[Clinical report of early implant-supported mandibular overdenture retained by conical crowns].

PURPOSE: To investigate the feasibility and clinical effectiveness of inchoate implant-supported mandibular overdenture retained by conical crowns. METHODS: In this study, 25 patients with edentulous mandible were included.All patients received 4 to 6 dental implants between the mental foramen and impression taking immediately to make overdenture retained by conical crowns,loading in ten days.All patients were followed up for 1,3,6,12,24 and 36 months, and then once a year.The stability of one implants, the state of peri-implant soft-tissue were recorded, and calculus of peri-implant was cleared. And the state of marginal bone resorption, osseointegration of implants were examined by X-ray films. RESULTS: A total of 103 implants were loaded early, 3 failed.The others had osseointegration,no infection of peri-implant soft-tissue occurred,no implants exhibited peri-implant radiolucencies. The patients were satisfied with the outcomes. CONCLUSIONS: The results of this clinical report suggest that immediate loading of the implants by conical crowns to support overdenture prostheses for edentulous mandible is feasible between the mental foramen. The short-term clinical effectiveness of early loading is good.