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- Title
Evaluation of the Effect of Recasting on the Elastic Modulus of Ni-Cr Dental Alloy Structures: An In Vitro Study.
- Authors
Ramírez, Raúl; Lozano, Felipe Enrique; Lévano, Víctor; Cornejo, Alberto; Agüero, Patricia; Mayta-Tovalino, Frank
- Abstract
Aim: To evaluate the effect of recasting on the elastic modulus of Ni-Cr dental alloy structures. Materials and Methods: This study was of an in vitro experimental type. The sample consisted of n=30 specimens that were divided into three groups. The study was conducted in vitro, both prospectively and longitudinally, on rectangular specimens of Ni-Cr dental alloy structures made with specific measurements by means of a casting process using the lost wax technique. Subsequently, a laboratory test to obtain the value of the elastic modulus was conducted by means of a bending test with a universal testing. The groups were as follows: Group 1: 100% reused Ni-Cr dental alloy structures; Group 2: 50% reused Ni-Cr dental alloy structures; and Group 3: 25% reused Ni-Cr dental alloy structures. The data were expressed in mega pascals (MPa). All statistical analysis was performed by using Stata software with a confidence level of 95% (Kruskal-Wallis test was used (p < 0.05)). Results: When evaluating the elastic modulus of group 1 (100% reused Ni-Cr dental alloy structures), it was found that the highest value was in the first recast. In both group 2 (50% reused Ni-Cr dental alloy structures) and group 3 (25% reused Ni-Cr dental alloy structures), the highest values occurred in the third recast. Conclusions: The number of recasts did not influence the modulus of elasticity of the Ni-Cr dental alloy structures tested in this study.
- Subjects
DENTAL metallurgy; ELASTIC modulus; PRECISION casting; MODULUS of elasticity; ALLOY testing
- Publication
Journal of International Oral Health, 2022, Vol 14, Issue 2, p203
- ISSN
0976-7428
- Publication type
Article
- DOI
10.4103/jioh.jioh_289_21