Int J Stomatol

Int J Stomatol ›› 2021, Vol. 48 ›› Issue (1): 41-49.doi: 10.7518/gjkq.2021011

• Original Articles • Previous Articles     Next Articles

Three-dimensional finite element study on the effect of pulp opening cavity on the resistance of cracked teeth after full crown restoration

Ji Mengzhen1,Qi Meiyao1,Du Kexin1,Quan Shuqi1,Zhang Yuqiang1,Zheng Qinghua2()   

  1. 1. State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & West China School of Stomatology, Sichuan University, Chengdu 610041, China;
    2. State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Dept. of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China;
  • Received:2020-02-23 Revised:2020-07-20 Online:2021-01-01 Published:2021-01-20
  • Contact: Qinghua Zheng E-mail:qhzheng1001@163.com
  • Supported by:
    This study was supported by Youth Program of National Natural Science Foundation of China(11402154)

RichHTML

32

PDF (PC)

476

Abstract:

Objective To investigate the effect of traditional endodontic cavity and minimally invasive endodontics root canal therapy on the resistance of teeth restored with porcelain crowns. Methods Three dimensional virtual models of cracked teeth with three different depth of crack were made to simulate minimally invasive endodontics and traditional endodontic cavity, and complete root canal therapy and porcelain crown restoration. Under the condition of vertical loading and oblique loading, the distribution and numerical value of tooth stress were recorded. Results Under the two loading conditions, the stress of the teeth before the treatment was concentrated at the bottom of the crack, and the local stress concentration increased with the deepening of the depth of the crack. The local stress of the abutment was mainly distributed at the shoulder after the restoration of the porcelain full crown. The local stress concentration has been greatly alleviated. There was no significant difference in the effect of different endodontic cavity on the stress distribution and magnitude of cracked teeth. Conclusion The restora-tion of porcelain crowns after root canal therapy is an effective measure for the treatment of cracked teeth. Compared with the traditional endodontic cavity, the minimally invasive endodontics cannot improve the stress distribution of cracked teeth after full crown restoration.

Key words: cracked tooth, traditional endodontic cavity, minimally invasive endodontics, porcelain fused to metal crown, finite element analysis

CLC Number: 

  • R781.05

TrendMD: 

Tab 1

Mechanical properties of the investigated materials"

牙体部位 弹性模量/MPa 泊松比
釉质 46 980.00 0.30
牙本质 11 720.00 0.30
牙槽骨 1 370.00 0.30
牙周膜 70.00 0.45
牙胶尖 0.69 0.45
复合树脂 12 000.00 0.30
金钯合金 89 500.00 0.33
瓷层 68 900.00 0.28

Fig 1

Model of cracked tooth after root canal treatment and full-crown restoration"

Fig 3

Working flow of 3D infinite model analysis"

Fig 3

The distribution of stress on each part of Group A under vertical loading"

Fig 4

Working flow of 3D infinite model analysis"

Fig 5

Distribution of stress on enamel and other dental tissue of model A, B and C before treatment under vertical loading"

Fig 6

Distribution of stress on abutment of all tested groups after restoration under vertical loading"

Fig 7

The maximum value of stress on the abutment before and after restoration under vertical stress"

Tab 2

The distribution and numerical value of tooth stress in all tested groups under vertical stress"

隐裂深度/mm 是否修复及方法 牙体组织应力最大部位 应力最大值/MPa
3.4 修复前 集中于裂纹底部 54.60
传统开髓+烤瓷全冠 分布于近中肩台 31.45
微创开髓+烤瓷全冠 分布于近中肩台 30.42
5.1 修复前 集中于裂纹底部 68.37
传统开髓+烤瓷全冠 分布于近中肩台 33.12
微创开髓+烤瓷全冠 分布于近中肩台 30.75
7.2 修复前 集中于裂纹底部 253.45
传统开髓+烤瓷全冠 分布于近中肩台 32.40
微创开髓+烤瓷全冠 分布于近中肩台 32.10

Tab 3

The distribution and numerical value of tooth stress in all tested groups under oblique stress"

隐裂深度/mm 是否修复及方法 牙体组织应力最大部位 应力最大值/MPa
3.4 修复前 集中于裂纹底部 347.42
传统开髓+烤瓷全冠 分布于近中肩台 67.25
微创开髓+烤瓷全冠 分布于近中肩台 64.23
5.1 修复前 集中于裂纹底部 486.84
传统开髓+烤瓷全冠 分布于近中肩台 68.84
微创开髓+烤瓷全冠 分布于近中肩台 67.66
7.2 修复前 集中于裂纹底部 1 191.50
传统开髓+烤瓷全冠 集中于裂纹底部 117.30
微创开髓+烤瓷全冠 集中于裂纹底部 120.69

Fig 18

The distribution of stress on enamel and other dental tissue of model A, B and C before treatment under oblique loading"

Fig 9

Distribution of stress on abutment of all tested groups after restoration under oblique loading"

Fig 10

The maximum value of stress on the abutment before and after restoration under oblique stress"

