Age-related transparent root dentin: mineral concentration, crystallite size, and mechanical properties

Kinney, J.H.; Nalla, Ravi K.; Pople, John A.; Breunig, T.M.; Ritchie, Robert O.

doi:10.1016/j.biomaterials.2004.09.004

Cited by 216 publications

(218 citation statements)

References 42 publications

Supporting

Mentioning

194

Contrasting

Unclassified

Order By: Relevance

“…The effects of aging and its related changes on the physical properties of biomaterials, such as dentine, have been noticed (Kinney et al, 2005). Similar changes in the mechanical properties of enamel have been found with aging (Park et al, 2008b;Cardoso et al, 2009).…”

Section: Introductionmentioning

confidence: 75%

Spatial distribution of the human enamel fracture toughness with aging

Zheng

Song

et al. 2013

Journal of the Mechanical Behavior of Biomedical Materials

View full text Add to dashboard Cite

Enamel AgingMineral content a b s t r a c t A better understanding of the fracture toughness (KIC) of human enamel and the changes induced by aging is important for the clinical treatment of teeth cracks and fractures. We conducted microindentation tests and chemical content measurements on molar teeth from "young" (18≤age≤25) and "old" (55≤age) patients. The KIC and the mineral contents (calcium and phosphorus) in the outer, the middle, and the inner enamel layers within the cuspal and the intercuspal regions of the crown were measured through the Vickers toughness test and Energy Dispersive X-Ray Spectroscopy (EDS), respectively. The elastic modulus used for the KIC calculation was measured through atomic force microscope (AFM)-based nanoindentation tests. In the outer enamel layer, two direction-specific values of the KIC were calculated separately (direction I, crack running parallel to the occlusal surface; direction II, perpendicular to direction I). The mean KIC of the outer enamel layer was lower than that of the internal layers (po0.05). No other region-related differences in the mechanical properties were found in both groups. In the outer enamel layer, old enamel has a lower KIC, II and higher mineral contents than young enamel (po0.05). The enamel surface becomes more prone to cracks with aging partly due to the reduction in the interprismatic organic matrix observed with the maturation of enamel.

show abstract

Section: Introductionmentioning

confidence: 75%

Spatial distribution of the human enamel fracture toughness with aging

Zheng

Song

et al. 2013

Journal of the Mechanical Behavior of Biomedical Materials

View full text Add to dashboard Cite

show abstract

“…1 Physiological changes resulting from dentin aging or changes in response to caries and other aggressive stimuli increase the degree of mineralization of dentin, with a consequent increase in dentin thickness and reduction of dentin permeability. [2][3][4] Since dentin permeability is an important factor in the adhesion process, reduction of permeability with age may have a direct effect on dentin bond strengths.…”

Section: Introductionmentioning

confidence: 99%

“…[2][3][4] Since dentin permeability is an important factor in the adhesion process, reduction of permeability with age may have a direct effect on dentin bond strengths. 1,5 In spite of increased dentin calcification with age, adhesion studies [6][7][8][9] have not shown an obvious correlation between dentin age and bonding ability of dentin adhesives.…”

