Comparative analysis of two techniques for soldered connectors.

The aim of this study was to compare and analyze gas torch and an infrared technique as a heat source. Ney Oro B2, Ney Eclipse and Ney 76 alloys were selected for this purpose. Sixty standardized rods were invested, cast, and sectioned from their respective sprue buttons. The rods were then invested for soldering and sectioned at their midpoints. Ten specimens of each alloy were soldered with the gas torch flame. The Instron universal testing device was used to test the flexural strength of the resultant joints. Fractured specimens were analyzed under electron microscopy.