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Volume 29 , Issue 4
July/August 2016

Pages 406408

Double-Step Image Superimposition Technique for Fabricating a Drilling Guide to Access the Abutment Screw in Implant Prostheses

Hang-Nga Mai, DDS, MSc/Kyung-Rok Kim, BSc/Du-Hyeong Lee, DDS, MSc

PMID: 27479352
DOI: 10.11607/ijp.4771

Limited retrievability is a major disadvantage of cement-retained implant restorations. Despite great progress in locating the abutment screw within crowns, the existing techniques are based on prior data or prefabricated devices and require significant work. This study introduces a new procedure for fabricating a guide template to drill a screw access hole using a double-step superimposition technique that incorporates intraoral optical scanning, cone beam computed tomography, and dental design software. The double-step superimposition technique with computer-aided design/computer-assisted manufacturing technology can enhance the convenience and accuracy of drilling the screw-access hole.

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