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Effects of Hybrid Coat Dentin Protective Film on Adhesive Properties of Five Cements in Vitro

Author: Guo
Tutor: FengYunZhi
School: Central South University
Course: Clinical Stomatology
Keywords: Dentin hypersensitivity Dentin protective film Cement Bond strength Microleakage
CLC: R783
Type: Master's thesis
Year: 2011
Downloads: 32
Quote: 0
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Abstract


Objective: To observe Tu Hybrid Coat dentin dentin surface protective film morphology characteristics analysis of the extent of the dentin protective film closed dentinal tubules. Provide the basis for evaluation Hybrid coat dentin protective film on the cement bond strength and microleakage, dentin protective film for clinical use and match the corresponding cements. Methods: premolar extraction for orthodontic Hybrid coat dentin tooth preparation coated with a protective film, microscopic morphology using scanning electron microscopy dentin surface and longitudinal section; premolars and nickel-chromium alloy castings samples tested on a universal testing machine Hybrid coat dentin protective film of zinc phosphate cement (ZPC),, zinc the cement (ZPCC), polycarboxylate, glass ionomer cement (GIC), resin reinforced glass ionomer cement (RMGIC), resin cement (RC ) adhesive bond strength; silver staining Hybrid Coat dentin protective film on RMGIC.RC microleakage; SPSS17.0 software for statistical analysis. Results: 1. Scanning electron microscope to: control group dentinal tubules partly open, Hybrid Coat dentin protective membrane group dentin tubules are occluded, the surface is relatively flat, and may be formed on a thick mixed layer. Bond strength experiment: unused dentin protective film the ZPC, ZPCC. GIC bond strength were 0.746 ± 0.078MPa, 12.363 ± 2.160MPa, 5.284 ± 0.715 MPa, use the dentin protective film three strength decreased to 0.228 ± 0.039MPa, 1.755 ± 0.298MPa, 1.369 ± 0.336MPa, P lt; 0.05, statistically significant compared with the former. Unused dentin protective film RMGIC RC bond strength were 6.413 ± 1.111MPa 8.309 ± 1.139MPa, a dentin protection film after both strength are improved, respectively, is 8.812 ± 1.728MPa 13.309 ± 2.152MPa P lt; 0.05, compared with the former considered statistically significant. Microleakage experiment: unused dentin protective film RMGIC RC microleakage were 2.05 ± 0.14mm, 0.68 ± 0.22mm dentinal protective film after both microleakage decreased to 1.32 ± 0.08 mm, 0.33 ± 0.14mm, P lt; 0.05, statistically significant compared with the former. Conclusion: (1) Hybrid Coat dentin protection film can be closed dentinal tubules form a thick mixed layer. (2) Hybrid coat dentin protective film of cement bonding properties associated with both the composition and bonding mechanism. (3) Hybrid Coat dentin protection film can be reduced ZPC, ZPCC GIC bonding shear strength increase RMGIC, the RC the adhesive shear strength. (4) Hybrid Coat dentin protective film can reduce RMGIC, RC microleakage. (5) The clinical application of Hybrid Coat dentin protective film, should use RMGIC, RC bonding.

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