ASSESSMENT OF INTERNAL FIT OF CUSTOM-MADE POSTS FABRICATED BY OPTICAL IMPRESSION (AN IN-VITRO STUDY)

Document Type : Original Article

Authors

1 Fixed prosthodontics department, Faculty of dentistry, Cairo university, Egypt

2 Fixed prosthodontics department, Faculty of Dentistry, Cairo University, Egypt

Abstract

Aim: The aim of the study was to compare the internal fit of custom-made post fabricated by direct scanning of post space with indirect technique (Addition silicon).
Methodology: Twenty single rooted teeth were endodontically treated and prepared to depth 12 mm for receiving post and core restorations. The specimens were randomized into two equal groups: CAD/CAM PEEK post and core restorations for group I, were obtained by direct scanning intracanal. For group II polyvinylsiloxane impressions of the post space were scanned. Post and core restorations were milled and cemented on their respective teeth. All the twenty specimens were then sectioned horizontally, and the cement thickness was evaluated using a steromicroscope.
Results: The CAD/CAM post and core restoration fabricated by the direct scan approach had the least cement thickness and attained higher adaptation in comparison with conventional impression scanning technique within non-significant range.
Conclusions: Within the limitations of this study; CAD/CAM scanning methods to post fabricated from Polyetheretherketone, presented adequate internal adaptation to root canal within the accepted clinical range. Direct scanning is considered as an alternative to the conventional impression in fabrication of PEEK post and core restorations.

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