Effects of cementum–dentine junction and cementum on the mechanical response of tooth supporting structure

Ren, Li; Wang, Wenxue; Takao, Yoshihiro; Chen, Z. X.

doi:10.1016/j.jdent.2010.07.013

Cited by 25 publications

(29 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…First of all, the boundary conditions were planned at the outer surface of the roots to avoid complicated FEA models (29). Root cementum was also neglected because its presence in FEA models affects only the stresses generated in the apical of the root and the bone surrounding the root apex (30). Furthermore, photopolymerized resin root models were used instead of real teeth to ensure standardization.…”

Section: Basic Research-technologymentioning

confidence: 99%

Evaluation of the Effect of Rotary Systems on Stresses in a New Testing Model Using a 3-Dimensional Printed Simulated Resin Root with an Oval-shaped Canal: A Finite Element Analysis Study

Eken

Şen

Eskitaşçıoğlu

et al. 2016

Journal of Endodontics

View full text Add to dashboard Cite

Section: Basic Research-technologymentioning

confidence: 99%

Evaluation of the Effect of Rotary Systems on Stresses in a New Testing Model Using a 3-Dimensional Printed Simulated Resin Root with an Oval-shaped Canal: A Finite Element Analysis Study

Eken

Şen

Eskitaşçıoğlu

et al. 2016

Journal of Endodontics

View full text Add to dashboard Cite

“…All of the materials were considered to be homogeneous, isotropic and linear elastic, and their properties are reported in Table 1. [22][23][24] Note that the elastic modulus of dentine in the cervical, middle and apical locations of both groups was obtained from the nano-indentation measurement. Table 2 shows that the nano-hardness and elastic modulus of both old and young dentine decreased from the cervical root to the apex (P < 0.05).…”

Section: Finite Element (Fe) Analysismentioning

confidence: 99%

The effects of ageing on the biomechanical properties of root dentine and fracture

Zheng

Shao

et al. 2014

Journal of Dentistry

View full text Add to dashboard Cite

j o u r n a l o f d e n t i s t r y 4 2 ( 2 0 1 4 ) 3 0 5 -3 1 1 a r t i c l e i n f o Objectives: Knowledge of the mechanical behaviour of root dentine can facilitate better understanding of spontaneous vertical root fracture (VRF), an age-related disease initiated mainly at the root apex. We tested the hypothesis that the biomechanical properties of root dentine change with ageing.Methods: Sixteen human premolars were divided into ''old'' (17-30 years) and ''young'' (50-80 years) groups. The elastic modulus, nano-hardness, micro-hardness, elemental contents, tubular density/area of root dentine in cervical, middle and apical root regions were evaluated using atomic force microscopy-based nano-indentation, Knoop indentation, scanning electron microscopy and energy dispersive X-ray spectroscopy, respectively. Results:The apical dentine showed a lower nano-hardness, a lower elastic modulus, a lower calcium content, a lower calcium-to-phosphorus ratio and a smaller tubular density/area than the cervical dentine in both age groups, whereas spatial differences in micro-hardness were observed only in old roots. Compared with young dentine, old dentine showed a greater hardness, a higher elastic modulus, a greater mineral content and a smaller tubular size in the cervical portion, whereas the age-induced changes in tubular density were insignificant. Finite element analysis revealed that due to its higher elastic modulus, old apical dentine has a higher stress level than young dentine. Conclusions:The intrinsic material properties of root dentine have spatial variations, and they are altered by ageing. The higher stress level in old apical dentine may be one reason, if not the most important one, why spontaneous VRFs are more likely to occur in the elderly population.

show abstract

“…14 The mean value used in the literature, a thickness of 0.2 mm, was assumed for the PDL. 15 The dimensions of the PDL and supporting structures in the 3D model were identified using SolidWorks software (version 2013; Dassault Syste`mes Corp., Waltham, MA, USA).…”

Section: Construction Of 3d Finite Element Modelmentioning

confidence: 99%

Effect of thermoplastic appliance thickness on initial stress distribution in periodontal ligament

Liu

Chen

2015

Advances in Mechanical Engineering

View full text Add to dashboard Cite

A numerical investigation into the initial stress distribution induced within the periodontal ligament by thermoplastic appliances with different thicknesses is performed. Based on the plaster model of a 25-year-old male patient, a finite element model of the maxillary lateral incisors and their supporting structures is constructed. In addition, four finite element models of thermoplastic appliances with different thicknesses in the range of 0.5-1.25 mm are also constructed based on the same plaster model. Finite element analysis simulations are performed to examine the effects of the force delivered by the thermoplastic appliances on the stress response of the periodontal ligament during the elastic recovery process. The results show that the stress induced in the periodontal ligament increases with an increasing appliance thickness. For example, the stress triples from 0.0012 to 0.0038 MPa as the appliance thickness is increased from 0.75 to 1.25 mm. The results presented in this study provide a useful insight into as a result of the compressive and tensile stresses induced by thermoplastic appliances of different thicknesses. Moreover, the results enable the periodontal ligament stress levels produced by thermoplastic appliances of different thicknesses to be reliably estimated.

show abstract

Effects of cementum–dentine junction and cementum on the mechanical response of tooth supporting structure

Cited by 25 publications

References 51 publications

Evaluation of the Effect of Rotary Systems on Stresses in a New Testing Model Using a 3-Dimensional Printed Simulated Resin Root with an Oval-shaped Canal: A Finite Element Analysis Study

Evaluation of the Effect of Rotary Systems on Stresses in a New Testing Model Using a 3-Dimensional Printed Simulated Resin Root with an Oval-shaped Canal: A Finite Element Analysis Study

The effects of ageing on the biomechanical properties of root dentine and fracture

Effect of thermoplastic appliance thickness on initial stress distribution in periodontal ligament

Contact Info

Product

Resources

About