EXPERIMENTAL STUDY ON SEALING QUALITY OF POLYCARBOXYLATE CEMENT USED AS ROOT CANAL SEALER

카복실레이트 세멘트를 근관(根管) 충전재(充塡材)로 사용(使用) 시(時) 근관(根管) 폐쇄성(閉鏁性)에 관(關)한 실험적(實驗的) 연구(硏究)

The author has studied comparatively the sealing quality of polycarboxylate cement, one of the newest dental cement systems, and zinc oxide eugenol cement by means of penetration of 2% methylene blue solution through the root apex of human teeth in 72 cases as time elapsed. Followings are the results obtained from this study. 1) In all groups, there was no increase in penetration related to increased time of immersion in the dye. 2) In polycarboxylate cement groups, there was a significant difference in depth of dye penetration of each tooth, but in zinc oxide eugenol cement group, there was a slight difference. 3) The depth of dye penetration of zinc oxide eugenol cement group is slightly lower than that of poly carboxylate cement groups. 4) In polycarboxylate cement groups, Carbolit cement group showed comparatively lower grade of dye penetration than Carbo cement group.