Fracture strength of porcelain fused to metal crowns made of cast, milled or laser-sintered cobalt-chromium.

摘要: Abstract Aims. The aim was to compare the fracture strength of porcelain fused metal crowns with copings fabricated in Co-Cr using different manufacturing techniques (casting, milling and laser-sintering) manufactured a high-gold alloy. Methods. A total 50 identical were sub-divided into five groups; cast Co-Cr, milled two groups laser-sintered control group After thermocycling (5000 cycles, 5–55°C) pre-load (30–300 N, 10,000 cycles) loaded until fracture. Load (N) mode recorded. Results. There significant difference (p < 0.05) between one groups. mean values for as follows: 1560 ± 274; 1643 153; 1, 1448 168; 2, 1562 72; group, 1725 220. Conclusion. is no crow...