Saline vs Silicone Implants: Pros, Cons and How Each Feels

The difference between silicone vs saline implants is smaller than most people expect. Both have a silicone outer shell; only the filling differs (1). Silicone gel usually looks and feels more like natural breast tissue, while saline is more likely to ripple and goes down visibly if it leaks (2, 3).

Several of the questions people worry about most, such as the rare implant-related lymphoma, scar tissue hardening and how long implants last, depend more on the shell's surface and on time than on the filling. This guide compares the two, then covers the risks that apply to both.

Silicone vs saline implants at a glance

The US age limits are FDA approval rules. The UK has no fixed legal age for implants, but doctors must only treat under-18s when it is in their best interests (8).

What is inside each implant

Saline implants have a silicone shell filled with sterile salt water. Most are filled during the operation, and some come pre-filled (1). "Structured" saline implants have an inner frame designed to make them feel more natural (9). Silicone implants come pre-filled with silicone gel, which ranges from softer gels to firm "form-stable" gels that hold their shape (9, 10).

Because both types have a silicone shell, no breast implant is silicone-free (1).

Look and feel: why your body matters as much as the filling

The NHS describes silicone implants as less likely to wrinkle and more natural to the touch, and saline implants as more likely to fold, rupture or go down over time (2). UK plastic surgeons' patient information says the same: saline usually feels less natural and has a greater risk of rippling (3).

Rippling shows most when the implant is covered by only a thin layer of tissue (2). In one practice's 15-year review of 812 augmentation patients, 7.1% had rippling, and it was significantly more common in underweight women who had saline implants placed above the chest muscle (11). So your build, the implant's size and whether it sits above or below the muscle all shape the result, and are worth discussing alongside the filling.

Gummy bear (form-stable) implants

"Gummy bear" is the popular name for silicone implants filled with a thicker, more cohesive gel. They are firmer than standard silicone implants and keep their shape even if the shell breaks (9). They need a slightly longer cut to place (9, 10).

Many come in a teardrop shape. These usually have a textured surface to stop them turning inside the breast (10), because a rotated implant changes the shape of the breast (9). In one surgeon's series of 2,252 shaped implants, 1.8% rotated (12). The textured surface is also what links them to BIA-ALCL: the 2019 recall of Allergan's textured implants included its shaped Natrelle 410 range (13). Form-stable implants are still silicone implants, so the same scan advice applies (5).

When an implant fails: deflation vs silent rupture

If a saline implant leaks, the salt water escapes into the body, either straight away or over several days, and the breast visibly loses size (4). The body absorbs the salt water safely (2), but the empty shell still needs surgery to remove or replace it.

Most silicone ruptures cause no symptoms, which is why they are called silent (4). The gel may stay inside the scar tissue around the implant or escape into the surrounding pocket (4, 9), and occasionally it moves further (4). The NHS advises that a ruptured implant should be removed as soon as possible (2).

Checking silicone implants for rupture

In the US, the FDA recommends that people with silicone implants and no symptoms have a first ultrasound or MRI 5 to 6 years after surgery, then every 2 to 3 years. An MRI is recommended if you have symptoms or an unclear ultrasound result (5). Some websites still quote an older schedule of MRI scans from 3 years.

The UK has no routine scan schedule. The NHS says you may need an ultrasound or MRI if a rupture is suspected (2), and NHS breast screening does not check whether implants are intact (14).

How long implants last

Neither type is a lifetime device. The FDA warns that the longer you have implants, the more likely complications become, some of which need more surgery (5), and the NHS says implants are likely to need replacing at some point (2). FDA data suggest that as many as 1 in 5 women who have silicone implants for cosmetic reasons need them removed within 10 years (15).

Ten-year studies funded by manufacturers give an idea of the numbers, although they measured rupture in different ways, so the figures cannot be compared directly:

• Silicone: rupture in 8.6% (16), 9.3% (17) and 24.2% (18) of patients after 10 years.
• Saline: 90% of implants were still intact at 10 years (19).

The MHRA says revision surgery will be needed at some point (20), and the NHS says some women may need further surgery after about 10 years (2). Our breast implants page sets out what one 10-year study found about removal and rupture.

Capsular contracture: hardening around the implant

The body forms a layer of scar tissue around every implant. When it tightens, the breast can feel firm, look misshapen or hurt; this is capsular contracture, and it affected 12% to 19% of patients by 10 years in two silicone studies (17, 18).

A 2025 review of studies found no significant difference between saline and silicone (21). What did matter:

• Textured implants had a lower risk than smooth ones (21, 22).
• Implants placed under the chest muscle had a lower risk than those placed above it (21).

