ĐẶC ĐIỂM LÂM SÀNG, CẬN LÂM SÀNG RĂNG NANH TRƯỚC ĐIỀU TRỊ DI XA BẰNG LOOP TRÊN PHIM CBCT Ở NGƯỜI BỆNH CHỈNH NHA CÓ NHỔ RĂNG

Abstract

Objectives: To describe the clinical and paraclinical features of canines (R3) before retraction using a Loop in orthodontic patients with tooth extraction, based on CBCT imaging. Materials and Methods: A cross-sectional descriptive study was conducted on 32 fully developed canines. Results: Clinical features: 37.50% of canines exhibited axial rotation, while 62.50% (20 canines) did not; 18.75% were mesially inclined, and 81.25% were upright in the mesiodistal direction, 56.25% of canines were inclined lingually, 28.13% were inclined buccally, and 15.62% were upright. Paraclinical features on CBCT images: in the maxilla, the alveolar bone thickness was greatest at the alveolar crest (1.3 ± 0.40 mm), while the root apex was close to the buccal cortical plate (0.82 ± 0.43 mm). In the mandible, the alveolar bone thickness was greatest at the root apex (1.14 ± 0.24 mm). Conclusion: Canines indicated for extraction and retraction are mostly upright clinically but appear either lingually or buccally inclined on CBCT images. In the maxillary canines, the alveolar bone is thickest at the alveolar crest, with the root apex close to the buccal cortical plate. In the mandibular canines, the alveolar bone is thickest at the root apex.