Comparative analysis of the fit of 3-unit implant-supported frameworks cast in nickel-chromium and cobalt-chromium alloys and commercially pure titanium after casting, laser welding, and simulated porcelain firings.
This study compared the vertical misfit of 3-unit implant-supported nickel-chromium (Ni-Cr) and cobalt-chromium (Co-Cr) alloy and commercially pure titanium (cpTi) frameworks after casting as 1 piece, after sectioning and laser welding, and after simulated porcelain firings. The results on the tightened side showed no statistically significant differences. On the opposite side, statistically significant differences were found for Co-Cr alloy (118.64 microm [SD: 91.48] to 39.90 microm [SD: 27.13]) and cpTi (118.56 microm [51.35] to 27.87 microm [12.71]) when comparing 1-piece to laser-welded frameworks. With both sides tightened, only Co-Cr alloy showed statistically significant differences after laser welding. Ni-Cr alloy showed the lowest misfit values, though the differences were not statistically significantly different. Simulated porcelain firings revealed no significant differences.
Department of Dental Materials and Prosthodontics, Dental School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil.
Rodrigo
R
Tiossi
Renata Cristina Silveira
RC
Rodrigues
Maria da Glória Chiarello
Mda G
de Mattos
Ricardo Faria
RF
Ribeiro
D002858:Chromium Alloys / Q000737:chemistry*; D000044:Dental Abutments; D003734:Dental Casting Investment / Q000737:chemistry*; D003735:Dental Casting Technique; D015921:Dental Implants; D003764:Dental Materials / Q000737:chemistry*; D003776:Dental Porcelain / Q000737:chemistry; D017267:Dental Prosthesis Design; D019094:Dental Prosthesis, Implant-Supported; D012994:Dental Soldering / Q000379:methods*; D006358:Hot Temperature; D006801:Humans; D007834:Lasers; D008422:Materials Testing; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*
D002858:Chromium Alloys; D003734:Dental Casting Investment; D015921:Dental Implants; D003764:Dental Materials; D003776:Dental Porcelain; D014025:Titanium