窄径种植体支持的下颌中切牙单端固定桥修复的三维有限元分析

doi:10.7518/hxkq.2026.2025342

华西口腔医学杂志 ›› 2026, Vol. 44 ›› Issue (2): 251-258.doi: 10.7518/hxkq.2026.2025342

• 基础研究 • 上一篇

窄径种植体支持的下颌中切牙单端固定桥修复的三维有限元分析

周欣欣(), 龚砚硕, 彭巍, 付钢()

重庆医科大学附属口腔医院修复科，口腔疾病研究重庆市重点实验室，口腔生物医学工程重庆市高校市级重点实验室，重庆市卫生健康委口腔生物医学工程重点实验室，重庆 401147

收稿日期:2025-08-21 出版日期:2026-04-01 发布日期:2026-03-31
通讯作者: 付钢 E-mail:zhouxx@stu.cqmu.edu.cn;500137@hospital.cqmu.edu.cn;500137@hospital.cq-mu.edu.cn
作者简介:周欣欣，住院医师，硕士，E-mail：zhouxx@stu.cqmu.edu.cn
基金资助:
重庆市自然科学基金(CSTB2024NSCQ-MSX0908)

Three-dimensional finite element analysis of the cantilever fixed bridge restoration for mandibular central incisors supported by narrow-diameter implants

Zhou Xinxin(), Gong Yanshuo, Peng Wei, Fu Gang()

Dept. of Prosthodontics, Stomatological Hospital of Chongqing Medical University, Chongqing Key Laboratory of Oral Diseases, Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing Municipal Health Commission Key Laboratory of Oral Biomedical Engineering, Chongqing 401147, China

Received:2025-08-21 Online:2026-04-01 Published:2026-03-31
Contact: Fu Gang E-mail:zhouxx@stu.cqmu.edu.cn;500137@hospital.cqmu.edu.cn;500137@hospital.cq-mu.edu.cn
Supported by:
Natural Science Foundation of Chongqing(CSTB2024NSCQ-MSX0908)

摘要/Abstract

摘要：

目的利用三维有限元分析方法探讨3种不同类型的窄径种植体（NDI）支持下颌中切牙单端固定桥修复的生物力学行为。方法选取3种常用NDI分为3组：Z1组（直径2.5 mm Osstem一体式），Z2组（直径2.8 mm Anthogy莫氏锥度连接两段式），Z3组（直径3.0 mm Nobel Active中央螺丝固位两段式）。利用有限元软件构建NDI支持的下颌中切牙单端固定桥的三维有限元模型，分别施加65、130 N的轴向载荷和45°斜向载荷，计算分析种植体及金属部件的von Mises应力、骨组织的主应力及应力分布云图。结果轴向载荷下，只有Z3组种植体在载荷为130 N时，von Mises应力峰值达1 004.5 MPa，超过了材料的屈服强度。45°斜向载荷时，3组NDI的von Mises应力峰值均超过了材料的屈服强度。应力云图显示种植体颈部及其周围骨组织是应力集中区。结论 65 N轴向载荷下，3组NDI支持的下颌中切牙单端固定桥修复方式均具有理论可行性。本研究大致界定了该修复方案的生物力学安全边界，明确了咬合力过大、斜向载荷将带来更大的失效风险。

关键词: 窄径种植体, 三维有限元分析, 下颌切牙缺失, 单端固定桥

Abstract:

Objective To investigate the biomechanical behavior of three distinct types of narrow-diameter implants (NDIs) supporting a single-cantilever fixed bridge for mandibular central incisors using three-dimensional finite element analysis. Methods Three commonly used NDIs were selected: group Z1, Osstem one-piece implant with a dia-meter of 2.5 mm; group Z2, Anthogy Morse taper connected two-piece implant with a diameter of 2.8 mm; group Z3, Nobel Active screw-retained two-piece implant with a diameter of 3.0 mm. The three-dimensional finite-element model of cantilever fixed bridge supported by NDIs was constructed using finite element software. Vertical loads of 65 and 130 N and 45° oblique load were applied. von Mises stress of the implants and metal components, principal stress of the bone tissue, and stress distribution cloud map were calculated and analyzed. Results Under vertical load, only Z3 group implant reached a von Mises stress peak of 1 004.5 MPa at a load of 130 N, exceeding the material’s yield strength. Under the 45° oblique load, the von Mises stress peaks of all three groups of NDIs excee-ded the material’s yield strength. The stress cloud map revealed that the implant neck and surrounding bone tissue were the stress concentration areas. Conclusion All three NDIs groups proved theoretically feasible under a 65 N axial load, with this study delineating the biomechanical safety boundary and highlighting the important risks posed by excessive or oblique loading.

Key words: narrow diameter implants, three-dimensional finite element analysis, mandibular incisors loss, cantilever fixed bridge

中图分类号:

R783.4

周欣欣, 龚砚硕, 彭巍, 付钢. 窄径种植体支持的下颌中切牙单端固定桥修复的三维有限元分析[J]. 华西口腔医学杂志, 2026, 44(2): 251-258.

Zhou Xinxin, Gong Yanshuo, Peng Wei, Fu Gang. Three-dimensional finite element analysis of the cantilever fixed bridge restoration for mandibular central incisors supported by narrow-diameter implants[J]. West China Journal of Stomatology, 2026, 44(2): 251-258.

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材料	弹性模量/MPa	泊松比
皮质骨	13 700	0.30
松质骨	1370	0.30
四级钛（Osstem）	110 000	0.35
Ti-6Al-4V（Anthogy）	103 400	0.35
四级冷作钛（Nobel Active）	110 000	0.35
长石瓷	65 000	0.33
牙	20 000	0.30

材料	测量值	组别	不同载荷下应力峰值/MPa
材料	测量值	组别	轴向65 N	轴向130 N	斜向65 N	斜向130 N
种植体	von Mises应力	Z1	334.94	669.88	971.09	1 942.2
		Z2	318.07	597.29	1 112.7	2 575.1
		Z3	592.05	1 004.5	2 014.1	3 917
金属部件	von Mises应力	Z2组基台	414.97	795.81	1 256.6	2 495.2
		Z3组基台	468.24	955.24	1 469	2 947.2
		Z3组中央螺丝	271.23	435.55	1 157.7	1 912.3
皮质骨	最大主应力	Z1	71.72	143.44	290.08	580.15
		Z2	26.05	53.25	69.78	140.48
		Z3	17.64	37.45	107.66	197.85
	最小主应力	Z1	-143.62	-287.23	-400.52	-801.04
		Z2	-85.68	-167.78	-228.21	-469.87
		Z3	-78.67	-164.83	-318.43	-642.98

窄径种植体支持的下颌中切牙单端固定桥修复的三维有限元分析

Three-dimensional finite element analysis of the cantilever fixed bridge restoration for mandibular central incisors supported by narrow-diameter implants

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