[Cervical adaptation of complete cast crowns of various metal alloys, with and without die spacers].
A metallic replica from a dental preparation for crown was used to make 8 class-IV stone dies. The wax patterns for the casting of the crowns were obtained in two conditions: a) from the stone die with no spacer; and b) from the stone die with an acrylic spacer. Thus, 64 metallic crowns were casted, using 4 different alloys: DURACAST (Cu-Al), NICROCAST (Ni-Cr) and DURABOND (Ni-Cr), and gold. The casted crowns were fitted in the metallic replica and measured as to the cervical discrepance of fitting. The results showed that the use of die spacers decreases the clinical discrepancies of fitting of the casted crowns (in a statistically significant level), no matter the metallic alloy employed.
Stephano
C B
CB
Universidade de São Paulo.
Roselino
R F
RF
Roselino
R B
RB
Campos
G M
GM
D000180:Acrylic Resins; D002858:Chromium Alloys; D003442:Crowns; D003735:Dental Casting Technique / Q000295:instrumentation*; D006047:Gold Alloys; D006801:Humans; D008768:Methylmethacrylates; D003765:Models, Dental
D000180:Acrylic Resins; D002858:Chromium Alloys; D006047:Gold Alloys; D008768:Methylmethacrylates; C034578:Duralay
Adaptação cervical de coroas totais fundidas com diversas ligas metálicas, usando troquéis com e sem espaçador.