Abstract:

Objective To develop and evaluate a fixed-removable simultaneous prosthetic strategy for Kennedy Class Ⅰ and Ⅱ dentition defect based on the target restoration space (TRS) concept. Methods A virtual patient was created using intraoral scans, CBCT, and facial scans. Under TRS guidance, zirconia crowns, removable implant overdentures, and surgical guides were simultaneously designed. CAD/CAM technology enabled precise fabrication. The proposed treatment was applied to an 82-year-old patient, with a three-year follow-up to evaluate the periodontal condition, prosthesis adaptation, recovery of oral and maxillofacial function, and occurrence of complications. Results A fixed-removable simultaneous prosthetic strategy has been constructed. The protocol reduced follow-up visits to 7 and shortened treatment time to 7.25 months. Despite the delayed tooth extraction against medical advice, the treatment showed a favorable tolerance range. Clinically, the prosthesis had precise marginal fit, and the Locator implant overdenture provided stable retention, resulting in reliable occlusal restoration. At 3 years, OHIP-14 score dropped from 31 to 6, VAS satisfaction was 96, and no complications occurred. Conclusion This TRS-based strategy improves efficiency, reduces clinical burden, and offers a reliable solution for complex edentulous cases in senior patients.

Key words: target restorative space, dentition defect, polyether-etherketone, fixed-removable simultaneous prosthetic strategy, senior patients