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.


METHODS
Fifteen sites received d-PTFE membranes. The control sites received no membranes. All cases were sutured with no attempt to achieve primary closure. Before surgery, initial measurements of buccal and lingual keratinized tissue were taken from the mucogingival line (MGL) to the most coronal gingival margins. Final measurements were taken from the buccal MGL to the lingual MGL, 60 and 90 days after extractions.


RESULTS
In the test group, a mean increase in the zone of keratinized tissue of 7.06 ± 2.63 mm and 6.6 ± 2.84 mm was observed in 60 and 90 days, respectively. In the control group, a mean increase of 2.46 ± 1.59 mm and 1.40 ± 1.40 mm was observed in 60 and 90 days, respectively.


CONCLUSIONS
Nonexpanded d-PTFE membranes can predictably be used to increase the zone of keratinized tissue in preparation to implant placement.
*Associate Professor, Department of Periodontology, Fluminense Federal University, Rio de Janeiro, Brazil. †Private Practice, Rio de Janeiro, Brazil. ‡Adjunct Professor, Department of Periodontology, Fluminense Federal University, Rio de Janeiro, Brazil. §Graduate Student, Department of Periodontology, Fluminense Federal University, Rio de Janeiro, Brazil. ‖Graduate Student, Department of Periodontology, State University of Rio de Janeiro, Rio de Janeiro, Brazil.
Eliane Porto
EP
Barboza
Bianca
B
Stutz
Denize
D
Mandarino
Diogo Moreira
DM
Rodrigues
Vinícius Farias
VF
Ferreira
D001861:Bone Regeneration / Q000502:physiology; D005881:Gingiva / Q000503:physiopathology; D006801:Humans; D007633:Keratins / Q000378:metabolism*; D008566:Membranes; D011138:Polytetrafluoroethylene; D014081:Tooth Extraction / Q000009:adverse effects / Q000379:methods; D020390:Tooth Socket / Q000503:physiopathology*
D007633:Keratins; D011138:Polytetrafluoroethylene