The etiology of osseous deformities of the head, face, jaws and teeth . Fig. 178. Fig. 179. ward. (Fig. 175.) This is the most natural form for theflexion to assume. The arch is simply broken in front, fol-lowing the general direction of the pressure. The mesial sur-faces are parallel; the anterior angle points forward, follow-ing the general law of incisors. The force is uniform. Hadthe anterior column not been forced forward by the posterior one, these teeth would be normal in every respect. Some-times we find them overlapping each other slightly, and 434: ETIOLOGY OF OSSEOUS DEFORMITIES OF
The etiology of osseous deformities of the head, face, jaws and teeth . Fig. 178. Fig. 179. ward. (Fig. 175.) This is the most natural form for theflexion to assume. The arch is simply broken in front, fol-lowing the general direction of the pressure. The mesial sur-faces are parallel; the anterior angle points forward, follow-ing the general law of incisors. The force is uniform. Hadthe anterior column not been forced forward by the posterior one, these teeth would be normal in every respect. Some-times we find them overlapping each other slightly, and 434: ETIOLOGY OF OSSEOUS DEFORMITIES OF occasionally the anomaly is met with that the general axes ofthe teeth do not converge, but diverge. This divergence isfound to be due to a fault} occlusion, the lower incisors act-ing as a wedge, driving the upper incisors apart, or else, froma want of occlusion, they follow their course without guid-ance and support. In the second class, where the cutting edges form anangle which is directed backward (Fig. 176), the pressure frombehind by the posterior column has m
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Keywords: ., bo, bookcentury1800, bookdecade1890, booksubjecthead, bookyear1894
