Articles Related to bond strength
Effect of ultrasound on bond strength and penetration of resin and ionomeric cements used for fiberglass post cementation
The objective of this study was to evaluate the bond strength of fiberglass posts (Reforpost ®) cemented with RelyX U200 and RelyX Luting 2, with (A) and without (WA) ultrasonic activation in the root canal of bovine teeth. The penetration of the cements into dentine tubules was also assessed. Methods: Forty bovine incisors were selected and endodontically treated, and then divided into 4 groups (n = 10). Fiberglass posts were cemented with RelyX U200 and RelyX Luting 2
and activated with an ITSMO ultrasound insert in 2 groups; the other two groups received no ultrasonic activation. After 24
hours of cementation, the roots were sectioned into slices of approximately 1 mm each. Confocal microscopy and push-out
test were performed, and all specimens were subjected to 200× magnification optical microscopy for mode of failure evaluation. Statistical analysis was done with three-way ANOVA, followed by the Fisher’s test (α = 0.05)
Comparison between Polyacid-Modified Composite Resin and Conventional Composite Resin used for Primary Molars Restoration
Ten recently extracted primary molars, were used in this study for the measurement of the shear bond strength. Occlusal enamel was ground, leaving a flat dentin surface, on which a cylindrical specimen of each of the two tested materials was applied and light-cured according to the manufacturer’s instructions. Specimens were then mounted in self-cure acrylic resin. Ten specimens were used for the measurement of the compressive strength. The specimens were prepared in a special-cylindrical mold, then light-cured according to the manufacturer’s instructions. The compressive and shear bond strength of each specimen was measured using a Universal Testing Machine.Ten specimens of each of the two resin materials were used to measure the abrasion resistance. The test was performed by means of a toothbrushing machine and abrasive dentifrice slurry. The specimens were weighed before and after the test. Weight loss of the specimens were calculated after the test and reported as percent weight loss. Regarding microleakage test, Class V cavities were prepared in the buccal surface of 36 exfoliated or extracted human primary molars.
Effect of Chlorhexidine Application on Dentin Bond Strength Durability of Two Etch-and-Rinse Adhesive versus a Universal Bond System
Application of matrix-metalloproteinases (MMP) inhibitors such as chlorhexidine (CHX) is capable of reducing bond strength loss over time by preventing collagen fibrils degradation.