Resin Wing Technique With Sandblasting Interface Modification: A 24-Month Stable Pulp Preservation in Young Permanent Teeth With Complex Crown Fractures.

Background: Dental trauma, especially crown fractures of the maxillary anterior teeth, has a very high incidence. Conventional methods for repairing crown fractures of anterior teeth include direct resin restoration, veneers, crown restoration, and crown fragment reattachment. This case report details the treatment process of pulp preservation and the use of resin wing technique for crown fragment reattachment in a young patient with a secondary complex crown fracture of the maxillary anterior teeth. Case Description: In this case report, the author detailed the treatment process of a young patient with secondary complex crown fractures on the upper anterior teeth. During the first treatment for crown fracture, pulpotomy and crown fragment reattachment were performed on the damaged tooth. In the second treatment for crown fracture, the bonding interface was roughened using sandblasting technology, and the fractured tooth fragment was precisely reattached using the resin wing method. After 24 months of follow-up observation, the treatment effect remained stable. Conclusion: Pulp preservation combined with fragment reattachment represents an optimal approach for managing complex crown fractures in young permanent teeth. The resin wing technique improved repositioning precision and reduced technical sensitivity, enabling efficient case completion. Nevertheless, case selection-considering factors such as functional support of adjacent teeth-is critical for technique applicability.