Comprehensive Esthetic Rehabilitation of a Subgingival Crown-en-Mass Fracture of Maxillary Lateral Incisor Using Diode Laser Crown Lengthening and Fragment Reattachment: A Case Report

Abstract Crown-en-mass fractures of maxillary anterior teeth, especially lateral incisors, are commonly seen in adolescents following traumatic dental injuries. Due to their forward anatomical position in the maxillary arch. When such fractures extend subgingivally, they pose a clinical challenge due to biologic width violation and the demand for esthetic rehabilitation. Conservative options that preserve tooth structure and periodontal health have gained significance with the advent of adhesive dentistry, laser-assisted crown lengthening, and fiber post systems. This case report describes the conservative and esthetic management of a crown-en-mass fracture in a 15-year-old boy’s maxillary left lateral incisor. A diode laser was used for precise crown lengthening to expose the fracture margin without compromising periodontal health. Endodontic treatment was followed by placement of a fiber-reinforced post, and the natural fragment was adhesively reattached using dual-cure composite. At 6-month follow-up, the tooth exhibited excellent esthetic integration, function, and periodontal stability. This case highlights the effectiveness of a multidisciplinary, minimally invasive approach for the esthetic rehabilitation of complex anterior fractures.