Breast Implants Under the Muscle or Over? How to Choose
Under the muscle, over the muscle, dual plane or subfascial — what each implant position means for the look, the recovery and the long-term risks.
Medically reviewed by Op. Dr. Murat Yaman, Plastic Surgeon
Whether to place breast implants under the muscle or over it is one of the main decisions in a breast augmentation, and it is decided by your anatomy more than by fashion. The position affects how natural the upper breast looks, how the first week feels, what happens when you train your chest, and some long-term risks. This guide explains the options in plain language and how a surgeon chooses between them.
The four implant positions
The muscle in question is the pectoralis major, the large chest muscle that lies under the breast.
- Over the muscle (subglandular): the implant sits directly under the breast tissue, on top of the muscle.
- Under the muscle (submuscular): the implant sits beneath the chest muscle. In practice the muscle covers only the upper part of the implant.
- Dual plane: a refinement of the under-the-muscle technique. The upper part of the implant is covered by muscle and the lower part by breast tissue, so that the implant can fill the lower breast. Most "under the muscle" operations today are dual plane.
- Subfascial: the implant sits under the thin, strong layer (fascia) that covers the muscle, but over the muscle itself.
Under or over the muscle implants: comparison
| Over the muscle | Under the muscle (dual plane) | |
|---|---|---|
| Cover over the upper implant | Breast tissue and skin only | Muscle plus breast tissue |
| Look of the upper breast | Rounder; the edge can show in slim patients | Smoother, more gradual slope |
| Rippling | More likely to be visible with thin tissue | Less visible in the upper and inner breast |
| Movement when the chest muscle tightens | None | Possible ("animation") |
| Pain in the first days | Usually less | Usually more; a tight, pressing feeling |
| Time for implants to settle | Shorter | Longer; they sit high at first |
| Capsular contracture | Higher in most published comparisons | Lower in most published comparisons |
| Mammograms | More breast tissue can be hidden | Usually easier to image |
Breast implants under the muscle: pros and cons
The main advantage is cover. A layer of muscle over the upper half of the implant hides its edge and softens the transition from chest to breast, which matters most in slim women with little breast tissue. Rippling is less visible in the cleavage and upper breast. Reviews of published studies have generally found less capsular contracture — hardening of the scar tissue around the implant, the most common reason for revision — with submuscular placement than with subglandular placement, particularly for smooth implants.
The disadvantages are real. The first days are more uncomfortable because the muscle has been lifted and stretched. The implants sit high for longer before they settle. And when you tense your chest — pushing a heavy door, doing press-ups — the muscle can press on the implant and make the breast move or change shape for a moment. This "animation deformity" is mild in most patients, but it can bother those who train their upper body seriously. Over many years, the muscle can also push the implants slightly outwards.
Breast implants over the muscle: pros and cons
Placing the implant over the muscle leaves the muscle untouched. Recovery is usually more comfortable, the breasts do not move when the muscle works, and the implant can fill a slightly empty or mildly drooping breast directly. For these reasons some surgeons prefer it for athletes and bodybuilders and for patients with plenty of their own breast tissue.
The limit is cover. With thin tissue, the upper edge of the implant can be seen or felt, the breast can look more obviously round, and rippling is more likely to show. Capsular contracture has been reported more often in this position in most comparisons. Because more of the breast tissue lies in front of the implant on the same plane, mammograms can be harder to read; radiographers use special views in either case, so always say that you have implants.
Dual plane and subfascial: the middle options
Dual plane is now the standard version of under-the-muscle placement for many surgeons because it combines muscle cover at the top, where tissue is thinnest, with direct filling of the lower breast. The surgeon adjusts how much of the implant the muscle covers; a breast that droops slightly needs less muscle cover over the lower half.
Subfascial placement aims for a little more cover than over the muscle without the movement of under the muscle. The fascia is thin, so the extra cover is modest, and the technique has less long-term published evidence than the two main options. It is used mostly for athletic patients with enough breast tissue.
Which placement suits you?
Surgeons often use a pinch test: they measure the thickness of the tissue in the upper breast between finger and thumb. With about 2 cm or more, an implant over the muscle is usually well covered; with less, most surgeons advise placement under the muscle or dual plane.
- Slim, small breasts, thin tissue: usually under the muscle (dual plane).
- Enough breast tissue, mild emptiness after pregnancy or weight loss: over the muscle, subfascial or dual plane are all possible.
- Serious upper-body training or bodybuilding: over the muscle or subfascial is often discussed, if the tissue allows it.
- Large implants on a narrow chest: more cover is safer; see our guide to breast implant sizes.
- Nipples at or below the fold: the position of the implant will not lift the breast; a breast lift with implants may be needed.
Recovery: what is different?
With implants under the muscle, expect more tightness and pressure in the first three to five days and a longer wait before chest exercises — often around three months. With implants over the muscle, the first week is usually easier and the breasts look settled sooner. The other steps are the same for both: a support bra for about six weeks, no lifting, and a review before returning to sport. The full timeline is in our guide to breast augmentation recovery week by week.
What placement does not change
Whatever the position, implants are not lifetime devices. The FDA states that about 20 in 100 augmentation patients have their implants removed within 8–10 years, and it recommends an ultrasound or MRI five to six years after surgery and then every two to three years to look for silent rupture of silicone implants. The risk of BIA-ALCL, a rare lymphoma, is linked mainly to the textured surface of an implant, not to whether it lies over or under the muscle.
Questions to ask before a breast augmentation in Turkey
- Which position do you recommend for me, and what did you measure to decide?
- How much of the implant will the muscle cover (dual plane)?
- How will this position look when I exercise?
- What happens if I later need a revision — can the position be changed?
- Will the position be written in my operation report?
For a breast augmentation in Turkey, the surgeon gives a first opinion from your photos and confirms the position after examining you in person. The placement does not normally change the package price, which starts from €4,870 at the hospitals on our site. Other operations are listed under plastic surgery in Turkey, and you can send your photos and questions through the free quote form.
Send your details and a coordinator will prepare a free, written plan with verified doctors.
Frequently asked questions
Neither is better for everyone. Under the muscle gives more cover and a smoother upper breast in slim women and has shown less capsular contracture in most comparisons; over the muscle recovers more comfortably and does not move with the chest muscle, but needs enough of your own tissue.
Usually yes, for the first three to five days, because the chest muscle is lifted and stretched. Patients describe tightness and pressure, which prescribed painkillers control.
In slim women with little breast tissue they usually do, because the muscle hides the upper edge of the implant. With enough breast tissue, implants over the muscle can look just as natural.
Yes, after your surgeon agrees — chest exercises usually wait about three months. The breasts may move or change shape briefly when the chest muscle tightens, which matters most to people who train their upper body seriously.
A version of under-the-muscle placement in which the muscle covers the upper part of the implant and breast tissue covers the lower part. It is the most common form of submuscular placement today.
Any implant can settle lower with time, and heavier implants do so more. Over the muscle the weight is carried by the breast tissue and skin alone, so good tissue quality and a sensible size matter more.
Yes. They usually sit high and firm for longer because the muscle is tight, and settle over three to six months; implants over the muscle often look settled sooner.
