유치의 흡수와 탈락에 관한 조직형태학적 연구

Abstract

[한글]

저자는 5∼15세 한국인 학동에서 발거한 104개의 우식없이 탈락한 유치를 대상으로 흡수나 탈락 과정중의 치수나 치아 경조직의 반응을 알아보고자 하여 탈락 시기별 조직형태학적인 연구로 다음의 결론을 얻었다.

1. 탈락 유치의 61.5%에서 치수조직내 염증세포 침윤이 관찰되었고 탈락전기, 탈락기, 탈락지연기에서 점차 증가되었다.

2. 탈락 유치의 43.3%에서 치수조직내 파치세포가 관찰되었고 탈락전기, 탈락기, 탈락지연기에서 점차 증가되었다.

3. 탈락 유치 치수조직내 다핵구나 파지세포는 백아-법랑 접면부 하방 1.8mm까지 치근이 흡수되기 전에는 관찰되지 않았다.

4. 온전한 치근면의 길이는 탈락전기에서 가장 길며 많은 비율을 차지하였다.

5. 유치치근의 홉수과정은 주로 탈락전기, 탈락기에서 일어났다.

6. 유치의 탈락지연기에서는 흡수 치근면의 재생이 촉진되는 경향이 있었다.

[영문]

The state of pulp and dental hard tissue during the process of resportion and shedding of 104 non-carious primary teeth was assessed by histomorphologic study.

The teeth were extracted from the Korean school children aged 5 to 15 and classified into preshedding, shedding, delayed shedding groups according to the age of the child at the time of extraction.

The results were as follows:

1. The inflammatory cell infiltration in primary pulp tissues occurred in 61.5% of observed teeth and were increased in the order of preshedding, shedding and delayed shedding stages.

2. The odontoclasts were appeared in 43.3% of observed teeth and were increased in the order of preshedding, shedding and delayed shedding stages.

3. The polymorphonuclear leukocytes and odontoclasts couldn't be observed in the exfoliated primary pulp tissues before the process of resorption has involved the root surface about 1.8mm subjacent to the cemento-enamel junction.

4. The intact root surface was the longest and largest in the preshedding stage.

5. The resorption process of primary teeth roots occurred mainly in the stage of preshedding and shedding stages.

6. There was a tendency of repair of resorbing root surfaces in the delayed shedding stage.