Examinando por Materia "Dental Adhesives"

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Comparison of the microfiltration degree in direct composite resin restorations using two Adper Single Bond 2 and Single Bond Universal adhesive systems
(Universidad Privada Norbert Wiener, 2019-06-19) Chipana Damian, Angel Abilio; Del Castillo Ayquipa, Armando
The purpose of this study was to determine the degree of microleakage in composite resins associated with the adhesives Adper Single Bond 2 and Single Bond Universal in a Class II Black cavity preparation. This in vitro study was quasi-experimental, prospective, and cross-sectional. Thirty upper premolars extracted for orthodontic reasons were collected, washed with 0.1% thymol solution for disinfection, and stored in physiological saline to prevent dehydration, following inclusion and exclusion criteria. The 30 samples were randomly divided into two groups: Group A (Adper Single Bond 2 adhesive system) and Group B (Single Bond Universal adhesive system with selective etching). The samples underwent Class II Black cavity preparations. They were subjected to 200 thermocycling cycles at temperatures of 5°C and 55°C, then immersed in 2% methylene blue solution for 24 hours. Microleakage identification was performed using photographs taken with a Canon T61 camera mounted on a tripod to ensure a consistent distance across all samples. Measurements were made in millimeters using Adobe Illustrator CS6 and converted to quantitative microleakage data through a simple three-rule calculation. Statistical analysis was conducted using the Student's t-test for independent samples. The results demonstrated that Adper Single Bond 2 exhibited greater microleakage, while Single Bond Universal showed a lower degree of microleakage. It was concluded that there are statistically and clinically significant differences between the two adhesive groups.