Characteristics Analysis of Bone Quantity of Mandibular Buccal Shelf with Different Skeletal Pattern

doi:10.13701/j.cnki.kqyxyj.2022.04.014

Abstract

Abstract: Objective: To analyze the bone quantity of mandibular buccal shelf with different skeletal patterns, and to explore its influencing factors. Methods: A total of 120 orthodontic patients were selected from the patient image database, and they were divided into skeletal class Ⅰ group, skeletal class Ⅱ group, and skeletal class Ⅲ group according to the sagittal skeletal patterns; and divided into hyperdivergent group, normodivergent group, and hypodivergent group according to vertical skeletal patterns. Bone thickness and cortical bone thickness of 3mm, 6mm and 9mm below the alveolar crest in the mesial and distal root plane of molars in the buccal shelf area were measured and analyzed. Results: (1) The bone quantity of buccal shelf area gradually increased from meso-middle to distal, and from alveolar crest to apical direction (P<0.05). (2) There were differences in bone thickness of buccal shelf area between different sagittal skeletal patterns (P<0.05). (3) There were differences in bone thickness of buccal shelf area between different vertical skeletal patterns (P<0.05). (4) Bone thickness of buccal shelf area was positively correlated with ANB angle, and negatively correlated with mandibular plane angle (P<0.05). Conclusion: There are differences in the bone quantity of mandibular buccal shelf in different skeletal patterns, and the bone quantity of mandibular buccal shelf is affected by sagittal and vertical skeletal patterns, etc. CBCT should be taken to evaluate the bone quantity of mandibular buccal shelf before micro-screw implantation.

Key words: mandibular buccal shelf, bone quantity, sagittal skeletal patterns, vertical skeletal patterns, CBCT

WU Yao, XU Yishan, LI Zhenzhen, SI Chao, LIU Jia, CAO Yu, ZHANG Huichao, YANG Luyi. Characteristics Analysis of Bone Quantity of Mandibular Buccal Shelf with Different Skeletal Pattern[J]. Journal of Oral Science Research, 2022, 38(4): 362-366.

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