THE CHARACTERISTICS OF MANDIBULAR BUCCAL SHELF IN CLASS III PATIENTS USING CONE-BEAM COMPUTED TOMOGRAPHY

Thị Hưởng Nguyễn 1,, Thị Bích Ngọc Nguyễn 1
1 HMU

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Abstract

Objective: To evaluate the mandibular buccal shelf (MBS) in Class III patients using  cone-beam computed tomography (CBCT). Reasearch methodology: Cross – sectional describle study on 30 CTCB films of Class III patients at the Institute of Odonto-Stomatology – Hanoi Medical University. On CTCB images, the angulation, buccal bone depth (4 and 6 mm from the cementoenamel junction [CEJ] of MBS), and buccal bone thickness (6 and 11 mm from the CEJ of MBS) were measured at the mesial and distal roots of the mandibular first and second molars. Results: There were no statistically significant differences in the angulation, depth, and thickness of MBS between male and female patients, left side and right side. The values for the bone around the distal root of the mandibular second molar were significantly greater than the other values. The bone depth was greater at 4 mm than at 6 mm from CEJ, while the thickness was greater at 11 mm than at 6 mm from CEJ, angulation was increased from the anterior to the posterior area. Conclusions: MBS provides an optimal bone surface for miniscrew insertion, with better osseous characteristics at the distal root of the mandibular second molar, 4 mm from CEJ

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References

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