3D Finite Element Non-linear Stress Analysis of Minimal Invasive Prosthesis for Short Coronal Molars

doi:10.13701/j.cnki.kqyxyj.2023.11.010

Abstract

Abstract: Objective: To study von Mises stress distribution of endocrown and occlusal veneer applied to tooth defect of short coronal molars using three dimensional finite element non-linear stress analysis methods. Methods: A healthy and complete right mandibular first molar was selected and established three-dimensional finite element model. The crown was squeezed to 4 mm, then simulated with root canal therapy (master apical file was 25/06) and restored with endocrown or occlusal veneer. Under the set mechanical parameters, mastication motion was simulated, the value and distribution of equivalent stress in the whole and each part of the model were recorded. Results: The maximum residual dentine mesial root equivalent stress was: the control group (105.30 MPa) > endocrown group (88.95 MPa) > occlusal veneer group (75.47 MPa). Conclusion: From the perspective of protecting the remaining tooth tissue, the occlusal veneer can distribute stress more evenly at the root of the tooth and lower the peak stress in the remaining tooth tissue.

Key words: Three-dimensional finite element, nonlinear analysis, endocrown, occlusal veneer, short coronal molars

LIAO Ying, HUANG Yi. 3D Finite Element Non-linear Stress Analysis of Minimal Invasive Prosthesis for Short Coronal Molars[J]. Journal of Oral Science Research, 2023, 39(11): 988-994.

References

[1] 张靖.IPS e.max press热压铸全瓷高嵌体用于短冠磨牙牙体缺损修复的临床效果评价[J].当代医学,2021,27(10): 168-170.
[2] 张李磊,干春凤,李玉增.两种不同材料制作髓腔固位冠修复短冠磨牙牙体缺损的临床研究[J].中国医药科学,2022,12(23): 197-200.
[3] 黄绮雯,马晓晴,唐亮.髓腔固位冠的临床应用研究进展[J].临床医学研究与实践,2022,7(13): 185-189.
[4] 邵丽梅,张文云,苏军,等.牙合贴面修复早期隐裂牙的3年临床效果观察[J].口腔颌面修复学杂志,2022,23(4): 267-271.
[5] 黎锐锋,苏志康,陈定,等.全程数字化釉锆牙合贴面桥治疗牙列重度磨耗1例[J].口腔医学研究,2022,38(3): 288-290.
[6] 沈斯特,陈雅云,黄珂,等.三种树脂基陶瓷牙合贴面抗折强度的实验研究[J].口腔颌面修复学杂志, 2022,23(6): 430-434.
[7] 王惠芸.我国人牙的测量和统计[J].中华口腔科杂志,1959,7(3): 149-155.
[8] 高琳, 韩祥永, 徐晓明.不同材料及不同固位深度的髓腔固位冠修复下颌第二磨牙的三维有限元分析[J].上海口腔医学,2022,31(6): 621-624.
[9] 冯娟.全覆盖式高嵌体修复根管治疗后下颌第一磨牙的三维有限元分析[D].第四军医大学,2017.
[10] 程侠,张修银,吴艳玲,等.不同垫底材料对髓腔固位冠抗折性能影响的三维有限元分析[J].口腔颌面修复学杂志,2021,22(1): 43-47+60.
[11] 华文兵.树脂粘接剂类型和厚度对IPS e.max玻璃陶瓷粘接性能影响的研究[D].上海交通大学,2019.
[12] Dejak B, Mlotkowski A. 3D-Finite element analysis of molars restored with endocrowns and posts during masticatory simulation[J]. Dent Mater, 2013, 29(12):e309-e317.
[13] 王谜,刘定坤,邹俊东,等.有限元法模拟下颌磨牙咀嚼载荷的研究进展[J].口腔医学,2020,40(7): 673-676.
[14] 张国梅,祝军,胡杨,等.E-Max瓷嵌体三维有限元模型粘接界面应力分析[J].中国组织工程研究,2021,25(4): 537-541.
[15] Archangelo KC, Guilardi LF, Campanelli D, et al. Fatigue failure load and finite element analysis of multilayer ceramic restorations[J]. Dent Mater, 2018, 35(1):64-73.
[16] Xavier JC, Monteiro GQdM, Montes MAJR. Polymerization shrinkage and flexural modulus of flowable dental composites[J]. Materials Research, 2010, 13(3).
[17] Rand A, Stiesch M, Eisenburger M, et al. The effect of direct and indirect force transmission on peri-implant bone stress-a contact finite element analysis[J]. Comput Methods Biomech Biomed Engin, 2017, 20(10):1132-1139.
[18] 王静,殷金萍,林华洁,等.动态载荷下不同方式修复牙重度楔状缺损有限元分析[J].上海口腔医学,2022,31(6): 615-620.
[19] Ghoul WE, Özcan M, Tribst JPM, et al. Fracture resistance, failure mode and stress concentration in a modified endocrown design[J]. Biomater Investig Dent, 2020, 7(1):110-119.