title: A long-term retrospective study of two different implant surfaces placed after reconstruction of the severely resorbed maxilla using Le Fort I osteotomy and interpositional bone grafting.
abstract: OBJECTIVE
  In this retrospective study, the long-term survival and success rates of implants with 2 different surfaces placed in extremely atrophic maxillae augmented with Le Fort I osteotomy and interpositional bone grafts were assessed.
  
  
  METHODS
  In 12 consecutive patients (7 female, 5 male; average age, 55 years; age range, 47 to 63 years), the resorbed maxilla was reconstructed using Le Fort I osteotomy in combination with interpositional iliac bone grafts. After 5 to 6 months, machined or titanium plasma-sprayed implants were inserted. The patients were followed clinically and radiographically for 6 to 12 years (mean 102 +/- 24.42 months) after prosthetic loading. Implant outcome in terms of survival and success using Albrektsson's criteria was analyzed.
  
  
  RESULTS
  In all cases, the bone-grafting procedures allowed implant placement. Of the 104 implants placed (53 machined and 51 titanium plasma-sprayed), 11 failed, resulting in an overall cumulative survival rate of 89.4%. When the success rate was calculated using the defined criteria, the cumulative success rate was 67.3%. The respective survival and success rates were 86.8% and 66.0% for the machined implants and 92.2% and 68.7% for the titanium plasma-sprayed implants. The mean marginal bone resorption was 2.91 +/- 0.77 mm (range, 0.6 to 4.9 mm) around machined implants and 2.72 +/- 0.84 mm (range, 0.7 to 5.3 mm) around titanium plasma-sprayed implants. No significant differences in survival, success rate, or marginal bone resorption were found between the 2 implant groups.
  
  
  CONCLUSIONS
  Le Fort I osteotomy combined with bone grafts and delayed implant placement gave predictable long-term results. There was a distinct relationship between implant survival and the long-term success rate. The implant surface had no significant effect on the survival, success rate, or marginal bone resorption.
authors.affiliation: Department of Oral and Maxillofacial Surgery, School of Dentistry, University of Bologna, Italy. claudio.marchetti@unibo.it
authors.forename: Claudio
authors.initials: C
authors.lastname: Marchetti
authors.forename: Francesco
authors.initials: F
authors.lastname: Pieri
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Corinaldesi
authors.forename: Marco
authors.initials: M
authors.lastname: Degidi
mesh_terms: D016301:Alveolar Bone Loss / Q000209:etiology; D000540:Alveolar Ridge Augmentation / Q000379:methods*; D016025:Bone Transplantation; D020099:Coated Materials, Biocompatible; D003758:Dental Implantation, Endosseous / Q000009:adverse effects; D015921:Dental Implants / Q000009:adverse effects; D003775:Dental Polishing; D017267:Dental Prosthesis Design; D019232:Dental Restoration Failure; D005260:Female; D006801:Humans; D053208:Kaplan-Meier Estimate; D015993:Life Tables; D008297:Male; D008437:Maxilla / Q000601:surgery*; D008875:Middle Aged; D019340:Osteotomy, Le Fort; D012189:Retrospective Studies; D013499:Surface Properties; D014025:Titanium
chemical_list: D020099:Coated Materials, Biocompatible; D015921:Dental Implants; C009495:titanium dioxide; D014025:Titanium