title: The effect of postsurgical naproxen and a bioabsorbable membrane on osseous healing in intrabony defects.
abstract: BACKGROUND
  Previous reports in the literature have shown that non-steroidal anti-inflammatory drugs (NSAID) may affect osseous tissues by either stimulating or inhibiting bone formation. This effect can be drug specific and different NSAIDs may produce opposite results. There are also reports showing that NSAIDs inhibit bone loss due to inflammatory disease process. The purpose of this randomized, controlled, blinded, clinical investigation was to determine the effect of a one week course of postsurgical naproxen on the osseous healing in intrabony defects.
  
  
  METHODS
  Twenty-four vertical osseous defects in 24 patients were treated with either a bioabsorbable membrane plus twice daily postsurgical naproxen 500 mg for one week (test or GPN group) or with a polylactide bioabsorbable membrane alone (control or GA group). Twelve patients were included in each group. Treatment was performed on either 2- or 3-wall or combination defects. All measurements were taken from a stent by a calibrated, blinded examiner and open measurements were repeated at the 9-month second stage surgery. Power analysis to determine superiority of naproxen treatment showed that a 12 per group sample size would yield 87% power to detect a 2.0 mm difference and 64% power to detect a 1.5 mm difference.
  
  
  RESULTS
  Open defect measurements from baseline to 9 months showed a statistically significant (P < 0.05) mean defect fill of 1.96 +/- 1.27 mm and 2.04 +/- 1.71 for the GPN and GA groups, respectively. This corresponded to a mean defect fill of 42% and a mean defect resolution of approximately 75% for both groups. The differences between GPN and GA groups were not statistically significant (P > 0.05). Defect fill of > or = 50% was seen in 6 defects (50%) in the GPN group and in 5 defects (42%) in the GA group.
  
  
  CONCLUSIONS
  The administration of postsurgical naproxen failed to produce osseous healing that was statistically superior to that obtained with polylactide bioabsorbable membranes alone.
authors.affiliation: Department of Periodontics, Endodontics and Dental Hygiene, School of Dentistry, University of Louisville, KY 40292, USA.
authors.forename: J
authors.initials: J
authors.lastname: Bichara
authors.forename: H
authors.initials: H
authors.lastname: Greenwell
authors.forename: C
authors.initials: C
authors.lastname: Drisko
authors.forename: J W
authors.initials: JW
authors.lastname: Wittwer
authors.forename: T M
authors.initials: TM
authors.lastname: Vest
authors.forename: J
authors.initials: J
authors.lastname: Yancey
authors.forename: J
authors.initials: J
authors.lastname: Goldsmith
authors.forename: G
authors.initials: G
authors.lastname: Rebitski
mesh_terms: D020341:Absorbable Implants; D000328:Adult; D000368:Aged; D016301:Alveolar Bone Loss / Q000601:surgery*; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000494:pharmacology*; D001672:Biocompatible Materials; D001861:Bone Regeneration / Q000187:drug effects*; D004311:Double-Blind Method; D005260:Female; D016557:Guided Tissue Regeneration, Periodontal / Q000379:methods*; D006801:Humans; D008297:Male; D008567:Membranes, Artificial; D008875:Middle Aged; D009288:Naproxen / Q000494:pharmacology*; D017063:Outcome Assessment, Health Care; D010512:Periodontal Index; D011091:Polyesters
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; D001672:Biocompatible Materials; D008567:Membranes, Artificial; D011091:Polyesters; C033616:poly(lactide); D009288:Naproxen