Effect of Simplified Bonding on Shear Bond Strength between Ceramic Brackets and Dental Zirconia

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Abstract

The aim of this study was to evaluate the long term stability of shear bond strength (SBS) when 10-methacryloyloxydecyl dihydrogen phosphate (10-MDP) containing universal adhesive was used in the ceramic bracket bonding on dental zirconia. Twenty human maxillary incisors were collected. The ceramic bracket was bonded on the buccal enamel surface after the acid-etching and orthodontic primer application (Group CON). Sixty zirconia specimens were sintered, sandblasted and divided into three experimental groups; group CP—ceramic primer followed by an orthodontic primer; group U—universal adhesive; group CU—ceramic primer followed by a universal adhesive. For each specimen, the bracket was bonded onto the treated surface with composite resin (Transbond XT, 3M ESPE). The SBS tested before (CON0, CP0, U0, CU0) and after the artificial aging (CON1, CP1, U1, CU1). The data were statistically analyzed with the Kruskal–Wallis test at a significance level of 0.05. The mean SBS of CON0, CP0, U0 and CU0 were within the clinically acceptable range without significant differences. After the aging process, SBS decreased in all groups. Among the aged groups, CP1 showed the highest SBS. Based on the results, when bonding ceramic brackets to a dental zirconia surface, we can conclude that ceramic primer used with an orthodontic primer, rather than using a universal adhesive, is recommended.

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Most cited references 37

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Thermal cycling procedures for laboratory testing of dental restorations.

Craig M. Gale, B W Darvell (1999)

Exposure of restorations in extracted teeth to cyclic thermal fluctuations to simulate one of the many factors in the oral environment has been common in many tracer penetration, marginal gap and bond strength laboratory tests. Temperature changes used have rarely been substantiated with temperature measurements made in vivo and vary considerably between reports. Justification and standardization of regimen are required. An assessment of reports describing temperature changes of teeth in vivo is followed by an analysis of 130 studies of laboratory thermal cycling of teeth by 99 first authors selected from 25 journals. A clinically relevant thermal cycling regimen was derived from the in vivo information, and is suggested as a benchmark standard. Variation of regimens used was large, making comparison of reports difficult. Reports of testing the effects of thermal cycling were often contradictory, but generally leakage increased with thermal stress, although it has never been demonstrated that cyclic testing is relevant to clinical failures. However, should this be done, the standard cyclic regimen defined is: 35 degrees C (28 s), 15 degrees C (2 s), 35 degrees C (28 s), 45 degrees C (2 s). No evidence of the number of cycles likely to be experienced in vivo was found and this requires investigation, but a provisional estimate of approximately 10,000 cycles per year is suggested. Thermal stressing of restoration interfaces is only of value when the initial bond is already known to be reliable. This is not the case for most current restorative materials.

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A Review of Direct Orthodontic Bonding

I. R. Reynolds (2016)

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Thermal cycling for restorative materials: does a standardized protocol exist in laboratory testing? A literature review.

Maurizio D'Amario, Mario Capogreco, Roberto Gatto … (2014)

In vitro tests continue to be an indispensable method for the initial screening of dental materials. Thermal cycling is one of the most widely used procedures to simulate the physiological aging experienced by biomaterials in clinical practice. Consequently it is routinely employed in experimental studies to evaluate materials' performance. A literature review aimed to elucidate test parameters for in vitro aging of adhesive restorations was performed. This study aims to assess whether or not a standardized protocol of thermal cycling has been acknowledged from a review of the literature. An exhaustive literature search, examining the effect of thermal cycling on restorative dental materials, was performed with electronic database and by hand. The search was restricted to studies published from 1998 to August 2013. No language restrictions were applied. The search identified 193 relevant experimental studies. Only twenty-three studies had faithfully applied ISO standard. The majority of studies used their own procedures, showing only a certain consistency within the temperature parameter (5-55°C) and a great variability in the number of cycles and dwell time chosen. A wide variation in thermal cycling parameters applied in experimental studies has been identified. The parameters selected amongst these studies seem to be done on the basis of convenience for the authors in most cases. A comparison of results between studies would appear to be impossible. The available data suggest that further investigations will be required to ultimately develop a standardized thermal cycling protocol.

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Journal

Journal ID (nlm-ta): Materials (Basel)

Journal ID (iso-abbrev): Materials (Basel)

Journal ID (publisher-id): materials

Title: Materials

Publisher: MDPI

ISSN (Electronic): 1996-1944

Publication date (Electronic): 20 May 2019

Publication date Collection: May 2019

Volume: 12

Issue: 10

Electronic Location Identifier: 1640

Affiliations

[1 ]Department of Dental Biomaterials Science, School of Dentistry, Seoul National University, Seoul 03080, Korea; espoir840126@ 123456naver.com (G.-Y.J.); hyun11@ 123456snu.ac.kr (H.-S.L.)

[2 ]Department of Conservative Dentistry, Kyung Hee University Dental Hospital (KHUDH), Seoul 02447, Korea; soram0123@ 123456gmail.com

[3 ]Department of Dental Biomaterials Science, School of Dentistry and Dental Research Institute, Seoul National University, Seoul 03080, Korea; nowick@ 123456snu.ac.kr

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[* ]Correspondence: den533@ 123456snu.ac.kr ; Tel.: +82-2-740-8693

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Soram Oh https://orcid.org/0000-0002-8843-2144

Shin Hye Chung https://orcid.org/0000-0002-9037-1950

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Publisher ID: materials-12-01640

DOI: 10.3390/ma12101640

PMC ID: 6566336

PubMed ID: 31137486

SO-VID: aaf0acc9-3430-4cf5-9f2e-13746ba24976

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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( http://creativecommons.org/licenses/by/4.0/).

Effect of Simplified Bonding on Shear Bond Strength between Ceramic Brackets and Dental Zirconia

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Most cited references 37

Thermal cycling procedures for laboratory testing of dental restorations.

A Review of Direct Orthodontic Bonding

Thermal cycling for restorative materials: does a standardized protocol exist in laboratory testing? A literature review.

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