Breast Augmentation: Over the Muscle Versus Under the Muscle

I want breast implants, but I am confused whether they should be placed on top of the muscle or under the muscle.  What are the advantages and disadvantages of the two techniques?

-Holly S.

Holly, this is a very common question among breast augmentation patients.  The surgical terms are...

• 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