[1] Geurtsen W, Schwarze T, Günay H . Diagnosis,the- rapy, and prevention of the cracked tooth syndrome[J]. Quintessence Int, 2003,34(6):409-417.
pmid: 12859085
[2] Krell KV, Caplan DJ . 12-month success of cracked teeth treated with orthograde root canal treatment[J]. J Endod, 2018,44(4):543-548.
[3] 徐韵, 陆卫青 . 牙合力与深度对楔状缺损修复疗效影响的有限元分析[J]. 同济大学学报(医学版), 2011,32(5):57-60.
Xu Y, Lu WQ . Influence of depth and occlusal force on the treatment results of wedge-shaped defect: analysis with a 3-D finite element model[J]. J Tong- ji Univ (Med Sci), 2011,32(5):57-60.
[4] Clark D, Khademi J, Herbranson E. Fracture resistant endodontic and restorative preparations[J]. DentToday, 2013, 32(2): 118, 120-123.
[5] Tang W, Wu Y, Smales RJ . Identifying and reducing risks for potential fractures in endodontically treated teeth[J]. J Endod, 2010,36(4):609-617.
[6] Clark D, Khademi JA . Case studies in modern molar endodontic access and directed dentin conservation[J]. Dent Clin N Am, 2010,54(2):275-289.
doi: 10.1016/j.cden.2010.01.003 pmid: 20433978
[7] Krishan R, Paqué F, Ossareh A , et al. Impacts of conservative endodontic cavity on root canal instrumentation efficacy and resistance to fracture assessed in incisors, premolars, and molars[J]. J Endod, 2014,40(8):1160-1166.
[8] Moore B, Verdelis K, Kishen A , et al. Impacts of contracted endodontic cavities on instrumentation efficacy and biomechanical responses in maxillary molars[J]. J Endod, 2016,42(12):1779-1783.
[9] Chlup Z, Žižka R, Kania J , et al. Fracture behaviour of teeth with conventional and mini-invasive access cavity designs[J]. J Eur Ceram Soc, 2017,37(14):4423-4429.
[10] Plotino G, Grande NM, Isufi A , et al. Fracture streng- th of endodontically treated teeth with different access cavity designs[J]. J Endod, 2017,43(6):995-1000.
[11] Rover G, Belladonna FG, Bortoluzzi EA , et al. Influence of access cavity design on root canal detection, instrumentation efficacy, and fracture resistan- ce assessed in maxillary molars[J]. J Endod, 2017,43(10):1657-1662.
[12] Bonfante EA, Rafferty BT, Silva NR , et al. Residual thermal stress simulation in three-dimensional molar crown systems: a finite element analysis[J]. J Prosthodont, 2012,21(7):529-534.
[13] 朱智敏 . 牙颌生物组织的力学性能研究[J]. 国外医学(口腔医学分册), 1994,21(4):219-222.
Zhu ZM . Study on the mechanical properties of dental jaw tissues[J]. Foreign Med Sci (Stomatol), 1994,21(4):219-222.
[14] Mei ML, Chen YM, Li H , et al. Influence of the indirect restoration design on the fracture resistance: a finite element study[J]. Biomed Eng Online, 2016,15(1):3.
[15] 邱晓霞, 邢旭娜, 张海燕 , 等. 上颌第一磨牙近中舌尖缺损伴隐裂修复设计的有限元分析[J]. 实用口腔医学杂志, 2016,32(1):43-47.
Qiu XX, Xing XN, Zhang HY , et al. Finite element analysis of the prosthodontic design for maxillary first molar mesio-lingual cusp defect with subfissue[J]. J Pract Stomatol, 2016,32(1):43-47.
[16] 侯铁舟, 朱丰燕, 陶洪 , 等. 下颌第一磨牙隐裂模型裂纹变化的三维有限元分析[J]. 华西口腔医学杂志, 2009,27(2):126-129, 134.
Hou TZ, Zhu FY, Tao H , et al. Three-dimensional finite element analysis of the change of cracks in the cracked first mandibular molar under different loa- ding conditions[J]. West China J Stomatol, 2009,27(2):126-129, 134.
[17] 樊明文 . 牙体牙髓病学[M]. 4版. 北京: 人民卫生出版社, 2012: 312-314.
Fan MW. Endodontics[M]. 4th ed. Beijing: People's Medical Publishing House, 2012: 312-314.
[18] 赵铱民 . 口腔修复学[M]. 7版. 北京: 人民卫生出版社, 2012: 82-86.
Zhao YM. Prosthodontics[M]. 7th ed. Beijing: Peo- ple's Medical Publishing House, 2012: 82-86.
[19] 钱蕴珠, 李建, 季立标 . 隐裂磨牙牙尖斜度的三维重建测量研究[J]. 临床口腔医学杂志, 2005,21(8):459-461.
Qian YZ, Li J, Ji LB . A measurement after 3D-reconstruction to study cuspal inclination of the cracked molars[J]. J Clin Stomatol, 2005,21(8):459-461.
[20] Waldecker M, Rues S, Rammelsberg P , et al. Validation of in-vitro tests of zirconia-ceramic inlay-retained fixed partial dentures: a finite element analysis[J]. Dent Mater, 2019,35(3):e53-e62.
