Is capsular contracture more or less likely with under muscle implants?

There is no clear cut evidence on this questionWhen implants are placed under the muscle, the muscle is often released resulting in the  lower  portion of the implant being  under the skin .I normally place implants under the fascia (the lining of the muscle).This appears to  have a protective effect and eliminates  the risk of animation deformity

There are many featured that are thought to be associated with the incidence of capsular contracture, including the type of implants used, the implant coating, bleeding during the augmentation surgery and many other factors. An important study some years ago suggested that placing implants below the muscle may be associated with a lower risk of capsule formation. I would suggest having a discussion with your surgeon to evaluate this further, as the implant position will also impact on the aesthetic outcome.