. Interpretation of dental and maxillary roentgenograms . ing upon this question. The access of streptococci to the peridental membraneof the apical region in one of the ways mentioned, causesa typical inflammatory reaction on the part of the tissues,which is dependent upon the virulence of the invadingorganisms and the resistance of the patient. If the strep-tococcus is of the hemolytic type, of high virulence, andthe patients resistance is low, the inflammation is acute,and may result in acute abscess formation. If this occurs,after evacuation of the pus, and under proper treatment,the condi
. Interpretation of dental and maxillary roentgenograms . ing upon this question. The access of streptococci to the peridental membraneof the apical region in one of the ways mentioned, causesa typical inflammatory reaction on the part of the tissues,which is dependent upon the virulence of the invadingorganisms and the resistance of the patient. If the strep-tococcus is of the hemolytic type, of high virulence, andthe patients resistance is low, the inflammation is acute,and may result in acute abscess formation. If this occurs,after evacuation of the pus, and under proper treatment,the condition may rapidty subside with practically nodetachment or destruction of the peridental membrane,and no appreciable destruction of bone. In case the invading organism is of the viridans type,of low virulence, the infiammatoiy reaction is apt to bechronic, giving rise to little apparent disturbance, butslowly progressive and proliferative in nature. The firstchange seen in the peridental membrane is a thickening PATHOLOGY AI^D DEjSTTAL EOEjSTTGENOLOGY 39. -Inflammatory periapical tissue of the more acute type, showing prepon-derance of polymorphonuclear cells.
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