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78408

MICRO SHEAR BOND STRENGTH ASSESSMENT OF TWO DIFFERENT ADHESIVE SYSTEMS BONDED TO DIFFERENT DENTIN SUBSTRATES

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Last updated: 23 Dec 2024

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Abstract

This in-vitro study assessed micro shear bond strength of two different adhesive systems bonded on different dentin substrates. Fifteen freshly extracted human molars with coronal dentin caries were collected for this study. The roots were sectioned to expose the pulp chamber. The crown segment was then centrally glued using a cyanoacrylate adhesive to a circular Teflon plate of 10 mm diameter and 2 mm thickness. The occlusal portion of crown segments were ground flat to expose flat dentin surface parallel to the occlusal plan. Caries detector dye was used to identify caries-infected, caries-affected (CAD) and normal dentin (ND). For further confirmation, dye permeability test was applied to detect CAD. Specimens were divided into two main groups (30 each) according to the type of the adhesive system used: A1 (Adper Scotchbond Multipurpose adhesive) control group and A2 (Universal adhesive system). Each group was subdivided into two subgroups (15 specimens each) according to the type of dentin substrate used: D1 (ND) and D2 (CAD). Four resin composite microcylinders were built over each specimen in both substrates. A total of 60 composite microcylinders with prepared dentin surface containing both ND and CAD were used in the study. Each was polymerized using light curing unit. All specimens were subjected to micro-shear bond strength (μSBS) testing using a special universal testing machine (Model LRX-plus; Lloyd instruments Ltd., Ferham, UK). Data was then recorded, tabulated and statistically analyzed. Single bond Universal adhesive system (20.0 ± 96.7 MPa) showed statistically significantly lower mean μSBS than Adper Scotchbond Multipurpose adhesive systems (22.0 ± 10.4 MPa) (P=0.008). Micro-shear bond strength (μSBS) of ND substrate (24.3 ± 8.4 MPa) showed higher statistically significant values than that of CAD (19.4 ± 7.8 MPa) (P=0.001*). Two way ANOVA results showed statistical significant effect for the adhesive systems (Adper Scotchbond Multipurpose and Single bond Universal Adhesive) [p=0.008], dentin substrates (ND and CAD) [p<0.001] and the interaction between the variables had a statistically significant effect on the mean micro-shear bond strength. In conclusion, the type of substrate and bonding strategies affects the bonding performance and durability of restorations in dentistry

DOI

10.21608/edj.2018.78408

Authors

First Name

Ahmed

Last Name

Adel A. Aziz

MiddleName

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Affiliation

Lecturer of Conservative Dentistry, Faculty of Dentistry, Egyptian Russian University, Cairo, Egypt

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First Name

Hebat Allah

Last Name

Mahmoud

MiddleName

Ahmed

Affiliation

Lecturer of Conservative Dentistry, Faculty of Dentistry, Cairo University, Cairo, Egypt

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Orcid

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Volume

64

Article Issue

Issue 2 - April (Fixed Prosthodontics, Dental Materials, Conservative Dentistry & Endodontics)

Related Issue

11448

Issue Date

2018-04-01

Receive Date

2020-03-22

Publish Date

2018-04-01

Page Start

1,681

Page End

1,690

Print ISSN

0070-9484

Online ISSN

2090-2360

Link

https://edj.journals.ekb.eg/article_78408.html

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https://edj.journals.ekb.eg/service?article_code=78408

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32

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Original Article

Type Code

254

Publication Type

Journal

Publication Title

Egyptian Dental Journal

Publication Link

https://edj.journals.ekb.eg/

MainTitle

MICRO SHEAR BOND STRENGTH ASSESSMENT OF TWO DIFFERENT ADHESIVE SYSTEMS BONDED TO DIFFERENT DENTIN SUBSTRATES

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Article

Created At

22 Jan 2023