The assessment of the precision (marginal and internal) of 3D printing and milled interim crowns.

Document Type : Original Article

Authors

1 Lecturer, Fixed Prosthodontics Department, Faculty of Dentistry, Beni-Suef University

2 Assistant Professor, Oral Maxillofacial Surgery Department, Faculty of Dentistry Fayoum University

3 Assistant Professor, Fixed Prosthodontics Department, Faculty of Dentistry, Fayoum University

Abstract

OBJECTIVE: This study aims to assess the precision (marginal and internal) of 3D printing and milled interim crowns.
METHODS: a study model of all ceramic preparation for the maxillary first molar was fabricated. Interim crowns were fabricated using milling systems (imes-icore 250i , n = 10 ) and 3D printing ( Rapidshape D30 , n = 10 ).The marginal misfit and Internal gap were assesed using the replica technique. All the achieved data was analyzed with Shapiro-wilk’s test which was followed by independent t-test.
Results: The smallest discrepancy of 63.30±13.27 μm was observed in marginal misfit of the Printing group followed by milled group with the gap of 121.94±1.53 μm. The marginal misfit and internal gap showed a significant difference between the two groups, it has been observed that the 3D Printing technology has the capability to fabricate an interim crown with better precision fit than milling one.
CONCLUSIONS: Interim crowns that is constructed by 3D printing technology have better precision ( marginal and internal ) compared to milled one.

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Egyptian Dental Journal
Volume 69, Issue 1 - Serial Number 4
January (Fixed Prosthodontics, Removable Prosthodontics and Dental Materials)
January 2023
Pages 603-610

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