한국인태아 장관골의 발육 및 화골에 관한 연구

Abstract

This inveitsgation is a study of several quantitative growth changes in the skeletons of the Korean fetuses between the fourth month of fetal age to term. The long bones of the right upper extremity, such as humerus, ulna, radius and the long bones of the right lower extremity, such as femur, tibia, fibula of 391 fetuses (male 195, female 196) were used for the materials. The total length, diameters of the diaphysis and the length of the calcified part of the diaphysis were measured and the monthly average of the measurements, the monthly increment, the monthly increment ratio, the monthly increment coefficient and several indices were calculated. We could present the growth changes of these fetal long bones. . 1. The monthly averages of the total length, diameters of the diaphysis and the length of the calcified part of the diaphysis of the fetal long bones were presented. 2. The growth of the fetal long bones was more rapid before the sixth month of fetal age and thereafter became gradually slow. 3. The growth of the calcified part of the diaphysis was rapid until the sixth or seventh month of fetal age and thereafter became gradually slow but its growth rate was· higher than that of the body stature and the total length of the bone. 4,. The growth rate of the long bones of the upper limb was lower than that of the body statare but the growth rate of the long bones of the lower. limb. was higher than that of the stature. 5. The absolute length of the long hones of' the upper limb of the tenth month fetus was about 27-28% of the adult lor g bones and the absolute length of the long bones of the lower limb of the tenth month fetus was about 2296 of the adult long bones, so the long bones of the upper limb of the fetus developed relatively more rapidly than that of the lower limb. 6. There was no significant sexual difference for the fetal long bone growth.