| 반복 사용된 치과용 비귀금속에 의한 주조체의 식각표면에 대한 연구 |
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이선형 |
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서울대학교 치과대학 보철학교실 |
| The Etched Surface of the Repeatedly Cast Dental Base Metal Alloy |
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Sun-Hyung Lee |
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Dept. of Prosthodontics, College of Dentistry Seoul National University |
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| Abstract |
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The purpose of this investigation was to evaluate scanning electron micrographs of repeatedly cast base metal alloy. For this study two Ni-Cr-Be alloys were used; Rexillium III and Verabond.
They were repeatedly cast without addition o new alloy melting with an electric resistant furnace (Castron 8, Yoshida dental equipment Mfg.Co.).
They were etched with 10% H₂SO₄ Sol. at 300mA/㎠ for 3 minutes with the use of metal etching unit Oxyetch (OXY dental product Inc.), and ultrasonic cleaning in 18% HC1 Sol. was done.
Etched surfaces were examined under a SEM at x 200 and x 750.
The surfaces are shown in legends. |
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