COMPARISON OF THE INTRAORAL SCANNER AND VISUAL SHADE MATCH ACCURACY IN SHADE DETERMINATION (CLINICAL STUDY)

Document Type : Original Article

Authors

1 Fixed prosthodontic dep at faculty of dentistry

2 Conservative Dentistry Department, Faculty of Dentistry, Alexandria University

3 Fixed prosthodontic , conservative Dentistry Department,Faculty of Dentistry,Alexandria University

Abstract

Introduction: Currently, digital intraoral scanners (IOS) and visual shade guides can accurately evaluate the exact color of natural teeth.
Objective: This clinical trial utilized a randomized, double-blinded, controlled cross-over design to evaluate the accuracy of shade matching, and compare the Medit i700 IOS with visual shade determination.
The study selected 44 teeth from participants who had at least one healthy and undamaged maxillary central incisor based on a 5% alpha error and 80% study power.
A proficient examiner utilized a 3D-Master shade guide to ascertain the hue of the middle section of the upper central incisor. The Medit i700 accurately captured images of the maxillary anterior teeth, following the guidelines provided by the manufacturer. The software of the scanner will utilize on-screen tools to choose shades. The most suitable hue was determined, and the E00 value was calculated to assess the extent of color variation in each experimental group.
Results: The 3D-Master shade guide displayed a visually noticeable color difference (DE>3.7) of 34.1%; however, the Medit i700 revealed a color difference of 61.4%. The P value ( 0.080) showed no significant difference between the 3D-Master shade guide and Medit i700. The median of triangle E was determined to be 3.86 for the Medit I 700 IOS and 0.00 for the visual shade 3D-Master. The P value (0.548) showed no difference between the 3D-Master shade guide and Medit i700.
Conclusion: The Medit i700's precision in tooth shade was considered in comparison to the visual shade made using the 3D-master shade guide.

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Alexandria Dental Journal
Volume 50, Issue 2
B (Endodontics, Prosthodontics, Fixed prosthodontics, Conservative dentistry, Dental Biomaterials)
August 2025
Pages 181-186

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