Section: Introductionmentioning

confidence: 99%

Effect of Substrate Age and Adhesive Composition on Dentin Bonding

Perdigão

Sezinando

Monteiro

2013

Operative Dentistry

View full text Add to dashboard Cite

The bonding efficacy of current dentin adhesives is not affected by the dentin substrate age. Chemical bonding may play a role in the bonding effectiveness of specific adhesives. SUMMARYPurpose: To study the effect of dentin age and adhesive composition on the microtensile dentin bond strengths (lTBS) of five dentin adhesives.Materials and Methods: Sixty extracted caries-free human teeth were assigned to the appropriate age group: less than 21 years of age (,21), 21-40 years of age (21-40), and greater than 40 years of age (.40). For each age group, specimens were randomly divided into five dentin adhesives: (1) Adper Easy Bond (EB, 3M ESPE), a one-step self-etch adhesive; (2) Experimental Adper Easy Bond without the Vitrebond Co-polymer (CP) (EBnoCP, 3M ESPE); (3) Adper Single Bond Plus (SB, 3M ESPE), a two-step etch&rinse adhesive; (4) Experimental Adper Single Bond Plus without CP (SBnoCP, 3M ESPE); and (5) Adper Scotchbond Multi-Purpose (MP, 3M ESPE), a threestep etch&rinse adhesive, as the control group. Specimens were sectioned in X and Y directions and the resulting beams were tested to failure in tension mode at a crosshead speed of 1 mm/min. Statistical analysis was computed using t-test and two-way analysis of variance followed by Fisher least significant difference multiple comparison post hoc test at p , 0.05.Results: The highest mean lTBS values were obtained in the control group (MP) for all age groups. EB resulted in statistically similar mean lTBS compared to EBnoCP for all age groups: p = 0.538 for (,21); p = 0.974 for (21-40); and p = 0.909 for (.40). SB resulted in statistically higher mean lTBS than SBnoCP for all age groups [p,0.009 for (,21); p,0.028 for (21-40); and p,0.041 for (.40)]. MP, the control group, resulted in statistically lower mean lTBS when applied to the oldest age group

show abstract

“…Table 5 summarizes the major mechanical features of a tooth [5,[54][55][56][57][58]. In general, the tooth mechanical properties are dependent on the patient's age [57,59,60]; therefore, the choice of one particular material for dental applications rather than another one should ideally be done by taking into account this parameter. Table 5.…”

Section: Discussionmentioning

confidence: 99%

“…The toughness of traditional glass-ceramics is usually below 1 MPa·m 1/2 , and hence the fracture toughness of most bioceramics proposed in the literature is still far from being appropriate to produce artificial tooth roots. Moreover, it should be considered that the periodontal ligament contributes roughly 1 MPa·m 1/2 to the fracture toughness in the sound tooth, as it acts to sustain part of the applied load [59]. Thanks to its excellent bioactivity, strength, and toughness, TT-CEL2 may be suggested for a tooth root replacement.…”

Section: Discussionmentioning

confidence: 99%

Production and Characterization of Glass-Ceramic Materials for Potential Use in Dental Applications: Thermal and Mechanical Properties, Microstructure, and In Vitro Bioactivity

Baino

Verné

2017

Applied Sciences

View full text Add to dashboard Cite

Abstract:Multicomponent silicate glasses and their corresponding glass-ceramic derivatives were prepared and tested for potential applications in dentistry. The glasses were produced via a melting-quenching process, ground and sieved to obtain fine-grained powders that were pressed in the form of small cylinders and thermally treated to obtain sintered glass-ceramic samples. X-ray diffraction investigations were carried out on the materials before and after sintering to detect the presence of crystalline phases. Thermal analyses, mechanical characterizations (assessment of bending strength, Young's modulus, Vickers hardness, fracture toughness), and in vitro bioactivity tests in simulated body fluid were performed. On the basis of the acquired results, different potential applications in the dental field were discussed for the proposed glass-ceramics. The use of such materials can be suggested for either restorative dentistry or dental implantology, mainly depending on their peculiar bioactive and mechanical properties. At the end of the work, the feasibility of a novel full-ceramic bilayered implant was explored and discussed. This implant, comprising a highly bioactive layer expected to promote osteointegration and another one mimicking the features of tooth enamel, can have an interesting potential for whole tooth substitution.

show abstract

Age-related transparent root dentin: mineral concentration, crystallite size, and mechanical properties

Cited by 216 publications

References 42 publications

Spatial distribution of the human enamel fracture toughness with aging

Spatial distribution of the human enamel fracture toughness with aging

Effect of Substrate Age and Adhesive Composition on Dentin Bonding

Production and Characterization of Glass-Ceramic Materials for Potential Use in Dental Applications: Thermal and Mechanical Properties, Microstructure, and In Vitro Bioactivity

Contact Info

Product

Resources

About