Punch-Shear Test for Dental Purposes

Roydhouse, Richard H.

doi:10.1177/00220345700490010501

Cited by 62 publications

(36 citation statements)

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“…It has been suggested that this test provides a better evaluation of bond strength than the conventional shear test because in the pushout test, fracture occurs parallel to the dentin-bonding interface, which makes it a true shear test for parallel-sided samples 7,10 . Extrusion testing in dentistry was first described by Roydhouse 11 (1970). Kimura, Shimizu and Fujii 12 (1985) concluded that push-out testing tended to reduce the values for bond strength to dentin.…”

Section: Discussionmentioning

confidence: 99%

Comparative evaluation of push-out bond strength of a MTA-based root canal sealer

Gurgel‐Filho¹,

Leite²,

Lima³

et al. 2014

Braz. J. Oral Sci.

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. Methods: Thirty extracted single-root human teeth of similar sizes and circular canals were prepared using #3 and #2 Gates Glidden drills in the cervical portion of the canal and K3 ® rotary instruments to a size #25/0.06 to working length. Irrigation with 0.5 mL 2% chlorhexidine gel was used before and 1 mL saline after each instrument. The smear layer was removed with 3 mL 17% EDTA for 3 min. The samples were sectioned horizontally into eight 1±0.1 mm-thick serial slices and then the push-out test was carried out. Two-way analysis of variance (ANOVA) and the post-hoc Tukey test were used for the analysis of the data with a significance level of 5%. Results: AH Plus presented significantly higher bond strengths (p<0.05) than the other sealers, while MTA Fillapex showed the lowest bond strengths (p<0.05). Conclusions: The present study concluded that EndoFill ® sealer and MTA FillApex ® core combination were not superior to AH Plus ® sealer and gutta-percha core combination.

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Section: Discussionmentioning

confidence: 99%

Comparative evaluation of push-out bond strength of a MTA-based root canal sealer

Gurgel‐Filho¹,

Leite²,

Lima³

et al. 2014

Braz. J. Oral Sci.

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“…12,13 A variation in results for some materials, particularly in the shear punch test of uncoated Fuji II LC and in the microhardness of coated Fuji II LC, at different time intervals was observed. These results may be related to the complexity of the stress distribution in a specimen during loading by the punch, 8 as well as the possibility of voids existing within the material that could not be detected prior to testing. The existence of undetectable voids will cause differences in the strengths observed.…”

Section: Roydhousementioning

confidence: 99%

Effect of G-Coat Plus on the mechanical properties of glass-ionomer cements

et al. 2013

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Background: Although various mechanical properties of tooth-coloured materials have been described, little data have been published on the effect of ageing and G-Coat Plus on the hardness and strength of the glass-ionomer cements (GICs). Methods: Specimens were prepared from one polyacid-modified resin composite (PAMRC; Freedom, SDI), one resinmodified glass-ionomer cement; (RM-GIC; Fuji II LC, GC), and one conventional glass-ionomer cement; (GIC; Fuji IX, GC). GIC and RM-GIC were tested both with and without applying G-Coat Plus (GC). Specimens were conditioned in 37°C distilled water for either 24 hours, four and eight weeks. Half the specimens were subjected to a shear punch test using a universal testing machine; the remaining half was subjected to Vickers Hardness test. Results: Data analysis showed that the hardness and shear punch values were material dependent. The hardness and shear punch of the PAMRC was the highest and GIC the lowest. Applying the G-Coat Plus was associated with a significant decrease in the hardness of the materials but increase in the shear punch strength after four and eight weeks. Conclusions: The mechanical properties of the restorative materials were affected by applying G-Coat Plus and distilled water immersion over time. The PAMRC was significantly stronger and harder than the RM-GIC or GIC.

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“…The mechanical properties of dental cements have been reported in many studies [1][2][3] . In particular, several researchers have investigated the shear strength of restorative materials using the shear punch test [4][5][6][7][8][9][10][11][12] . Their studies mainly focused on the suitability of the shear test method for restorative filling materials such as resin composites and glass ionomers.…”

Section: Introductionmentioning

confidence: 99%

Effect of Water on Shear Strength of Glass Ionomer Cements for Luting

et al. 2007

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This study examined the effect of ambient water on the shear strength of glass ionomer cements for luting. Disk specimens were fabricated from four commercially available glass ionomer cements with different setting modes. At one hour after the start of mixing, the specimens were stored at 37℃ for 24 and 168 hours in dry condition or in deionized water. Shear strength was then determined using a punch tool. The shear strengths of both conventional cements were significantly greater for the specimens stored dry as compared to those kept in deionized water (p<0.05). Conversely, resin-modified cement specimens stored dry had significantly lower strength compared to the specimens kept in deionized water (p<0.05). This was because the ambient water surrounding the resin-modified glass ionomer cements helped increase the shear strength of the cements under the experimental conditions tested.

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Punch-Shear Test for Dental Purposes

Cited by 62 publications

References 0 publications

Comparative evaluation of push-out bond strength of a MTA-based root canal sealer

Comparative evaluation of push-out bond strength of a MTA-based root canal sealer

Effect of G-Coat Plus on the mechanical properties of glass-ionomer cements

Effect of Water on Shear Strength of Glass Ionomer Cements for Luting

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