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Physiologic Tissue Adaptation to Face and Body Implants

 

Synthetic implants  are involved in some of the most common procedures performed in plastic surgery. From the skull down to the calfs, implants allow an instantaneous augmentation effect to be achieved of a variety of sizes and shapes. While rivaled more recently in some procedures by fat injection grafting, implants offers a permanent volume/augmentation effect that is simpler to achieve. (out of a box so to speak)

While implants offer many benefits, they also have their own set of potential complications. Infections, malposition and size issues are amongst the most common no matter where in the face and body an implant may be placed. These are obvious complications that occur in the short-term, within weeks or months after surgery.

But longer term changes which sometimes lead to complications with implants come about from a less obvious source. When a synthetic implant is placed in the body, the implant itself can never change as they are made of materials that do not degrade or change. (e.g., silicone) Rather the body must adapt to it and respond based on the pressure caused by the implant’s volume. Thus tissues change around the implant and these changes are almost always that atrophy. Surrounding tissues thin to varying degrees based on implant size and body location.

Chin Implant Settling Dr Barry Eppley IndianapolisOne of the classic examples of this response is that of the chin implant. Often erroneously referred to as ‘erosion’ (which suggests an inflammatory reaction which it is not) some chin implants can be seen on x-rays of being partially inside the bone. This is a benign but natural process of implant settling. As a response to the pressure of the chin implant, which causes its aesthetic effect by pushing off the underly bone on the soft tissues of the chin, the bone responds to this pressure over time by resorbing under the implant. This allows the chin implant to imprint into the bone. Once a ‘pressure release’ is obtained no further settling into the bone occurs. Interestingly it does not occur in all chin implants and rarely if ever occurs in any other type of facial implant.

Breast Implant Chest Wall Deformity Dr Barry Eppley IndianapolisAn often recognized example but one that is far more common is that of breast implants. The pressure release phenomenon occurs through the dual effect of overlying breast tissue thinning and underlying rib deformation. Every plastic surgeon has seen it in some women who undergo breast implant replacements. When the existing breast implant is removed, the remaining breast mound will look sunken in and deformed. This is one reason some women over time feel that their breast implants no longer look as big. The breast implant has never changed in volume but the surrounding breast tissue has become less and the implant may have settled down into the ribs more.

While this tissue response to chin and breast implants rarely causes any problems, such a response on the nose can be very problematic. Rhinoplasty that uses large implants for nasal augmentation is well known to cause thinning of the overlying soft tissues which is very thin. This can lead to implant exposure and infection.

Tissue atrophy and thinning occurs to some degree around every augmentative implant placed in the body. It usually does not cause any long-term problems but is one compelling reason to avoid very large implants at any face or body location.

Dr. Barry Eppley

Indianapolis, Indiana

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Dr. Barry EppleyDr. Barry Eppley

Dr. Barry Eppley is an extensively trained plastic and cosmetic surgeon with more than 20 years of surgical experience. He is both a licensed physician and dentist as well as double board-certified in both Plastic and Reconstructive Surgery and Oral and Maxillofacial Surgery. This training allows him to perform the most complex surgical procedures from cosmetic changes to the face and body to craniofacial surgery. Dr. Eppley has made extensive contributions to plastic surgery starting with the development of several advanced surgical techniques. He is a revered author, lecturer and educator in the field of plastic and cosmetic surgery.

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