The Effect of Local Interfacial Geometry on the Measurement of the Tensile Bond Strength to Dentin

Noort, Richard van; Cardew, G. E.; Howard, I. C.; Noroozi, S.

doi:10.1177/00220345910700050501

Cited by 214 publications

(134 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Along with the improvement in bond strength of the current generation dentin bonding agents, cohesive failure in dentin during shear bond strength tests was observed more frequently 14) . However, rather than improvement in the material properties, the test mechanics of the shear test set-up, such as loading condition [15][16][17] and small changes in the geometric arrange- 18,19) , was suggested to cause the variations in strength values and cohesive fracture in dentin.…”

Section: ⅳ Discussionmentioning

confidence: 99%

Effect of cavity shape, bond quality and volume on dentin bond strength

Kim

Lee

Lim

et al. 2005

J Korean Acad Conserv Dent

View full text Add to dashboard Cite

The aim of this study was to evaluate the effect of cavity shape, bond quality of bonding agent and volume of resin composite on shrinkage stress developed at the cavity floor. This was done by measuring the shear bond strength with respect to iris materials (cavity shape; adhesive-coated dentin as a high C-factor and Teflon-coated metal as a low C-factor), bonding agents (bond quality; Scotchbond TM Multi-purpose and Xeno � III) and iris hole diameters (volume; 1 ㎜ or 3 ㎜ in diameter × 1.5 ㎜ in thickness). Ninety-six molars were randomly divided into 8 groups (2 × 2 × 2 experimental setup). In order to simulate a Class I cavity, shear bond strength was measured on the flat occlusal dentin surface with irises. The iris hole was filled with Z250 restorative resin composite in a bulk-filling manner. The data was analyzed using three-way ANOVA and the Tukey test. Fracture mode analysis was also done. When the cavity had high C-factor, good bond quality and large volume, the bond strength decreased significantly. The volume of resin composite restricted within the well-bonded cavity walls is also be suggested to be included in the concept of C-factor, as well as the cavity shape and bond quality. Since the bond quality and volume can exaggerate the effect of cavity shape on the shrinkage stress developed at the resin-dentin bond, resin composites must be filled in a method, which minimizes the volume that can increase the C-factor. [J Kor Acad Cons Dent 30(6):450-460, 2005]

show abstract

Section: ⅳ Discussionmentioning

confidence: 99%

Effect of cavity shape, bond quality and volume on dentin bond strength

Kim

Lee

Lim

et al. 2005

J Korean Acad Conserv Dent

View full text Add to dashboard Cite

show abstract

“…This might be due to the fact that the bonding agents were coated on the entire dentin area. Van Noort et al 13) had reported a two fold increase in shear bond strengths when coating the entire dentin area over those measured on a constrained area. Thus, in the iris method, the area must be measured after debonding and the shear bond strength should be calculated by dividing the maximum applied force by the measured area.…”

Section: ⅳ Discussionmentioning

confidence: 99%

“…Finite element analysis has been used to describe the distribution of interfacial shear stresses 5,8,9,13) . From these it appears that the interfacial shear stresses are highly non-uniform and strongly influenced by bonding geometry, loading conditions and the mismatch in elasticity among the bonded layers.…”

Section: ⅳ Discussionmentioning

confidence: 99%

The effect of cavity wall property on the shear bond strength test using iris method

Kim

Bae

Cho

et al. 2004

J Korean Acad Conserv Dent

View full text Add to dashboard Cite

Objectives: In the unique metal iris method, the developing interfacial gap at the cavity floor resulting from the cavity wall property during polymerizing composite resin might affect the nominal shear bond strength values. The aim of this study is to evaluate that the iris method reduces the cohesive failure in the substrates and the cavity wall property effects on the shear bond strength tests using iris method.Materials and Methods: The occlusal dentin of 64 extracted human molars were randomly divided into 4 groups to simulate two different levels of cavity wall property (metal and dentin iris) and two different materials (ONE-STEP � and ALL-BOND � 2) for each wall property. After positioning the iris on the dentin surface, composite resin was packed and light-cured. After 24 hours the shear bond strength was measured at a crosshead speed of 0.5 mm/min. Fracture analysis was performed using a microscope and SEM. The data was analyzed statistically by a two-way ANOVA and t-test.Results: The shear bond strength with metal iris was significant higher than those with dentin iris (p = 0.034). Using ONE-STEP � , the shear bond strength with metal iris was significant higher than those with dentin iris (p = 0.005), but not in ALL-BOND � 2 (p = 0.774). The incidence of cohesive failure was very lower than other shear bond strength tests that did not use iris method.Conclusions: The iris method may significantly reduce the cohesive failures in the substrates. According to the bonding agent systems, the shear bond strength was affected by the cavity wall property.

show abstract

“…It should be mentioned that a gradation exists in both morphology and mechanical properties from the dentin-enamel junction to the outer layer of enamel. When doing mechanical tests, such as the tensile strength test, stress distributions may be strongly influenced by factors such as loading characteristics and specimen size 14) . Thus, one must expect uneven stress distributions and acknowledge that the mechanical values reported are nominal values which require cautious interpretation.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Bleaching on the Elastic Modulus of Bovine Enamel

et al. 2007

View full text Add to dashboard Cite

The purpose of this study was to determine the elastic modulus of enamel during bleaching procedure with the use of an ultrasonic device. Enamel sections were obtained from freshly extracted bovine incisors. Specimens were exposed to 10％ carbamide peroxide for two hours, followed by an application of a fluoride-containing toothpaste for five minutes and stored in artificial saliva (pH 7.0). An ultrasonic device was used to measure the sound velocities of longitudinal and shear waves as well as elastic modulus. The mean elastic modulus of bleached enamel decreased with time, from 15.5 GPa to 10.1 GPa. Conversely, the elastic modulus of bleached enamel followed by application of a fluoride-containing toothpaste increased with time, from 15.2 GPa to 20.2 GPa. Results of this study indicated that a decrease in elastic modulus associated with bleaching occurred, and that fluoride-containing toothpaste reversed this effect.

show abstract

The Effect of Local Interfacial Geometry on the Measurement of the Tensile Bond Strength to Dentin

Cited by 214 publications

References 4 publications

Effect of cavity shape, bond quality and volume on dentin bond strength

Effect of cavity shape, bond quality and volume on dentin bond strength

The effect of cavity wall property on the shear bond strength test using iris method

The Effect of Bleaching on the Elastic Modulus of Bovine Enamel

Contact Info

Product

Resources

About