Investigations of thermal property gradients in the human dentine

Kishen, Anil; Asundi, Anand

doi:10.1002/1097-4636(200104)55:1<121::aid-jbm160>3.0.co;2-5

Cited by 30 publications

(2 citation statements)

References 12 publications

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“…During cooling below room temperature Q -1 exhibits a very broad maximum due to a series of phase transformations involving water present in the pores, in the interstices between fibers, between fibrils and inside collagen triple helix. These results, presented and discussed in detail in another paper of this special issue [101], are supported by those of other investigators [96,[102][103][104][105][106]. Damping is affected by many factors, in particular it increases if dentin is damaged and structural defects are present [96].…”

Section: Ref K (Mpasupporting

confidence: 75%

Mechanical Characterization of Human Dentin: A Critical Review

Cappelloni

Montanari

2013

KEM

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In the last years, several experimental techniques have been improved to measure mechanical properties of human dentin. Dentin exhibits a behavior like a functionally graded material with properties dependent on tubule density and orientation. This work describes and critically analyzes the elastic, anelastic and plastic characteristics of dentin on the basis of scientific literature, in particular data of Youngs modulus, shear modulus, Poissons ratio, yield and ultimate stress, hardness, fatigue, fracture toughness, creep, stress relaxation and damping have been considered. Finally, a new indentation technique (FIMEC test) is proposed to characterize the mechanical properties of dentin on a local scale.

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Section: Ref K (Mpasupporting

confidence: 75%

Mechanical Characterization of Human Dentin: A Critical Review

Cappelloni

Montanari

2013

KEM

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“…[19] The dentin post closely resembles root dentin in all the physical properties like modulus of elasticity, viscoelastic behavior,[20] compressive strength,[21] thermal expansion[22] etc. Furthermore the fracture toughness of dentin has been found to be better than most of the current restorative materials.…”

Section: Discussionmentioning

confidence: 99%

Ex vivo fracture resistance of endodontically treated maxillary central incisors restored with fiber-reinforced composite posts and experimental dentin posts

Kathuria¹,

Kavitha²,

Khetarpal³

2011

J Conserv Dent

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Aim:To compare the fracture resistance of teeth restored with fiber-reinforced composite (FRC) posts and experimental dentin posts milled from human root dentin.Materials and Methods:Thirty maxillary central incisors were divided into three groups of ten each. Twenty teeth were restored with FRC posts and solid dentin posts and numbered as Groups 2 and 3 respectively while Group 1 acted as the control, without any post. The teeth were loaded at 135° angle to their long axes after core build-up and the failure loads were recorded.Results:One-way Analysis of Variance (ANOVA) and Bonferroni multiple comparisons revealed a significant difference among test groups with the control group showing the highest fracture resistance, followed by the dentin post group and lastly the FRC post group.Conclusions:Teeth restored with dentin posts exhibited better fracture resistance than those restored with FRC posts.

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Experimental investigation on the role of water in the mechanical behavior of structural dentine

Kishen

Asundi

2005

J Biomedical Materials Res

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Dentine is a porous hydrated composite structure that forms the major bulk of the human tooth. The aim of this study was to investigate the role of free water on the in-plane, mechanical strain response in dentine structure. A digital moire interferometry was used for this purpose. It was observed from this experiment that structural dentine demonstrated distinct strain gradients in the axial (perpendicular to the dentinal tubules) and lateral (parallel to the dentinal tubules) directions. The hydrated dentine displayed significant increase in strain with stress in the direction perpendicular to the dentinal tubules, and this response was characteristic of a tough material. On the contrary, the dehydrated dentine, which was dehydrated at 24 degrees C, 55% relative humidity for 72 h showed a strain response characteristic of a brittle material. The strains formed in the direction parallel to the dentinal tubules for hydrated dentine were consistent and did not vary much with increase in applied loads. Upon dehydration, the outer dentine experienced higher strains, and the difference between the outer and inner dentine became more conspicuous with increase in loads. This experiment highlights hydration-induced, distinct in-plane strain gradients in the directions perpendicular and parallel to the dentinal tubules in the dentine structure.

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Investigations of thermal property gradients in the human dentine

Cited by 30 publications

References 12 publications

Mechanical Characterization of Human Dentin: A Critical Review

Mechanical Characterization of Human Dentin: A Critical Review

Ex vivo fracture resistance of endodontically treated maxillary central incisors restored with fiber-reinforced composite posts and experimental dentin posts

Experimental investigation on the role of water in the mechanical behavior of structural dentine

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