title: Stability of implants placed in augmented posterior mandible after alveolar osteotomy using resorbable nonceramic hydroxyapatite or intraoral autogenous bone: 12-month follow-up.
abstract: OBJECTIVE
  This prospective, controlled split-mouth study evaluated the stability of dental implants placed in the augmented mandibular areas with alveolar segmental "sandwich" osteotomies using nonceramic hydroxyapatite (ncHA) or autogenous bone.
  
  
  METHODS
  This study included 11 bilaterally partially edentulous mandibular patients in a split-mouth design. Alveolar augmentation osteotomies were performed bilaterally with interpositional ncHA graft (test group) or interpositional intraoral autogenous bone graft (control group). After 6 months of healing, four implants (two implants in each side) were placed in each patient. Forty-four implants were inserted and loaded after 6-month healing period. At 1-year follow-up, radiographic, prosthetic, and resonance frequency analysis parameters were assessed. Success criteria included absence of pain, sensitivity, suppuration, and implant mobility; absence of continuous peri-implant radiolucency; and distance between the implant shoulder and the first visible bone contact (DIB) < 2 mm.
  
  
  RESULTS
  After a 1-year loading period, the overall implant survival rate was 95.45%, with two implant losses (one of each group). Among the surviving implants (42 out of 44), two did not fulfill the success criteria; therefore, the implant success was 90.90%. DIB was 0.71 ± 0.70 and 0.84 ± 0.72 mm for ncHA and autogenous bone grafts, respectively (p > .05). Implant stability measurements were similar between the groups during the 12-month follow-up (p > .05).
  
  
  CONCLUSIONS
  Within the limits of this study, the implants placed either in sites augmented with ncHA or autogenous bone seem to represent a safe and successful procedure, at least, after 12-month follow-up.
authors.affiliation: Department of Oral Implantology, Dental Research Division, University of Guarulhos, Guarulhos, SP, Brazil.
authors.forename: Alexandre M
authors.initials: AM
authors.lastname: Dottore
authors.forename: Paulo Y
authors.initials: PY
authors.lastname: Kawakami
authors.forename: Karen
authors.initials: K
authors.lastname: Bechara
authors.forename: Jose Augusto
authors.initials: JA
authors.lastname: Rodrigues
authors.forename: Alessandra
authors.initials: A
authors.lastname: Cassoni
authors.forename: Luciene C
authors.initials: LC
authors.lastname: Figueiredo
authors.forename: Adriano
authors.initials: A
authors.lastname: Piattelli
authors.forename: Jamil Awad
authors.initials: JA
authors.lastname: Shibli
mesh_terms: D000540:Alveolar Ridge Augmentation / Q000379:methods*; D016025:Bone Transplantation; D015921:Dental Implants; D017886:Durapatite; D005500:Follow-Up Studies; D006801:Humans; D008137:Longitudinal Studies; D008334:Mandible / Q000601:surgery*; D010027:Osteotomy / Q000379:methods*; D011446:Prospective Studies
chemical_list: D015921:Dental Implants; D017886:Durapatite