14 



DISEASES OF THE DIGESTIVE APPARATUS 



inferior maxillary. It may also be due to some foreign bodies located 

 between the teeth or some strain of the articulation of the inferior maxil- 

 lary. In paralysis of the jaw, the mouth can be closed by putting a stick 



Fig. 5. — Mouth speculum. 



under the jaw and lifting it; this cannot be done in cases of luxation of 

 the articulation or where there is some foreign body between the teeth, 

 such as bones or pieces of wood. The mouth cannot be opened com- 

 pletely in trismus (tetanus) or in partial anchylosis of the articulation; the 



Mjig^ 



Fig. 6.— Gag. 



introduction of the speculum being very painful in some cases of tooth- 

 ache. In injuries of the various masticating muscles, disease of the ar- 

 ticulation of the jaw and infectious hemorrhagic gastro-enteritis. If the 

 speculum iy introduced frequently, the mouth may remain partially open. 



