title: Non-Radiological Method for Fabrication of a Screw-Channel Drilling Guide in Cement-Retained Implant Restorations Using Intraoral Digital Scanning and Imaging Superimposition: A Clinical Report.
abstract: The difficulty of retrieving the abutment screw is a major disadvantage of cement-retained implant restorations. Conventional methods for locating the screw-access hole are based largely on radiography or manual labor, which limits accuracy and clinical feasibility. This clinical report describes a non-radiological method for fabricating an accurate drilling guide for location of the screw channel using intraoral optical scanning, 3D superimposition, and computer-aided design and computer-aided manufacturing (CAD/CAM) technologies. The present technique not only improves the guide fabrication process and the accuracy of screw-channel drilling, but also has wide indications for implant restorations.
authors.affiliation: Department of Prosthodontics, School of Dentistry, A3DI, Kyungpook National University, Daegu, Korea.
authors.forename: Hang-Nga
authors.initials: HN
authors.lastname: Mai
authors.affiliation: Dental Technician, Kyungpook National University Hospital, Daegu, Korea.
authors.forename: Kyung-Rok
authors.initials: KR
authors.lastname: Kim
authors.affiliation: Department of Prosthodontics, School of Dentistry, A3DI, Kyungpook National University, Daegu, Korea.
authors.forename: Du-Hyeong
authors.initials: DH
authors.lastname: Lee
mesh_terms: D001863:Bone Screws; D002484:Cementation; D017076:Computer-Aided Design; D003757:Dental Implantation / Q000295:instrumentation*; D015921:Dental Implants; D019094:Dental Prosthesis, Implant-Supported; D006801:Humans; D007091:Image Processing, Computer-Assisted; D021621:Imaging, Three-Dimensional; D055815:Young Adult
chemical_list: D015921:Dental Implants
keywords: Intraoral optical scanning; cement-retained implant restoration; screw-channel drilling guide; superimposition