title: The Effect of a CAD/CAM-Guided Template on Formation of the Screw-Access Channel for Fixed Prostheses Supported by Lingually Placed Implants.
abstract: OBJECTIVE
  The aim of this study was to evaluate the effect of a computer-aided design/computer-assisted manufacturing (CAD/CAM) guide on drilling the screw-access channel for lingually placed implants.
  
  
  METHODS
  Screw-channel drilling guides were fabricated on lingually placed implant models using CAD/CAM technology. The screw channels were prepared with guided or freehand drilling by 20 dental graduates. The accuracy of each screw channel was assessed for drilling entry point, channel volume, and angulation (α = .05).
  
  
  RESULTS
  The guided drilling group showed smaller deviations than the freehand drilling group, and prosthesis position influenced the guide effect (P < .001).
  
  
  CONCLUSIONS
  The CAD/CAM guide facilitated the screw channel preparation of cement-retained prostheses supported by lingually placed implants.
authors.forename: Du-Hyeong
authors.initials: DH
authors.lastname: Lee
authors.forename: Lin-Jie
authors.initials: LJ
authors.lastname: Li
authors.forename: Hang Nga
authors.initials: HN
authors.lastname: Mai
authors.forename: Kyung-Rok
authors.initials: KR
authors.lastname: Kim
authors.forename: Keun-Woo
authors.initials: KW
authors.lastname: Lee
mesh_terms: D001863:Bone Screws; D017076:Computer-Aided Design; D003761:Dental Impression Technique; D017267:Dental Prosthesis Design; D019094:Dental Prosthesis, Implant-Supported; D003834:Denture Precision Attachment; D003830:Denture, Partial, Fixed; D006801:Humans; D055114:X-Ray Microtomography