Evaluation of a dense polytetrafluoroethylene membrane to increase keratinized tissue: a randomized controlled clinical trial.

Background: The presence of an adequate zone of keratinized tissue has been associated with implant health. This study evaluated the increasing of the zone of keratinized tissue using dense polytetrafluoroethylene (d-PTFE) membranes over extraction sites, without primary closure.

Materials And Methods: Fifteen sites received d-PTFE membranes.

Guided bone regeneration using nonexpanded polytetrafluoroethylene membranes in preparation for dental implant placements--a report of 420 cases.

The biologic principle of guided bone regeneration has been successfully used to prevent bone loss in extraction sites. This study comprises 420 cases of alveolar ridge maintenance in preparation for dental implant placements. Nonexpanded polytetrafluoroethylene membranes were positioned over all extraction sites and left intentionally exposed.

Supracrestal gingival tissue measurements in healthy human periodontium.

This randomized, blinded study compared, contralaterally, the dimensions of supracrestal gingival tissue (SGT) in healthy human periodontium. Sulcular probing reaching the crestal bone was performed in 100 dental students (400 teeth [first molars and second premolars] and 1,600 sites). Contralateral measurements were statistically analyzed by one-way analysis of variance.