Shear bond strength of metal-ceramic repair systems.
This study evaluated the shear bond strength of different repair systems to nickel-chromium (NiCr) alloy after storage in water for either 24 hours or six months. One hundred cylindrical specimens (3 mm thick x 9 mm diameter) were fabricated using an NiCr alloy and embedded in a PVC ring, where they received one of five bonding and resin composite repair treatments (n = 20): Clearfil SE Bond/Clearfil AP-X (Group 1), Bistite II DC/Palfique (Group 2), CoJet/Z100 (Group 3), Scotchbond Multi-Purpose Plus/Z100 (Group 4; reference group), and CoJet Sand plus Scotchbond Multi-Purpose Plus/Z100 (Group 5). The specimens were stored in distilled water for 24 hours at 37 degrees C, thermocycled for 1,000 cycles in two baths (at 5 degrees C and 55 degrees C) with a dwell time of 30 seconds for each bath, and stored in distilled water at 37 degrees C for either 24 hours or six months. At 24 hours, Group 3 presented the highest mean values (P < 0.001); at six months, Group 5 demonstrated the highest mean values (P < 0.001). At six months, Group 5 presented a significant increase in shear bond strength (P < 0.001), while Groups 1 and 3 showed a significant reduction (P < 0.001). There were no significant differences between the storage times for Group 2 (P = 0.064) or Group 4 (P = 0.490).
Haneda
Isabella Gagliardi
IG
Department of Dental Materials and Prosthodontics, Araraquara Dental School, Sao Paulo State University (UNESP), Araraquara, SP, Brazil.
Fonseca
Renata Garcia
RG
de Almeida
Juliana Gomes dos Santos Paes
JG
Cruz
Carlos Alberto dos Santos
CA
Adabo
Gelson Luis
GL
D002858:Chromium Alloys; D001840:Dental Bonding; D017269:Dental Prosthesis Repair; D003799:Dental Stress Analysis; D006868:Hydrolysis; D008422:Materials Testing; D016876:Metal Ceramic Alloys; D019279:Resin Cements; D033081:Shear Strength
D002858:Chromium Alloys; D016876:Metal Ceramic Alloys; D019279:Resin Cements