수종 수산화칼슘 제재를 이용한 근관충전 후 치근상아질에서의 염기도 변화
ALKALINITY CHANGE IN ROOT DENTIN FOLLOWING CALCIUM HYDROXIDE DRESSING
소속 상세정보
1이경하/1Kyuung Ha Lee
1안연실/1이광원/2이명종/1Yun Sil Ahn/1Kwang Won Lee/2Myung Jong Lee
KMID : 0362319970220020670
Abstract
The pH changes in 4 small cavities prepared at the facial inner dentin and lingual
outer dentin of the cervical and apical portion of root filled with calcium hydroxide
pastes were investigated. Forty extracted permanent teeth with single canal were
instrumented with step-back method, and then 4 small cavities were prepared. Two
inner dentin cavities were cut a distance of about 1.0㎜ from the canal wall and two
outer dentin cavities were cut to a depth of about 0.5㎜ from the root surface. Root
canals and prepared cavities were flushed with 17% EDTA, and then irrigated with 5%
NaOCl to remove smear layer. Teeth were randomly divided into four groups. Control
group was not filled and the remaining other groups were filled with mixture of calcium
hydroxide and distilled water, Vitapex paste and Pulpdent
paste respectively. The pH change of the dentin in each cavity was measured at 0, 1, 3,
7, 14, 21, 28, 60, 90 days with pH microelectrode(WPI Co., USA).
The results were as follows : 1. The groups obturated with Pulpdent
paste and Aqueous calcium hydroxide produced the increased pH level at 1 day and
maintained plateau over next 3weeks and decreased after 3weeks.
2. The group obturated with Vitapex paste observed no significant pH
change until 2weeks and slight increased pH at 3weeks and sequential increasing after
3weeks. But, the pH in the group obturated with Vitapex paste remained
significantly below the pH measured in the other two experimental groups(P<0.05).
3. All experimental groups showed pH level similar to control group after 28 days.
4. The pH of outer dentin is slightly higher than that of inner dentin. There is no
significant difference in pH level between apical and cervical dentin throughout the
duration of the experiment, though apical dentin showed slightly higher pH than cervical
dentin at 1 day(P<0.05).
키워드
원문 및 링크아웃 정보
등재저널 정보