근관충전용 sealer의 성분이 포스트 세멘트시 레진 세멘트에 미치는 영향

THE EFFECT OF CANAL FILLING SEALER TO RESIN CEMENT IN POST CEMENTATION

근관 충전에 사용된 sealer가 포스트를 세멘트할때 사용되는 레진 세멘트에 어떠한 영향을 주는지 알아보기 위하여 절치 치근 86개를 사용하여 통상의 방법으로 근관확대한 후, 44개의 치근은 I, II, & III군의 Z.O.E. sealer, 42개의 치근은 IV, V, & VI군의 수산화칼슘 계통의 sealer인 Apexit를 사용하여 근관충전하였다. 근관충전 1일(I, IV군), 3일 (II, V군), 7일(III, VI군)이 경과된 후에 기성의 Para-post stainless steel post를 사용하여 a군에서는 Z.P.C.로, b군에서는 All-Bond & composite resin cement로 깊이 7mm가 되게 세멘트하여 군당 시편의 수가 7-8개 되도록 하여 12군으로 나누었다. 완전한 세멘트의 경화를 위하여 5일이 경과된 후 인스트론 만능시험기에 retention jig를 사용하여 거상하고 1mm/min의 cross-head speed로 인장력을 가하여 유지력을 측정하여 다음과 같은 결과를 얻었다. 1. Z.O.E. sealer사용 후 All-Bond & composite resin cement로 세멘트한 군에서 I b군이 $15.5{\pm}7.1kg$, II b군이 $21.6{\pm}5.4kg$, 그리고 III b군이 $20.1{\pm}8.1kg$으로 나타나 I b군이 매우 유지력이 낮았으나 통계학적 유의성은 없었다(p>0.05). 2. 수산화칼슘 계통의 sealer 사용 후 All-Bond & composite resin cement로 세멘트한 군에서 IV b군이 $19.0{\pm}6.7kg$, V b군이 $17.3{\pm}6.5kg$, 그리고 VI b군이 $18.9{\pm}7.9kg$으로 나타났으며 통계학적 유의성은 없었다(P>0.05). 3. 같은 sealer를 사용하고 같은 기간에서 Z.P.C.와 All-Bond & composite resin cement의 포스트 유지력 비교시 All-Bond & composite resin cement 군이 Z.P.C. 군보다 높게 나타났으나 통계학적 유의성은 없었다(P>0.05).

The purpose of this study was to evaluate the effect of the canal filling sealer to resin cement When posts were cemented in the endodontically treated teeth, 86 incisors were used. The coronal portion of the teeth were removed at the cemento-enamel junction, every tooth was done treatment of canal. And the teeth was divided was into 12 groups. G : I a n : 7 Treatment : Z.P.C (1 day after Z.O.E. sealer) G : I b n : 7 Treatment : All-Bond (3 day after sealer) G : II a n : 8 Treatemt : Z.P.C (3 day after sealer) G : II b n : 7 Treatemt : All-Bond (3 day after sealer) G : III a n : 8 Treatemt : Z.P.C (7 day after sealer) G : III b n : 8 Treatemt : All-Bond (7 day after sealer) G : IV a n : 7 Treatemt : Z.P.C (1 day after Apexit sealer) G : IV b n : 7 Treatemt : All-Bond (1 day after sealer) G : V a n : 7 Treatemt : Z.P.C (3 day after sealer) G : V b n : 7 Treatemt : All-Bond (3 day after sealer) G : VI a n : 7 Treatemt : Z.P.C (7 day after sealer) G : VI a n : 7 Treatemt : All-Bond (7 day after sealer) Ready made stainless steel Para-post(PD-K-3) was cemented with Z.P.C. in subgroup a, and cemented with All-Bond & composite resin cement in subgroup b to depth 7mm. After 5 days at cementation of post, teeth with cemented posts were mounted on a retention jig and the failure loads of the specimens were measured by an Instron Universal Testing Machine. The results were as follows. 1. The results of failure loads were $15.5{\pm}7.1kg$ in group I b, $21.6{\pm}5.4kg$ in group II b and $20.1{\pm}18.1kg$ in group III b, and there was no statistically significant , difference between each group(p>0.05). 2. The results of failure loads were $19.0{\pm}6.7kg$ in group IV b, $17.3{\pm}6.5kg$ in group V b.and $18.9{\pm}7.9kg$ in group VI b and there was no significant difference between each other(p>0.05). 3. In same condition, the failure load of subgroup a was largely higher the subgroup b. But there was no significant difference between each other(p>0.05).