Creep and Viscoelastic Behaviour of Human Dentin
Statement of Problem: Biomechanics of the human dentition is inherently complex.Purpose: The aim of this study is to investigate, in vitro, the creep and the recovery of dentin under static uniaxial compressive stress conditions.Materials and Methods: Specimens of cylindrical morphology were prepare...
Main Authors: | , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Tehran University of Medical Sciences
2004-03-01
|
Series: | Journal of Dentistry of Tehran University of Medical Sciences |
Subjects: | |
Online Access: | http://journals.tums.ac.ir/upload_files/pdf/601.pdf |
id |
doaj-a4ea6783fa89458cacca9c7957a10f12 |
---|---|
record_format |
Article |
spelling |
doaj-a4ea6783fa89458cacca9c7957a10f122020-11-25T03:23:10ZengTehran University of Medical SciencesJournal of Dentistry of Tehran University of Medical Sciences 2008-21852004-03-0111514Creep and Viscoelastic Behaviour of Human DentinT.JafarzadehM.ErfanDC.WattsStatement of Problem: Biomechanics of the human dentition is inherently complex.Purpose: The aim of this study is to investigate, in vitro, the creep and the recovery of dentin under static uniaxial compressive stress conditions.Materials and Methods: Specimens of cylindrical morphology were prepared from recently extracted non-carious lower molar teeth, such that the average tubule orientation was axial. Slides of mid- coronal dentin (parallel surfaces, height 1.8 mm) were sectionedwith a slow speed diamond saw and then cut into cylindrical discs. Specimens were stored at 4ºC for 24h to restabilize water content. Creep data were then measured by LVDT axially in water for periods of 2h load + 2h recovery on 4 separate groups (n=6): at two stresses (10 & 18 MPa) and at two temperatures: 37 & 60ºC. Maximum creep strain, permanent set,strain recovery and initial compressive modulus were reported.Results: Compliance values were also calculated and slight non-linearity found at 60ºC.Two-way ANOVA was performed on results. Dentin exhibited a linear viscoelastic response under 'clinical' compressive stress levels , with a maximum strain ~ 1% and highrecoverability: permanent set<0.3%.Conclusion: This established a performance standard for viscoelastic stability of restorative biomaterials, replacing human dentin.http://journals.tums.ac.ir/upload_files/pdf/601.pdfCreep- Viscoelastic Property- Dentin |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
T.Jafarzadeh M.Erfan DC.Watts |
spellingShingle |
T.Jafarzadeh M.Erfan DC.Watts Creep and Viscoelastic Behaviour of Human Dentin Journal of Dentistry of Tehran University of Medical Sciences Creep- Viscoelastic Property- Dentin |
author_facet |
T.Jafarzadeh M.Erfan DC.Watts |
author_sort |
T.Jafarzadeh |
title |
Creep and Viscoelastic Behaviour of Human Dentin |
title_short |
Creep and Viscoelastic Behaviour of Human Dentin |
title_full |
Creep and Viscoelastic Behaviour of Human Dentin |
title_fullStr |
Creep and Viscoelastic Behaviour of Human Dentin |
title_full_unstemmed |
Creep and Viscoelastic Behaviour of Human Dentin |
title_sort |
creep and viscoelastic behaviour of human dentin |
publisher |
Tehran University of Medical Sciences |
series |
Journal of Dentistry of Tehran University of Medical Sciences |
issn |
2008-2185 |
publishDate |
2004-03-01 |
description |
Statement of Problem: Biomechanics of the human dentition is inherently complex.Purpose: The aim of this study is to investigate, in vitro, the creep and the recovery of dentin under static uniaxial compressive stress conditions.Materials and Methods: Specimens of cylindrical morphology were prepared from recently extracted non-carious lower molar teeth, such that the average tubule orientation was axial. Slides of mid- coronal dentin (parallel surfaces, height 1.8 mm) were sectionedwith a slow speed diamond saw and then cut into cylindrical discs. Specimens were stored at 4ºC for 24h to restabilize water content. Creep data were then measured by LVDT axially in water for periods of 2h load + 2h recovery on 4 separate groups (n=6): at two stresses (10 & 18 MPa) and at two temperatures: 37 & 60ºC. Maximum creep strain, permanent set,strain recovery and initial compressive modulus were reported.Results: Compliance values were also calculated and slight non-linearity found at 60ºC.Two-way ANOVA was performed on results. Dentin exhibited a linear viscoelastic response under 'clinical' compressive stress levels , with a maximum strain ~ 1% and highrecoverability: permanent set<0.3%.Conclusion: This established a performance standard for viscoelastic stability of restorative biomaterials, replacing human dentin. |
topic |
Creep- Viscoelastic Property- Dentin |
url |
http://journals.tums.ac.ir/upload_files/pdf/601.pdf |
work_keys_str_mv |
AT tjafarzadeh creepandviscoelasticbehaviourofhumandentin AT merfan creepandviscoelasticbehaviourofhumandentin AT dcwatts creepandviscoelasticbehaviourofhumandentin |
_version_ |
1724607313903353856 |