Evaluation of Color Stability of Temporary Crown and Bridge Materials against External Staining: A Comparative In vitro Study

Abstract

Abstract Background: Temporary restorations are essential part of fixed prosthodontic treatment as they function to protect the abutment tooth during the fabrication of final prosthesis. Objectives: The objective of the study was (i) to assess color stability of three temporary crown and bridge restorative materials toward external staining due to commonly consumed beverages and also at different time intervals of 1, 3, and 5 weeks and (ii) To assess the discoloration effect of different staining agents on the three temporary crown and bridge materials. Materials and Methods: Protemp4, Accutemp, and Oratemp, commercially available temporary crown and bridge restorative materials, were assessed after immersion into the staining solutions such as coffee, cold beverage (Coke), chlorhexidene mouthwash, turmeric solution, and synthetic saliva for 1, 3, and 5 weeks. The color measurement was performed using an NS 810 spectrophotometer, which is in accordance with the International Commission on Illumination. The statistical analysis used was analysis of variance test, Bonferroni test, post hoc correction, and Tukey’s test. Results: It was observed that the factors which significantly affected color stability included the constitution of provisional material, type, and exposure time of the staining solution. Oratemp manifested maximum discoloration, whereas Accutemp manifested the least discoloration on exposure to staining solutions for 5 weeks. Turmeric solution had the most remarkable color change on all types of temporary crown and bridge materials. Conclusion: Accutemp could be preferred for long-term provisional restorations, whereas Protemp4 and Oratemp can be given for a shorter time period.