PRINCIPLES OF VETERINARY SURGERY 



629 



left side the palatine arch is considerably thickened, while 

 in the right it has preserved its normal appearance. The 

 contrast would even be greater in an older horse. 



The entire osseous tissue becomes spongy, in fact there 

 is actually re-absorption of the compact tissue until it has 

 become porous. The cancellated tissue is hypertrophied to 



Fig. 98. 



Section ot the Superior Maxilla in the Region of the Third Molar. 1. Dis- 

 eased Bone. 2. Normal Bone. (The Nasal Bones are Removed.) 



the extent of enlarging the rami of inferior maxilla to the 

 thickness of six centimeters. The compact tissue of the 

 rami has completely disappeared and is replaced with a 

 tissue resembling pumice stone. The tissue has consider- 

 ably diminished in density, and encloses a reddish yellow 

 and very vascular marrow. 



