosis;

  • glans support;

  • and implant positioning.

Patients generally do not need to compare the device to an abstract measure of maximum hardness.

The clinically useful question is whether it provides comfortable and reliable penetrative rigidity.

Overinflating beyond what is comfortable is not a competition.

Once healed, the patient learns how much inflation works for him.

How Long Does the Erection Last?

As long as the implant remains inflated.

The AMS 700 does not depend on continued sexual stimulation to maintain the erection.

Orgasm does not automatically make it soft.

Ejaculation does not automatically make it soft.

The patient deflates the device when he chooses.

This can be one of the major practical benefits for men who previously struggled to maintain natural erections.

Who Is Usually a Candidate for AMS 700?

The AMS 700 is one option within the broader penile-prosthesis pathway.

Penile implant surgery may be considered when erectile dysfunction:

  • does not respond adequately to less invasive treatment;

  • cannot be treated safely with appropriate medication;

  • makes injections or vacuum devices unacceptable or ineffective;

  • follows prostate or pelvic surgery;

  • coexists with severe Peyronie's disease;

  • or has reached the point where an informed patient prefers a definitive surgical solution.

The device itself should come after the decision that penile prosthesis surgery is appropriate.

A patient should not decide:

“I want AMS LGX.”

and then search for a diagnosis that justifies it.

The correct order is:

diagnosis → treatment decision → anatomy → implant selection.

Who Might Not Be a Good Candidate Right Now?

Elective prosthesis surgery may need to be delayed or reconsidered when there is:

  • active urinary infection;

  • active skin infection;

  • uncontrolled medical risk;

  • unrealistic expectations;

  • uncertainty about whether severe ED is actually present;

  • or inability to understand and use the planned device.

Hand function deserves particular attention.

The patient needs to operate a scrotal pump.

A man with severe:

  • arthritis;

  • neurological disease;

  • hand weakness;

  • or impaired dexterity

may need to demonstrate that he can manipulate an inflatable pump.

If he cannot, a malleable prosthesis may sometimes be a more functional choice.

Does Diabetes Prevent AMS 700 Surgery?

No.

Many men receiving penile implants have diabetes.

Diabetes is also an important cause of severe erectile dysfunction.

But diabetes can increase surgical complexity and infection concern, particularly when glycaemic control is poor or other complications are present.

This is one reason infection-reduction strategies matter.

It is also why a patient's medical condition should be reviewed before the implant brand becomes the centre of discussion.

A successful AMS 700 procedure involves more than the device itself.

Can AMS 700 Be Used With Peyronie's Disease?

Yes, in selected men with both significant erectile dysfunction and Peyronie's disease.

Inflating the cylinders can itself correct some penile curvature.

If clinically important curvature remains, the surgeon may perform additional techniques such as:

  • modelling;

  • plication;

  • plaque incision;

  • or grafting in selected severe cases.

Device choice may then be influenced by the penile deformity and tissue characteristics.

The surgeon may prefer a particular cylinder based on the reconstructive problem.

This is another situation in which the word “best” becomes misleading.

The best prosthesis for routine vascular ED may not be the exact prosthesis preferred for severe fibrosis and deformity.

Is AMS 700 CXR Mainly for Revision Surgery?

No, although revision is one important use.

Boston Scientific states that CXR can be suitable when anatomy requires shorter or narrower cylinders and may also be useful for reimplantation.

A first-time patient with severe fibrosis might therefore receive CXR.

A revision patient might also receive it.

The clinical indication comes from the available corporal dimensions rather than whether the operation is officially labelled “primary” or “revision.”

AMS 700 vs a Malleable Implant

The comparison is fundamentally about mechanics.

The AMS 700:

  • inflates;

  • deflates;

  • uses a pump;

  • has a reservoir;

  • provides a softer resting state;

  • and has more mechanical components.

