Comparison of tensile strength of solder joints by infrared and conventional torch technique.
Fabrication of a fixed partial denture may require a soldering step. This study compared soldering by a conventional torch procedure with an infrared soldering technique. Comparisons were made for tensile strength, porosity, and time efficiency between the two methods. No significant difference was found in ultimate tensile strength between the two types of solder joints and the nonsoldered control samples. Random samples photographed with a scanning electron microscope revealed no difference in joint porosity between the two techniques. Torch soldering took consistently less time that infrared soldering.
Graduate Prosthodontics Program, University of California, School of Dentistry, San Francisco.
G
G
Cattaneo
G
G
Wagnild
G
G
Marshall
L
L
Watanabe
D003722:Dental Alloys / Q000737:chemistry*; D012994:Dental Soldering / Q000379:methods*; D003799:Dental Stress Analysis; D006358:Hot Temperature; D007259:Infrared Rays; D008855:Microscopy, Electron, Scanning; D016062:Porosity; D013499:Surface Properties; D013718:Tensile Strength; D013997:Time Factors
D003722:Dental Alloys