title: A comparison of porous and non-porous teflon membranes plus demineralized freeze-dried bone allograft in the treatment of class II buccal/lingual furcation defects: a clinical reentry study.
abstract: BACKGROUND
  The aim of this 9-month reentry study was to compare the regenerative healing using porous (P) and non-porous (NP) teflon barrier membranes plus demineralized freeze dried bone allografts (DFDBA) in Class II buccal/lingual furcation defects.
  
  
  METHODS
  Twenty-four patients, 13 males and 11 females, ages 38 to 75 (mean 54 +/- 10), were included in this study. Each patient had adult periodontitis and one Class II furcation defect measuring > or = 3 mm open horizontal probing depth. Twelve patients were randomly selected to receive the NP treatment and 12 received the P membrane. All defects received a DFDBA graft. Measurements were performed by a masked examiner.
  
  
  RESULTS
  No statistically significant differences (P>0.05) were found between NP and P groups at any time with respect to any open or closed measure. Improvement in mean open horizontal probing depth was significant for both the NP (2.33 +/- 0.78 mm) and P (2.75 +/- 0.75 mm) groups. Mean clinical attachment level gains at 9 months were significant for both NP (1.50 +/- 1.62 mm) and P (2.50 +/- 2.11 mm) groups. Seventeen of 24 defects had an intrabony component and > or = 50% fill was obtained in 100% of these defects.
  
  
  CONCLUSIONS
  The results of this 9-month reentry study comparing the use of porous and non-porous barrier membranes with a DFDBA graft indicate that there were no statistically significant differences between groups. Both groups showed a statistically significant improvement following the treatment of Class II furcation defects in humans.
authors.affiliation: Graduate Periodontics, School of Dentistry, University of Louisville, KY 40292, USA.
authors.forename: J W
authors.initials: JW
authors.lastname: Lamb
authors.forename: H
authors.initials: H
authors.lastname: Greenwell
authors.forename: C
authors.initials: C
authors.lastname: Drisko
authors.forename: R D
authors.initials: RD
authors.lastname: Henderson
authors.forename: J P
authors.initials: JP
authors.lastname: Scheetz
authors.forename: G
authors.initials: G
authors.lastname: Rebitski
mesh_terms: D000328:Adult; D000368:Aged; D018775:Bone Demineralization Technique; D016025:Bone Transplantation / Q000379:methods*; D004867:Equipment Design; D005260:Female; D005500:Follow-Up Studies; D005612:Freeze Drying; D017823:Furcation Defects / Q000145:classification / Q000601:surgery*; D006801:Humans; D008297:Male; D008567:Membranes, Artificial; D008875:Middle Aged; D017622:Periodontal Attachment Loss / Q000601:surgery; D010514:Periodontal Pocket / Q000601:surgery; D010518:Periodontitis / Q000601:surgery; D011138:Polytetrafluoroethylene; D016062:Porosity; D016037:Single-Blind Method; D013223:Statistics as Topic; D013499:Surface Properties; D014021:Tissue Preservation; D014184:Transplantation, Homologous
chemical_list: D008567:Membranes, Artificial; D011138:Polytetrafluoroethylene