美学区种植义齿与天然邻牙在不同咬合关系中的三维有限元分析

doi:10.13591/j.cnki.kqyx.2025.12.003

Abstract

Abstract:

Objective To investigate the biomechanical effects of implant-supported prostheses on natural adjacent teeth in the aesthetic zone and provide a reference for reducing the occurrence of proximal contact loss after implant restoration in the aesthetic zone. Methods A three-dimensional finite element model of the maxillary aesthetic zone with natural dentition was established as the control group (Group A), and a mixed dentition model including an implant-supported prosthesis at the right maxillary central incisor and its adjacent teeth was established as the experimental group (Group B). Finite element analysis software was used to calculate the differences in displacement direction and magnitude between the two groups under three different occlusal relationships. Results Under the same occlusal relationship, the physiological mobility of natural teeth was significantly greater than that of implant-supported prostheses. The total displacement of the natural adjacent teeth in Group B was greater than that of the corresponding teeth in Group A. Under different occlusal relationships, the right maxillary lateral incisor in Group A exhibited distal displacement, while the left maxillary central incisor exhibited mesial displacement. In Group B, both the right maxillary lateral incisor and the left maxillary central incisor exhibited distal displacement. Under occlusal loading, the gaps between the implant-supported prosthesis and the adjacent natural teeth in Group B were larger than the gaps between the right maxillary central incisor and its adjacent teeth in Group A. Conclusion Under the influence of occlusal forces, the implantation of the implant-supported prosthesis increases the total displacement amplitude of the natural adjacent teeth and affects the direction of their displacement, causing the natural teeth to tend to move away from the implant prosthesis. Occlusal factors are key determinants affecting the proximal contact relationship after implant restoration.

Key words: aesthetic zone, dental implant, proximal contact loss, finite element analysis

CLC Number:

R783.4

QIAN Yi, YANG Yi, BI Xiaoming, XU Jiya, WANG Zhifang, WANG Yueqiu, LIU Mei. Three-dimensional finite element analysis of implant-supported prostheses and natural adjacent teeth in the aesthetic zone under different occlusal relationships[J]. Stomatology, 2025, 45(12): 895-900.

Figures/Tables 6

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References 33

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材料	弹性模量/MPa	泊松比
皮质骨	1.37×10⁴	0.30
松质骨	1.37×10³	0.30
牙体组织	1.86×10⁴	0.31
牙周膜	68.90	0.45
种植体(钛)	1.10×10⁵	0.35
基台(钛)	1.10×10⁵	0.35
氧化锆全瓷冠	2.10×10⁵	0.27
螺丝(钛)	1.10×10⁵	0.35
粘接层(玻璃离子水门汀)	1.59×10⁴	0.33

咬合状态	A模型			B模型
咬合状态	右上侧切牙	右上中切牙	左上中切牙	右上侧切牙	种植义齿	左上中切牙
对刃牙合	35.18	63.56	66.78	35.96	34.81	69.87
正常牙合	87.99	102.07	109.17	93.56	58.06	111.52
深覆牙合	63.61	74.73	81.49	72.67	48.35	89.93

模型	邻接点		对刃牙合				正常牙合				深覆牙合
模型	邻接点		X轴		Y轴		X轴		Y轴		X轴		Y轴
A模型	右上侧切牙近中面邻接点	-13.61		-80.81		-11.66		-202.34		-15.38		-126.00
	右上中切牙远中面邻接点	-7.15		-93.48		-7.95		-225.19		-7.71		-110.03
	右上中切牙近中面邻接点	-8.93		-129.13		-9.04		-248.36		-9.47		-128.25
	左上中切牙近中面邻接点	-4.50		-119.61		-2.38		-230.53		-4.42		-139.15
B模型	右上侧切牙近中面邻接点	-18.16		-84.67		-40.63		-245.07		-26.77		-173.36
	种植义齿远中面邻接点	-5.73		-99.30		-6.10		-201.26		-4.85		-139.78
	种植义齿近中面邻接点	-7.67		-134.32		-8.01		-245.49		-6.36		-170.41
	左上中切牙近中面邻接点	4.71		-145.13		9.73		-276.17		14.36		-206.41

咬合关系	模型	右上中切牙/种植义齿与右上侧切牙间的间隙		右上中切牙/种植义齿与左上中切牙间的间隙
咬合关系	模型	X轴	Y轴	X轴	Y轴
对刃牙合	A	6.46	12.67	4.43	9.52
	B	12.43	14.63	12.38	10.81
正常牙合	A	3.71	22.85	6.66	17.83
	B	34.53	43.81	17.74	30.69
深覆牙合	A	7.67	15.97	5.05	10.90
	B	21.92	33.58	20.72	36.00

Three-dimensional finite element analysis of implant-supported prostheses and natural adjacent teeth in the aesthetic zone under different occlusal relationships

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