Beta
72621

Influence of hydrophobic resin coating on micro-tensile bond strength of different adhesives: an in – vitro study

Article

Last updated: 01 Jan 2025

Subjects

-

Tags

-

Abstract

Recently, the etch-and-rinse and self-etching approaches are the two strategies of resin-based adhesive systems to accomplish the bonding to enamel and dentin. The increased amount of solvents and hydrophilic monomers in the adhesive formulations lead to greater amount of residual solvents entrapped in the adhesive layer. Consequently, the resulting polymers will be more susceptible to degradation over time. One of the methods for more durable bond includes the application of an additional layer of a hydrophobic resin coating over the polymerized simplified adhesive. The aim of this in –vitro study was to evaluate the influence of hydrophobic resin coating on micro-tensile bond strength of different adhesives Eighty freshly sound human molars were divided into three main groups according to method of bonding (A), where (A1) represents teeth bonded using Single Bond Universal Adhesive in total each approach, (A2) represents teeth bonded using Single Bond Universal Adhesive in self-etch approach while (A3) represents teeth bonded using Self Etch Future Single Bond DC Bonding System. Each (A) group will be then subdivided into two additional subgroups according to the addition of hydrophobic resin coating into (B1) which stands for teeth with additional hydrophobic resin coating and (B2) which stands for teeth without additional of hydrophobic resin coating. Each (AB) group will be finally subdivided into two smaller subgroups according to the effect of thermocycling, where (T1) denotes the teeth which were thermocycled, and (T2) denotes the teeth which were not thermocycled. The occlusal dentin surface of each molar was prepared on two levels: Superficial level (below the dentino enamel junction by 0.5 mm) and deep level (below the dentino enamel junction by 1.5 mm). For all specimens, after bonding procedures either total etch or self etch, a hydrophobic resin coating was added for the assigned groups. Resin composite was applied; thermo-cycling was done for the assigned groups. Teeth were sectioned into a series of 1 mm thick slabs and microtensile bond strength testing was done. Two representative specimens of each group were selected for Ultramorphological Examination. Mode of application, addition of adhesive layer and thermocycling had a significant effect on bond strength. Within the limits of this study, we concluded that regarding bonding efficacy to enamel and dentine, conventional 3-step etch-and-rinse adhesives are still not surpassed by the newer simplified self etch adhesive systems. Addition of the hydrophobic bonding resin coating improved bonding to dentine especially when used with all-in-one self-etch adhesive systems.  

DOI

10.21608/edj.2019.72621

Authors

First Name

Marwa

Last Name

Temirek

MiddleName

Mohamed Abbas

Affiliation

Lecturer of Conservative Dentistry, Faculty of Dentistry, Fayuom University.

Email

-

City

-

Orcid

-

Volume

65

Article Issue

Issue 3 - July (Fixed Prosthodontics, Dental Materials, Conservative Dentistry & Endodontics)

Related Issue

10701

Issue Date

2019-07-01

Receive Date

2020-02-21

Publish Date

2019-07-01

Page Start

2,577

Page End

2,586

Print ISSN

0070-9484

Online ISSN

2090-2360

Link

https://edj.journals.ekb.eg/article_72621.html

Detail API

https://edj.journals.ekb.eg/service?article_code=72621

Order

14

Type

Original Article

Type Code

254

Publication Type

Journal

Publication Title

Egyptian Dental Journal

Publication Link

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

MainTitle

Influence of hydrophobic resin coating on micro-tensile bond strength of different adhesives: an in – vitro study

Details

Type

Article

Created At

22 Jan 2023