Abstract: Objective To introduce a kind of implant-supported mandibular telescopic overdenture in patients suffering from severe periodontal disease and to evaluate its efficacy. Methods 22 patients with severe periodontal disease were included in this study. 4 Ankylos implants were placed between the mental foramen of each patient. Prefabricated Syncone telescopic abutments were connected to the implants and immediate denture were relined with prefabricated golden coping. After 3 months, definitive denture was made with titanium framework. After 12-27 months, the survival rate, the success rate as well as the soft and hard tissues around each implant were evaluated. The satisfactory level of each patient was also assessed by means of questionnaire. Results In the period of 12-27 months, the survival rate was 100%, and success rate was 97.73%. The condition of perio-implant soft and hard tissues improved. PD (probing depth) and BOP% (bleeding on probing %) decreased with statistical differences. In the point of view of patient satisfaction level, 90.9% patients felt happy for the retention, and 81.8% felt no decrease in retention after 12-27 months. 95.46% patients felt satisfactory with their overdentures. Conclusion This treatment protocol has high survival rate, success rate and patients satisfactory level, which is helpful to improve the condition of soft and hard tissues around implants in patients suffering from severe periodontal disease.

Key words: immediate loading, telescope, dental implant, periodontal disease