Deformation behaviour of aged coronal dentin

Montoya, Carolina; Arola, D.; Ossa, E.A.

doi:10.1111/ger.12321

Cited by 4 publications

(3 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The rigours of caries, tooth surface loss, wear and tear, age and loss of pulp vitality lead to a greater susceptibility of teeth to fracture in later life. This appears to be mediated by a combination of factors, including unfavourable changes in the architecture of the tooth due to dentine loss (Hansen and Asmussen, 1993;Mondelli et al, 1980;Reeh et al, 1989;Zelic et al, 2015), the mineral content of dentine (Nalla et al, 2003;Zelic et al, 2014), collagen cross-linking in dentin (Miura et al, 2014;Montoya et al, 2018;Yan et al, 2017) and pulpal proprioception (Bleicher, 2014;Byers and Cornel, 2018;Randow and Glantz, 1986).…”

Section: Introductionmentioning

confidence: 99%

The effect of NaOCl and heat treatment on static and dynamic mechanical properties and chemical changes of dentine

Karunanayake

Knowles³

et al. 2019

Journal of the Mechanical Behavior of Biomedical Materials

View full text Add to dashboard Cite

Objectives: To determine the effect of heat on flexural strength (FS), maximum strain (MS), storage modulus (SM), tan delta (TD) and chemical changes through micro-Raman spectroscopy of dentine exposed to 2.5% NaOCl or saline. Methodology: Dentine bars were randomly allocated to 8 test groups. Half (groups 2,4,6,8) were treated with NaOCl for 20 mins; the rest (groups 1,3,5,7) remained in saline. FS/MS were measured in groups 1-4 (n=15) (3/4 were also heated to 200°C & re-hydrated in saline). Micro-Raman spectroscopy was performed on bars from groups 1-4. SM/TD were measured in 5-8: in 5/6 (n=10), repeated after heating (200°C), then following re-hydration; in 7/8 (n=3) after heating to 25−185°C. Results: Increase in MS on heat and FS/MS on heat+NaOCl was not significant (P>0.05). SM increased (P=0.06) after heat treatment but reduced to initial state after rehydration (P=0.03). TD did not change (P=0.4) after heat (200°C) treatment but rehydration increased it compared with pre-treatment state (P=0.001). For dentine bars pre-treated with NaOCl, SM did not change (P=0.6) after heat (200°C) treatment or rehydration but TD significantly increased (P=0.02) upon re-hydration compared with pre-(P=0.007), or post-(P=0.03) heattreatment states. SM and TD varied between 25−185°C with no consistent trend amongst the NaOCl pre-treated bars. Micro-Raman only detected chemical changes following NaOCl treatment in the mineral phase. Conclusions: Exposure of dentine bars to heat and NaOCl produced only moderate changes to quasi-static but marked changes to viscoelastic properties, which may be explained by chemical alterations.

show abstract

Section: Introductionmentioning

confidence: 99%

The effect of NaOCl and heat treatment on static and dynamic mechanical properties and chemical changes of dentine

Karunanayake

Knowles³

et al. 2019

Journal of the Mechanical Behavior of Biomedical Materials

View full text Add to dashboard Cite

show abstract

“…A small proportion of less organized secondary dentin is formed throughout life, but tubules tend to be continuous throughout old and new dentin and the degree of mineralization remains similar (Nanci, 2017). Resulting from the reprecipitation of minerals from the intertubular dentin region, dentin tubules also slowly fill with calcified material over time without changing the overall mineral make-up of the tooth (Montoya et al, 2018;Nalla et al, 2005;Porter et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Dentin hardness differences across various mammalian taxa

Geissler

McGraw

Daegling

2021

Journal of Morphology

View full text Add to dashboard Cite

Differences in dentin microstructure have been used as a tool for dietary reconstruction; however, the extent that diet is associated with this aspect of dental morphology has yet to be empirically tested. We conducted microhardness tests of mammalian dentin sections, hypothesizing that species with adaptations to particularly hard diets would have softer dentin, owing to a higher proportion of soft intertubular dentin. Species adapted to abrasive diets, in contrast, should have harder dentin, resulting from a higher proportion of hypermineralized peritubular dentin. We examined molar dentin hardness in ten mammalian taxa with durophagous diets, abrasive diets, and a comparative "control" group of mechanical generalists. Samples included six primate taxa and four non-primate species representing various dietary regimes. Our results reveal significant variation among taxa in overall hardness, but the data do not distinguish between hard and abrasive diets. Several taxa with generalized (i.e., mechanically diverse) diets resemble each other in exhibiting large variance in hardness measurements and comparably soft dentin. The high variation in these species appears to be either a functional signal supporting the niche variation hypothesis or indicate the absence of sustained unidirectional selective pressure. A possible phylogenetic signal of dentin hardness in the data also holds promise for future systematic investigations.

show abstract

“…Aging is a physiological process that has a profound impact on the biology and function of the human body, including structural changes in the teeth that affect the composition and mechanical properties of dentin [9]. For example, aging causes calcification of dentin owing to the deposition of apatite in dentin tubules and advanced glycation end products (AGEs) in collagen fibers, which alter the mechanical properties, such as increase in the elastic modulus of dentin [10][11][12]. In addition to age, differences in dentin composition based on sex and the presence of diseases such as uremia have been reported [13][14][15].…”

mentioning

confidence: 99%

Advanced statistical analyses to reduce inconsistencies in bond strength data focused on donor factors: A six-factor analysis using linear mixed and nonlinear regression models

Yamanaka,

Mine,

Shintani

et al. 2024

J Prosthodont Res

View full text Add to dashboard Cite

For resin composite restorations that rely on bonding to tooth structures, it is necessary to improve the bonding ability of adhesive systems in restorative treatments with highly predictable results. In recent years, adhesives have been actively developed, thereby requiring a more accurate evaluation of bonding ability. Therefore, evaluating bond strength is an important step in predicting the clinical performance of new adhesives[1]. The microtensile bond strength (μTBS) test is one of the most commonly used methods for evaluating bonding effectiveness[2]. It is considered reliable because the adhesion test data correlate with clinical research data, and numerous specimens for the μTBS test can be prepared from a single tooth[3]. However, the bond strength obtained from the μTBS test is affected by several factors other than the performance of adhesives[4-6]. Minamino et al.[4] elucidated the factors affecting μTBS values, such as part of the dentin, bonding area, presence of voids at the interface, computed tomography (CT) values of dentin, and individual differences in tooth-affected J Prosthodont Res. 2024; **(**):

show abstract

Deformation behaviour of aged coronal dentin

Abstract: A decrease in the deformation ability of aged dentin was found. This behaviour could be a result of a dissolution process and reprecipitation of the minerals present in intertubular dentin into the dentinal tubules.

Cited by 4 publications

References 30 publications

The effect of NaOCl and heat treatment on static and dynamic mechanical properties and chemical changes of dentine

The effect of NaOCl and heat treatment on static and dynamic mechanical properties and chemical changes of dentine

Dentin hardness differences across various mammalian taxa

Advanced statistical analyses to reduce inconsistencies in bond strength data focused on donor factors: A six-factor analysis using linear mixed and nonlinear regression models

Contact Info

Product

Resources

About