title: Lateral Ridge Augmentation Using Autogenous Block Grafts and Guided Bone Regeneration: A 10-Year Prospective Case Series Study.
abstract: BACKGROUND
  The use of autogenous block grafts harvested from intraoral donor sites has proven to be effective for the reconstruction of horizontal bone defects.
  
  
  OBJECTIVE
  The objective of this study was to analyze implant success and the rate of block graft resorption 10 years after ridge augmentation to elucidate contributing factors influencing graft maintenance.
  
  
  METHODS
  A staged horizontal block graft augmentation was performed in 52 implant sites exhibiting severe horizontal bone atrophy using autogenous block grafts protected by DBBM and collagen membranes. The crest width was assessed intraoperatively at surgery and at re-entry after 6 months. At the 10 year reexamination clinical and radiographic parameters were assessed using cone beam computed tomography.
  
  
  RESULTS
  The 10-year implant success rate amounted to 98.1%, with minimal peri-implant bone loss (-0.17 mm for the maxilla, -0.09 mm for the mandible). The surface resorption rate after 10 years was 7.7% (0.38 mm). Grafts originating from the chin demonstrated significantly better graft maintenance at 10 years compared to retromolar grafts. Recipient site and age had no significant impact on graft resorption, whereas females showed more bone loss at the 10-year examination.
  
  
  CONCLUSIONS
  Lateral ridge augmentation using autogenous block grafts and guided bone regeneration demonstrated a favorable success rate of 98.1% with minimal block graft resorption of 7.7% after 10 years. Modulating factors were origin of the graft and gender.
authors.affiliation: Assistant Professor, Department of Oral Surgery and Stomatology, School of Dental Medicine, University of Bern, Switzerland.
authors.forename: Vivianne
authors.initials: V
authors.lastname: Chappuis
authors.affiliation: Research Associate, Department of Oral Surgery and Stomatology, School of Dental Medicine, University of Bern, Switzerland.
authors.forename: Yeliz
authors.initials: Y
authors.lastname: Cavusoglu
authors.affiliation: Professor, Department of Oral Surgery and Stomatology, School of Dental Medicine, University of Bern, Switzerland.
authors.forename: Daniel
authors.initials: D
authors.lastname: Buser
authors.affiliation: Professor, Department of Oral Surgery and Stomatology, School of Dental Medicine, University of Bern, Switzerland.
authors.forename: Thomas
authors.initials: T
authors.lastname: von Arx
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016301:Alveolar Bone Loss / Q000000981:diagnostic imaging / Q000601:surgery*; D000540:Alveolar Ridge Augmentation / Q000379:methods*; D001861:Bone Regeneration; D001862:Bone Resorption / Q000000981:diagnostic imaging; D016025:Bone Transplantation; D054893:Cone-Beam Computed Tomography; D003758:Dental Implantation, Endosseous / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D016557:Guided Tissue Regeneration, Periodontal; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000209:etiology; D011446:Prospective Studies; D012307:Risk Factors; D016896:Treatment Outcome
keywords: anorganic bovine bone mineral; autogenous block grafts; bone regeneration; bone remodeling; bone resorption; clinical trial; collagen membrane; cone beam computed tomography; dental implants; implant design; ridge augmentation