骨皮质微钻孔术辅助压低磨牙在修复前正畸中应用的临床研究

doi:10.13591/j.cnki.kqyx.2022.11.008

Abstract

Abstract: Objective To study the influence of micro-osteoperforations on the pressing speed of elongated teeth and evaluate the safety and stability of its application to accelerate depressing elongated teeth. Methods Forty-four patients, who had missing mandibular unilateral first molars with elongated antagonist molars and needed to depress maxillary molars before restoration, were collected and randomly divided into two groups with 22 patients in each group. After local anesthesia, patients in the control group were implanted with micro-implant anchorage nails in buccal and palatal sides of the target teeth. Immediately after the operation, a chain rubber band was used to apply force across occlusal surfaces of the teeth, which was pressed until the target teeth were flush with marginal ridges of adjacent teeth. Subsequently, their missing mandibular molars were restored. The above operation was also carried out in the experimental group. Using manual tools to assist taps, holes were drilled in mesio and distal areas of buccal and palatal sides of the target teeth, respectively, to penetrate the cortical bone with a depth of 2 mm below the bone cortex. Three holes were drilled in each area with a spacing of 3 mm. The depression distance, pressing time, postoperative pain degree, root resorption degree and root stability of the two groups were observed. Results Average depression distance of the control group was 2.37 mm, while that of the experimental group was 2.36 mm, with no significant difference. Average pressing time in the control group was 6.2 months, while that in the experimental group was 5.0 months, which indicated that the course of treatment was significantly shortened. There was no significant difference in postoperative pain between the two groups. Observation of root resorption showed that the root resorption rate of the control group was higher than that of the experimental group. Conclusion Micro-osteoperforations can accelerate the speed of tooth depression, thus shorten the course of treatment, enabling patients to make denture restoration as soon as possible, and also reduce the risk of root resorption, without increasing pain.

Key words: micro-osteoperforations, micro-implant anchorage, molar depression

CLC Number:

R783.5

LU Jianfeng, GUO Haibo, QIU Jing. The clinical study on micro-osteoperforations aiding to depress molars in orthodontic treatment before restoration[J]. Stomatology, 2022, 42(11): 1000-1005.

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The clinical study on micro-osteoperforations aiding to depress molars in orthodontic treatment before restoration

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[1]	PENG Jiajia, LU Wenxin, ZHAO Zhihe, FANG Jie. Research progress of micro-osteoperforation accelerated orthodontic tooth movement [J]. Stomatology, 2022, 42(8): 732-736.
[2]	. Clinical application of molar distalization by micro implant anchorage [J]. , 2014, 34(6): 444-446.