Abstract
Hard resin has been applied for the facings of outer crowns of the cone-telescope denture. Hard resin, however, has limitation as a facing material.
The purpose of this study is to investigate the feasibility of applying metal bonding porcelain for the facings of outer crowns.
The bond strength of 28 kinds of porcelain veneering alloys were measured by bending test in basic experiments. DENTITAN, a BASE METAL ALLOY showed the highest value, and BASE METAL ALLOYS showed higher values than HIGH NOBLE METAL CONTENT ALLOYS. Based on the results of the basic experiments, 6 porcelain veneering alloys were selected to investigate the feasibility of applying metal bonding porcelain as facing material on inner and outer crowns made of each huge of 6 metal. All 6 porcelain veneering alloys showed no significant change in retention strength between inner and outer crowns in 1, 000 times insertion, and there was no damage to the facings. Furthermore, DENTITAN and BYRON which utilizes metallic bonding agent were found to have grater bond strength than others.
DENTITAN and BYRON were found to be suitable materials for applying as porcelain veneering alloy in cone-telescope dentures.
