Strain gauge method for measuring polymerization contraction of composite restoratives

Effect of chain modifications on the physicomechanical properties of silsesquioxane‐based dental nanocomposites

“…This linear dimensional change is only transferred when the substrate has a measurable modulus (post-gel) to induce stress on the gauge and may therefore be applicable to the measurement of post-gel shrinkage. 42 Linear shrinkage measurements are comparable to shrinkage measurements obtained using a mercury dilatometer. 43 Both methods continuously measure the free shrinking bulk of materials.…”

Effect of chain modifications on the physicomechanical properties of silsesquioxane‐based dental nanocomposites

“…This linear dimensional change is only transferred when the substrate has a measurable modulus (post-gel) to induce stress on the gauge and may therefore be applicable to the measurement of post-gel shrinkage. 42 Linear shrinkage measurements are comparable to shrinkage measurements obtained using a mercury dilatometer. 43 Both methods continuously measure the free shrinking bulk of materials.…”

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“…The biomodification of collagen by extrinsic crosslinkers can induce the formation of additional interand intramolecular cross-links, 31,32 increasing the ultimate tensile strength and elastic modulus of demineralized dentin. 33,34 Cross-linking agents such as proanthocyanidins, glutaraldehyde, and tannic acid are able to 7,35 improve immediate resin-dentin bond strength after 1 hour of treatment, an observation that was not seen in our results. However, we used much shorter periods of treatment.…”

“…32 It has been shown that bond strength is more directly influenced by the type of etching agent than it is by the resin cement. 33 When the ceramics were etched with 7.5% HF, the mean value of lSBS was statistically significantly higher when compared to the values associated with the HF concentration of 1%, although the value associated with the 7.5% concentration was not statistically different from those of the other concentrations. The 7.5% concentration promoted effective dissolution of the vitreous phase in both ceramics.…”

Polymerization shrinkage: effects of boundary conditions and filling technique of resin composite restorations

“…If the cavity volume remained constant during incremental filling, the above argument would be true because the applied volume of resin composite would be larger than the volume of the cavity. 9 However, it has been shown that the deformation of the cavity wall does occur, 29,30 and thus, the cavity deformation may eliminate the benefit of the composite volume gain. This may partially explain why no benefit could be detected with this widespread technique.…”

Effect of chain modifications on the physicomechanical properties of silsesquioxane‐based dental nanocomposites

“…This linear dimensional change is only transferred when the substrate has a measurable modulus (post-gel) to induce stress on the gauge and may therefore be applicable to the measurement of post-gel shrinkage. 42 Linear shrinkage measurements are comparable to shrinkage measurements obtained using a mercury dilatometer. 43 Both methods continuously measure the free shrinking bulk of materials.…”

Full Issue PDF

“…The biomodification of collagen by extrinsic crosslinkers can induce the formation of additional interand intramolecular cross-links, 31,32 increasing the ultimate tensile strength and elastic modulus of demineralized dentin. 33,34 Cross-linking agents such as proanthocyanidins, glutaraldehyde, and tannic acid are able to 7,35 improve immediate resin-dentin bond strength after 1 hour of treatment, an observation that was not seen in our results. However, we used much shorter periods of treatment.…”

“…32 It has been shown that bond strength is more directly influenced by the type of etching agent than it is by the resin cement. 33 When the ceramics were etched with 7.5% HF, the mean value of lSBS was statistically significantly higher when compared to the values associated with the HF concentration of 1%, although the value associated with the 7.5% concentration was not statistically different from those of the other concentrations. The 7.5% concentration promoted effective dissolution of the vitreous phase in both ceramics.…”

Polymerization shrinkage: effects of boundary conditions and filling technique of resin composite restorations

“…If the cavity volume remained constant during incremental filling, the above argument would be true because the applied volume of resin composite would be larger than the volume of the cavity. 9 However, it has been shown that the deformation of the cavity wall does occur, 29,30 and thus, the cavity deformation may eliminate the benefit of the composite volume gain. This may partially explain why no benefit could be detected with this widespread technique.…”

Effect of chain modifications on the physicomechanical properties of silsesquioxane‐based dental nanocomposites

“…This linear dimensional change is only transferred when the substrate has a measurable modulus (post-gel) to induce stress on the gauge and may therefore be applicable to the measurement of post-gel shrinkage. 42 Linear shrinkage measurements are comparable to shrinkage measurements obtained using a mercury dilatometer. 43 Both methods continuously measure the free shrinking bulk of materials.…”

Full Issue PDF

“…The biomodification of collagen by extrinsic crosslinkers can induce the formation of additional interand intramolecular cross-links, 31,32 increasing the ultimate tensile strength and elastic modulus of demineralized dentin. 33,34 Cross-linking agents such as proanthocyanidins, glutaraldehyde, and tannic acid are able to 7,35 improve immediate resin-dentin bond strength after 1 hour of treatment, an observation that was not seen in our results. However, we used much shorter periods of treatment.…”

“…32 It has been shown that bond strength is more directly influenced by the type of etching agent than it is by the resin cement. 33 When the ceramics were etched with 7.5% HF, the mean value of lSBS was statistically significantly higher when compared to the values associated with the HF concentration of 1%, although the value associated with the 7.5% concentration was not statistically different from those of the other concentrations. The 7.5% concentration promoted effective dissolution of the vitreous phase in both ceramics.…”

Polymerization shrinkage: effects of boundary conditions and filling technique of resin composite restorations

“…If the cavity volume remained constant during incremental filling, the above argument would be true because the applied volume of resin composite would be larger than the volume of the cavity. 9 However, it has been shown that the deformation of the cavity wall does occur, 29,30 and thus, the cavity deformation may eliminate the benefit of the composite volume gain. This may partially explain why no benefit could be detected with this widespread technique.…”