ĐÁNH GIÁ TÌNH TRẠNG MINI IMPLANT VÀ HÀM PHỦ TRÊN MINI IMPLANT SAU 5 NĂM

Abstract

Background: Mini-implant (MI) for overdentures is an alternative treatment option to two conventional implants in elderly patients with systemic diseases and severe bone resorption. In Vietnam, in spite of many studies on MI, there are still few studies evaluating the success of MI-supported mandibular overdentures after long period of use. Objectives: Evaluate the effectiveness of MI to support a mandibular complete denture after 5 years on the following aspects: MI, denture condition, patient’s satisfaction, and complications (if any). Materials and methods: Case-study report on patients treated with mandibular overdenture on MI (in the study of Le Thi Phuong Lan, 2015). Patients were examined clinically, taken periapical radiographs of the area with MI and evaluated the MI (including stability, soft tissue condition, existence and severity of bone loss around the implant), the overdenture’s condition (retention, stability, occlusion), patient’s satisfaction with dentures (via the questionnaires) and complications. Results: The stability of 19 MIs was poor (10<PTVs > 20). More than 80% of MIs have PlI and GI at 2^nd and 3^rd degree. Vertical bone loss: 3.59 ± 1.25 mm, horizontal 1.2 ± 0.96 mm. The cumulative survival rate of MI was 78.95 %. The dentures have poor retention, low vertical dimensions, but complete stability. The patients are very satisfied with the denture. Nearly 50% of MIs have worn ball heads. Conclusion: The existence of MI after long time helps to support the mandibular overdenture. Poor denture maintenance and difficulty in maintaining hygiene around the MI are issues of concern in these patients.