Why does my breast implant sit in the wrong place?

After breast reconstruction or augmentation, an implant can sit in the wrong place because the surrounding tissue is pulling it out of position or no longer supporting it adequately. These are different problems, and the distinction matters when choosing an operation.

"Why does my breast implant sit in the wrong place?" is one of the questions we hear most, in the office and in the search bar. It comes from women years out from breast reconstruction, with and without radiation, and from women whose breast augmentation has changed after pregnancy, weight loss, or simply time. An implant is supposed to sit in a defined place, centered behind the nipple and resting on the fold beneath the breast, and asking whether the tissue around it is too tight or too loose does not explain every case, but it organizes the examination and the conversation about what a correction needs to accomplish. An implant does not move on its own; it sits where the tissue around it has put it.

What tightness does to an implant

Every breast implant is surrounded by a capsule, the layer of scar the body forms around any implanted device. When that capsule tightens, the first thing it changes is the implant's shape: the implant flattens, narrows, or dents where the capsule constricts it, and the breast feels firm. Given more time and more tightness, the capsule changes the implant's position, almost always upward, leaving the lower breast less filled. When the implant sits behind the pectoralis muscle, the muscle adds its own pull with every contraction, but tightness occurs with implants in front of the muscle too, so the implant's plane alone does not establish the cause.

Why the tissue tightens

The most common cause is capsular contracture, a thickening and tightening of the capsule rather than an infection or a failure of the implant. In the manufacturer-sponsored Mentor MemoryGel core study, the estimated 10-year risk of Baker grade III or IV contracture, the grades at which the breast is firm and visibly altered, with pain at grade IV, was 12.1% after a first augmentation and 20.5% after a first breast reconstruction. When the implant was itself a replacement, the estimates were higher: 24.4% after revision augmentation and 36.9% after revision reconstruction (Caplin, 2021). Those are figures for one implant in one study, not a prediction for any individual, but they are large enough that contracture belongs in the conversation before anyone chooses an implant.

The cause is not always identifiable. Bacterial biofilm, a community of bacteria attached to the implant surface, is one proposed contributor, and a multicenter study of removed implants found that bacterial cultures tracked with contracture severity, though that does not establish the cause in an individual patient (Rieger, 2013). In our experience, timing offers a clue: contracture within the first few years more often has biofilm behind it, and contracture appearing much later more often follows a silent rupture or a damaged implant shell. Radiation worsens all of it, because irradiated tissue scars more and heals less. When tightness develops, we consider when it began, the implant's condition, the prior operations, and the radiation history together rather than assigning a cause from timing alone.

What looseness does to an implant

The opposite problem is gravity. When the capsule and the tissue around it no longer provide enough support, the implant drifts, settling too low when standing and moving toward the armpit when lying flat, until it rests wherever the pocket allows. The pocket and the skin envelope both matter. A stretched pocket gives the implant room to move, and skin that stretches with it offers little resistance to the implant's weight, which is also why the size of the implant enters the discussion. When a stretched capsule meets skin that stretches with it, the implant goes where its weight takes it.

Any patient can develop this, but it is more common after substantial weight loss, after the expansion and deflation of pregnancy, and in women with inherited connective tissue conditions, where the skin envelope offered less support to begin with. We also need to distinguish an implant that has moved from breast tissue that has descended over an implant that stayed put. The two can look alike to a patient and require different corrections.

Correcting tightness

For breast reconstruction patients with a tight, high implant behind the pectoralis, the answer is often to change the plane: remove the implant from behind the muscle, return the muscle to the chest wall, and create a new pocket in front of it. A single-surgeon retrospective series supports this approach for animation deformity, the distortion the muscle produces when it contracts over an implant, though it does not make plane change the answer to every high or tight implant, and the tissue that will cover the new pocket has to be suitable (Jones, 2019). We have written about change of plane in detail. In augmentation patients we use the term restoration breast augmentation for the same operation, because it returns the pectoralis to its native function while repositioning the implant.

Treating capsular contracture usually means releasing or removing the capsule and exchanging the implant. The extent of that surgery depends on what we find, and recurrence remains part of the conversation before surgery, not after.

Radiation changes the assessment. A prospective multicenter study found more complications and lower breast satisfaction after irradiated implant reconstruction than after irradiated autologous reconstruction (Jagsi, 2018). For some women, replacing the implant with their own tissue is therefore the better answer, with a recovery and risks of its own.

Correcting looseness

Here the job is stability. That can mean tightening the pocket, reinforcing the fold beneath the breast, reconsidering the implant's size, or combining approaches. In selected patients, moving the implant behind the muscle gives it a more controlled pocket, which is the opposite of the move above and the reason the diagnosis has to come first: a plane change that helps one patient introduces a problem for another. In our practice we also use biosynthetic mesh in selected cases to reinforce a repair when the patient's own tissue cannot; the "internal bra" describes its purpose, not a permanent guarantee. A breast lift addresses excess skin and descended breast tissue when those contribute, though it does not by itself repair every stretched pocket. For women whose tissue has repeatedly failed to support an implant, their own tissue may offer the stability that implants cannot.

Speaking with your surgeon

Implant malposition describes a finding rather than a single diagnosis, so no single operation fits it. A useful plan explains what has changed, how the proposed operation addresses it, and what might limit how long the result lasts. Four questions guide most of that conversation. Is the tissue too tight, too loose, or both? What is causing the change? How does the proposed operation address that cause, and not only the implant? What is the chance the problem returns?

The position matters, but so do comfort, movement, and how the breast fits into daily life, and those are also part of deciding whether your breast reconstruction worked.

Related: Implant malposition correction, Breast implant revision, Capsular contracture treatment.

References

Caplin DA, Calobrace MB, Wixtrom RN, Estes MM, Canady JW. MemoryGel breast implants: final safety and efficacy results after 10 years of follow-up. Plastic and Reconstructive Surgery. 2021;147(3):556-566. doi:10.1097/PRS.0000000000007635

Rieger UM, Mesina J, Kalbermatten DF, et al. Bacterial biofilms and capsular contracture in patients with breast implants. British Journal of Surgery. 2013;100(6):768-774. doi:10.1002/bjs.9084

Jones GE, King VA, Yoo A. Prepectoral site conversion for animation deformity. Plastic and Reconstructive Surgery Global Open. 2019;7(7):e2301. doi:10.1097/GOX.0000000000002301

Jagsi R, Momoh AO, Qi J, et al. Impact of radiotherapy on complications and patient-reported outcomes after breast reconstruction. Journal of the National Cancer Institute. 2018;110(2):157-165. doi:10.1093/jnci/djx148

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