title: A randomized clinical trial comparing enamel matrix derivative and membrane treatment of buccal class II furcation involvement in mandibular molars. Part II: secondary outcomes.
abstract: BACKGROUND
  This multicenter, randomized trial compared enamel matrix derivative (EMD) with barrier membranes for the treatment of Class II mandibular furcations with regard to secondary outcomes. The influence of furcation morphology on the effectiveness of either treatment was also evaluated.
  
  
  METHODS
  Forty-eight patients (age range 28 to 73 years; 22 females, 26 males) with buccal Class II furcation involvements in both contralateral lower first or second molars were included. After initial periodontal treatment, defects were randomized to either EMD or bioabsorbable guided tissue regeneration (GTR) barrier. Study design and the results for the primary parameter were previously described. Results of the following secondary outcome variables are reported here: changes of the hard tissue boundaries describing the anatomical situation of the furcation defect and changes in the following clinical parameters between baseline and 14 months: plaque, level of gingival margin, probing depth, bleeding on probing, attachment level, and bone sounding at five sites/tooth at the buccal side. Descriptive statistics were applied for changes in clinical parameters and measurements of hard tissue boundaries. The differences observed under treatment with EMD or membrane were analyzed by means of the Wilcoxon two-sample test. The difference between the effect of the EMD and membrane treatment was estimated by means of the Hodges-Lehmann estimator.
  
  
  RESULTS
  Overall, similar healing results were observed for both treatments. However, there was slightly more recession in the mid-furcation site following membrane treatment (P = 0.04). Additionally, different treatment effects could be detected for the distances from the stent or cemento-enamel junction (CEJ) to the buccal bone crest, mid-distal root (Pstent = 0.01; PCEJ = 0.07) and for the distance from the stent or CEJ to the buccal bone crest, mid-mesial root (Pstent = 0.01; PCEJ = 0.01). There was no measurable bone resorption in EMD sites, whereas a slight resorption occurred with membrane treatment. Furcation morphology at the time of surgery was not associated with clinical outcome, irrespective of the treatment.
  
  
  CONCLUSIONS
  With regard to secondary outcome parameters, enamel matrix derivative treatment led to a similar regenerative result as the membrane procedure.
authors.affiliation: Department of Periodontology, University of Giessen, Giessen, Germany. joerg.meyle@dentist.med.uni-giessen.de
authors.forename: Jörg
authors.initials: J
authors.lastname: Meyle
authors.forename: José R
authors.initials: JR
authors.lastname: Gonzales
authors.forename: Rolf H
authors.initials: RH
authors.lastname: Bödeker
authors.forename: Thomas
authors.initials: T
authors.lastname: Hoffmann
authors.forename: Steffen
authors.initials: S
authors.lastname: Richter
authors.forename: Bernd
authors.initials: B
authors.lastname: Heinz
authors.forename: Mehrdad
authors.initials: M
authors.lastname: Arjomand
authors.forename: Elmar
authors.initials: E
authors.lastname: Reich
authors.forename: Anton
authors.initials: A
authors.lastname: Sculean
authors.forename: Karin
authors.initials: K
authors.lastname: Jepsen
authors.forename: Søren
authors.initials: S
authors.lastname: Jepsen
mesh_terms: D020341:Absorbable Implants; D000328:Adult; D000368:Aged; D000539:Alveolar Process / Q000473:pathology; D003746:Dental Enamel Proteins / Q000627:therapeutic use*; D003774:Dental Plaque Index; D005260:Female; D005500:Follow-Up Studies; D017823:Furcation Defects / Q000145:classification / Q000473:pathology / Q000601:surgery*; D005884:Gingival Hemorrhage / Q000601:surgery; D005889:Gingival Recession / Q000601:surgery; D016557:Guided Tissue Regeneration, Periodontal; D006801:Humans; D008297:Male; D008336:Mandibular Diseases / Q000473:pathology / Q000601:surgery*; D008567:Membranes, Artificial; D008875:Middle Aged; D008963:Molar / Q000473:pathology*; D017622:Periodontal Attachment Loss / Q000601:surgery; D010514:Periodontal Pocket / Q000601:surgery; D016896:Treatment Outcome
chemical_list: D003746:Dental Enamel Proteins; D008567:Membranes, Artificial; C109069:enamel matrix proteins