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Effect of antioxidant application on the shear bond strength of laminateveneers bonded to bleached enamel after different time intervals from bleaching

Thesis

Last updated: 06 Feb 2023

Subjects

-

Tags

Fixed Prosthodontics

Authors

Egala, Khaled Samir

Accessioned

2018-08-26 05:26:08

Available

2018-08-26 05:26:08

type

M.Sc. Thesis

Abstract

Aim: to evaluate the effect of antioxidant application as well as the time elapsed between bleaching & bonding on the shear bond strength of laminate veneers bonded to bleached enamel. Methodology: Thirty five freshly extracted intact human teeth were used to prepare flat enamel discs. Thirty five all-ceramic e-max discs were constructed with standardized dimensions following the manufacturer’s recommendations. The enamel discs were divided into 4 groups according to the time elapsed between bleaching and bonding: Group1 (control group n=5 ) ceramic discs were bonded to unbleached enamel discs, Group2 (n=10) ceramic discs were bonded to enamel discs immediately after bleaching (T0), Group3 (n=10) enamel discs were immersed in artificial saliva for 7 days after bleaching (T7) then bonded to the ceramic discs, Group4 (n=10) enamel discs were immersed in artificial saliva for 14 days after bleaching ( T14) then bonded to the ceramic discs. Groups 2, 3 & 4 were subdivided into two subgroups according to the antioxidant application after bleaching and before bonding: Subgroup A (n=5) without antioxidant & Subgroup B (n=5) with antioxidant. Results: The results showed that time interval between bleaching and bonding & antioxidant application had a statistically significant effect on mean shear bond strength. Conclusions: It was concluded that one week delaying of bonding procedure after bleaching or treatment of the bleached enamel surfaces with antioxidant were enough to reverse the reduced bond strength.

Issued

1 Jan 2013

DOI

http://dx.doi.org/10.21473/iknito-space/39519

Details

Type

Thesis

Created At

28 Jan 2023