颧牙槽嵴支抗稳定性影响因素的三维有限元分析

doi:10.13591/j.cnki.kqyx.2025.02.004

摘要/Abstract

摘要：

目的利用三维有限元对植入到颧牙槽嵴区的微种植体进行应力分析,以期为临床选择植入到该部分的最适微种植体。方法利用ANSYS软件建立颧牙槽嵴区颌骨三维有限元模型;同时建立长度为8、9、10、11、12 mm,螺纹顶角为30°、45°、60°、75°、90°、105°、120°共35种有螺纹微种植体三维有限元模型;模拟微种植体植入颌骨内,建立植入后模型。对微种植体骨界面进行应力分析。结果微种植体-骨界面最大应力值集中在骨皮质中,颊板皮质骨最大应力值、松质骨最大应力值、微种植体最大位移量随螺杆长度增大而减少。螺纹顶角对微种植体-骨界面最大应力值和位移量影响不大。结论螺杆长度影响微种植体-骨界面的应力分布,在颧牙槽嵴处植入长螺杆微种植体可提高其稳定性。

关键词: 微种植体, 三维有限元分析, 螺纹顶角, 长度

Abstract:

Objective To investigate the influence of micro-implant length and screw angle on stress distribution and displacement of micro-implant bone interface when micro-implant was implanted in zygomatic alveolar ridge and bear a certain load, in order to provide certain theoretical basis for micro-implant selection and further optimization design in clinical practice. Methods A three-dimensional finite element model of the jaw in the zygomatic alveolar ridge region was established using ANSYS software. At the same time, 35 kinds of micro-threaded implants with length of 8, 9, 10, 11, 12 mm and angle of 30°, 45°, 60°, 75°, 90°, 105°, 120° were established. The micro-implant was simulated to be implanted in the jaw bone, and the implantation model was established. Stress analysis was performed on the bone interface of the micro-implant. Results The maximum stress of micro-implant bone interface occurred in the bone cortex. The maximum stress value of buccal cortical bone, cancellous bone and micro-implant displacement decreased with the increase of screw length. The angle of screw had little effect on the maximum stress and displacement of micro-implant-bone interface. Conclusion The screw length has an impact on stress distribution of micro-implant bone interface. The micro-implant with longer length can improve its stability in zygomatic alveolar ridge.

Key words: micro-implant, three dimensional finite element analysis, screw angle, length

中图分类号:

R783.5

刘珂, 轩诗杰, 刘鑫. 颧牙槽嵴支抗稳定性影响因素的三维有限元分析[J]. 口腔医学, 2025, 45(2): 100-104.

LIU Ke, XUAN Shijie, LIU Xin. Three-dimensional finite element analysis of factors affecting stability of anchorage in zygomatic alveolar ridge[J]. Stomatology, 2025, 45(2): 100-104.

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模型	材料	弹性模量/ MPa	泊松比	模型单元数量	模型节点数量
重点研究对象	骨皮质	14 700	0.30	25 773	5 956
	骨松质	1 500	0.30	24 709	5 270
	种植体	110 000	0.35	8 297	1 844
其他非研究对象				89 908	27 157

样本1	样本2	r	P
螺纹顶角/ (°)	颊板皮质骨最大应力值/MPa	0.062	0.722
	松质骨最大应力值/MPa	-0.134	0.442
	窦底皮质骨最大应力值/MPa	-0.023	0.897
	微种植体最大应力值/MPa	-0.367	0.030^*
	微种植体最大位移量/mm	0.208	0.231
螺杆长度/ mm	颊板皮质骨最大应力值/MPa	-0.784	0.000^*
	松质骨最大应力值/MPa	-0.874	0.000^*
	窦底皮质骨最大应力值/MPa	0.006	0.973
	微种植体最大应力值/MPa	0.396	0.018^*
	微种植体最大位移量/mm	-0.628	0.000^*