MISADAPTATION OF THE DENTAL CROWN AND ORAL REHABILITATION STRATEGIES: CASE REPORT

Abstract

The marginal adaptation of dental crowns is a determining factor for the clinical success of prosthetic rehabilitations. Misfits can result in bacterial infiltration, development of secondary caries, periodontal inflammation and structural failures that compromise the longevity of the restoration. In this context, this study aims to report a clinical case of a misfit crown, highlighting the challenges, risks involved and solutions adopted for the aesthetic and functional rehabilitation of the dental unit. The clinical case addresses the replacement of a misfit crown that presented failures in both marginal adaptation and aesthetics. Clinical and radiographic examinations were performed to assess the extent of structural and periodontal impairment. Based on the findings, a multidisciplinary approach was planned involving removal of the defective crown, adaptation of the dental preparation, reconstruction with a fiberglass post and cementation of a new ceramic crown. The literature review reinforces the importance of ideal marginal adaptation, which should remain within acceptable clinical limits to minimize risks of infiltration and biomechanical failures. Furthermore, the role of biological space and the need for interventions such as clinical crown lengthening when the remaining tooth structure is compromised are highlighted. The results demonstrated a significant improvement in the patient's prosthetic adaptation, aesthetics and masticatory function, highlighting the importance of careful planning and the use of appropriate materials and techniques. The study reinforces that a multidisciplinary approach is essential for the success of prosthetic rehabilitation and for maintaining oral health in the long term.