Goret-Nicaise M
Anat Anz. 1984;156(3):217-24.
The mandibular symphysis of the human fetus is radiolucent (Fig. 1). The ventral extremity of the hemimandible consists of secondary cartilage (Figs. 2A, 2B, 5, 7), chondroid tissue (Fig. 4) and woven bone (Figs. 2A, 2B). The examination of the decalcified mandible allows not only the identification of secondary cartilage but also the observance of the soft tissue of the mandibular symphysis and particularly the chondriola symphysea (Figs. 9, 10). Only the preparation of undecalcified sections permits the study of chondroid tissue (Figs. 4, 6, 8) because of the particular pattern of calcification present in this tissue.
人类胎儿的下颌联合是射线可透过的（图1）。半侧下颌骨的腹侧末端由次级软骨（图2A、2B、5、7）、类软骨组织（图4）和编织骨（图2A、2B）组成。对脱钙下颌骨的检查不仅可以识别次级软骨，还可以观察下颌联合的软组织，尤其是联合软骨（图9、10）。由于该组织中存在特殊的钙化模式，只有制备未脱钙切片才能研究类软骨组织（图4、6、8）。
