title: Conventional multi-slice computed tomography (CT) and cone-beam CT (CBCT) for computer-aided implant placement. Part II: reliability of mucosa-supported stereolithographic guides.
abstract: OBJECTIVE
  Deviations of implants that were placed by conventional computed tomography (CT)- or cone beam CT (CBCT)-derived mucosa-supported stereolithographic (SLA) surgical guides were analyzed in this study.
  
  
  METHODS
  Eleven patients were randomly scanned by a multi-slice CT (CT group) or a CBCT scanner (CBCT group). A total of 108 implants were planned on the software and placed using SLA guides. A new CT or CBCT scan was obtained and merged with the planning data to identify the deviations between the planned and placed implants. Results were analyzed by Mann-Whitney U test and multiple regressions (p < .05).
  
  
  RESULTS
  Mean angular and linear deviations in the CT group were 3.30° (SD 0.36), and 0.75 (SD 0.32) and 0.80 mm (SD 0.35) at the implant shoulder and tip, respectively. In the CBCT group, mean angular and linear deviations were 3.47° (SD 0.37), and 0.81 (SD 0.32) and 0.87 mm (SD 0.32) at the implant shoulder and tip, respectively. No statistically significant differences were detected between the CT and CBCT groups (p = .169 and p = .551, p = .113 for angular and linear deviations, respectively).
  
  
  CONCLUSIONS
  Implant placement via CT- or CBCT-derived mucosa-supported SLA guides yielded similar deviation values. Results should be confirmed on alternative CBCT scanners.
authors.affiliation: Research fellow, Department of Oral Implantology, Faculty of Dentistry, Istanbul University, Istanbul, Turkey; professor, Department of Oral Implantology, Faculty of Dentistry, Istanbul University, Istanbul, Turkey; assistant professor, Department of Prosthodontics, Gülhane Military Medical Academy (GATA), Center of Dental Sciences, Ankara, Turkey; professor, Department of Oral Implantology, Faculty of Dentistry, Istanbul University, Istanbul, Turkey.
authors.forename: Volkan
authors.initials: V
authors.lastname: Arisan
authors.forename: Zihni Cüneyt
authors.initials: ZC
authors.lastname: Karabuda
authors.forename: Bülent
authors.initials: B
authors.lastname: Pişkin
authors.forename: Tayfun
authors.initials: T
authors.lastname: Özdemir
mesh_terms: D000848:Anodontia / Q000601:surgery*; D054893:Cone-Beam Computed Tomography / Q000379:methods*; D015921:Dental Implants; D006801:Humans; D009061:Mouth Mucosa; D013813:Therapy, Computer-Assisted; D014057:Tomography, X-Ray Computed / Q000379:methods*
chemical_list: D015921:Dental Implants