PHÂN TÍCH GIẢI PHẪU VÙNG RĂNG SAU HÀM DƯỚI BẰNG PHIM CBCT

Abstract

Objective: To evaluate the thickness of the mandibular bone, the thickness of the tooth root in the buccal-lingual direction and the distance from the apical roots of  the first and second molars to the mandibular canal. Subjects and methods: Retrospective study, CBCT image measurement of 120 patients (72 men and 48 women) at the Department of Dentistry - Hospital 108 from August 2003 to December 2024, including 120 mandibular first molars and 120 second molars. Results: The average age is 45.65 with the age group of 30-50 accounting for 45.83%, more men than women. From the front to the back of the mandibular, 3mmCR-N and CR-N increased significantly but there was no difference between genders, while CR-ORD decreased gradually and there was a difference between men and women at R6. 3mmCR showed no difference between R6 and R7. Conclusion: The buccal bone thickness of the second molar was significantly higher than that of the mandibular first molar but was not affected by gender. The root thickness did not differ between the R6 and R7. The distance from the  apical roots to the mandibular canal decreased in the posterior teeth, which is also consistent with previous studies.