title: Guided bone regeneration using demineralized allogenic bone matrix with calcium sulfate: case series.
abstract: OBJECTIVE
  The purpose of this case series was to evaluate the effect of guided bone regeneration using demineralized allogenic bone matrix with calcium sulfate.
  
  
  METHODS
  Guided bone regeneration using Demineralized Allogenic Bone Matrix with Calcium Sulfate (AlloMatrix™, Wright. USA) was performed at the time of implant placement from February 2010 to April 2010. At the time of the second surgery, clinical evaluation of bone healing and histologic evaluation were performed. The study included 10 patients, and 23 implants were placed. The extent of bony defects around implants was determined by measuring the horizontal and vertical bone defects using a periodontal probe from the mesial, distal, buccal, and lingual sides and calculating the mean and standard deviation of these measurements. Wedge-shaped tissue samples were obtained from 3 patients and histologic examination was performed.
  
  
  RESULTS
  In clinical evaluation, it was observed that horizontal bone defects were completely healed with new bones, and in the vertical bone defect area, 15.1% of the original defect area remained. In 3 patients, histological tests were performed, and 16.7-41.7% new bone formation was confirmed. Bone graft materials slowly underwent resorption over time.
  
  
  CONCLUSIONS
  AlloMatrix™ is an allograft material that can be readily manipulated. It does not require the use of barrier membranes, and good bone regeneration can be achieved with time.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Section of Dentistry, Seoul National University Bundang Hospital, Seongnam, Republic of Korea.
authors.forename: Young-Kyun
authors.initials: YK
authors.lastname: Kim
authors.forename: Ji-Young
authors.initials: JY
authors.lastname: Lee
authors.forename: Su-Gwan
authors.initials: SG
authors.lastname: Kim
authors.forename: Seung-Chul
authors.initials: SC
authors.lastname: Lim
keywords: Calcium sulfate; Demineralized bone matrix