A Comparison of Volume of Tissue Removed and Biomechanical Analysis of Different Access Cavity Designs in 2-rooted Mandibular First Molars: A Multisample 3-dimensional Finite Element Analysis

Fu, Yujie; Zhang, Lan; Gao, Yuan; Huang, Dingming

doi:10.1016/j.joen.2021.12.007

Cited by 12 publications

(5 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although different cavities were compared in this study, FEA cannot fully simulate the real oral environment and our study only carried out for different situations of the same tooth model, may resulting in less convincing results [35]. More in vitro and clinical randomized controlled trials are still needed to verify the results of this study.…”

Section: Discussionmentioning

confidence: 96%

The Effects of Different Endodontic Cavities on the Fracture Resistance of Endodontically Treated Mandibular First Molars- A Three-dimensional Finite Element Analysis

Wang

et al. 2022

Preprint

View full text Add to dashboard Cite

Objectives: The purpose of this study was to predict the fracture resistance of endodontically treated mandibular first molars (MFMs) with diverse minimally invasive endodontic access cavities using finite element models.Materials and Methods: Based on microcomputed tomographic data of an MFM, five three-dimensional finite element models representing a natural tooth (NT) and 4 endodontically treated MFMs were generated using finite element analysis software (HyperWork 14.0, Altair, USA). Treated MFM models were with a traditional endodontic cavity (TEC) and minimal invasive endodontic (MIE) cavities, including a computer-aided designed guided endodontic cavity (GEC), contracted endodontic cavity (CEC) and truss endodontic cavity (TREC). Three loading conditions were applied, simulating a maximum bite force of 600 N vertically and a normal masticatory force of 225 N vertically and laterally. The distributions of von Mises (VM) stress and peak VM stress were calculated.Results: The peak 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 under all loads was the most similar to NT model. The peak VM stresses of the GEC and CEC models under different forces were lower than those of TREC and TEC models. The peak VM stresses of the GEC were lower than those of the CEC under normal masticatory loads but higher under maximum bite load. Under two vertical loads, the peak VM stresses of the TREC model were the highest, while under the lateral load, the peak VM stress of the TEC model was the highest. However, the VM stress in most part of the TEC model was higher than that in TREC model under all loads. Conclusions: Compared with TEC, GEC and CEC could better improve the fracture resistance of teeth. TREC may have a limited effect on fracture resistance enhancement when compared to GEC and CEC.Clinical Relevance: Our data demonstrated that compared with TEC and TREC, GEC and CEC access could better improve the fracture resistance of endodontically treated teeth, which may be an alternative balancing biomechanical properties and clinical convenience.

show abstract

Section: Discussionmentioning

confidence: 96%

The Effects of Different Endodontic Cavities on the Fracture Resistance of Endodontically Treated Mandibular First Molars- A Three-dimensional Finite Element Analysis

Wang

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…[ 38 ] Although different cavities were compared under the analytical conditions of the present study, only three representative loads were performed on the same tooth model in our study. [ 29 ] More appropriate loads and samples are still needed to make the experiment more convincing for further research, and more in vitro and clinical randomized controlled trials are still needed to verify the results of this study.…”

Section: Discussionmentioning

confidence: 97%

“…[ 4 , 23 ] However, a recent study shows there was a negative correlation between the amount of dentin in the coronal region and the fracture resistance of the tooth. [ 29 ] In our study, the straight-line access of GEC was simulated using cylinders in the same orientation as coronal 1/3 of every root canal. The design of GEC retains both the advantage of reducing the loss of PCD and the straight-line access, balancing biomechanical properties and clinical convenience.…”

Section: Discussionmentioning

confidence: 99%

Effect of access cavities on the biomechanics of mandibular molars: a finite element analysis

Wang

et al. 2023

BMC Oral Health

View full text Add to dashboard Cite

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.

show abstract

“…The study of the anatomical location of the DZ [10][11][12] as well as the action of the instruments on the PCD [6] have received more attention in the last decade, as maintaining the integrity of the dentin in these areas decreases the concentration of forces in the cervical region of the roots and furcation, reduces the possibility of perforations and the weakness of the dental structure, which prevents failures in RCT and improves the prognosis of root canal-treated teeth [4,5,27]; the clinical relevance of this study based on the action that WG, RB, TS, XP, IR, and TN produce on the root canal portion of the PCD and DZ is notable.…”

Section: Discussionmentioning

confidence: 99%

“…Success in endodontics depends on knowledge of root canal anatomy, protocols for biomechanical preparations, materials, endodontics instruments, and the effect that these series of factors produce on the walls of root canals [1]. In the last decade and with the use of micro-CT devices, there has been an increased interest in the concept of minimally invasive endodontics, with studies on access cavity design, protocols for canal preparations, and the effect that le designs produce on the canal walls, danger zone (DZ) areas, and pericervical dentin (PCD) [2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Microcomputed tomographic evaluation of 6 NiTi files on the pericervical dentin and the smallest dentin thickness zones in mesial root canals of mandibular molars: an in vitro study

Morales,

Sánchez,

Elmsmari

et al. 2024

Clin Oral Invest

View full text Add to dashboard Cite

Objectives: The aim of this study was to evaluate six les on the pericervical dentin (PCD) and the smallest dentin thickness zones (SDTZ) in mesial root canals of mandibular molars.Materials and Methods: Sixty mesial roots with 2 canals were scanned before and after instrumentation with WaveOne Gold (WG), Reciproc Blue (RB), TRUShape (TS), XP-endo Shaper (XP), iRace (IR), and TruNatomy (TN). Surface, volume, structure thickness, SMI, and centroids were evaluated at the PCD, and the changes in the SDTZ were quanti ed. The data obtained werecompared using Wilcoxon and ANOVA with a 5% signi cance level.Results: XP and TN were similar in all the parameters (P >.05) at the PCD, but TN showed signi cant differences from WG, RB, TS, and IR (P <.05), while XP showed signi cant differences from WG (P <.05) in volume, surface, and structure thickness. Regarding the changes in the SDTZ, the amount of dentin removed was similar between the groups in both canals at the middle 1/3, at the cervical 1/3 for MB canals, and in ML canals for RB, TS, XP, IR, and TN (P>.05). The action of WG was signi cantly different from that of XP and TN in the cervical 1/3 of the ML canal (P <.05).Conclusions: XP and TN maintained better the anatomy, with minor changes at the PCD and SDTZ, while WG produced the largest changes. Centering at the PCD was maintained with all the les, and their performances were safe without risk of perforation.

show abstract

A Comparison of Volume of Tissue Removed and Biomechanical Analysis of Different Access Cavity Designs in 2-rooted Mandibular First Molars: A Multisample 3-dimensional Finite Element Analysis

Cited by 12 publications

References 33 publications

The Effects of Different Endodontic Cavities on the Fracture Resistance of Endodontically Treated Mandibular First Molars- A Three-dimensional Finite Element Analysis

The Effects of Different Endodontic Cavities on the Fracture Resistance of Endodontically Treated Mandibular First Molars- A Three-dimensional Finite Element Analysis

Effect of access cavities on the biomechanics of mandibular molars: a finite element analysis

Microcomputed tomographic evaluation of 6 NiTi files on the pericervical dentin and the smallest dentin thickness zones in mesial root canals of mandibular molars: an in vitro study

Contact Info

Product

Resources

About