The Test of Metal-ceramic Bonding Strength among Three Ceramic Alloies

Objective: To compare the metal-ceramic bonding strength of different ceramic alloies. Methods: 30 wax sheets were divided into 6 groups at random,Each group includes 5 sheets.After being invested conventionally with Bellaves SH,the samples were casted and fused porcelain.The metal-ceramic bonding strength was evaluated. Results: The highest bonding strength was found in Bio Herador N alloy, and then in TILITE alloy and Heraenium S alloy respectively. Bio Herador N alloy and TILITE alloy all had significant differences of the bonding strength before and after treatment (p<0.05). There was no significant differences of the bonding strength of the Heraenium S alloy after treatment (p>0.05). Conclusion: The bonding strength of precious metal-ceramic is higher than that of non- precious metal-ceramic.Pre-oxygen treatment can improve the metal-ceramic bonding strength of Bio Herador N alloy and TILITE alloy,but it has no effect on the metal-ceramic bonding strength of the Heraenium S alloy.