A malleable prosthesis:

  • does not inflate;

  • has no hydraulic pump;

  • has no reservoir;

  • remains semi-rigid;

  • and is mechanically simpler.

For many patients, the AMS 700 offers better concealment and a more natural transition between resting and erect states.

For a man who cannot operate a pump, those advantages may be irrelevant.

Device sophistication is useful only when the patient can use it.

AMS 700 vs Other 3-Piece Penile Implants

The AMS 700 is not the only three-piece inflatable prosthesis.

Other manufacturers produce established devices.

The choice may involve differences in:

  • cylinder design;

  • coatings;

  • pump mechanics;

  • reservoir options;

  • available dimensions;

  • surgeon familiarity;

  • and regional availability.

No patient should assume that a recognizable brand name alone guarantees a better surgical result.

The device still needs to be:

  • selected correctly;

  • sized correctly;

  • implanted correctly;

  • and followed correctly.

Day 11 of the editorial programme will make the direct comparison between AMS 700 and the Coloplast Titan rather than trying to force that entire question into this device-specific article.

Penile prosthesis implantation requires intraoperative judgment.

The surgeon must decide:

  • where to make the incision;

  • how to dilate each corpus;

  • whether fibrosis is present;

  • how long each corporal space measures;

  • which cylinder fits;

  • how much rear-tip extension is appropriate;

  • where to place the reservoir;

  • how to position the pump;

  • whether Peyronie's curvature requires correction;

  • and how to respond to unexpected anatomy.

Boston Scientific manufactures the prosthesis.

It does not perform those decisions.

That is why patients should evaluate the surgeon as carefully as the device.

You can review Andrology Abroad's surgeon directory when comparing physicians rather than selecting a treatment solely by implant brand.

How Should You Compare AMS 700 Offers Abroad?

Start by confirming that the offers are genuinely comparable.

A useful comparison should include:

Question

Quote A

Quote B

Manufacturer

Boston Scientific?

Product family

AMS 700?

Cylinder

LGX / CX / CXR

Pump

MS / TENACIO / other documented configuration

InhibiZone

Included or not

Surgeon

Named

Hospital

Named

Anaesthesia

Included

Implant cost

Included

Hospital stay

Included

Tests

Included

Follow-up

Included

Warranty

Explained

Revision policy

Explained

Final expected price

This makes the quotation far more useful than comparing two round numbers.

A provider quoting:

“AMS 700 — €X”

without explaining the model is leaving out important information.

Does the Manufacturer Warranty Mean Free Revision Surgery?

No assumption should be made.

A device warranty and the cost of revision surgery are separate issues unless the written terms explicitly say otherwise.

Even when an eligible prosthesis component is replaced by the manufacturer, another operation can still involve:

  • hospital;

  • surgeon;

  • anaesthesia;

  • operating theatre;

  • tests;

  • medication;

  • travel;

  • and accommodation.

Patients should ask specifically:

What does the manufacturer cover?

and

What would I still personally pay if revision is required?

This is particularly important for international medical travellers.

What Documentation Should You Receive After AMS 700 Surgery?

Keep a record of the implanted device.

Useful information includes:

  • manufacturer;

  • exact model;

  • cylinder configuration;

  • pump type;

  • surgery date;

  • surgeon;

  • hospital;

  • device identification details provided by the hospital or manufacturer;

  • and warranty information.

That information can matter years later.

If you require imaging, troubleshooting or revision surgery in another country, the new urologist should not have to guess what is inside your body.

7 Things to Confirm Before Choosing an AMS 700 Penile Implant

1. Confirm that an implant is actually the right treatment

Do not start with brand selection before establishing that severe erectile dysfunction justifies prosthesis surgery.

2. Confirm the cylinder model

Ask whether the plan is:

LGX, CX or CXR.

Each has a different design purpose.

3. Confirm the pump

In 2026, do not assume “AMS 700” automatically means one pump everywhere.

Ask whether the planned configuration uses the MS Pump or TENACIO Pump, where available.

