EFFECTS OF SOLDERING AND LASER WELDING ON BOND STRENGTH OF CERAMIC TO METAL
Küçük Resim Yok
Tarih
2011
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Mosby-Elsevier
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Statement of problem. Welding or soldering of metal frameworks negatively affects the overall bond strength between the veneering ceramic and metal. Purpose. The purpose of this study was to evaluate the effect of soldering and laser-welding procedures on the bond strength between ceramic and metal. Material and methods. Thirty Ni-based metal specimens (Wiron 99) (8 x 4 x 4 mm) were fabricated and divided into 3 groups; soldered (S), laser welded (L), and control (untreated cast alloy) (n=10). In S and L specimens, a notch (1 x 1.5 mm) was prepared longitudinally on the surface of each specimen and filled with compatible alloy (Wiron soldering rods and Wiroweld NC, respectively). Vickers hardness measurements were made after polishing the surfaces with a metallographic polishing kit. A veneering ceramic (VITA VMK 95) was vibrated, condensed in a mold, and fired on the metal frameworks. The specimens were sectioned in 2 axes to obtain nontrimmed bar specimens with a bonding area of approximately 1 mm(2). Forty bars per block were obtained. Each bar was subjected to microtensile bond strength (mu TBS) testing with a crosshead speed of 1 mm/min. The mu TBS data (MPa) were recorded, and SEM was used for failure analysis of the tested bars. The measurements were statistically analyzed using a 1-way ANOVA and Tamhane tests (alpha=.05). Results. The mean differences in mu TBS of veneering ceramic to soldered (10.4 +/- 2.4 MPa) and laser-welded (11.7 +/- 1.3 MPa) metal surfaces were not significantly different and were significantly lower than that of the cast alloy (25.4 +/- 3.6 MPa) (P<.05). The mean Vickers hardness of cast alloy was significantly higher (236 +/- 17 HV) than soldered (114 +/- 9 HV) and laser-welded groups (129 +/- 11 HV) (P<.05). Conclusions. Soldering and laser welding significantly decreased the mu TBS of a veneering ceramic to a base metal alloy. (J Prosthet Dent 2010;105: 28-34)
Açıklama
Pan European Federation Conference of the International-Association-for-Dental-Research -- SEP, 2008 -- London, ENGLAND
Anahtar Kelimeler
Kaynak
Journal of Prosthetic Dentistry
WoS Q Değeri
Q2
Scopus Q Değeri
Cilt
105
Sayı
1
