WROUGHT WIRE CLASP의 물리적 성질에 관한 실험적 연구
AN EXPERIMENTAL STUDY ON PHYSICAL PROPERTIES OF WROUGHT WIRE CLASP
The purpose of this study was to evaluate the influence of attachment technique on mechanical properties and microstructures of wrought wires. The wires tested in this study were precious metal wires: PGP (Platinum-Gold -Palladium), Elastic #12, Denture Clasp, Standard, Jelenko No. 2, Degulor-Klammerdraht, DM (Dong Myung) and base metal wire : Ticonium. Each wire was divided into three groups, and each group was heat treated as embedding, cast to, and soldering state. Heat treated sample was evaluated by tensile test, bending test, microhardness test, element analysis and microstructure test. The obtained results were as follows: 1. In tensile test, cast to and soldering procedures have an effect on wrought wire clasp as hardening heat treatment. 2. Maximum bending strength was significantly increased in Elastic #12, Denture Clasp, Standard, and DM in cast to procedure. 3. Ticonium showed the highest Victors hardness number, followed by PGP, and there was no significant difference in other wrought wires. In cast to and soldering procedure, Victors hardness number was significantly increased in precious wrought wires. 4. The precious wrought wire showed typical fibrous structure and this was disappeared in cast to and soldering procedure. But physical properties were not influenced by this phenomenon.
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