Clinical Performance of Newly Developed Android Mobile Digital Application on Tooth Shade Reproduction: A Multicenter Randomized Controlled Clinical Trial.

Aim: This study aimed to determine the clinical effectiveness of android mobile digital application shade matching on tooth shade reproduction.

Setting and design: This was a double-blind randomized controlled clinical trial (REF/2021/03/042258).

Materials and methods: Thirty participants were selected from the two dental centers. The participant who required full-coverage restorations in one of the central incisors with adjacent central incisor untouched was the main inclusion criteria. Three metal-ceramic or all-ceramic crowns were fabricated with reference shades from Vita Three-Dimensional (3D) Master shade guide, Vita Easyshade spectrophotometer, and mobile application for each participant. ΔE values between reference maxillary central incisor and metal-ceramic and all-ceramic crowns were measured for each participant. In addition, two operators and participants observed the clinical agreement between for each crown on a visual analog scale.

Statistical analysis used: ANOVA statistics and Turkey's post hoc test were used for ΔE value. Kappa statistics was used for clinical agreement.

Results: Mean ΔE value of fabricated metal-ceramic and all-ceramic crowns and reference maxillary central incisor of Vita 3D Master shade guide was significantly higher than Vita Easyshade spectrophotometer and mobile digital application (P = 0.004). However, ΔE values of Vita Easyshade and mobile digital application were contiguous. However, ΔE value of Vita 3D Master was lower than clinically acceptable value of intraoral color difference. Kappa value figured moderate agreement for Vita Easyshade and mobile digital application and slight to no agreement for Vita 3D Master.

Conclusion: Within the limitations of the study, the Android mobile digital application can turn up as a reliable method for shade selection.