Relationship between thin-film bond strength as measured by a scratch test, and indentation hardness for bonding agents

Kusakabe, Shusuke; Rawls, H. Ralph; Hotta, Mikinori

doi:10.1016/j.dental.2015.11.006

Cited by 26 publications

(17 citation statements)

References 25 publications

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“…Hardness tests are fast, simple, user-friendly and can be correlated to other mechanical properties, e.g. Young’s modulus [8], thin-film bond strength [9] and shear bond strength [10]. Hardness can also be determined by micro- and nano-indentation techniques [8, 10, 11].…”

Section: Introductionmentioning

confidence: 99%

The interrelationship of microstructure and hardness of human coronal dentin using reference point indentation technique and micro-Raman spectroscopy

et al. 2017

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Objectives The aim of this paper is to determine the interrelationship between the microstructure--in terms of chemical composition and crystallinity--to the microhardness of coronal dentin. Methods Dentin microhardness was tested by a novel reference point indenter and compared to the traditional Knoop hardness method. Micro-Raman spectroscopy was used to determine the chemical composition and crystallinity of dentin. Results From the occlusal groove to the border of the coronal pulp chamber, dentin hardness decreased from superficial dentin (SD) to deep dentin (DD). Mineral/organic matrix ratios (phosphate/C-H and phosphate/amide I) also decreased from SD to DD; however, this change was significant (P<0.05) in the phosphate/amide I ratio only. The phosphate/carbonate ratio decreased significantly by varying position from SD to DD. The degree of the crystallinity, as measured by the full width at half maximum (FWHM) of the peak at 960cm−1, decreased significantly going from superficial to deep dentin. Significance For the first time, the interrelationship between the microstructure and the mechanical properties of coronal dentin was determined by using the novel reference point indentation technique and micro-Raman spectroscopy. We hypothesize that the decrease in hardness from superficial to deep dentin can potentially be explained by decreased mineral content and increased carbonate content, which is also associated with decreased crystallinity. Collectively, there is a positive association between dentin hardness and mineral content and a negative association between dentin hardness and carbonate content.

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Section: Introductionmentioning

confidence: 99%

The interrelationship of microstructure and hardness of human coronal dentin using reference point indentation technique and micro-Raman spectroscopy

et al. 2017

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“…Tensile and shear bond strength tests are the major ones used for evaluation of bond strength. However, these tests do not accurately reflect adhesive failure between the bonding agent and tooth surface, because these tests show various modes of failure 10) . This new scratch test measured the force needed to delaminate a thin-film adhesive from the surface and expressed the bond strength between bonding agent and tooth surface.…”

Section: Discussionmentioning

confidence: 99%

“…Other composite samples on enamel or dentin did not show any decrease in bonding strength due to erosion. For determining bond strength by use of the scratch test, the required force for delamination from the base material (enamel or dentin) of thin-film composite specimens is taken as the bond strength 10) . In the present study, the composite materials were used as a coating material on the tooth surface, and so we considered that the scratch test might be useful for our objective.…”

Section: Discussionmentioning

confidence: 99%

“…The scratch test for bond strength was performed on each sample according to previous reports 9,10) . Briefly, a diamond indenter was slid along each test specimen at a sliding speed of 5.25 mm/min with loads of 0-30 N. This sliding was performed for a length of approximately 7 mm by using a thin-film bond strength measurement system (Auto scratch testing machine, CSEM Instruments, Peseux, Switzerland, Fig.…”

Section: Scratch Test For Bond Strengthmentioning

confidence: 99%

“…Most reports on the bonding between enamel or dentin and resin composites showed the results obtained by use of tests for tensile bond strength or shear bond strength. Kusakabe et al 9,10) reported a new scratch test for assessing the bonding strength of dentin adhesives. In this scratch test (thin-film bond strength test), an indenter is drawn across the coated surface under incremental and progressive loading to generate a scratch.…”

Section: Introductionmentioning

confidence: 99%

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Use of new scratch test and tensile test for evaluation of bond strength of selfadhesive flowable resin composite for repair of artificial tooth erosion

et al. 2020

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The purpose of this study was to use a new scratch test and tensile test to evaluate the bond strength between artificial erosive enamel or dentin and self-adhesive resin composites as a coating material. Coronal enamel or dentin surface was exposed to an erosive cycle (artificial saliva [AS], pH:7.0 for 6.5 h and acidic carbonated beverages for 5 min, alternated 3 times per day) for the eroded-surface or stored in AS for the remineralized-surface. Two self-adhesive flowable resin composites, Fusio and LLB-CR6 (prototype), and a conventional flowable resin composite, BEAUTIFIL FLOW with self-etching primer system, Clearfil Mega Bond, were applied to enamel or dentin surfaces; and then the bond strengths were measured. For the eroded-surface, there were no significant differences in bonding strength among all materials, as assessed by the new scratch test. Thus, these self-adhesive flowable resin composites might be useful for coating materials on acid-eroded tooth surfaces.

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Rolling Contact Fatigue and Thermal Spraying Technique

Piao,

Ding,

Hou

et al. 2024

Advanced Topics in Science and Technology in China

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Relationship between thin-film bond strength as measured by a scratch test, and indentation hardness for bonding agents

Cited by 26 publications

References 25 publications

The interrelationship of microstructure and hardness of human coronal dentin using reference point indentation technique and micro-Raman spectroscopy

The interrelationship of microstructure and hardness of human coronal dentin using reference point indentation technique and micro-Raman spectroscopy

Use of new scratch test and tensile test for evaluation of bond strength of selfadhesive flowable resin composite for repair of artificial tooth erosion

Rolling Contact Fatigue and Thermal Spraying Technique

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