title: Simultaneous implant placement and bone grafting with particulate mineralized allograft in sites with buccal wall defects, a three-year follow-up and review of literature.
abstract: OBJECTIVE
  To assess the relationship between the vertical buccal defect size and the outcome of single-stage (non-submerged) implant placement and simultaneously augmentation of sites with mineralized particulate allograft (Puros Cancellous) using collagen membranes (Ossix Plus).
  
  
  METHODS
  Records of 108 partially edentulous patients with localized, buccal bone defects in the posterior maxilla and/or mandible [156 tissue-level Straumann implants, 38 male, 70 female, average age = 46.7 (6.4) years] were used for this study. Sectional CBCT scans were used to evaluate ridge forms before implant placement and after bone grafting (36 ± 2.2 months). The initial vertical buccal wall defect was recorded by measuring the amount of vertical Implant Platform's Rough Surface Exposure (IPRSE) when implants were placed [small (<3 mm), medium (3-5 mm), and large (>5 mm)]. The ridge contour at 36 (±2.2) months was classified into 3 categories [completely corrected (no IPRSE seen on CBCT), partially improved (some IPRSE seen on CBCT), no difference/worse].
  
  
  RESULTS
  Complete defect correction occurred in 66 (61.1%) patients followed by improved ridge contours in 38 patients. Significant differences were observed in the outcome of simultaneous grafting of sites with different pre-treatment vertical defect sizes (chi-square = 69.394, df = 4, P < 0.001). Two graft failures (one needed regrafting) and 2 implant failures were also seen. Treatment was effective in complete correction of 100% and 79.3% of small and medium-sized vertical defects, respectively. Large-sized defects showed only partial improvement in 90% of cases, without any complete correction. Cumulative implant and graft survival was 98.1%.
  
  
  CONCLUSIONS
  Single-stage implant placement and simultaneous grafting with mineralized particulate allograft showed promising outcome in correcting small and medium sized vertical buccal wall bone defects (<5 mm).
authors: Department of Oral and Maxillofacial Surgery, School of Dentistry, University of Southern California, Los Angeles, CA, USA. Electronic address: leb97201@yahoo.com.
authors: Bach T
authors: BT
authors: Le
authors: Orthodontics, Warwick Dentistry, Warwick Medical School, University of Warwick, Coventry, UK. Electronic address: faraortho@yahoo.com.
authors: Ali
authors: A
authors: Borzabadi-Farahani
mesh_terms: D064591:Allografts / Q000637:transplantation*; D016301:Alveolar Bone Loss / Q000601:surgery*; D000539:Alveolar Process / Q000473:pathology; D000540:Alveolar Ridge Augmentation / Q000379:methods; D016025:Bone Transplantation / Q000379:methods*; D003094:Collagen; D054893:Cone-Beam Computed Tomography / Q000379:methods; D003758:Dental Implantation, Endosseous / Q000379:methods*; D019232:Dental Restoration Failure; D005260:Female; D005500:Follow-Up Studies; D006085:Graft Survival; D006801:Humans; D007576:Jaw, Edentulous, Partially / Q000534:rehabilitation / Q000601:surgery; D008297:Male; D008334:Mandible / Q000473:pathology / Q000601:surgery; D008437:Maxilla / Q000473:pathology / Q000601:surgery; D008567:Membranes, Artificial; D008875:Middle Aged; D013524:Surgical Flaps / Q000601:surgery; D013529:Surgical Wound Dehiscence / Q000209:etiology; D016896:Treatment Outcome
chemical_list: D008567:Membranes, Artificial; D003094:Collagen
keywords: Non-submerged implant placement; Particulate mineralized allograft; Resorbable collagen membrane; Ridge buccal vertical defect