Association between microtensile bond strength and leakage in the indirect resin composite/dentin adhesively bonded joint

Sandra Guzmán-Ruiz; Steven R Armstrong; Deborah S Cobb; Marcos A Vargas

doi:10.1016/S0300-5712(00)00065-8

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Association between microtensile bond strength and leakage in the indirect resin composite/dentin adhesively bonded joint

Journal article

Peer reviewed

Association between microtensile bond strength and leakage in the indirect resin composite/dentin adhesively bonded joint

Sandra Guzmán-Ruiz, Steven R Armstrong, Deborah S Cobb and Marcos A Vargas

Journal of dentistry, Vol.29(2), pp.145-153

2001

DOI: 10.1016/S0300-5712(00)00065-8

PMID: 11239590

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Abstract

Purpose: Develop a methodology to correlate microtensile bond strength (μTBS) and leakage within the same site of a specimen and evaluate the predominate debond and leakage pathways . Materials and methods: A Class II (MO) slot cavity was prepared in 37 extracted human molars and restored with indirect resin composite restorations. The restored teeth were thermocycled 300X between 5 and 55°C and then stained with silver. Two specimens per tooth were obtained by diamond saw sectioning for measurement of leakage (μm) and microtensile bond strength (MPa) at the gingival wall and then tested for association with regression analysis. Scanning electron microscopy techniques and energy dispersive spectroscopy (EDS) were used to evaluate the debond and leakage pathways. Results: Association between leakage and bond strength was not significant ( t=1.31, p=0.198). All 74 samples debonded within the joint, predominantly at the hybrid layer-adhesive resin region with only one specimen including a small portion of resin cement in the debond pathway. Secondary and backscatter imaging and EDS analysis showed leakage in all samples that involved the hybrid layer. Conclusion: This study demonstrates a feasible method for evaluating leakage and bond strength at the joint interface within the same specimen.

Dentin

Leakage

Composite

Hybrid layer

Bond strength

SEM

Fracture

Adhesion

Details

Title: Subtitle: Association between microtensile bond strength and leakage in the indirect resin composite/dentin adhesively bonded joint
Creators: Sandra Guzmán-Ruiz - Oral Health Practice Department, College of Dentistry, University of Kentucky, Department of Oral Health Practice, Lexington, KY 40536-0297, USA
Steven R Armstrong - Operative Dentistry, The University of Iowa, USA
Deborah S Cobb - Operative Dentistry, The University of Iowa, USA
Marcos A Vargas - Operative Dentistry, The University of Iowa, USA
Resource Type: Journal article
Publication Details: Journal of dentistry, Vol.29(2), pp.145-153
DOI: 10.1016/S0300-5712(00)00065-8
PMID: 11239590
NLM abbreviation: J Dent
ISSN: 0300-5712
eISSN: 1879-176X
Publisher: Elsevier Ltd
Language: English
Date published: 2001
Academic Unit: Operative Dentistry; Family Dentistry
Record Identifier: 9984065805802771

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