1·Placement of an anteroposterior lag screw can also be complicated by screw traffic if there are a large number of screws fixing the primary fracture.
如果对骨折进行大量前后位固定的话，螺钉的位置安置也是问题。
2·Results: 1) No statistically significant difference was found in anteroposterior position of tongue between two groups.
结果：1）舌体的前后位置在两种畸形之间未见显著差异。
3·Case 4 represents a right-axis deviation (Figure 6), in which the interventricular septum is almost parallel to the anteroposterior line.
病例4是表示心轴右偏（图6），室间隔与前后线几乎平行。