Abstract
Publisher Summary Many people assume that dental casting investment materials have reached a level of development that makes them completely fit for purpose and that the technology is stable. However, casting titanium and the requirement for increased precision have given new challenges. This chapter discusses the unresolved issues on silica-based phosphate-bonded casting investment material and the problem of casting titanium. It explains the chemistry and structure of binders in established silica-based dental casting investment materials. Casting titanium for dental applications has acted as a major spur to investment development. Titanium presents two major problems; a high melting point and high reactivity. Therefore, to reduce the degree of surface reaction, but retain some thermal expansion, the mould is cooled before casting.
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