20 ALES' HRDLIKA 



The measurement is obtained by permitting the lower jaw to rest 

 on its inferior border, and placing the rod of the sliding compass along 

 the posterior border. 



FIG. 5 FIG. 6 



28. Breadth of the ascending ramus; e.g. 



(a) Minimum breadth (m, fig. 6) : The minimum distance between 

 the anterior and posterior borders of the ramus. 



(6) Maximum breadth (M, fig. 6) (optional). 



Landmarks: Anteriorly the most prominent point on the anterior 

 border of the coronoid process; posteriorly the farthest point on the 

 posterior border of the bone. 8 



The measurement is obtained by applying one of the branches of 

 the sliding compass tangently to the posterior border of the lower 

 jaw, and bringing the other branch in contact with the anterior border 

 of the coronoid process. 



29. Height of the symphysis; e.g. 



Landmarks: In the median plane: superiorly the highest point of 

 the alveolar border [bet. the median incisors]; inferiorly the inferior 

 border of the symphysis. 



Measure the actual distance between the two points, not in pro- 

 jection. 



30. Height of the body of the lower jaw; e.g. 



The same technique, but the measurement is taken in a vertical 

 plane, between the first and the second molars. 



8 Really, as well seen from the illustration, the line connecting the most posterior 

 point of the condyle and the point of the angle of the jaw. Tr. 