[21] Kosti E, Zinelis S, Molyvdas I , et al. Effect of root canal curvature on the failure incidence of ProFile rotary Ni-Ti endodontic instruments[J]. Int Endod J, 2011,44(10):917-925.
[22] Tiu J, Al-Amleh B, Waddell JN , et al. Reporting numeric values of complete crowns. Part 1: clinical preparation parameters[J]. J Prosthet Dent, 2015,114(1):67-74.
[23] Maghami E, Homaei E, Farhangdoost K , et al. Effect of preparation design for all-ceramic restoration on maxillary premolar: a 3D finite element study[J]. J Prosthodont Res, 2018,62(4):436-442.
[24] 刘斐, 李冰, 张并生 . 上颌第一磨牙基牙不同聚合度对Inceram-Z全瓷冠应力分布影响的三维有限元研究[J]. 中国医药导报, 2009,6(35):20-21, 29.
Liu F, Li B, Zhang BS . Influence of taper abutment angle on a restored all-ceramic crown of a maxillary first molar using finite element analysis[J]. China Med Her, 2009,6(35):20-21, 29.
[1] Huang Yihuan,Li Weihang,Ma Dian,Chen Jin,Qian Jie,Li Xudong.. Finite element analysis of IPS e.maxCAD and Lava Ultimate materials with different thickness in occlusal veneer [J]. Int J Stomatol, 2023, 50(4): 423-432.
[2] Dong Xu,Xu Xin. Research progress on cracked tooth [J]. Int J Stomatol, 2021, 48(6): 668-674.
[3] Peng Weiqi,Gao Yuan,Xu Xin. The minimally invasive concept and research progress on access cavity design [J]. Int J Stomatol, 2021, 48(4): 433-438.
[4] Chen Xin,Mao Bochun,Lu Yuqing,Dong Bo,Zhu Zhuoli,Yue Li,Yu Haiyang. Research on mechanical property of Co-Cr alloy and polyetheretherketone frameworks of removable partial denture: a three-dimensional finite element analysis [J]. Int J Stomatol, 2019, 46(5): 526-531.
[5] Yan Dan,Zhang Xizhong,Wang Jianguo. 3D finite element analysis for influence of microimplant thread depth on microimplant and mandible [J]. Int J Stomatol, 2019, 46(4): 387-392.
[6] Lu Huang,Jie Qian. Research progress on three dimensional finite element analysis method in inlay restorations [J]. Inter J Stomatol, 2018, 45(6): 728-733.
[7] Zeng Tingyan, Huang Shenggao. A three-dimensional finite element analysis for stability of mini-implant anchorage [J]. Inter J Stomatol, 2018, 45(1): 112-118.
[8] Zhang Xiao, Deng Qingwan, Du Qiong, Xie Jing. Three-dimensional finite element analysis of premolars restored with master fiber post-combined with auxiliary fiber post [J]. Inter J Stomatol, 2017, 44(5): 559-565.
[9] Yan Dan, Zhang Xizhong, Wang Zengquan, Wang Jianguo, Guan Zejian. Three-dimensional finite element analysis for the influence of micro-implant pitch on micro-implant-bone interface [J]. Inter J Stomatol, 2015, 42(5): 557-561.
[10] Guan Qing, Jin Tao, Gu Yongchun, Yang Ben, Ni Longxing. Three-dimensional finite element analysis of three types of instruments used in curved root canals subjected to torsional load [J]. Inter J Stomatol, 2015, 42(3): 269-272.
[11] Zhang Qiang1, Li Ying2.. Influence of placing depth of implants with platform switching on stress distribution in peri-implant bone according to type Ⅱ bone by finite element analysis [J]. Inter J Stomatol, 2014, 41(1): 31-35.
[12] Liu Tianshuang1, Fan Cheng2, Li Zhenchun3, Chen Xiaodong3.. Destructive analysis on porcelain laminate veneers of different designs [J]. Inter J Stomatol, 2012, 39(5): 565-567.
[13] CHEN Yu, LIN Zheng-mei. Clinical research about cracked tooth [J]. Inter J Stomatol, 2009, 36(3): 355-357，360.
[14] FU Zhi-feng1, LI Yan2. Study of finite element analysis in the post-core-crown restorations [J]. Inter J Stomatol, 2008, 35(6): 701-701～703.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
[1] . [J]. Foreign Med Sci: Stomatol, 1999, 26(06): .
[2] . [J]. Foreign Med Sci: Stomatol, 1999, 26(06): .
[3] . [J]. Foreign Med Sci: Stomatol, 1999, 26(05): .
[4] . [J]. Foreign Med Sci: Stomatol, 1999, 26(05): .
[5] . [J]. Foreign Med Sci: Stomatol, 1999, 26(05): .
[6] . [J]. Foreign Med Sci: Stomatol, 1999, 26(04): .
[7] . [J]. Foreign Med Sci: Stomatol, 1999, 26(04): .
[8] . [J]. Foreign Med Sci: Stomatol, 1999, 26(04): .
[9] . [J]. Foreign Med Sci: Stomatol, 1999, 26(04): .
[10] . [J]. Foreign Med Sci: Stomatol, 1999, 26(04): .