Produção Nacional
Revisado por pares
Influence of Temperature on the Spreading Velocity of Simplified-Step Adhesive Systems
2006; Wiley; Volume: 18; Issue: 1 Linguagem: Inglês
10.2310/6130.2006.00009
ISSN1708-8240
AutoresFlávia Bittencourt Pazinatto, Luiz Marquezini, Maria Teresa Atta,
Tópico(s)Dental Research and COVID-19
ResumoABSTRACT Background: Flowability and viscosity vary for different adhesive systems owing to differences in their composition. These characteristics can be modified by environmental temperature. Purpose: The purpose of this study was to determine the influence of temperature on the spreading (flow capacity) of simplified-step adhesive systems. Materials and Methods: Spreading velocities of adhesive systems (Adper Single Bond and Single Bond Plus [3M ESPE, St. Paul, MN, USA]; Prime & Bond 2.1 and Prime & Bond NT [Dentsply Indústria e Comércio Ltda, Petrópolis, RJ, Brazil]; Adper Prompt [3M ESPE]; and One Up Bond F [Tokuyama Corp, Tokyo, Japan]) were analyzed at intervals of 10, 15, 20, and 30 seconds at both 25°C and 37°C by placing 10 μL drops on a glass slide surface with an inclination of 45°. The spreading of each adhesive system was measured in millimeters per second. Results: Data were analyzed by two-way analysis of variance and Student-Newman-Keuls tests. Regression analysis was used to determine a correlation between spreading velocity and time. Statistical significance was considered at a confidence level of 95%. Temperature influenced the spreading velocity, increasing it for Single Bond and Prime & Bond 2.1 and decreasing it for Adper Prompt (p < .05). No differences on spreading were observed for the other adhesives studied (p >.05). Regression analysis of each adhesive system demonstrated an inverse correlation between mean spreading velocity and time (R2 = .999) on both temperatures. Conclusions: Temperature increases yielded an increase of spreading for Single Bond and Prime & Bond 2.1. The influence of temperature on the spreading velocity was material dependent. CLINICAL SIGNIFICANCE Environmental temperature can influence the rate of spreading of the adhesive system in clinically relevant times and may influence adhesive thickness on cavity walls.
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