Influence of Dentin on Bonding of Composite Resin

Kimura, Sumio; Shimizu, Takeyoshi; Fujii, B

doi:10.4012/dmj.4.68

Cited by 25 publications

(1 citation statement)

References 6 publications

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“…In this study we used bovine dentin. Although there may be some differences between bovine cementum and human cementum, it has been reported that the tensile bond strength of resin composite to bovine dentin was similar to that of human dentin under the same conditions 22. Hence we are of the opinion that information about 4‐META/MMA‐TBB resin adhesion to cementum using bovine cementum is valid to make inferences for human study.…”

Section: Discussionmentioning

confidence: 86%

Hybrid layer seals the cementum/4‐META/MMA‐TBB resin interface

et al. 2006

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Although 4-META/MMA-TBB resin has adhesive properties to dentin, and has been clinically used for the bonding treatment of vertically fractured roots and apicoectomy, there has not been any investigation on the adhesion of 4-META/MMA-TBB resin to cementum. The purpose of this in vitro study was to evaluate the bonding and the sealing ability of 4-META/MMA-TBB resin to cementum. Bovine root cementum and dentin surfaces were treated with a citric acid and ferric chloride solution, and the 4-META/MMA-TBB resin was applied on the treated surfaces before testing. The microtensile bond strength and the leakage levels obtained for the cementum were almost equal to those for the dentin. In SEM and TEM observations, a hybrid layer approximately 2-3 m in thickness was observed at the interface between the resin and the cementum. It is concluded that 4-META/MMA-TBB resin adhered to cementum via a hybrid layer on cementum, as previously reported for dentin.

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Section: Discussionmentioning

confidence: 86%

Hybrid layer seals the cementum/4‐META/MMA‐TBB resin interface

et al. 2006

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Effect of the tooth microstructure on the shear bond strength of a dental composite

Panighi

G’Sell

1993

J. Biomed. Mater. Res.

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Plane human enamel and dentin surfaces were used for microstructural investigation and shear bond testing. The dental tissue microstructure was characterized through the surface topology, the concentration in mineral elements (determined by electron microprobe analysis), and the Vickers microhardness for the same dental tissue. The etched prismatic enamel presents a surface roughness of about 200% of the apparent area, while the intertubular surface fraction of the dentin is, on the average, equal to 75%. The calcium concentration lies between 23.2 and 37.8% of the enamel total mineral content, and 18.5 and 28.2% of the dentin. The microhardness varies from 205 to 378 Hv for the enamel and from 37 to 98 Hv for the dentin. Also, the shear bond strength to a chemosetting adhesive/composite system varies from 10.4 to 23.9 MPa for the enamel and from 0.0 to 5.0 MPa for the dentin. It is shown that the shear bond strength is strongly correlated to the microhardness through a simple linear equation valid for both enamel and dentin surfaces. In turn, the microhardness is correlated to the calcium concentration through two distinct linear relations. These correlations lead to the intrinsic dependence of the shear bond strength on the calcium concentration of the dental tissue, providing that corrections are applied to the bond strength data in order to take into consideration the effective solid area of the adherend and the polymerization retraction stress. Consequently, it is proposed that the adhesion mechanisms for the both enamel and the dentin are controlled, to a major extent, by the mineral content and the surface topology of the tooth.

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