[Characters of the surface of the cast-bonded keeper: an experimental study].

Purpose: This study is aimed to analyze the characters of the surface of the keeper after cast-bonded in varied temperatures.

Methods: Twelve keepers were divided into three groups: the gold alloy group, the Ni-Cr alloy group and the Ti group with four samples in each group. A sample that contained a Magdisc 500 keeper was fabricated with the cast-bonded technique.

[A comparison between the cast-bonded keeper with different dental alloys in the metallographic structure].

Purpose: The aim of this study is to investigate the changes of the metallographic structure of the cast-bonded keeper when cast in varied temperatures.

Methods: Three groups were included in this study: the gold alloy group, the Ni-Cr alloy group and Ti group, with the Magdisc 500 keeper as the control group. Each sample that contained a Magdisc 500 keeper was fabricated with the cast-bonded technique.