수 종의 지각 과민 완화제가 인산 아연 시멘트 사용시 주조관의 유지력 및 적합도에 미치는 영향

Abstract

[한글]

삭제된 지대치에 있어서 과민 반응은 흔히 일어나는 현상으로 이러한 과민중의 감소를 위하여 지각과민완화제를 사용할 수 있으나 이는 보철물의 유지나 적합에 영향을 준다.

지각과민완화제에 따른 유지력과 적합도의 비교를 위하여 상아질의 표면에 아무 것도 도포하지 않은 대조군, varnish, dentin primer, dentin primer와 bonding agent, potassium oxalate를 도포한 각각의 군으로 설정하여 주조관을 인산 아연 시멘트로 합착시킨 후 유지력과 적합도를 측정하여 다음과 같은 결과를 얻었다.

1. 상아질에 varnish, detrain primer, dentin primer 및 bonding agent, potassium ova-late를 도포한 모든 군의 경우, 도포하지 않은 대조군보다 유지력의 감소를 나타냈다.

2. 각각의 지각과민완화제 도포군들 간의 유지력은 통계학적 유의 차이가 없었다.

3. 대조군과 지각과민완화제 도포군들 간의 교합면부위와 변연부위의 적합도 차이는 통계학적 유의차이가 없었다.

이상의 결과로 미루어 보아 지각과민완화제 사용은 주조관의 유지력 감소를 나타내므로 지각과민증이 예상되는 치아에서 제한적으로 사용이 되어져야 하며 유지력을 저하시키지 않는 지각과민완화제에 관한 연구가 진행되어야 한다고 사료된다.

THE EFFECTS OF VAR10US DESENSITIZING AGENTS ON RETENTI0N AND FITNESS OF CEMENTED

CROWNS WITH ZINC PHOSPHATE CEMENT

Se-Wook Oh

Department of Dental Science, Graduate School, Yonsei University

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

The purpose of this study was to compare the retention and fitness of crown

treated with various desensitizing agents on natural teeth. Varnish, dentin primer,

bonding agent and potassium oxalate treated groups and control group with no

treatment were used. The retention test was executed with the Instron test

machine(Instron Co., U.S.A.) on 24 hours after cementation with zinc phosphate

cement. After retention test, the teeth and crowns were washed and recemented. The

cemented crowns were embedded in dear resin and sectioned with a diamond saw. The

occlusal and marginal fitnesses, were measured indirectly with a stereomicroscopic

photographs. The result of this study were obtained as follows :

1. The retention of control group was higher than any other desensitizing agent

treated group.

2. The differences of retention among varnish, dentin primer, bonding agent and

potato-sium oxalate treated groups were not statistically significant.

3. There were no statistically significant differences in fitness at occlusal

surface and margin among control, varnish, dentin primer, bonding agent and

potassium oxalate treated groups.

According to these results, desensitizing agents used to protect the pulp from

irritation of luting agents may adversely affect the retention of castings.

Therefore, desensitizing agents should be used in limited areas carefully.

[영문]

The purpose of this study was to compare the retention and fitness of crown treated with various desensitizing agents on natural teeth. Varnish, dentin primer, bonding agent and potassium oxalate treated groups and control group with no

treatment were used. The retention test was executed with the Instron test machine(Instron Co., U.S.A.) on 24 hours after cementation with zinc phosphate cement. After retention test, the teeth and crowns were washed and recemented. The cemented crowns were embedded in dear resin and sectioned with a diamond saw. The

occlusal and marginal fitnesses, were measured indirectly with a stereomicroscopic photographs. The result of this study were obtained as follows :

1. The retention of control group was higher than any other desensitizing agent treated group.

2. The differences of retention among varnish, dentin primer, bonding agent and potato-sium oxalate treated groups were not statistically significant.

3. There were no statistically significant differences in fitness at occlusal surface and margin among control, varnish, dentin primer, bonding agent and potassium oxalate treated groups.

According to these results, desensitizing agents used to protect the pulp from irritation of luting agents may adversely affect the retention of castings.

Therefore, desensitizing agents should be used in limited areas carefully.