ĐẶC ĐIỂM LÂM SÀNG VÀ HÌNH ẢNH CHỤP CẮT LỚP VI TÍNH CHÙM TIA HÌNH NÓN Ở BỆNH NHÂN MẤT RĂNG SAU HÀM TRÊN CÓ CHỈ ĐỊNH NÂNG XOANG KÍN

Abstract

Objective: To describe the clinical and cone-beam computed tomography (CBCT) features in patients with posterior maxillary edentulism indicated for closed sinus lift. Subjects and Methods: A case series descriptive study conducted on 20 patients with a single posterior maxillary tooth loss, who were indicated for closed sinus lift  with immediate implant placement at Hoa Su Vung Tau Dental Clinic from August 2024 to January 2025. Results: The most common causes of tooth loss were periodontitis (50.0%) and dental caries (45.0%), with a statistically significant difference between sexes (p = 0.005). Most patients (80.0%) had experienced tooth loss for 1-5 years. On CBCT images, bone density was predominantly type D3 (85.0%), with mean residual bone height and width of 5.04 ± 0.69 mm and 10.46 ± 1.44 mm, respectively. The average thickness of the lateral sinus wall was 1.09 ± 0.32 mm, the median intra-sinus artery diameter was 0.6 mm, and 80.0% of cases showed an angle > 60° between the medial and lateral sinus walls. A moderate positive correlation was observed between bone height and width (r = 0.348; p = 0.026). Conclusion: Most patients with posterior maxillary tooth loss had favorable anatomical and bone quality conditions for closed sinus floor elevation. Combining clinical assessment with CBCT imaging plays a critical role in treatment planning, enabling technique selection to be tailored to each case and minimizing surgical complications.