Clinical experience with the medpor porous polyethylene implant

Abstract

The Medpor porous polyethylene implant is a highly stable and somewhat flexible porous alloplast that has been shown to exhibit rapid tissue ingrowth into its pores. A total of 116 Medpor implants were placed in 70 patients over a four-year period. Implants were used for the chin, malar area, nasal reconstruction, ear reconstruction, orbital reconstruction, and the correction of craniofacial contour deformities. Many of these implants were placed in areas long considered problematic such as areas of thin soft tissue coverage, extensive scarring, and severe facial burns. Nine complications occurred including seven exposures, all of which occurred in areas of minimal soft tissue coverage. Because of the rapid vascularization of the implants, only two implants were removed, both from the columella. On the basis of our results, it is felt that the Medpor implant is an excellent alternative to existing implant materials. The implant is easy to shape; it is strong yet somewhat flexible; it is remarkably stable; and it exhibits tissue ingrowth into its pores.

Reconstruction of Partial Auricular Defects by Polypropylene Mesh Helix Framework

“…Zhao et al 2009 mentioned that the infection was in 8 cases (0.5%) from 1485 cases underwent autogenous graft framework while was 1 case (0.2%) in 355 MEDPOR ® alloplastic frame cases [9]. While Wellisz, 1993 reported no cases of infection occurred in 41 patients with porous polyethylene Implants were placed as an ear framework reconstructions [12]. In this article two cases with mild infection were easily treated, the two cases were post traumatic.…”

“…The alloplastic implant has to be easy to shape, strong yet somewhat flexible and is remarkably stable; and it exhibits tissue ingrowth into its pores. It should be highly inert material [12]. Silicone rubber was commonly used throughout the 1960s and 1970s for ear and nasal reconstruction, exhibited a high extrusion rate likely due to its lack of porosity and tissue adherence [13].…”

“…While Piero et al, 2000 mentioned that MEDPOR ® is a porous alloplastic material and rarely become infected, when exposed will not be absorbed like cartilage [15]. reported five implant exposures, these were managed without removal of the implant, and all went on to heal uneventfully [12]. Sengezer et al, 1996 mentioned three exposures in 10 ear reconstruction cases which were managed without implant removal [18].…”

“…The reconstruction must start by placing the framework in an ideal position under unscarred skin [11]. Wellisz, 1993 said that no complications were associated with any of the implants placed in deep tissue pockets in 41 cases of ear reconstruction [12].…”

Medpor Bone Implant Mimicking Postoperative Epidural Hematoma

“…Furthermore, graft resorption may also occur with autogenous implants. [11,12] Alloplastic implants are very useful for cranioplasty. Smooth-surfaced, solid implants include those made of silicone, methylmethacrylate, vitallium, silicone rubber, and titanium.…”