On deformation control of dental crowns prepared by titanium powder process

Authors: Eriksson, M.; Andersson, M.; Holmersson, R.; Berggren, C.; Carlström, E.

Source: Powder Metallurgy, Volume 48, Number 1, March 2005 , pp. 103-109(7)

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Abstract:

This study describes the identification of the main cause of deformation of titanium dental copings prepared by a new powder metallurgy method. The deformation was observed during the process development and needed to be explained to achieve an approved fit. The coping fabrication process was divided into stages to find the main cause of deformation. Each individual stage was investigated to find the cause. Primarily the pressing, milling and sintering steps and the tooth preparation dies (mandrels) were studied. The main cause of the deformation was found to be a deformation of the tooth preparation die during the pressing phase. The other stages were all shown to contribute only slightly or not measurably to the deformation. When using tooth preparation dies of a stronger material (stainless steel) the dies did not deform measurably during cold isostatic pressing and copings of various individual forms with an approved fit could be prepared.

Keywords: DENTAL CROWN; TITANIUM POWDER; DEFORMATION

Document Type: Research Article

DOI: http://dx.doi.org/10.1179/003258905X37611

Publication date: 2005-03-01

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