One-step Self-etch Adhesive Bonding to Pre-etched Primary and Permanent Enamel
Purpose: The purpose of this study was to evaluate the effect of pre-etching enamel with phosphoric acid on the bond strength of a 1-step self-etch adhesive system in primary and permanent teeth.
Methods: The enamel of 30 primary molars and 30 permanent molars was ground with wet 600-grit silicon carbide paper, and specimens were randomly assigned according to bonding approach (with or without acid-etching). Half of the teeth received preliminary acid etching with phosphoric acid for 15 seconds before applying the self-etch adhesive system Adper Easy Bond. Polyethylene tubes with an internal diameter of 0.76 mm were placed on the bonded area and filled up with Filtek Z250 resin composite. The microshear bond testing was performed after 24 hours of storage in water at 37°C. Failure mode was evaluated using a stereomicroscope (400X). The microshear bond strength means were analyzed by 2-way analysis of variance and Tukey's post hoc test (P<.05).
Results: Bond strength to the enamel of primary teeth was significantly lower compared to permanent teeth. Higher microshear bond strength values were obtained when the enamel was pre-etched with phosphoric acid. For all groups, adhesive/mixed failure prevailed.
Conclusion: The preliminary etching of enamel increases the bonding effectiveness for the 1-step self-etch system, regardless of tooth type (primary or permanent).
(J Dent Child 2013;80(2)57-61)
Methods: The enamel of 30 primary molars and 30 permanent molars was ground with wet 600-grit silicon carbide paper, and specimens were randomly assigned according to bonding approach (with or without acid-etching). Half of the teeth received preliminary acid etching with phosphoric acid for 15 seconds before applying the self-etch adhesive system Adper Easy Bond. Polyethylene tubes with an internal diameter of 0.76 mm were placed on the bonded area and filled up with Filtek Z250 resin composite. The microshear bond testing was performed after 24 hours of storage in water at 37°C. Failure mode was evaluated using a stereomicroscope (400X). The microshear bond strength means were analyzed by 2-way analysis of variance and Tukey's post hoc test (P<.05).
Results: Bond strength to the enamel of primary teeth was significantly lower compared to permanent teeth. Higher microshear bond strength values were obtained when the enamel was pre-etched with phosphoric acid. For all groups, adhesive/mixed failure prevailed.
Conclusion: The preliminary etching of enamel increases the bonding effectiveness for the 1-step self-etch system, regardless of tooth type (primary or permanent).
(J Dent Child 2013;80(2)57-61)
Keywords: ACID-ETCHING; ENAMEL; PERMANENT TOOTH; PRIMARY TOOTH; SELF-ETCH ADHESIVE
Document Type: Research Article
Affiliations: 1: Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brazil 2: FUNDECTO-Universidade de São Paulo, São Paulo, Brazil 3: Department of Pediatric Dentistry, School of Dentistry, Universidade de São Paulo, São Paulo, Brazil 4: Department of Pediatric Dentistry, School of Dentistry, Universidade de São Paulo, São Paulo, Brazil. [email protected]
Publication date: 01 May 2013
- Acquired after the merger between the American Society of Dentistry for Children and the American Academy of Pediatric Dentistry in 2002, the Journal of Dentistry for Children (JDC) is an internationally renowned journal whose publishing dates back to 1934. Published three times a year, JDC promotes the practice, education and research specifically related to the specialty of pediatric dentistry. It covers a wide range of topics related to the clinical care of children, from clinical techniques of daily importance to the practitioner, to studies on child behavior and growth and development. JDC also provides information on the physical, psychological and emotional conditions of children as they relate to and affect their dental health.
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