Stress–strain analysis for evaluating the effect of the orientation of dentin tubules on their mechanical properties and deformation behavior

Han, Chang Fu; Wu, Bo; Chung, Chung Jen; Chuang, Shu Fen; Li, Wang Long; Lin, Jen Fin

doi:10.1016/j.jmbbm.2012.03.009

Cited by 22 publications

(11 citation statements)

References 23 publications

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“…In the specific case of the working angle of 90°, it was expected that the root wear would be even greater because Fy had a higher modulus; however, Fx was absent because cos 90° is 0. No shear force was present, and according to the principles of mechanics, the test is therefore similar to a hardness test . Thus, the root wear and roughness resulting from a working angle of 90° are, theoretically, less than those resulting from a working angle of 60°, and this was also observed in our results.…”

Section: Discussionmentioning

confidence: 99%

The effect of the angle of instrumentation of the Piezoelectric Ultrasonic Scaler on root surfaces

Oliveira

Macedo

Tsurumaki

et al. 2015

Int J Dental Hygiene

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Section: Discussionmentioning

confidence: 99%

The effect of the angle of instrumentation of the Piezoelectric Ultrasonic Scaler on root surfaces

Oliveira

Macedo

Tsurumaki

et al. 2015

Int J Dental Hygiene

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“…It is not evident from the present findings whether cervical tension is caused by wedging forces, hoop forces from cementation, or tooth flexure. The dentin has a Poisson ratio of approximately 0.3, which may cause bulging or distortion of the dentine cervically during occlusal loading . Ceramics are weak in tension and the expanding dentin may create sufficient tensile stress to cause core fracture .…”

Section: Discussionmentioning

confidence: 99%

Fractographic features of glass‐ceramic and zirconia‐based dental restorations fractured during clinical function

Øilo

Hardang

Ulsund

et al. 2014

European J Oral Sciences

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Fractures during clinical function have been reported as the major concern associated with all-ceramic dental restorations. The aim of this study was to analyze the fracture features of glass-ceramic and zirconia-based restorations fractured during clinical use. Twenty-seven crowns and onlays were supplied by dentists and dental technicians with information about type of cement and time in function, if available. Fourteen lithium disilicate glass-ceramic restorations and 13 zirconia-based restorations were retrieved and analyzed. Fractographic features were examined using optical microscopy to determine crack initiation and crack propagation of the restorations. The material comprised fractured restorations from one canine, 10 incisors, four premolars, and 11 molars. One crown was not categorized because of difficulty in orientation of the fragments. The results revealed that all core and veneer fractures initiated in the cervical margin and usually from the approximal area close to the most coronally placed curvature of the margin. Three cases of occlusal chipping were found. The margin of dental all-ceramic single-tooth restorations was the area of fracture origin. The fracture features were similar for zirconia, glass-ceramic, and alumina single-tooth restorations. Design features seem to be of great importance for fracture initiation.

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“…The effect of the orientation of dentine tubules on mechanical properties and deformation is studied by stress-strain profile. Results show that the elastic modulus and the yielding stress and strain at various orientation angles [ 27 ]. Within physiological limits, the strain-stress response of dentine has outstanding features which are similar to cellular solids [ 28 , 29 ].…”

Section: Discussionmentioning

confidence: 99%

The peritubular reinforcement effect of porous dentine microstructure

Wang¹,

Niu²,

Li³

et al. 2017

PLoS ONE

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In the current study, we evaluate the equivalent stiffness of peritubular reinforcement effect (PRE) of porous dentine optimized by the thickness of peritubular dentine (PTD). Few studies to date have evaluated or quantitated the effect of PRE on composite dentine. The miscrostructure of porous dentine is captured by scanning electron microscope images, and then finite element modeling is used to quantitate the deformation and stiffness of the porous dentine structure. By optimizing the radius of PTD and dentine tubule (DT), the proposed FE model is able to demonstrate the effect of peritubular reinforcement on porous dentine stiffness. It is concluded that the dentinal equivalent stiffness is reduced and degraded with the increase of the radius of DT (i.e., porosity) in the certain ratio value of Ep/Ei and certain radius of PTD, where Ep is the PTD modulus and Ei is the intertubular dentine modulus. So in order to ensure the whole dentinal equivalent stiffness is not loss, the porosity should get some value while the Ep/Ei is certain. Thus, PTD prevents the stress concentration around DTs and reduces the risk of DTs failure. Mechanically, the overall role of PTD appears to enhance the stiffness of the dentine composite structure. These results provide some new and significant insights into the biological evolution of the optimal design for the porous dentine microstructure. These findings on the biological microstructure design of dentine materials are applicable to other engineering structural designs aimed at increasing the overall structural strength.

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Stress–strain analysis for evaluating the effect of the orientation of dentin tubules on their mechanical properties and deformation behavior

Cited by 22 publications

References 23 publications

The effect of the angle of instrumentation of the Piezoelectric Ultrasonic Scaler on root surfaces

The effect of the angle of instrumentation of the Piezoelectric Ultrasonic Scaler on root surfaces

Fractographic features of glass‐ceramic and zirconia‐based dental restorations fractured during clinical function

The peritubular reinforcement effect of porous dentine microstructure

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