THE PARTICULARITIES OF THE MAINTENANCE THERAPY IN PERIODONTAL- IMPLANT-PROSTHETIC FIELD FOR THE PERIODONTIC PATIENT

Introduction: The incidence of total edentulous cases became very low and the partial edentation is predominant, therefore, implant overdentures is an important alternative for the treatment plan. Purpose of the study: The purpose of this study was to evaluate in time the changes of the bone tissue surrounding the dental implants inserted for the treatment of partially edentulous patients, in different overdenture types. Materials and methods: The study was conducted on 41 partially edentulous patients, on whom we inserted 245 dental implants, on upper maxilla and mandible, in anterior and posterior areas; the overdentures were conducted in the following situations: dental crown on single implant, implants in dental bridges, overdentures with mixed support (implant and tooth support). We assessed the implant and the prosthetic maintenance. Results and discussions: No difference was observed for the three overdentures situations regarding the bone tissue changes. The bone loss after 6 months was higher for the maxilla than for the mandible. The rate of bone loss in the first 6 months was higher in the following situations: bone dehiscence, when using bone grafts or membranes, ceramic-fused-to-metal prosthetics. Conclusions: The long term prognosis for single crown and bridge overdentures is favorabl