Best Breast Implant Placement Options: Over, Under, or Dual Plane
Best Breast Implant Placement Options: Over, Under, or Dual Plane
Three options: over the muscle, under the muscle, or a dual plane that uses both. Pooled data from nearly 18,000 cases shows placement under the muscle carries meaningfully lower risk of capsular contracture. The trade-off is animation deformity, which only affects implants sitting under muscle.
Key takeaways
- Under the muscle: lower contracture risk — odds ratio 0.35 across 17,707 cases.
- Over the muscle: no animation deformity, but the implant shows more.
- Dual plane is the common middle ground, especially with mild sagging.
- Your tissue thickness often decides it more than your preference does.
The Planes, Briefly
Subglandular — over the muscle
The implant sits on top of the pectoralis major, beneath the breast tissue. No muscle is disturbed, so early recovery is generally easier and chest contraction does not move the implant.
Submuscular — under the muscle
The implant sits beneath the pectoralis major, which adds a layer of tissue over the top of it. More coverage, lower contracture risk, and the implant moves when the muscle contracts.
Dual plane — both
A hybrid. The upper portion of the implant sits under muscle; the muscle is released along the lower border so the bottom portion sits under breast tissue. Coverage where it matters, flexibility where it is needed.
Subfascial — the one usually left out
Over the muscle but beneath the fascia that covers it. Less commonly discussed, and more interesting than its profile suggests — see below.
What the Evidence Actually Shows
On the question that matters most — capsular contracture, the hardening of scar tissue around an implant that is the commonest reason for revision — there is real pooled data.
Capsular contracture by placement
- Subpectoral placement was associated with significantly lower capsular contracture rates.
- Odds ratio 0.35 (95% CI 0.25–0.50, P < .00001).
- Pooled across 11 studies and 17,707 cases.
- Heterogeneity was substantial — I² = 71%, meaning the individual studies disagreed considerably.
- Absolute percentages per plane were not reported, only the relative difference.
Under the muscle also reduces implant visibility, palpability and rippling compared with placement above it — stated as an advantage of the extra soft-tissue coverage rather than a separately measured outcome.
Several mechanisms have been proposed for the contracture difference: muscle coverage restricting implant movement and improving adhesion, better preservation of the pectoral blood supply, and the implant avoiding contact with breast tissue and the bacteria present in breast ducts.
The caveat most pages leave out
That finding is less clean than it is usually presented, and it is worth knowing why before you treat it as settling the question.
The analysis did not compare the three planes separately. Dual plane was grouped together with submuscular, since the implant is partly covered by muscle. And subglandular and subfascial were pooled together as “prepectoral.”
That pooling may hide a real difference. The authors note that an earlier meta-analysis found subfascial placement had lower contracture rates than subglandular. In one study cited in their discussion, subglandular placement significantly increased contracture compared with subpectoral — but there was no significant difference between subpectoral and subfascial.
So “under the muscle is safer” is roughly right and imprecisely stated. What the data more accurately supports is that subglandular placement carries higher contracture risk than the alternatives — and that subfascial may not share that disadvantage despite sitting over the muscle.
The Trade-offs Side by Side
| Over the muscle | Under the muscle | |
|---|---|---|
| Capsular contracture | Higher risk | Lower risk |
| Implant visibility and rippling | More visible, especially with thin tissue | Less visible |
| Animation deformity | None | Possible |
| Early recovery | Generally easier | Generally longer |
| Chest muscle function | Undisturbed | Muscle released or lifted |
| Suits thin tissue | Poorly | Well |
Animation Deformity
This is the specific cost of muscle coverage, and it deserves naming properly rather than being glossed over.
When an implant sits beneath the pectoralis major, contracting that muscle moves the implant. The result can be visible movement or distortion of the breast during chest activation — and it is a recognized cause of patient dissatisfaction.
It shows up most in movements that flex the chest: pressing, push-ups, some yoga positions. It is not a complication in the sense of something going wrong; it is a consequence of the anatomy of the pocket.
No reliable incidence figure appears in the data above, so this page does not give one. How much it bothers an individual varies widely, which is part of why it is a conversation rather than a calculation.
Why Tissue Thickness Often Decides
Most people arrive with a preference. Anatomy frequently overrules it, and this is usually the reason.
If there is not much breast tissue over the implant, there is not much to conceal it. The edges become visible, rippling shows through, and the implant can be felt. Muscle coverage solves that by adding a layer.
So for a thin patient, placement above the muscle tends to display the device rather than the result. For someone with more natural breast tissue, that coverage matters less and other factors carry more weight.
Your surgeon will assess this directly during examination. It is not something to settle from a photograph.
Why Dual Plane Became So Common
Because it addresses a situation that neither pure option handles well: a loose or sagging lower pole.
Muscle coverage at the top is where coverage does most of its work, both for concealment and for the upper pole slope. But a fully submuscular pocket can hold the implant too high and too tight to fill out a lower breast that has stretched.
Releasing the muscle along its lower border keeps the coverage up top while letting the implant sit lower and fill out the bottom. For mild sagging, it can mean a good result without a separate lift.
