title: Soft and hard tissues healing at immediate transmucosal implants placed into molar extraction sites with collagen membrane uncovered: a 12-month prospective study.
abstract: OBJECTIVE
  To assess soft and hard tissues healing at immediate transmucosal implants placed into maxillary molar region with collagen membranes uncovered.
  
  
  METHODS
  Twenty subjects received 20 immediate transmucosal implants placed in maxillary molar extraction sockets. Periimplant marginal defects were treated according to the principles of guided bone regeneration by means of deproteinized bovine bone mineral particles in conjunction with collagen membrane. Flaps were repositioned and sutured, allowing nonsubmerged, transmucosal soft tissues healing. The collagen membranes adapted around implant neck were uncovered.
  
  
  RESULTS
  No implants were lost during the 1-year observation period yielding a survival rate of 100%. No postsurgical wound healing complications were observed. No degranulation of grafting material was reported.
  
  
  CONCLUSIONS
  The results of this 12-month prospective study showed that the exposure of collagen membrane at time of the flap suturing does not represent a limitation for the soft and hard tissues healing at immediate transmucosal implants placed into maxillary molar extraction sites.
authors.affiliation: *Assistant Professor, Department of Neurosciences, Reproductive and Odontostomatological Sciences, School of Medicine, University of Naples "Federico II," Naples, Italy. †Clinical Assistant, Department of Neurosciences, Reproductive and Odontostomatological Sciences, School of Medicine, University of Naples "Federico II," Naples, Italy. ‡Associate Professor, Department of Neurosciences, Reproductive and Odontostomatological Sciences, School of Medicine, University of Naples "Federico II," Naples, Italy.
authors.forename: Carlo
authors.initials: C
authors.lastname: Cafiero
authors.forename: Gaetano
authors.initials: G
authors.lastname: Marenzi
authors.forename: Andrea
authors.initials: A
authors.lastname: Blasi
authors.forename: Vincenzo Iorio
authors.initials: VI
authors.lastname: Siciliano
authors.forename: Michele
authors.initials: M
authors.lastname: Nicolò
authors.forename: Gilberto
authors.initials: G
authors.lastname: Sammartino
mesh_terms: D000328:Adult; D003094:Collagen; D003757:Dental Implantation / Q000009:adverse effects / Q000379:methods*; D005260:Female; D016557:Guided Tissue Regeneration, Periodontal / Q000379:methods; D006801:Humans; D008297:Male; D008875:Middle Aged; D008963:Molar / Q000601:surgery; D011446:Prospective Studies; D014081:Tooth Extraction; D020390:Tooth Socket / Q000601:surgery; D014945:Wound Healing; D055815:Young Adult
chemical_list: D003094:Collagen