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

You will have varying answers on this question depending on the surgeon's bias.From what I have seen, after 25 years of practice, both from my own experience, and from reading the surgical literature, there should be little doubt the rate of capsular contracture is significantly reduced with implants placed in the sub muscular  position.( properly described as partial sub muscular)Contracture used to be a constant problem in most surgeon's practices before routine sub muscular placement. While it still occurs on occasion, it is almost a rare event now. You still need to accept it could happen to you, but the regular sight of hard, billiard ball like breasts we used to see, in the office and at beach resorts, is unusual today

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.