title: Clinical and radiological evaluation of a template-guided (NobelGuide™) treatment concept.
abstract: OBJECTIVE
  The study was designed to evaluate the clinical use of the NobelGuide(™) concept over a follow-up period of 12 months with respect to implant success and survival rates, development of soft tissue condition and recording of potential surgical and prosthetic complications. In addition, radiological assessment of peri-implant bone levels was performed at the 1-year follow-up post-implant placement.
  
  
  METHODS
  Thirty patients (male/female = 15/15) with partially dentate and edentulous mandibles and maxillae were included. All patients were planned and operated on using the computer-aided, template-guided treatment concept NobelGuide(™). Overall, 163 implants (NobelReplace(®) Tapered Groovy) were placed (mandible/maxilla = 107/56 implants). Recall appointments were performed after 1-2 weeks, 1, 3, 6 and 12 months after implant placement. Clinical parameters of the soft tissue conditions [e.g. bleeding on probing (BoP), pocket probing depth ≥3 mm (PPD), marginal plaque index (mPI)] and the dentist's esthetic and functional evaluation using a visual analogue scale (VAS) were documented. Marginal bone level was evaluated on radiographs made at implant insertion and at the 1-year follow-up.
  
  
  RESULTS
  All 30 patients with 161 implants completed the 1-year follow-up resulting in a cumulative survival rate of 98.8% (two implant losses). Clinical parameters improved in a majority of the implants. The mean marginal bone level at implant insertion and at 1-year follow-up was reported with 0.17 mm (SD 1.24; n = 125) and -1.39 mm (SD 1.27; n = 110), respectively. The mean change in bone level from implant insertion to 1 year was -1.44 mm (SD 1.35; n = 98).
  
  
  CONCLUSIONS
  The 1-year follow-up showed a cumulative survival rate and success rate of 98.8% and 96.3%, respectively. Immediate or delayed loading of implants using a flapless, guided surgery approach (NobelGuide(™)) appears to be a viable concept demonstrating good clinical and radiographic outcomes at the 1-year time point.
authors.affiliation: Department of Oral Surgery, Bernhard Gottlieb Dental School, Medical University of Vienna, Vienna, Austria.
authors.forename: Christoph
authors.initials: C
authors.lastname: Vasak
authors.forename: Ralf J
authors.initials: RJ
authors.lastname: Kohal
authors.forename: Stefan
authors.initials: S
authors.lastname: Lettner
authors.forename: Dennis
authors.initials: D
authors.lastname: Rohner
authors.forename: Werner
authors.initials: W
authors.lastname: Zechner
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D017076:Computer-Aided Design; D017267:Dental Prosthesis Design; D019232:Dental Restoration Failure; D004954:Esthetics; D005260:Female; D006801:Humans; D057893:Immediate Dental Implant Loading / Q000295:instrumentation / Q000379:methods*; D007575:Jaw, Edentulous / Q000534:rehabilitation*; D007576:Jaw, Edentulous, Partially / Q000534:rehabilitation*; D008297:Male; D008875:Middle Aged; D010512:Periodontal Index; D025321:Surgery, Computer-Assisted; D016896:Treatment Outcome