4. Confirm infection-protection configuration

Ask whether the quoted model includes InhibiZone in the market where surgery is being performed.

5. Confirm who is performing the surgery

Brand recognition does not replace surgeon skill.

6. Confirm the hospital and complete cost

The prosthesis is only one part of a surgical episode.

7. Confirm realistic expectations

Especially regarding:

  • penile length;

  • glans firmness;

  • pump use;

  • recovery;

  • and future revision.

These seven questions do more to protect a patient than simply asking:

“Is AMS 700 the best implant?”

AMS 700 Penile Implant: The Bottom Line

The AMS 700 penile implant is a well-established three-piece inflatable penile prosthesis family with three major cylinder options:

LGX, CX and CXR.

The LGX is designed for both length and girth expansion during inflation, with Boston Scientific describing up to 20% cylinder elongation as possible depending on anatomy. That is a device characteristic, not a guaranteed penile-length gain.

The CX provides controlled girth expansion and established axial rigidity, with a broad range of cylinder lengths.

The CXR uses narrower dimensions and can be particularly useful when fibrosis, scarring or previous surgery limits the corporal space available for a standard cylinder.

The long-established MS Pump, meaning Momentary Squeeze Pump, uses a scrotal pump bulb and deflation button and includes a lock-out mechanism intended to resist auto-inflation. Published clinical research found that most participants in an early prospective study could operate the pump successfully after training.

But a 2026 article also needs to recognize the newer TENACIO Pump. Boston Scientific now markets AMS 700 configurations with TENACIO in the United States, while MS Pump configurations remain documented internationally. Patients travelling for surgery should therefore ask which exact pump and cylinder configuration is included in their quote.

The InhibiZone antibiotic treatment is another important feature. Long-term historical data showed infection-related revision of 1.1% among antibiotic-impregnated implants compared with 2.5% among non-impregnated devices in a large dataset. It reduces risk; it does not eliminate infection.

Long-term mechanical evidence is also strong.

One AMS 700 CX/CXM study reported mechanical survival of 93.2% at five years and 78.2% at ten years, while a very large CX-versus-LGX/Ultrex analysis found similar seven-year survival between contemporary Parylene-coated cylinder designs.

Those figures should be used for counselling, not guarantees.

No penile implant can be promised to last for life.

And none of the AMS 700 models should be selected because its name sounds better.

The correct order remains:

Is a penile implant appropriate?

What does my anatomy allow?

Which cylinder design best matches that anatomy?

Can I operate the pump comfortably?

Who will perform the surgery?

What exactly does the quotation include?

If you are at the beginning of that process, review the main penile implant procedure.

For current self-pay planning, use the dedicated penile implant surgery cost in Turkey page.

You can also compare andrology surgeons and hospitals and clinics before making a decision.

If you want your medical history and implant options assessed individually, contact Andrology Abroad.

The useful question is not:

“Which AMS 700 is the biggest?”

It is:

“Which AMS 700 configuration fits my anatomy and priorities best—and why?”

That is what good prosthetic surgery should answer.

