Breast Implants: Consideration #6: Position of Implants - Above or Below Muscle
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- Subglandular implant: The prosthesis is placed under the breast tissue but on top of the pectoralis major muscle.
- Subpectoral implant (or submuscular implant): The prosthesis is placed behind the pectoralis major muscle (which is itself behind the breast gland).
Obviously, Holly, you deserve a customized evaluation, and only then can a Board Certified Plastic Surgeon help you make the best decision. Nevertheless, there are some general advantages and disadvantages of the two options....
Subglandular Implants
Advantages:
- Technically easier operation for the surgeon
- Can be placed without general anesthesia (without going totally to sleep)
- Larger implants can be accomodated
- Potentially, more cleavage can be created
- No surgery on the muscle; therefore, less discomfort
- No surgery on the muscle; therefore, faster recovery time
- More "lift" effect, so that formal breast up-lift operations can be avoided
Disadvantages
- The "look" tends to be more artificial and less natural
- More rippling
- Greater likelihood of capsular contracture
- More difficult to interpret mammograms
Subpectoral Implants
Advantages
- Usually, a more natural breast appearance
- Less rippling
- Lower risk of capsular contracture
- More successful mammogram readings
Disadvantages
- More difficult operation
- Requires general anesthesia
- Can not always produce as much cleavage as the patient might desire
- More discomfort
- Longer recovery time
- Among women with large pectoralis majors, muscle contraction can distort the implant
Practically speaking, I try to convince most of my patients here in Ventura, California (>90%) to undergo subpectoral placements. The unusual exceptions...
- Extreme fear of general anesthesia
- Very low pain tolerance
- Looking for a "fake" look
- High performance athletes, whose pectoralis major muscles should not be altered
- Body builders, in whom muscle flexion would distort their breasts during competitions
- Male-to-female transsexuals, whose large XY pectoralis major muscles would not accomodate a subpectoral implant
I like saline implants above the muscle when the patient...
- ...already has a fair amount of breast tissue.
- Saline implants tend to ripple more than silicone.
- Hence, those implants need some sort of coverage to camouflage that rippling.
- That coverage can come from the muscle or from breast tissue.
- If a woman's breasts are already big, but she would like them even bigger, placing implants on top of the muscle is usually OK.
- The breasts are naturally on top of the muscles.
- Therefore, if the muscles move, the overlying breasts shouldn't move that much.
- However, if the implants are beneath the muscles, the breasts might move unnaturally when the muscles contract.
- Since most women don't exercise naked, this is a minor issue for most patients.
- Nevertheless, some women do compete in sports in small bikinis, and they are aware of breast distortions with shoulder/chest muscle contractions (such as beach volleyball players, surfers, body builders...see below)
- Body builders have very well developed muscles.
- Contraction of those big muscles would significantly distort the positions of sub-muscular implants.
- These women do pose nearly naked (in small bikinis) while flexing their muscles.
- Even though these women do not have a lot of body fat, implants on top of the muscle are generally better.
- In competitions, the rippling of the implants looks less bad than implant distortion.
- Implants themselves provide breast rejuvenation.
- The muscles tend to mute the rejuvenative/lift-up effects of breast augmentations.
- Even though many women need mastopexies (lift-up surgeries) at the same time as their augmentations, some patients prefer to avoid the additional scars of mastopexies and accept the limitations of implants on top of the muscles.
- Most breast implants surgeries do not require a long recovery.
- However, positioning of the implants below the muscle is more uncomfortable.
- Staying on top of the muscle is much less painful.
Generally, I use silicone implants when patients choose to have their augmentations on top of the muscle. Or, better yet, I place implants beneath the muscle in 90% of circumstances...
- to minimize rippling
- to reduce excess scar tissue around the implants (known as capsular contracture)

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