A novel evaluation method for optical integration of Class IV composite restorations

作者：Dietschi D; Abdelaziz M; Krejci I; Di Bella E; Ardu S^*

来源：Australian Dental Journal, 2012, 57(4): 446-452.

DOI：10.1111/adj.12001

• Anterior composite restorations
• Class IV
• colour integration
• spectrophotometry
• L*a*b*

Background: This aim of this study was to compare traditional visual appreciation with spectrophotometry to evaluate the optical integration of anterior composite restorations. Methods: Eleven restorations were evaluated in eight patients receiving dental treatment at fourth and fifth year student clinics at the dental school of the University of Geneva, Switzerland. Colour integration of completed restorations was assessed by visual observation according to USPHS criteria and spectrophotometric analysis; both methods were then compared. Results: A mean E of 1.1 (range 0.7 to 1.7) corresponded to an optimal visual integration between natural tooth and restoration (alpha score) while a mean E of 3.3 (range 2.6 to 3.8) corresponded to clinically non-acceptable visual integration (charlie score). Restorations scored as bravo, corresponded to a suboptimal but not disturbing visual integration, had a mean E of 2. L* and b* values present at the bevel area and into the composite bulk tended to be lower than that of the natural tooth while a* composite values were slightly higher. Conclusions: The spectrophotometric method employed in this pilot study has confirmed the published range of E (global difference of L*a*b* values) corresponding to clinically optimal, acceptable and unacceptable colour integration.

• 出版日期2012-12