HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Littlewood, S. J. Articles by Wood, D. J. Search for Related Content PubMed PubMed Citation Articles by Littlewood, S. J. Articles by Wood, D. J.

Investigation of a Hydrophilic Primer for Orthodontic Bonding: an in vitro study

Department of Orthodontics, University Dental Hospital of Manchester, Higher Cambridge Street, Manchester, U.K.
Department of Orthodontics, St Luke's Hospital, Little Horton Lane, Bradford, U.K.
Sub-Unit for Medical Statistics, Centre for Health Services Research, 71–75 Clarendon Rd, Leeds, U.K.
Division of Restorative Dentistry, Leeds Dental Institute, Clarendon Way, Leeds, UK

Abstract

A common reason for bond failure is moisture contamination. This study investigates the in vitro bond strength of brackets bonded using a new hydrophilic primer, designed to be insensitive to moisture, and compares it with a conventional primer. Using a standardized technique, the in vitro bond strength of brackets bonded with the hydrophilic primer was compared to identical brackets bonded with a conventional primer. Although designed to be moisture insensitive, the directions for use stipulate drying the teeth before bonding. Therefore, for the purposes of comparison with a conventional primer the experiment was conducted under dry conditions. The results were analysed using the Weibull distribution modelling.

The median bond strength with the hydrophilic primer (6•43 MPa, 95 per cent C.I. 7•69–9•50) was significantly lower (P = 0•0001) than the conventional primer (8•71 MPa, 95 per cent C.I. 5•89–7•59). The Weibull distribution modelling showed that brackets bonded with the hydrophilic primer were 3•96 times more at risk of failure (95 per cent C.I.: 2•39–6•56; P <0•0001). The bond strength at which 5 per cent of the brackets failed was also lower for the hydrophilic primer.

The bond strengths obtained with the hydrophilic primer were significantly lower than with the conventional primer. Although the median bond strength values were promising, the laboratory results for this particular hydrophilic primer were disappointing when using the Weibull analysis, where the whole distribution of bond strength is taken into account.

Key words: Hydrophilic Primer, Moisture Insensitive Primer, Orthodontic Bonding, Weibull Analysis.

This article has been cited by other articles:

				A. Faltermeier, M. Behr, M. Rosentritt, C. Reicheneder, and D. Mussig An in vitro comparative assessment of different enamel contaminants during bracket bonding Eur J Orthod, December 1, 2007; 29(6): 559 - 563. [Abstract] [Full Text] [PDF]

				A. Mavropoulos, A. Karamouzos, G. Kolokithas, and A. E. Athanasiou In vivo evaluation of two new moisture-resistant orthodontic adhesive systems: a comparative clinical trial J. Orthod., June 1, 2003; 30(2): 139 - 147. [Abstract] [Full Text] [PDF]

				S. J. Littlewood, L. Mitchell, and D. C. Greenwood A Randomized Controlled Trial to Investigate Brackets Bonded with a Hydrophilic Primer J. Orthod., December 1, 2001; 28(4): 301 - 305. [Abstract] [Full Text] [PDF]