PMID- 37009868
OWN - NLM
STAT- MEDLINE
DCOM- 20230404
LR  - 20230405
IS  - 1472-6831 (Electronic)
IS  - 1472-6831 (Linking)
VI  - 23
IP  - 1
DP  - 2023 Apr 2
TI  - Effect of access cavities on the biomechanics of mandibular molars: a finite 
      element analysis.
PG  - 196
LID - 10.1186/s12903-023-02878-3 [doi]
LID - 196
AB  - INTRODUCTION: This study aimed to predict the fracture resistance of a mandibular 
      first molar (MFM) with diverse endodontic cavities using finite element analysis 
      (FEA). METHODS: Five experimental finite element models representing a natural 
      tooth (NT) and 4 endodontically treated MFMs were generated. Treated MFM models 
      were with a traditional endodontic cavity (TEC) and minimally invasive endodontic 
      (MIE) cavities, including guided endodontic cavity (GEC), contracted endodontic 
      cavity (CEC) and truss endodontic cavity (TREC). Three loads were applied, 
      simulating a maximum bite force of 600 N (N) vertically and a normal masticatory 
      force of 225 N vertically and laterally. The distributions of von Mises (VM) 
      stress and maximum VM stress were calculated. RESULTS: The maximum VM stresses of 
      the NT model were the lowest under normal masticatory forces. In endodontically 
      treated models, the distribution of VM stress in GEC model was the most similar 
      to NT model. The maximum VM stresses of the GEC and CEC models under different 
      forces were lower than those of TREC and TEC models. Under vertical loads, the 
      maximum VM stresses of the TREC model were the highest, while under the lateral 
      load, the maximum VM stress of the TEC model was the highest. CONCLUSION: The 
      stress distribution of tooth with GEC was most like NT. Compared with TECs, GECs 
      and CECs may better maintain fracture resistance, TRECs, however, may have a 
      limited effect on maintenance of the tooth resistance.
CI  - (c) 2023. The Author(s).
FAU - Wang, Xiao
AU  - Wang X
AD  - Department of Endodontics, School of Stomatology, State Key Laboratory of 
      Military Stomatology & National Clinical Research Center for Oral Diseases & 
      Shaanxi Clinical Research Center for Oral Diseases, The Fourth Military Medical 
      University, 710032, Xi'an, China.
FAU - Wang, Dan
AU  - Wang D
AD  - Department of Endodontics, School of Stomatology, State Key Laboratory of 
      Military Stomatology & National Clinical Research Center for Oral Diseases & 
      Shaanxi Clinical Research Center for Oral Diseases, The Fourth Military Medical 
      University, 710032, Xi'an, China.
FAU - Wang, Yi-Rong
AU  - Wang YR
AD  - Department of Endodontics, School of Stomatology, State Key Laboratory of 
      Military Stomatology & National Clinical Research Center for Oral Diseases & 
      Shaanxi Clinical Research Center for Oral Diseases, The Fourth Military Medical 
      University, 710032, Xi'an, China.
FAU - Cheng, Xiao-Gang
AU  - Cheng XG
AD  - Department of Endodontics, School of Stomatology, State Key Laboratory of 
      Military Stomatology & National Clinical Research Center for Oral Diseases & 
      Shaanxi Clinical Research Center for Oral Diseases, The Fourth Military Medical 
      University, 710032, Xi'an, China.
FAU - Ni, Long-Xing
AU  - Ni LX
AD  - Department of Endodontics, School of Stomatology, State Key Laboratory of 
      Military Stomatology & National Clinical Research Center for Oral Diseases & 
      Shaanxi Clinical Research Center for Oral Diseases, The Fourth Military Medical 
      University, 710032, Xi'an, China.
FAU - Wang, Wei
AU  - Wang W
AD  - Department of Endodontics, School of Stomatology, State Key Laboratory of 
      Military Stomatology & National Clinical Research Center for Oral Diseases & 
      Shaanxi Clinical Research Center for Oral Diseases, The Fourth Military Medical 
      University, 710032, Xi'an, China. weiwang_0510@163.com.
FAU - Tian, Yu
AU  - Tian Y
AD  - Department of Endodontics, School of Stomatology, State Key Laboratory of 
      Military Stomatology & National Clinical Research Center for Oral Diseases & 
      Shaanxi Clinical Research Center for Oral Diseases, The Fourth Military Medical 
      University, 710032, Xi'an, China. tianyu@fmmu.edu.cn.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20230402
PL  - England
TA  - BMC Oral Health
JT  - BMC oral health
JID - 101088684
SB  - IM
MH  - Humans
MH  - Finite Element Analysis
MH  - Biomechanical Phenomena
MH  - *Tooth
MH  - Molar
MH  - *Dental Caries
MH  - Dental Stress Analysis
MH  - Stress, Mechanical
PMC - PMC10069102
OTO - NOTNLM
OT  - Cavity
OT  - Finite element method
OT  - Fracture resistance
OT  - Minimally invasive endodontics
COIS- The authors declare that they have no competing interests.
EDAT- 2023/04/04 06:00
MHDA- 2023/04/04 06:42
PMCR- 2023/04/02
CRDT- 2023/04/03 06:03
PHST- 2022/12/05 00:00 [received]
PHST- 2023/03/13 00:00 [accepted]
PHST- 2023/04/04 06:42 [medline]
PHST- 2023/04/03 06:03 [entrez]
PHST- 2023/04/04 06:00 [pubmed]
PHST- 2023/04/02 00:00 [pmc-release]
AID - 10.1186/s12903-023-02878-3 [pii]
AID - 2878 [pii]
AID - 10.1186/s12903-023-02878-3 [doi]
PST - epublish
SO  - BMC Oral Health. 2023 Apr 2;23(1):196. doi: 10.1186/s12903-023-02878-3.