In short. The two fill classes and two shell surfaces, what each is like to live with, capsular contracture, rupture, the implant-associated lymphoma, and follow-up.
Key points
- Patients often describe what they were offered as one thing.
- It is two independent choices: what is inside the implant and what its surface is like.
- A consultation should name both and say why that combination suits your tissue, because the same fill in a different shell is a different set of terms to live with.
An implant is the only part of this comparison that is manufactured. Everything else in the decision is the patient’s own tissue, which is why the classes of implant are worth understanding before a plan is fixed rather than after.
Two fill classes
A silicone gel-filled implant contains a cohesive gel that holds together rather than running, and it feels closer to breast tissue than the alternative. A saline-filled implant contains sterile salt water, placed empty and filled through a valve during the operation; it needs a slightly longer incision for the same volume and it feels firmer. The trade is one of feel against behaviour: a saline implant that ruptures deflates visibly, whereas a gel-filled implant that ruptures may leak silently and be found only on imaging.
Two shell surfaces
The shell is either smooth or textured, and the surface is a separate choice from the fill. A textured surface was introduced to reduce the risk of the capsule contracting, and it is also the surface associated with the rare lymphoma described below. A smooth surface carries a different pattern of capsule formation. Which surface is offered depends on the implant, the plane it sits in and the shape being used, and the reasons should be explained rather than assumed.
Fill and shell are two decisions, not one
Patients often describe what they were offered as one thing. It is two independent choices: what is inside the implant and what its surface is like. A consultation should name both and say why that combination suits your tissue, because the same fill in a different shell is a different set of terms to live with.
What living with an implant involves
A capsule of scar tissue forms around every implant. In most patients it stays soft and unnoticed; in some it contracts and makes the breast firm, uncomfortable or distorted. Rupture can follow an injury or occur without a cause, and a gel-filled implant may show no outward sign. That is why a change in shape or firmness is examined rather than watched.
The rare lymphoma, stated plainly
An implant-associated lymphoma of the capsule — a cancer of the immune cells in the scar tissue around the implant, not of the breast itself — occurs in a small number of patients and is associated with textured surfaces. It usually presents as a persistent swelling or a collection of fluid around the implant rather than as a lump. It is rare and treatable when recognised, and its existence is why a swelling that does not settle is drained and examined.
Terms to accept before an implant
- No implant is a lifetime device, and exchange or removal at some point is likely rather than merely possible.
- The capsule can contract and the implant can rupture without warning, and neither is preventable by anything the patient does.
- Imaging follow-up is part of having a gel-filled implant, and it does not detect everything, nor does it make a new lump self-evidently benign.
These are the terms of the device rather than the risks of a badly performed operation. A patient who accepts them is choosing an implant with her eyes open; one who does not has learned something useful about which route she is considering.
Frequently asked questions
What are the classes of breast implant?
By fill, they are silicone gel-filled and saline-filled; by shell, smooth and textured. Fill and shell are separate choices, and a consultation should name both and say why that combination suits your tissue. This site describes implants by class only and names no brand.
What is capsular contracture?
A capsule of scar tissue forms around every implant. In most patients it stays soft and unnoticed. In some it tightens and contracts, making the breast firm, uncomfortable or distorted, and it can happen at any time after the operation rather than only in the first months. Treatment usually means an operation.
Can a breast implant rupture without my knowing?
A gel-filled implant can leak silently, with no change in how the breast looks or feels, which is why imaging follow-up exists for that class. A saline-filled implant usually deflates visibly instead. Any change in shape, size or firmness should be examined rather than observed.
Risks & Limitations
- Implants are not lifetime devices: exchange or removal is likely at some point, and no surgeon can say how long a particular implant will remain in place.
- Capsular contracture can make the breast firm, uncomfortable or distorted, and rupture of a gel-filled implant may produce no symptom at all.
- An implant-associated lymphoma of the capsule is rare; a persistent swelling or collection around an implant is drained and examined rather than watched.
- Grafted fat is partly reabsorbed. How much survives cannot be guaranteed, under-correction is the commonest disappointment, and a second session is common.
- Fat necrosis, oil cysts and calcification can follow fat transfer and can make later mammography harder to read. Both options change breast imaging.
- Infection, bleeding, asymmetry, altered nipple or breast sensation, and permanent scars that mature over a year occur with both operations.
- A fat-transfer donor site is a second surgical area, with its own bruising, compression garment and risk of contour irregularity.
- Revision is a further operation on tissue that has already been operated on, and it carries added risk rather than removing the risk of the first.
When to Seek Care
- Shortness of breath or chest pain — seek emergency care immediately.
- Fever, spreading redness, warmth or discharge from an incision or a donor site — contact the team the same day.
- A breast that becomes rapidly swollen, tense and painful, or a collection of fluid that appears around an implant.
- A breast that becomes hard, tender or newly distorted, or a change in the shape of an implant that does not settle.
- Any new lump, skin dimpling, nipple discharge or change in the nipple or areola — assessed on its own merits, whether or not you have had surgery.
References & Further Reading
- American Society of Plastic Surgeons (ASPS) — breast augmentation and implant surveillance guidance
- International Society of Aesthetic Plastic Surgery (ISAPS) — global standards of practice
- National Institute for Health and Care Excellence (NICE, UK) — relevant guidance
- Cochrane Library — systematic reviews in breast surgery and fat grafting
This page is patient education, not medical advice, and it does not cite individual studies. Discuss your own case with a qualified clinician. To arrange an assessment at Chongqing West District Hospital, see Contact & Consultation.