IN VIVO에서 고양이 상아세관을 통한 상아세관액의 흐름
Flow of dentinal fluid through cat dentinal tubules IN VIVO
손명희, 박수정, 이광원,
소속 상세정보
손명희 ( ) - 전북대학교
박수정 ( ) - 전북대학교
이광원 ( ) - 전북대학교
KMID : 0362319950200010342
Abstract
To determine the factors which affect the flow of dentinal fluid through cat dentinal tubules in vivo, the flow of fluid was measured by observing the movement of the fat droplets of dilute milk in a glass capillary with a microscope connected to
the
monitor. After measuring the exposed area of dentin, hydraulic conductances of dentin were calculated. The mean pressure which stoped the outward flow of dentinal fluid was 9.5mmHg. The hydraulic conductance of dentin under the condition of pulp
exposed
was increased by 21% from that under the condition of dentin exposed. Under the conditions of pulp cut and pulp removed, the hydraulic conductances of dentin were increased by 22% and 31% respectively from that under the condition of dentin
exposed.
These results show that the direction and rate of dentinal fluid flow in cat dentin is affected mainly by the hydrostatic pressure of interstitial fluid of pulp tissue in the state of low compliance. Both of the osmotic effect produced by the
protein
constituents of interstitial fluid across the odontoblast cell layer and the change of interstitial fluid pressure produced by the state of the microcirculation of the pulp also affect the direction and rate of dentinal fluid in some degree.
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