Fracture resistance of Nd:YAG laser-welded cast titanium joints with various clinical thicknesses and welding pulse energies.
The purpose of this study was to evaluate the fracture resistance of Nd:YAG laser-welded cast titanium (Ti) joints with various clinical thicknesses and welding pulse energies. A four-point bending test was used to assess the effects of various specimen thicknesses (1-3 mm) and welding pulse energies (11-24 J) on the fracture resistance of Nd:YAG laser-welded Ti dental joints. Fracture resistance was evaluated in terms of the ratio of the number of fractured specimens to the number of tested specimens. As for the fracture frequencies, they were compared using the Cochran-Mantel-Haenszel test. Morphology of the fractured Ti joints was observed using a scanning electron microscope. Results showed that decreasing the specimen thickness and/or increasing the welding pulse energy, i.e., increasing the welded area percentage, resulted in an increase in the fracture resistance of the Ti joint. Where fracture occurred, the fracture site would be at the center of the weld metal.
Lin
Mau-Chin
MC
Department of Dental Laboratory Technology, Central Taiwan University of Science and Technology, Taichung 406, Taiwan.
Lin
Sheng-Chieh
SC
Wang
Yu-Tsai
YT
Hu
Suh-Woan
SW
Lee
Tzu-Hsin
TH
Chen
Li-Kai
LK
Huang
Her-Hsiung
HH
D001672:Biocompatible Materials / Q000737:chemistry*; D012994:Dental Soldering / Q000379:methods*; D007834:Lasers; D008422:Materials Testing / Q000379:methods; D013314:Stress, Mechanical; D013718:Tensile Strength; D014025:Titanium / Q000737:chemistry*
D001672:Biocompatible Materials; D014025:Titanium