The Feasibility of CAD-CAM Pre-Operatively Fabricated Provisional Prostheses in Tooth-Bound Edentulous Ridges Restored with Dental Implants – A Pilot Study

Research output: ThesisNon-UWA Thesis

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Abstract

Purpose
The aim of this pilot study was to examine the clinical feasibility of pre-operatively fabricated provisional prostheses for tooth-bound edentulous sections using data from cone-beam computerized tomography, intra-oral surface scan and computer-aided design/computer-aided manufacturing technology in an open system.

Material and Methods
Thirteen patients were included. Their cone-beam computerized tomographic images were obtained with iCAT Flex Imaging System and and their intraoral surface scans with Trios scanner. The data from these two sources were then merged; the volumetric topography of patients’ intraoral soft and hard tissues was constructed and prosthesis/implant planning was performed using Trios Implant Planning Studio. From these plans, fully computer guided surgical templates and screw-retained provisional prostheses were manufactured before implant placements using computer–aided design/computer–aided manufacturing process. NobelBiocare Replace Conical Connection implants were placed fully guided, the prostheses were inserted and these temporaries were evaluated based on their fit on the implants, contours, proximal contacts, occlusal contacts, time spent for adjustments, implant integration and complications.

Results
Data showed single temporary crowns could well be considered feasible while bridges showed multiple problems including extensive adjusting time, abutment – bridges detach and fracture.

Conclusion
The most significant issue for single implant crowns was their axial alignment with adjacent teeth and this issue could be overcome by using axial index on the surgical templates to rotate the implants to precise position on insertion. Using an open platform, practitioners could employ this digital pathway without possessing expensive data acquisition and implant planning devices.
Original languageEnglish
QualificationMasters
Awarding Institution
  • Goethe University Frankfurt
Supervisors/Advisors
  • Nguyen, Vinh, Supervisor, External person
DOIs
Publication statusPublished - 2018

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