46 COMPAKATIVE DENTAL ANATOMY 



Elastic Hinge. In one type we find the tooth is 

 attached to the pedestal of bone by means of 

 fibrons membrane which is located on the lingual 

 side of the tooth and bony support. The base of 



Fig. 9. — Hinged tooth of Pike (species unknown). (After Tomes.) 



the tooth is attached to the bone by means of 

 elastic fibres. When the tooth is bent toward the 

 oral cavity the elastic fibres pull it back to an 

 upright position. If the fibres are cut the tooth 

 will remain wherever placed, which shows there 



