Non-surgical prosthetic rehabilitation using a double-crown overdenture in a young adult with multiple ankylosed and impacted teeth: an 8-year follow-up case report

Managing multiple ankylosed or impacted teeth in young patients is particularly challenging, as orthodontic or surgical options often fail or are contraindicated before skeletal maturity. When orthodontic and surgical interventions are no longer feasible, prosthetic rehabilitation may provide a conservative treatment option for restoring function and esthetics during the transition to adulthood. An adolescent male presented with multiple ankylosed and impacted teeth. Orthodontic traction and surgical exposure attempts had been unsuccessful due to extensive ankylosis. To restore oral function and esthetics without surgical intervention, a double-crown overdenture was fabricated during early adulthood. Zirconia and polyetheretherketone (PEEK)-based polymers were selected for the primary and secondary crowns based on their favorable material properties and suitability for the planned prosthetic design. The patient reported improved comfort and masticatory function, and clinical examinations demonstrated stable occlusion and satisfactory prosthesis adaptation throughout the follow-up period. All eight definitive abutment teeth remained functional throughout the 8-year follow-up (8/8; 100% survival). Two episodes of primary crown recementation, one veneering repair, one denture base relining, and several minor sore spot adjustments were required, all of which were successfully managed without major complications, allowing continuous and stable use of the prosthesis. Within the limitations of a single case report, a double-crown overdenture provided favorable functional and esthetic outcomes during an 8-year follow-up period. This approach may be considered a treatment option for selected patients with multiple ankylosed and impacted teeth when orthodontic and surgical interventions are unsuccessful or not feasible.