Common questions

What is the AMS 700 penile implant?
The AMS 700 penile implant is a three-piece inflatable penile prosthesis made by Boston Scientific for men with erectile dysfunction. It contains two cylinders placed inside the corpora cavernosa, a pump inside the scrotum and an internal fluid reservoir. The main cylinder options are AMS 700 LGX, CX and CXR.
What is the difference between AMS 700 LGX, CX and CXR?
LGX is designed for length and girth expansion during inflation. CX uses controlled expansion focused on girth and rigidity. CXR uses narrower and shorter cylinder options for men with restricted corporal anatomy, such as severe fibrosis or scarring. The appropriate model depends on measurements and anatomy rather than personal preference alone.
Does the AMS 700 LGX make your penis bigger?
AMS 700 LGX has length- and girth-expansion characteristics, and Boston Scientific states that up to 20% cylinder elongation may be possible depending on anatomy. This does not guarantee a 20% increase in visible penile length. The cylinders remain limited by the patient's corporal dimensions, fibrosis and tissue elasticity.
What is the AMS 700 MS penile implant?
“AMS 700 MS” usually refers to an AMS 700 inflatable penile prosthesis using the Momentary Squeeze, or MS, Pump. The pump sits inside the scrotum and has a bulb for moving fluid into the cylinders, a deflation button and an internal lock-out valve designed to resist unwanted auto-inflation.
What is the difference between the MS Pump and TENACIO Pump?
Both pumps operate the AMS 700 hydraulic system, but TENACIO is a newer Boston Scientific design with more prominent grips, a redesigned one-press deflation button and revised valve architecture. As of 2026, configurations differ by market, so patients should confirm which pump is included rather than assuming every AMS 700 is identical.
How long does an AMS 700 penile implant last?
There is no guaranteed lifespan. One long-term AMS 700 CX/CXM study reported mechanical survival of 93.2% at five years and 78.2% at ten years. Modern device designs continue to evolve, so historical survival figures are useful for counselling but cannot predict exactly how long an individual implant will function.
How much does an AMS 700 penile implant cost?
There is no universal AMS 700 retail price. The patient's total cost usually combines the prosthesis, surgeon, hospital, anaesthesia, operating theatre, tests and follow-up. Prices also vary widely by country and healthcare system. Patients should compare itemised surgical packages that name the exact AMS 700 model rather than comparing device prices alone.
What is InhibiZone on an AMS 700 implant?
InhibiZone is an antibiotic treatment using rifampin and minocycline on AMS 700 components. A large historical study found infection-related revision in 1.1% of antibiotic-impregnated implants versus 2.5% of untreated implants. It reduces infection risk but does not make prosthesis infection impossible.
Is AMS 700 CXR only for men with a small penis?
No. CXR is primarily an anatomical solution for narrower or restricted corporal spaces. Severe fibrosis, scarring or previous prosthesis surgery may prevent standard cylinders from fitting safely even in a man who did not previously consider his penis small. The surgeon selects CXR according to internal corporal measurements.
Which AMS 700 penile implant is best?
There is no universally best AMS 700 model. LGX, CX and CXR solve different anatomical problems. The appropriate implant depends on corporal measurements, fibrosis, Peyronie's disease, previous surgery, penile-length expectations and surgeon experience. A correctly fitted model is more important than choosing the model with the most attractive marketing feature.

Sources

  1. Boston Scientific — AMS 700™ Inflatable Penile Prosthesis: Product Details and Ordering Information
  2. Boston Scientific — AMS 700™ with MS Pump™ Instructions for Use
  3. Boston Scientific — AMS 700™ with TENACIO™ Pump
  4. Knoll LD, Henry G, Culkin D, et al. Physician and patient satisfaction with the new AMS 700 momentary squeeze inflatable penile prosthesis. Journal of Sexual Medicine. 2009.
  5. Kim DS, Yang KM, Chung HJ, et al. AMS 700CX/CXM inflatable penile prosthesis has high mechanical reliability at long-term follow-up. Journal of Sexual Medicine. 2010.
  6. Enemchukwu EA, Kaufman MR, Whittam BM, Milam DF. Comparative revision rates of inflatable penile prostheses using woven Dacron fabric cylinders. Journal of Urology. 2013.
  7. Carson CC III, Mulcahy JJ, Harsch MR. Long-term infection outcomes after original antibiotic impregnated inflatable penile prosthesis implants. Journal of Urology. 2011.
  8. Kim KS, et al. Experience with AMS 700 LGX penile prostheses for preserving penile length. World Journal of Men's Health. 2019.
Written and reviewed by clinicians

Last reviewed 13 September 2026. We re-review this article by 28 March 2027. This article is for information and is not a substitute for advice from a doctor who knows your history.