Research on Microstructural and Chemical Inhomogeneity in Cast Metal Crowns Made of CoCrMoW Alloy

摘要

Non-compliance of the technology for making of prosthetics restorations can induce some phenomena appearance which can cause, during the use, failures of the dental materials properties. This study target was the verification of structural and chemical homogeneity in the characteristic parts of the mold for a dental crown made of CoCrMoW alloy. The samples from the metallic crown, gate runner and pouring gate were investigated. The general microstructural aspect is characteristic to a mold metal state and, without a homogenization, the life time of the prosthetic crown could be reduced. The differences between the three characteristic zones prove that just the prosthetic crown, which is the thinner element, has also the most vicious microstructure in the rough cast state.