Comparison of the shear bond strengths of conventional mesh bases and sandblasted orthodontic bracket bases
Journal Title: Brazilian Oral Research - Year 2009, Vol 23, Issue 4
Abstract
This study aimed to compare in vitro the shear bond strength between metallic brackets (Abzil) with conventional mesh bases and metallic brackets with bases industrially sandblasted with aluminum oxide using three adhesive systems, in order to assess the influence of sandblasting on adhesiveness and to compare 3 different bonding systems. Two hundred and forty bovine incisors were used and randomly divided into 6 groups (40 teeth in each group), according to the bracket base and to the bonding system. The brackets were direct-bonded in bovine teeth with 3 adhesive systems: System A - conventional TransbondTM XT (3M - Unitek); System B - TransbondTM Plus Self Etching Primer + TransbondTM XT (3M - Unitek) and System C - Fuji ORTHO LC resin-reinforced glass ionomer cement in capsules (GC Corp.). Shear bond strength tests were performed 24 hours after bonding, in a DL-3000 universal testing machine (EMIC), using a load cell of 200 kgf and a speed of 1 mm/min. The results were submitted to statistical analysis and showed no significant difference between conventional and sandblasted bracket bases. However, comparison between the bonding systems presented significantly different results. System A (14.92 MPa) and system C (13.24 MPa) presented statistically greater shear bond strength when compared to system B (10.66 MPa). There was no statistically significant difference between system A and system C.
Authors and Affiliations
Isabel Cristina Lugato, Lilian Maria Pignatta, Flávia Arantes, Eduardo César Santos
Keywords
Related Articles
- EP ID EP84928
- DOI 10.1590/S1806-83242009000400010
- Views 137
- Downloads 0
Brazilian researcher, annual meeting and the BOR journal: pillars of the SBPqO
Pre-heated dual-cured resin cements: analysis of the degree of conversion and ultimate tensile strength
This study evaluated the degree of conversion (DC) and ultimate tensile strength (UTS) of dual-cured resin cements heated to 50º C prior to and during polymerization. Disc- and hourglass-shaped specimens of Rely X ARC (R...
Crown dimensions and proximal enamel thickness of mandibular second bicuspids
To achieve proper recontouring of anterior and posterior teeth, to obtain optimal morphology during enamel stripping, it is important to be aware of dental anatomy. This study aimed at evaluating crown dimensions and pro...
The ability of the BANA test to detect different levels of P. gingivalis, T. denticola and T. forsythia
The aim of this study was to evaluate the ability of the BANA Test to detect different levels of Porphyromonas gingivalis, Treponema denticola and Tannerella forsythia or their combinations in subgingival samples at the...
Juveniles versus adults: differences in PGE2 levels in the gingival crevicular fluid during orthodontic tooth movement
This study aimed to investigate age-related changes in the biosynthetic capacity of prostaglandin E2 (PGE2) in the gingival crevicular fluid (GCF) during one month of orthodontic treatment. Twenty-five juvenile subjects...