Bibliographic citations
Zegarra, F., Meza, K. (2020). Comparación in vitro de la adaptación marginal de coronas unitarias de porcelana vitrocerámica elaboradas con tres sistemas de procesado [Tesis, Universidad Peruana de Ciencias Aplicadas (UPC)]. http://hdl.handle.net/10757/653925
Zegarra, F., Meza, K. Comparación in vitro de la adaptación marginal de coronas unitarias de porcelana vitrocerámica elaboradas con tres sistemas de procesado [Tesis]. PE: Universidad Peruana de Ciencias Aplicadas (UPC); 2020. http://hdl.handle.net/10757/653925
@misc{renati/393129,
title = "Comparación in vitro de la adaptación marginal de coronas unitarias de porcelana vitrocerámica elaboradas con tres sistemas de procesado",
author = "Meza Huamán, Katya Valeria",
publisher = "Universidad Peruana de Ciencias Aplicadas (UPC)",
year = "2020"
}
Objective: To compare in vitro the marginal adaptation of ceramic glass porcelain single crowns made with three processing systems. Materials and methods: The present study was experimental in vitro. The sample consisted of 69 glass ceramic porcelain crowns manufactured with the following three systems: CAD-CAM, porcelain injection and powder condensation. For de measurement of the vertical marginal discrepancy, the crowns were photographed using a digital camera with a macroscopic lens of 100 millimeters. The images were imported into image processing software (ImageJ) and 52 points were randomly selected around the crown to measure the vertical marginal discrepancy. For each crown, the 52 measurements were combined into a single average marginal discrepancy. Kruskal-Wallis was used to test differences in the observed marginal discrepancies between the study groups. (p <0.05) Results: This study found statistically significant differences when comparing the three different processing systems (<0.001). The CAD-CAM system had a smaller vertical marginal discrepancy (53 µm) compared to the porcelain injection (85 µm) and the powder condensation techniques (113 µm). Conclusions: Statistically significant differences were found between the three study groups. Also, the CAD-CAM system had a greater marginal adaptation compared to the other two manufacturing techniques. Finally, the three fabrication methods used in this study had a vertical marginal discrepancy within the limit established by the American Dental Association (<120 µm).
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