IJCEMR

Article http://dx.doi.org/10.26855/ijcemr.2025.01.011

Finite Element Analysis Study of Endodontically Treated Molar Restored with 4 Chairside CAD/CAM Restorations

TOTAL VIEWS: 289

Zhipeng Deng*, Yaqin Tan, Xiao Song

Department of Stomatology, Taihe Hospital, Hubei Medical University, Shiyan 442000, Hubei, China.

*Corresponding author: Zhipeng Deng

Published: February 25,2025

Abstract

Objective: To compare stress distribution in each area of the mandibular first molars after root canal treatment with four different types of restorations and conventional direct resin filling. Methods: Finite element software is used to simulate axial and lateral loads, and analyze the stress value and distribution of intact teeth and different restoration models. Results: The equivalent stress magnitude under lateral loading was significantly higher when compared to that under axial loading. Additionally, the stress levels observed in all the restoration groups exceeded those found in intact teeth under lateral load. It was observed that under the two loading conditions, the endocrown group exhibited the lowest maximum EQV stress. The highest EQV stress peak values were observed in the resin group, affecting the residual dental tissue. The stress distribution varied across each model section. The endocrown group effectively dispersed stress to the dental tissue under both loads. Significant concentrations of stress were observed in the dental tissue surrounding the resin group filling. Conclusions: After root canal treatment, the lateral force should be controlled, the pulp cavity can more evenly transfer the bite force, and a risk of long-term resin filling or dental fracture.

References

[1] Plotino G, Grande NM, Isufi A, Ioppolo P, Pedullà E, Bedini R, Gambarini G, Testarelli L. Fracture Strength of Endodontically Treated Teeth with Different Access Cavity Designs. J Endod. 2017;43(6):995-1000.

[2] Hargrcaves KM, Cohen S. Cohen's pathway of the pulp. 10th ed. St. Louis: Mosby Inc; 2011:790-791.

[3] Duan YJ, Hu WP. Biomechanical analysis of the restoration of adjacent defects of mandibular first molars. Journal of Harbin Medical University. 2022;(1):56.

[4] Wu F, Cao L, Jiang XN, et al. Biomechanical analysis of the adjacent surface of the mandibular first molar. Oral Medicine Research. 2018;34(1):4.

[5] Dietschi D, Argente A, Krejci I, Mandikos M. In vitro performance of Class I and II composite restorations: a literature review on nondestructive laboratory trials—part II. Oper Dent. 2013;38(5):E182-200.

[6] Zhu J, Rong Q, Wang X, et al. Influence of remaining tooth structure and restorative material type on stress distribution in endodontically treated maxillary premolars: A finite element analysis. J Prosthetic Dentistry. 2017;117(5):646.

[7] Sellan PLB, Campaner LM, Tribst JPM, Dal Piva AMO, de Andrade GS, Borges ALS, Bresciani E, Lanzotti A, Ausiello P. Functional or Nonfunctional Cusps Preservation for Molars Restored with Indirect Composite or Glass-Ceramic Onlays: 3D FEA Study. Polymers (Basel). 2021;13(21):3831.

[8] Benazzi S, Kullmer O, Grosse IR, Weber GW. Using occlusal wear information and finite element analysis to investigate stress distributions in human molars. J Anat. 2011;219(3):259-272.

[9] Alfaraj A, Chu TMG, Alouthah H, et al. Tensile bond strength of auto‐polymerizing and heat‐polymerizing denture reliners on the conventional and CAD-CAM denture base materials. Journal of Prosthodontics. 2023;32(S1):87-95.

[10] Dental dontics Committee of Chinese Stomatological Association. Technical-for computer-aided design and auxiliary production of all-porcelain restoration. The Chinese Journal of Oral Medicine. 2022;57(10):5.

[11] Sato TP, Arata A, de Miranda LM, et al. Effect of Porcelain-to-Zirconia Ratio and Bonding Strategy on the Biaxial Flexural Strength and Weibull Characteristics of a Stress-Free Bilayer CAD/CAM Ceramic System. The International journal of prosthodontics. 2022;35(4):469.

[12] Kim SH, Choi YS, Kang KH, et al. Effects of thermal and mechanical cycling on the mechanical strength and surface properties of dental CAD-CAM restorative materials. The Journal of prosthetic dentistry. 2022;128(1):79-88.

[13] Vianna ALSV, Prado CJD, Bicalho AA, Pereira RADS, Neves FDD, Soares CJ. Effect of cavity preparation design and ceramic type on the stress distribution, strain and fracture resistance of CAD/CAM onlays in molars. J Appl Oral Sci. 2018;26:e20180004.

[14] Dejak B, Młotkowski A, Langot C. Three-dimensional finite element analysis of molars with thin-walled prosthetic crowns made of various materials. Dent Mater. 2012;28(4):433-441.

[15] Ausiello P, Ciaramella S, Fabianelli A, Gloria A, Martorelli M, Lanzotti A, Watts DC. Mechanical behavior of bulk direct composite versus block composite and lithium disilicate indirect Class II restorations by CAD-FEM modeling. Dent Mater. 2017;33(6):690-701.

[16] Dartora G, Rocha Pereira GK, Varella de Carvalho R, Zucuni CP, Valandro LF, Cesar PF, Caldas RA, Bacchi A. Comparison of endocrowns made of lithium disilicate glass-ceramic or polymer-infiltrated ceramic networks and direct composite resin restora-tions: fatigue performance and stress distribution. J Mech Behav Biomed Mater. 2019.

[17] Gillen BM, Looney SW, Gu LS, et al. Impact of the Quality of Coronal Restoration versus the Quality of Root Canal Fillings on Success of Root Canal Treatment: A Systematic Review and Meta-analysis. J Endodontics. 2011;37(7):895-902.

[18] Zhai XY, Zhang JY, Zhang SQ, et al. Finite element analysis of different defective mandibular first molar teeth in two marginal designs. West China Journal of Stomatology. 2019;37(5):5.

[19] AboElhassan RG, Watts DC, Alamoush RA, Elraggal A. Biomechanical behavior and Weibull survival of CAD-CAM endocrowns with different marginal designs: A 3D finite element analysis. Dent Mater. 2023;S0109-5641(23)00450-5.

[20] AboElhassan RG, Watts DC, Alamoush RA, et al. Biomechanical behavior and Weibull survival of CAD-CAM endocrowns with different marginal designs: A 3D finite element analysis. Dental Materials. 2024;40(2):227-235.

How to cite this paper

Finite Element Analysis Study of Endodontically Treated Molar Restored with 4 Chairside CAD/CAM Restorations

How to cite this paper:  Zhipeng Deng, Yaqin Tan, Xiao Song. (2025) Finite Element Analysis Study of Endodontically Treated Molar Restored with 4 Chairside CAD/CAM Restorations. International Journal of Clinical and Experimental Medicine Research9(1), 56-60.

DOI: http://dx.doi.org/10.26855/ijcemr.2025.01.011