ABSTRACT
BACKGROUND: The enamel condition and the quality of surface are points that need to be considered for achieving optimal efficiency in the treatment with orthodontic brackets. The aim of this study was to assess the immediate bond strength of metallic brackets cemented to dental. MATERIAL AND METHODS: Forty human premolars were double-sectioned, placed in PVC matrices and randomly divided into 10 groups (n=8). They received artificial saliva contamination before or after the application of adhesive systems, except for the control groups. The metallic brackets were cemented using two orthodontic cements (Transbond™ Plus Color Change, 3M Unitek e Transbond™ XT Light, 3M Unitek). The specimens were subjected to mechanical shear bond strength testing and classified according to the fracture pattern. The results were analyzed using a two-way ANOVA and Tukey's test for multiple comparisons (p<0.05). RESULTS: ANOVA analysis showed statistically significant differences between the groups (p=0.01). The Tukey's multiple comparison test indicated statistically significant difference between G6 and G7 groups (p<0.05). A high prevalence of adhesive failure in the groups receiving the hydrophobic adhesive system. CONCLUSIONS: The saliva contamination prior to the application of a hydrophobic simplified conventional adhesive system was responsible for decreasing the immediate bond strength values of brackets cemented on the dental enamel. Key words:Bonding, orthodontic brackets, shear bond strength, saliva, adhesive systems.
ABSTRACT
Introduction: the latex biomembrane BiomembranaTM has been used in several medical specialties with promising results in promoting wound healing, including surgical, traumatic, isquemic and pressure-induced, as well as ulceration of varied etiology. However, in dentistry its use is not currently well established. Objective: the aim of this study was to describe a treatment for vestibuloplasty using a latex membrane. Case report: due to the inherent characteristics of the latex biomembrane (BiomembranaTM), a vestibuloplasty of the anterior sextant of the mandible was performed using Arruda?s technique of second intention healing modified by the use of a latex biomembrane, in order to assess its applicability and ability to maintain the depth of the vestibule in this type of surgery. Final considerations: latex membrane is an easy to use material which proved useful for vestibuloplasty, since it provided gain of attached gingiva, which remained stable during the 9-month follow-up period.