Situations Worth Flagging
Where the decision shifts
- Weightlifters and chest-dominant athletes. Animation deformity matters more if you train chest heavily. Worth weighing against the contracture difference rather than treating either as decisive.
- Thin tissue. Usually pushes toward muscle coverage, for the concealment reasons above.
- Mild sagging. Often where dual plane earns its place.
- Significant sagging. No plane substitutes for a lift. Placement does not raise a nipple position.
- Wanting to avoid animation deformity specifically. Ask about subfascial, given the contracture findings noted earlier.
- Revision surgery. Changing plane is possible and is sometimes done to address rippling or animation, but it is a bigger operation than the original.
Mammograms
Implants can obscure some breast tissue on standard mammography wherever they sit, which is why additional implant-displacement views are used.
Tell the imaging center you have implants when you book, so the right technique is planned. Your own screening schedule is a conversation for your physician.
What to Ask at Your Consultation
Useful questions
- Which plane are you recommending for me, and why that one?
- How much tissue do I have over the implant? This drives much of the decision.
- If dual plane, how much muscle release are you planning?
- How likely is animation deformity in my case?
- Do you offer subfascial placement, and would it suit me?
- How does this choice change my recovery timeline specifically?
- Do I need a lift as well, or will placement handle the shape?
Placement is the decision most driven by your own anatomy rather than by preference, which is why it is answered by examination rather than online. Dr. Michael Baumholtz is double board-certified in plastic surgery and general surgery, with more than two decades of experience in San Antonio.
Frequently Asked Questions
What are the breast implant placement options?
Three main ones. Subglandular places the implant over the chest muscle and under the breast tissue. Submuscular places it beneath the pectoralis major. Dual plane is a hybrid where the upper part sits under muscle and the lower part under breast tissue. A fourth, subfascial, sits over the muscle but beneath its fascia.
Is over or under the muscle better for breast implants?
Under the muscle carries meaningfully lower risk of capsular contracture. A meta-analysis pooling 11 studies and 17,707 cases found subpectoral placement was associated with significantly lower contracture rates, with an odds ratio of 0.35. Under the muscle also reduces implant visibility and rippling. The trade-off is animation deformity, which only occurs with muscle coverage.
What is animation deformity?
Visible movement or distortion of the breast when the chest muscle contracts, because the implant sits beneath that muscle. It is specific to placement under the muscle and is a recognized cause of patient dissatisfaction. It tends to be most noticeable during activities that flex the chest, such as pressing movements or push-ups.
Why do thin patients usually get implants under the muscle?
Because there is not enough breast tissue to conceal the implant on its own. Muscle coverage reduces implant visibility, palpability and rippling, so the edges are less likely to be seen or felt. Where the tissue over the implant is thin, placing it above the muscle tends to show the device itself.
Why is dual plane placement so commonly used?
It takes muscle coverage where coverage matters most, at the upper pole, while releasing the muscle along the lower border so the implant can fill a loose lower pole. That makes it useful where there is mild sagging or a tight lower breast, situations where neither pure submuscular nor pure subglandular placement sits well.
Should weightlifters and athletes avoid implants under the muscle?
Not automatically, but it is a genuine discussion to have. Placement under the muscle means chest contraction moves the implant, which matters more if you train chest heavily or compete in a sport that depends on pectoral function. Weigh it against the lower contracture risk rather than treating either factor as decisive on its own.
Does implant placement affect recovery?
Generally yes. Placement beneath the muscle involves lifting or releasing muscle, so early discomfort and the return to upper body activity usually take longer than with placement above it. Your surgeon will give you timelines specific to your procedure, since they vary with technique and with the individual.
Where does subfascial placement fit in?
It sits above the muscle but beneath the fascia covering it, and it is often left out of the conversation. One meta-analysis found subfascial placement had lower capsular contracture rates than subglandular, and in one cited study there was no significant difference between subfascial and subpectoral placement. It is worth asking about if you want to avoid animation deformity.
Does implant placement affect mammograms?
Implants can obscure some breast tissue on standard mammography regardless of where they sit, which is why additional implant-displacement views are used. Tell the imaging center you have implants when you book, so the correct technique is planned. Discuss your own screening schedule with your physician.
Can implant placement be changed later?
Moving an implant to a different plane is possible and is sometimes done in revision surgery, including to address animation deformity or visible rippling. It is a more involved operation than the original placement, so the plane is worth getting right the first time rather than treating it as easily reversible.
The Short Answer
Under the muscle carries lower capsular contracture risk — odds ratio 0.35 across 17,707 pooled cases — and conceals the implant better. Over the muscle avoids animation deformity and is generally easier early on.
Dual plane splits the difference and is why it has become so common, particularly where there is mild sagging.
But the honest version is that your tissue thickness will probably decide this more than your preference will, and that is a question for an examination rather than an article.
Related: considering breast augmentation — know your options
Source
This article is general information and does not replace assessment by a qualified surgeon. Placement suitability depends on individual anatomy. Last reviewed October 2026.
