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Determinación del módulo de Young en aleaciones de cobalto-cromo nuevas y reutilizadas, coladas en centrifuga convencional y por inducción

2008; Volume: 27; Issue: 59 Linguagem: Inglês

2027-3444

Alejandra Flórez Alvarado, Angélica González Marín, Hyung Kuk Kim, Juan Carlos Romero Mesa, Daniel Henao Pérez,

Health and Medical Education

PURPOSE: Analyze the possible alterations of mechanical properties of cobalt-chromium alloys measured through the Young�s module, when comaring new and/or recycled materials and casting techniques, in order to establish if those alloys can be resued to fabricate removable partial dentures. METHODS: For this experimental in vitro study, 60 specimens casted in Co- Cr alloys were assigned to two groups according to the type of alloy, Bego�s Wironit L.A® and Dentaurum�s Remanium® 800. The two groups were divided into 6 subgroups of 5 specimens each regarding state of the material and type of centrifuge used: new material with induction centrifuge, 50%-new-and-50%-recycled material with induction centrifuge, recycled material with induction centrifuge, new material with conventional centrifuge, 50%-new-and-50%-recycled material with conventional centrifuge, and recycled material with conventional centrifuge. FINDINGS: The state of the material is the factor that was more associated to the variation of the Young�s module, being the 50%-newand- 50%-recylced material that showed the highest variation. When comparing new and used materials, values were similar. Young�s module was less affected by the type of centrifuge used. There was not a significant association between the kind of Co-Cr alloy, Wironit® y Remanium®, and the variation in the Young�s module, in spite of presenting variations in composition (a=005).