Examinando por Materia "Compressive resistance"

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Evaluation of resistance to compressive forces in three types of plaster iv according to post setting time
(Universidad Privada Norbert Wiener, 2023-11-27) Vargas Cueva, Gregori Christian; Morante Maturana, Sara Angelica
The objective of the study was to evaluate the resistance to compressive forces in three types of Type IV gypsum from the brands GC, Zhermack, and Protechno according to post-setting time. The methodology used a quantitative, cross-sectional, and prospective approach with a sample of 45 gypsum die models in total, subdivided into three groups of 15 die models for each brand under study. Inclusion criteria were considered, such as models or molds with a diameter of 20 mm and a height of 40 mm, without bubbles or cracks in their formation. The observational technique was used for recording measurements in the data collection sheet. Results showed, according to post-setting time, the compressive forces at 15 minutes for Protechno (Kimberlit) had an average of 16.612, GC (Fujirock) had an average of 6.752, and Zhermack (Elite rock) had an average of 22.53. At 30 minutes, Protechno (Kimberlit) had an average of 22.528, GC (Fujirock) had an average of 12.044, and Zhermack (Elite rock) had an average of 24.296. At 60 minutes, Protechno (Kimberlit) had an average of 18.352, GC (Fujirock) had an average of 24.33, and Zhermack (Elite rock) had an average of 31.18. Conclusion: Zhermack (Elite rock) exhibited the highest compressive force resistance values with an average of 22.53, median of 22.68 at 15 minutes, average of 24.296, median of 25.14 at 30 minutes, and average of 31.18, median of 28.79 at 60 minutes.