Effect of buccal and lingual tooth thickness on the restoration of molars after root canal therapy
10.3969/j.issn.1673-9701.2025.02.004
- VernacularTitle:颊舌侧牙体厚度对根管治疗后磨牙修复治疗的影响
- Author:
Guoqing ZHANG
1
;
Limin WANG
1
;
Ali ZHAO
1
;
Liang CAO
1
;
Weiguo WANG
1
Author Information
1. 中国人民解放军联勤保障部队第九○三医院口腔科,浙江 杭州 310000;杭州医学院附属西湖医院口腔科,浙江 杭州 310000
- Publication Type:Journal Article
- Keywords:
Three-dimensional finite element analysis;
Equivalent stress;
Endocrown;
Onlay;
Root canal therapy
- From:
China Modern Doctor
2025;63(2):12-15
- CountryChina
- Language:Chinese
-
Abstract:
Objective To compare the stress magnitude and distribution of the restorations,remaining tooth tissues,and bonding interfaces of endodontically mandibular first molar with different buccolingual residual tooth tissue thicknesses in two different restorations.Methods The finite element method was used to model the restorations of mandibular first molars with different buccolingual residual tissue thicknesses after root canal treatment.The vertical and oblique loads were applied to record the stress magnitude and distribution of restorations,residual tissues,and bonding interfaces of the different restorations.Results Three different models of mandibular first molar were designed based on the amount of buccal and glossal side dental tissue.Based on this simulation of the dental preparation of FO and EC and the preparation of the prosthesis,generating 6 different groups:FO repair in A1 group,thickness of the buccal tooth tissue is 2mm;A2 group was repaired by FO,thickness of the buccal tooth tissue is 3mm;A3 Group was performed with FO repair,thickness of the buccal and lingual remaining tooth tissue is 4mm;In B1 group,with EC repair,thickness of buccal tooth tissue is 2mm;In B2 group with EC repair,thickness of buccal tooth tissue is 3mm;In B3 group,using EC repair,thickness of remaining dental tissue on buccal and lingual side was 4mm.Results Two loading modes,the restoration such as effect force distribution are concentrated around the loading point,dentin effect force are concentrated in the tooth neck,the full coverage of high embedded group restoration-dental resin interface maximum main stress(MPS)is concentrated in the hole wall and shaft wall Angle,the pulp cavity setting crown group restoration-dental resin interface MPS focus in the bottom wall angle of the pulp cavity setting hole type.In the model of tooth tissue thickness in the same buccal-lingual side,except that the peak effect force of the restoration was greater than the peak of the full coverage crown,the peak of the observed index of the full coverage crown was greater than that of the whole cavity.Conclusion Endocrown can better protect the tooth tissue after root canal treatment,and it is recommended to choose endocrown for restoration after root canal treatment.
