title: Graftless Full-Arch Implant Rehabilitation with Interantral Implants and Immediate or Delayed Loading-Part II: Transition from the Failing Maxillary Dentition.
abstract: OBJECTIVE
  To compare long-term survival and marginal bone loss of immediate interantral implants in the nonaugmented maxilla subjected to immediate vs delayed loading.
  
  
  METHODS
  Graftless maxillary cross-arch rehabilitation was performed in a total of 362 patients in the years 2004 to 2013 (1,797 implants). Of the 240 patients with immediate implants replacing their failing maxillary dentition, 81% were subjected to immediate loading and 19% to delayed loading of their 4 to 6 interantral implants (980 and 235 implants, respectively). Kaplan-Meier survival estimates were computed and marginal bone loss was evaluated in a stratified random sample of 20 patients per group.
  
  
  RESULTS
  Thirty-one of 1,215 implants failed within the mean observation period of 3.9 years, and no difference in 8-year survival estimates could be seen between immediate (97.6% [95% CI: 96.7 to 98.6]) and delayed (96.6% [95% CI: 94.3 to 98.9]) loading protocols (P = .359). Mean marginal bone resorption following implant insertion did not differ significantly between the groups (1.5 ± 1.7 mm vs 0.7 ± 1.1 mm, P = .379); however, it was significantly associated with a reduced number of implants (P = .017) and patient history of periodontal disease (P < .001).
  
  
  CONCLUSIONS
  Immediate loading of interantral implants yields satisfactory results in the transition of patients from a failing maxillary dentition to full-arch implant rehabilitation and thus may be favored over delayed loading concepts.
authors.forename: Dieter
authors.initials: D
authors.lastname: Busenlechner
authors.forename: Georg
authors.initials: G
authors.lastname: Mailath-Pokorny
authors.forename: Robert
authors.initials: R
authors.lastname: Haas
authors.forename: Rudolf
authors.initials: R
authors.lastname: Fürhauser
authors.forename: Carina
authors.initials: C
authors.lastname: Eder
authors.forename: Bernhard
authors.initials: B
authors.lastname: Pommer
authors.forename: Georg
authors.initials: G
authors.lastname: Watzek
mesh_terms: D000328:Adult; D000368:Aged; D016301:Alveolar Bone Loss / Q000473:pathology; D003724:Dental Arch / Q000601:surgery*; D003758:Dental Implantation, Endosseous / Q000379:methods*; D015921:Dental Implants; D019094:Dental Prosthesis, Implant-Supported; D019232:Dental Restoration Failure; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D057893:Immediate Dental Implant Loading / Q000379:methods*; D053208:Kaplan-Meier Estimate; D008297:Male; D008437:Maxilla / Q000601:surgery; D008875:Middle Aged; D017060:Patient Satisfaction; D016388:Tooth Loss / Q000534:rehabilitation*; D019415:Torque
chemical_list: D015921:Dental Implants