Clinical and Radiographic Success of Resin-bonded Strip Crowns in Primary Incisors with Varying Extents of Sound Tooth Structure Available for Bonding

CONTEXT: First-time dental treatment for children is often sought due to carious, malformed, fractured, and discolored teeth. The strip crown represents a highly esthetic and popular option for the restoration of primary anterior teeth. However, there are limited data on the clinical success of these crowns based on the extent of surface area used for adhesion. AIMS, SETTINGS AND DESIGN: This in vivo study aimed to assess the clinical, radiographic, and photographic performance of 66 composite strip crown restorations on primary anterior teeth for up to 15 months and compare the outcome based on the extent and surface area of tooth structure available. MATERIALS AND METHODS: The amount of surface area available in each group after removal of affected enamel was evaluated through 3D scanning of study casts and digital measurements. The teeth were thus grouped into three categories: group I with crown structure involvement up to the incisal one-third, group II with involvement up to the middle of the middle third, and group III with involvement up to the cervical one-third. STATISTICAL ANALYSIS USED: Kruskal–Wallis H test and Mann–Whitney U test were used for computation of mean scores for intra- and intergroup comparison, respectively. Scoring was done as per FDI clinical criteria on a scale of 1 to 5. RESULTS: Group III showed the highest mean scores at different time intervals and also the highest failure rate (52.38%), followed by group II (12%) and group I (5%). The overall retention rate observed for the strip crowns was 77.28% at the end of 15 months. CONCLUSION: Strip crowns should be considered for teeth that offer a minimum of half to two-thirds of the healthy tooth structure remaining. Further, longitudinal studies are required to add to the results of the final outcome of these restorations. KEY MESSAGES: A critical surface area value of <50 mm(2) or less than half of the available sound tooth structure was found to be detrimental to the retention rate of these crowns in this study. It could therefore be suggested to consider strip crowns for teeth that offer a minimum of half to two-thirds of healthy tooth structure remaining. HOW TO CITE THIS ARTICLE: Grewal N, Jha S, Kaur N. Clinical and Radiographic Success of Resin-bonded Strip Crowns in Primary Incisors with Varying Extents of Sound Tooth Structure Available for Bonding. Int J Clin Pediatr Dent 2021;14(4):454–461.