Sažetak sa skupa
The Effects of Investment Expansions on Soldering
G. Sinmazisik
M. Aydin
Sažetak
The investments used in the soldering procedure should provide a good soldering connection without causing any dimensional changes. In this research, the influence of investments with different expansions on the investment soldering procedures was investigated. For this purpose, following the preparation of the experimental
models which represented the abutment teeth, standard bridge restorations were fabricated. After placing bridge restorations onto the abutment teeth, 10 kilograms of standard force was applied for setting the restorations and marginal openings were measured from
six fixed points. The bridge restorations, which were subjected to standard separations, were divided into three groups and embedded in the investment block by using investments with different thermal expansions. The samples were then soldered by preheating + torch technique and marginal openings of each bridge prosthesis at the six
predetermined measuring points were evaluated and recorded. The marginal opening values before and after the soldering and the differences between them were statistically analyzed. In pre-ceramic soldering of base metal alloys, the usage of special soldering investments with low thermal expansion cannot compensate for the expansion of metal during the soldering process and therefore causes
the soldering space to shorten and leads to dimensional changes in the prosthesis.
Ključne riječi
Hrčak ID:
10179
URI
Datum izdavanja:
15.9.2002.
Posjeta: 750 *