도재용착시 도재-금속 계면에서의 원소이동에 관한 실험적 연구

Abstract

[한글]

저자는 도재와 금속계면에서 금속내에 함유되어 있는 미량원소들의 이동상태를 금속의 처리방법, 소성회수, 도재분말의 종류 그리고 합금의 종류에 따라서 관찰하였다. 금속의 처리방법에 따라 산화처리하지 않은 비처리군, 대기중 산화처리한 대기처리군, 진공중 산화처리한 진공처리군, 불화수소산처리군, 2회 산화처리한 이종열처리군으로 나누어 실험하였고 소성회수는 3회, 5회 그리고 7회 반복소성하였으며, 도재분말에 따른 비교를 위해 Ceramco사와 Vita사의 도재분말을 사용하였고, 합금의 종류에 따른 비교를 위하여 Pd-Ag계 합금인 Parasil**(R), PGV**(R), Pors-on4**(R)를 사용하였다. 분석을 위해 주사전자현미경(SEM)과 전자미세분석기(Electron Probe Micro Analyser)를 이용하여 시험하였던 바 다음과 같은 결론을 얻었다.

1. Sn농도는 대기처리군에서 가장 높고 두껍게 나타났으며, In농도는 진공처리군과 대기처리군에서 높게 나타났다.

2. 진공처리군, 불화수소산 5분 처리군, 이중열처리군의 Sn농도는 유의 차가 없었다 (P>0.05).

3. 불화수소산 처리시간이 증가할수록 미량원소들의 감소뿐 아니라 주성뿐인 Pd와 Ag도 감소하였다.

4. 소성이 반복됨 따라서 Sn과 In농도가 증가하였고 깊이 확산되었으나, 5회 소성군과 7회 소성군 사이에는 유의 차가 없었다(P>0.05).

5. Ceramco도재분말이 Vita도재분말보다 계면에서 Sn농도가 증가하였다.

6. Ceramco도재분말용착시 미량원소의 함량이 높은 합금일수록 계면에서 Sn과 In농도가 증가하였다.

AN EXPERIMENTAL STUDY OF INTERFACIAL ELEMENTAL TRANSITION IN CERAMGIMETAL

RESTORATION

Keun Woo Lee, D.D.S., M.S.D.

Department of Dental Science, Graduate School, Yonsei University

(Directed by Prof. Ho Yong Lee, D.D.S., M.S.D,, Ph.D)

This study was undertaken to observe the elemental transition of interface

depending on different pretreatment methods, the number of firings, the kinds of

porcelain powders and the various alloys in ceramo-metal restoration.

The materials used in this study were Pors-on 4**(R) and Ceramco porcelain powder

to compare the differences depending on the pretreatement methods and the number of

firings. Ceramco porcelain powder and Vita porcelain powder were used to compare

the differences of elemental transition depending on the porcelain powders. The

Parasil**(R),PGV**(R) and Pors-on 4**(R) as Pd-Ag alloy were used to compare the

difference of elemental transition depending on the various alloys.

The pretreatment methods were : no treatment, treatment under vacuum and air,

treatment with 50% hydrofluoric acid and double heat tretament.

The number of filings were 3, 5 and 7 repented firings.

All specimens were observed by SEM and concentration of elements were analyzed

quantitatively with EPMA.

The results of this study were obtained as follows :

1. In the groups of air-treatment concentration of Sn were the highest and widest

A high concentration of In were in the groups of vacuum and air treatment.

2. There were no significant differences in concentration of Sn between the group

of vacuum 5 minutes hydrofluoric acid and douce heat treatment(p>0.05).

3. As the period of time of hydrofluoric acid treatment increased, not only were

the trace elements reduced but the main components such as Pd and Ag were also

reduceed.

4. Concentration of Sn and In increased and diffused with repeated firings but 5

repeated and 7 repeated firings groups had no significant differences (p>0.05).

5. Sn were more concentrated in the group of Ceramco porcelaion powder than Vita

porcelain powder.

6. The higher concentration of trace elements in the alloy, the mere increasing

concentration of Sn and In in the interface.

[영문]

This study was undertaken to observe the elemental transition of interface depending on different pretreatment methods, the number of firings, the kinds of porcelain powders and the various alloys in ceramo-metal restoration.

The materials used in this study were Pors-on 4**(R) and Ceramco porcelain powder to compare the differences depending on the pretreatement methods and the number of firings. Ceramco porcelain powder and Vita porcelain powder were used to compare

the differences of elemental transition depending on the porcelain powders. The Parasil**(R),PGV**(R) and Pors-on 4**(R) as Pd-Ag alloy were used to compare the difference of elemental transition depending on the various alloys.

The pretreatment methods were : no treatment, treatment under vacuum and air, treatment with 50% hydrofluoric acid and double heat tretament.

The number of filings were 3, 5 and 7 repented firings.

All specimens were observed by SEM and concentration of elements were analyzed quantitatively with EPMA.

The results of this study were obtained as follows :

1. In the groups of air-treatment concentration of Sn were the highest and widest A high concentration of In were in the groups of vacuum and air treatment.

2. There were no significant differences in concentration of Sn between the group of vacuum 5 minutes hydrofluoric acid and douce heat treatment(p>0.05).

3. As the period of time of hydrofluoric acid treatment increased, not only were the trace elements reduced but the main components such as Pd and Ag were also reduceed.

4. Concentration of Sn and In increased and diffused with repeated firings but 5 repeated and 7 repeated firings groups had no significant differences (p>0.05).

5. Sn were more concentrated in the group of Ceramco porcelaion powder than Vita porcelain powder.

6. The higher concentration of trace elements in the alloy, the mere increasing concentration of Sn and In in the interface.