创伤性载荷下不同腭侧颈部骨板厚度对上颌前牙区种植修复体生物力学行为的三维有限元分析

doi:10.13591/j.cnki.kqyx.2026.05.004

Abstract

Abstract:

Objective To evaluate the biomechanical response of anterior implant-supported restorations under traumatic impact loading with different palatal cervical bone plate thicknesses. Methods A three-dimensional finite element model of an anterior implant-supported restoration was established based on CBCT data from a healthy adult male. The palatal cervical bone plate thickness was set to 0，0.5，and 1.0 mm，while buccal and incisal impact loads were applied，resulting in six models using a two-factor design. Transient dynamic finite element analysis was conducted to determine the peak time-history responses of implant von Mises stress and the maximum and minimum principal stresses in the surrounding cortical bone. Results Peak implant von Mises stress was concentrated at the implant-abutment junction and remained below the yield strength of titanium. In contrast，the maximum and minimum principal stresses of the cortical bone exceeded their strength thresholds at the moment of impact. Increasing palatal cervical bone plate thickness led to reduced implant and cortical bone stress peaks under both impact conditions，with a greater reduction observed under incisal impact. Overall，buccal impact generated higher stress levels than incisal impact. Conclusion Both palatal cervical bone plate thickness and impact direction significantly affect the traumatic biomechanical behavior of anterior implant-supported restorations. Traumatic impact loading may increase the risk of mechanical overload in peri-implant bone and should be considered in clinical planning and risk assessment for anterior esthetic implant restorations.

Key words: dental trauma, maxillary anterior region, implant-supported restoration, three-dimensional finite element analysis

CLC Number:

R783.4

BI Mengfei, DAI Shuyue, CHEN Jian, ZHOU Yiyi, SHEN Ming. Three-dimensional finite element analysis of the biomechanical behavior of maxillary anterior implant-supported restorations with different palatal cervical bone plate thicknesses under traumatic loading[J]. Stomatology, 2026, 46(5): 344-349.

Figures/Tables 6

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References 26

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材料	弹性模量/MPa	泊松比	密度/（g/cm³）
皮质骨	13 700	0.30	2.00
松质骨	1 370	0.30	0.70
钛（种植体、基台）	110 000	0.34	4.50
二氧化锆（冠）	210 000	0.35	2.40
钢球	200 000	0.30	0.95

腭侧颈部骨板厚度/mm	种植体等效应力		皮质骨最小主应力绝对值		皮质骨最大主应力
腭侧颈部骨板厚度/mm	颊向冲击	切端冲击	颊向冲击	切端冲击	颊向冲击	切端冲击
0	601.50	419.80	1 329.60	907.01	1 255.40	770.52
0.5	540.66	392.37	1 222.80	805.43	1 184.40	688.34
1.0	522.68	370.10	1 199.30	727.03	989.80	569.92

Three-dimensional finite element analysis of the biomechanical behavior of maxillary anterior implant-supported restorations with different palatal cervical bone plate thicknesses under traumatic loading

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