When people discuss breast augmentation, the conversation often centers on the surgeon and the price — but the chosen implant is itself a clinical variable, not a minor technical detail: fill material, surface, shape and brand all affect the aesthetic result, how long it lasts, and its risk profile.
This guide looks in depth at the real differences between the implant types available today, including ones often mentioned only in passing — such as the BIA-ALCL risk linked to certain textured surfaces — so you can walk into the consultation with the right questions.
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Why the implant type matters as much as the surgical technique
Two equally experienced surgeons can achieve very different results starting from the same patient, simply because they proposed different implants in terms of material, shape or size. An implant stays in the body for years, often decades: the initial choice affects not just the immediate look, but also how natural the result stays long-term, how straightforward any future revision will be, and — in rare but documented cases — the clinical risk profile.
This guide complements, not replaces, our breast augmentation guide
If you're looking for a general overview of the procedure (surgical approaches, placement, recovery), see our dedicated breast augmentation guide. Here we focus specifically on the differences between the implant types available.
Cohesive silicone gel or saline solution
| Feature | Cohesive silicone gel | Saline solution |
|---|---|---|
| Feel | Closer to natural breast tissue | Tends to feel firmer and less natural |
| If it ruptures | Cohesive gel tends to stay in place rather than deflating suddenly ("gummy bear" gel) | Deflates quickly and visibly: rupture is almost always immediately obvious |
| Incision size | Pre-filled implant: requires a slightly larger incision | Filled after insertion: allows for smaller incisions |
| Prevalence today | Clearly dominant in modern cosmetic surgery | Increasingly rare outside specific cases |
Modern silicone gel is cohesive: it holds a stable shape even if the outer shell is damaged, unlike the liquid gels used in older generations. This is the main reason it's now the prevailing choice in most countries.
Smooth, textured surfaces and the BIA-ALCL issue
Implants also differ by outer surface type. Smooth implants move more freely within the surgical pocket, with a feel often described as softer; textured surfaces (from micro-texture to more pronounced texturing) reduce the risk of rotation inside the pocket — particularly relevant for anatomical implants, where rotation is visible.
BIA-ALCL: what the data actually shows
In July 2019, the U.S. FDA requested the recall of Allergan's Biocell textured implants and tissue expanders after linking that specific model to a rare lymphoma called BIA-ALCL (breast implant-associated anaplastic large cell lymphoma). Of 573 BIA-ALCL cases identified globally at the time of the recall, about 84% were linked to textured Allergan implants, with an estimated risk roughly six times higher than other manufacturers. The absolute risk remains low and applies specifically to certain heavily textured models, not to textured implants in general — but it's a point worth raising explicitly with your surgeon, asking for the exact brand, model and surface type proposed.
Following the Allergan recall, much of the industry shifted toward smooth or micro-/nano-textured surfaces, associated with a more favorable known risk profile compared to the macro-textures used in the past.
Round or anatomical: how the result changes
- Round: uniform fullness, including the upper pole of the breast (a more pronounced décolletage). Being symmetrical, any rotation inside the pocket doesn't change the visible result.
- Anatomical ("teardrop"): mimics the natural slope of the breast, with more volume at the bottom and less at the top, often perceived as a more natural look. Rotation of the implant in this case can visibly alter the result — which is why it's almost always paired with a textured surface that limits movement.
Neither shape is objectively better
The choice between round and anatomical depends on starting anatomy, existing breast tissue volume, and the desired aesthetic result — not a quality hierarchy between the two shapes.
Profile and projection: low, moderate, high
At the same volume (cc), two implants can have very different base widths and forward projection. A low profile on a wider base distributes volume more evenly across the chest; a high or extra-high profile on a narrower base concentrates volume forward for a more pronounced effect. The right choice depends on the patient's chest width, not just the desired volume: an implant with a base wider than the chest wall tends to look unnatural, regardless of the cc chosen.
The main brands and what actually differs
The breast implant market today is dominated by a relatively small number of international manufacturers, including Mentor (part of Johnson & Johnson), Allergan/Natrelle, Motiva, Polytech and Sientra. Technical differences between the main certified brands mostly come down to construction details — exact gel type, shell thickness and durability, and the range of shapes and profiles available — rather than a clear overall quality hierarchy.
A certified brand matters more than a specific name
Rather than chasing one brand thought to be "the best", it's more useful to verify that the proposed implant comes from a recognized international manufacturer with CE marking or FDA approval, batch traceability and a written warranty — conditions all major brands meet, unlike uncertified generic products, which should always be avoided regardless of any savings offered.
How long an implant lasts and when to replace it
Modern implants don't have a fixed expiration date that applies to every patient: many remain intact for 15-20 years or more. They're not designed to last a lifetime, though, and rupture — especially with cohesive gel, which often shows no obvious symptoms ("silent rupture") — may go unnoticed without imaging (ultrasound or MRI).
- Periodic checks: several international guidelines recommend an imaging check a few years after surgery, and periodically afterward, even without symptoms.
- Warning signs not to ignore: sudden change in shape or volume, persistent pain, or hardening of the breast (possible capsular contracture) should always be evaluated by the surgeon, not just at the scheduled check-up.
How the right choice gets made
- The final choice isn't up to the patient alone, nor the surgeon alone: it comes from matching the patient's expectations against the limits set by her own anatomy (tissue volume, chest width, skin quality).
- A thorough consultation almost always includes a "sizer" trial (sample implant) to visualize a realistic indication of the result before surgery.
- Always ask for the exact brand, model, material, surface and dimensions proposed, in writing — not just the volume in cc.