Evaluation of a new polytetrafluoroethylene guided tissue regeneration membrane in healing extraction sites.

The biological principles underlying guided tissue regeneration (GTR) are apparently well understood, and many of the molecular events involved in bone regeneration are being investigated. Much controversy exists, however, as to which membrane biomaterial is ideal for use in these procedures. Adding to the confusion, new applications of GTR membranes continue to evolve, such as extraction site reconstruction, implant site development, ridge augmentation, and the use of membranes in conjunction with the placement of dental implants. These innovative techniques place demands on the membrane that were unforeseen when the first generation of devices was developed. The present study suggests that the ideal design characteristics of a barrier membrane, such as pore size and polymer type, may depend on the intended use of the membrane, and are not fixed criteria that should be applied to all membrane devices. This article describes the clinical results in a series of case studies using a high-density, microporous polytetrafluoroethylene membrane (Cytoplast Regentex GBR-200a). To evaluate the clinical efficacy of this membrane and technique, clinical and histological evaluation of the regenerated tissue are presented.