That creates a trade-off: textured surfaces lower the risk of contracture but carry the higher risk of BIA-ALCL, described below.

Safety questions that apply to both types

BIA-ALCL

Breast implant-associated anaplastic large cell lymphoma (BIA-ALCL) is a rare cancer of the immune system, not a breast cancer. The risk is higher with textured implants, and the type of filling does not appear to be a risk factor (6). Of 1,380 cases reported to the FDA by June 2024, 64 people had died, and 26% of the cases involved saline implants (23).

In the UK, the reporting rate is about 1 case for every 12,187 implants sold (24). It usually appears years after surgery as swelling, a lump or pain in the breast (6, 24). The FDA and MHRA do not advise removing implants that cause no symptoms (13, 24); see a doctor promptly about new swelling or a lump.

A different, very rare cancer, squamous cell carcinoma, has also been found in the scar tissue around implants. The FDA knew of 19 published cases in 2023, with both saline and silicone and both smooth and textured implants (25).

Breast implant illness

Some people with implants report symptoms such as tiredness, memory problems, rashes, "brain fog" and joint pain. The FDA says these may be associated with implants but are poorly understood (4), and that some people report their symptoms going away after the implants are removed (5). This applies to both saline and silicone.

Autoimmune disease and cancer

The FDA found no apparent link between silicone gel implants and connective tissue disease or breast cancer (15). A later systematic review concluded that the evidence on long-term health effects remains inconclusive (26).

US warnings and consent

Since 2021, US breast implants carry a boxed warning, and surgeons must go through a risk checklist with you and sign it before surgery (5, 27). Elsewhere, ask your surgeon to go through the same points.

Satisfaction with each type

Satisfaction is high with both. In a large US study of 14,514 women, funded by an implant manufacturer, satisfaction with the breasts rose from 31.5 to 88.4 out of 100 one year after surgery with silicone implants. Saline scored slightly lower, by about 2 points on the 100-point scale, and the authors said it is unclear whether a difference that small matters in practice (28).

Mammograms and breast screening with implants

Keep having breast screening with either type. Implants can hide some breast tissue, so radiographers take extra "displacement" views that move the implant out of the way, and there is no evidence that mammograms cause implants to rupture (14). Tell the person doing your mammogram that you have implants (2).

Which type is used, and keeping your implant details

Silicone is far more common. In 2019, 85% of US implants were silicone and 15% saline (7), and silicone is the most common type used in the UK (2). If you would prefer saline, ask early whether the clinic you are considering offers it.

Whichever type you choose, ask for your implant card. In the EU, patients must receive a card showing the implant's name, type and serial or batch number (29), and US patients get a device card too (5). The UK's implant registry records operations done in England, Scotland and Northern Ireland (30), so if you have surgery abroad, keep your card and give a copy to your GP.

Questions to take to your consultation

• Which filling suits my tissue, and why?
• Smooth or textured surface, and what does that mean for my risks?
• Round or teardrop shape?
• Above or below the chest muscle?
• Which make and model, and will I get an implant card?
• What scans will I need later, and who arranges them?
• Who looks after me if there is a problem once I am home?

Frequently asked questions

Does anyone still get saline implants?

Yes, but far fewer people than choose silicone: 15% of US implants in 2019 (7), and silicone is the most common type in the UK (2). If you want saline, ask whether your clinic offers it.

Which lasts longer, silicone or saline implants?

Neither lasts a lifetime (5). Ten-year studies found most implants of both types intact, but they measured failure differently, so they cannot be compared directly (17, 19).

What are the least toxic breast implants?

No implant is silicone-free, because saline implants have a silicone shell (1). Reviews have not confirmed a link to autoimmune disease (26). Smooth surfaces carry a lower BIA-ALCL risk than textured ones (6).

Do saline implants ripple more than silicone?

Yes, they are more likely to ripple, especially in slim women or when placed above the chest muscle (3, 11).

Do saline implants carry a BIA-ALCL risk?

Yes, if they have a textured surface. The filling does not appear to be a risk factor (6), and 26% of cases reported to the FDA involved saline implants (23).

Can breast implants burst on a plane?

No. The NHS says it is safe to fly with breast implants (2).

Can I have mammograms with implants?

Yes. Tell the radiographer about your implants so they can take extra views, because implants can hide some breast tissue (14).

Next steps

If you are deciding between silicone and saline, take the questions above to your consultation, and ask for the make, model and implant card in writing before surgery. Istanbul European Clinic does not provide surgery; every clinical decision is made by your independent partner surgeon.