title: Immediate restoration of single-tooth implants in mandibular molar sites: a 12-month preliminary report.
abstract: OBJECTIVE
  The aim of this prospective clinical study was to evaluate the survival rates at 12 months of transmucosal implants placed in the posterior mandible and immediately restored with single crowns.
  
  
  METHODS
  Thirty ITI dental implants with sandblasted, acid-etched surfaces were placed in 30 patients missing at least 1 mandibular molar and immediately restored if acceptable primary stability was attained. Primary stability was measured with resonance frequency analysis (RFA) using the Osstell device, and only implants with a stability quotient greater than 62 were included in the study. RFA measurement and radiographic assessment were made at baseline and 6 months after implant placement. Plaque Index, Bleeding Index, probing depth, attachment level, and width of keratinized tissue were measured at the 12 month follow-up examination.
  
  
  RESULTS
  At 12 months, only 1 implant had been lost; it was removed because of acute infection. Radiographic as well as clinical examination confirmed osseointegration of all implants, with a survival rate of 96.7%.
  
  
  CONCLUSIONS
  Interestingly, implant stability as measured using RFA did not increase significantly from baseline to 12 months (P > .05).
  
  
  CONCLUSIONS
  The present study showed that immediate restoration of transmucosal implants placed in the mandibular area with good primary stability can be a safe and successful procedure. However, larger, long-term clinical trials are needed to confirm the present results.
authors.affiliation: University of Genoa, Italy. rcornel@libero.it
authors.forename: Roberto
authors.initials: R
authors.lastname: Cornelini
authors.forename: Filippo
authors.initials: F
authors.lastname: Cangini
authors.forename: Ugo
authors.initials: U
authors.lastname: Covani
authors.forename: Antonio
authors.initials: A
authors.lastname: Barone
authors.forename: Daniel
authors.initials: D
authors.lastname: Buser
mesh_terms: D000328:Adult; D003442:Crowns; D003758:Dental Implantation, Endosseous / Q000379:methods*; D019250:Dental Implants, Single-Tooth; D017268:Dental Prosthesis Retention / Q000295:instrumentation; D019094:Dental Prosthesis, Implant-Supported; D019232:Dental Restoration Failure; D003799:Dental Stress Analysis; D005260:Female; D006801:Humans; D008297:Male; D008334:Mandible; D008875:Middle Aged; D008963:Molar; D010512:Periodontal Index; D014732:Vibration