title: Root coverage using acellular dermal matrix and comparing a coronally positioned tunnel with and without platelet-rich plasma: a pilot study in humans.
abstract: BACKGROUND
  The primary aim of this randomized, controlled, blinded clinical pilot study was to compare the percentage of recession defect coverage obtained with a coronally positioned tunnel (CPT) plus an acellular dermal matrix allograft (ADM) to that of a CPT plus ADM and platelet-rich plasma (CPT/PRP) 4 months post-surgically.
  
  
  METHODS
  Eighteen patients with Miller Class I or II recession >or=3 mm at one site were treated and followed for 4 months. Nine patients received a CPT plus ADM and were considered the positive control group. The test group consisted of nine patients treated with a CPT plus ADM and PRP. Patients were randomly selected by a coin toss to receive the test or positive control treatment.
  
  
  RESULTS
  The mean recession at the initial examination for the CPT group was 3.6 +/- 1.0 mm, which was reduced to 1.0 +/- 1.0 mm at the 4-month examination for a gain of 2.6 +/- 1.5 mm or 70% defect coverage (P <0.05). The mean recession at the initial examination for the CPT/PRP group was 3.3 +/- 0.7 mm, which was reduced to 0.4 +/- 0.7 mm at the 4-month examination for a gain of 2.9 +/- 0.5 mm or 90% defect coverage (P <0.05). There were no statistically significant differences between the groups (P >0.05).
  
  
  CONCLUSIONS
  The CPT plus ADM and PRP produced defect coverage of 90%, whereas the CPT with ADM produced only 70% defect coverage. This difference was not statistically significant, but it may be clinically significant.
authors.affiliation: Graduate Periodontics, School of Dentistry, University of Louisville, Louisville, KY 40292, USA.
authors.forename: Neal
authors.initials: N
authors.lastname: Shepherd
authors.forename: Henry
authors.initials: H
authors.lastname: Greenwell
authors.forename: Margaret
authors.initials: M
authors.lastname: Hill
authors.forename: Ricardo
authors.initials: R
authors.lastname: Vidal
authors.forename: James P
authors.initials: JP
authors.lastname: Scheetz
mesh_terms: D000328:Adult; D000368:Aged; D003094:Collagen / Q000627:therapeutic use*; D003774:Dental Plaque Index; D005260:Female; D005500:Follow-Up Studies; D005881:Gingiva / Q000473:pathology / Q000637:transplantation*; D005889:Gingival Recession / Q000145:classification / Q000601:surgery*; D005893:Gingivoplasty / Q000379:methods; D006801:Humans; D007633:Keratins; D008297:Male; D008875:Middle Aged; D017622:Periodontal Attachment Loss / Q000145:classification; D010512:Periodontal Index; D010514:Periodontal Pocket / Q000145:classification; D010865:Pilot Projects; D053657:Platelet-Rich Plasma; D016037:Single-Blind Method; D017768:Skin, Artificial; D013524:Surgical Flaps; D014086:Tooth Mobility / Q000145:classification; D014092:Tooth Root / Q000601:surgery*; D055815:Young Adult
chemical_list: D007633:Keratins; D003094:Collagen