. Elementary and dental radiography . the skin grows harsh and dry, and has asmooth, glossy appearance. In mild cases the inflammation subsides gradually after a few daysand, depending on the severity of the burn, may or may not be followedby desquamation and loss of hair. This Elberhart calls an acute dermatitis of the first degree. In the more severe form of acute dermatitis, termed by Elberhart ofthe second degree, there will be the formation of a blister with the usualserous exudate and marked neuralgic pains. *Ell)crhart Tractical X-Ray Therapy. -/ vt 274 DENTAL RADIOGRAPHY In the very se
. Elementary and dental radiography . the skin grows harsh and dry, and has asmooth, glossy appearance. In mild cases the inflammation subsides gradually after a few daysand, depending on the severity of the burn, may or may not be followedby desquamation and loss of hair. This Elberhart calls an acute dermatitis of the first degree. In the more severe form of acute dermatitis, termed by Elberhart ofthe second degree, there will be the formation of a blister with the usualserous exudate and marked neuralgic pains. *Ell)crhart Tractical X-Ray Therapy. -/ vt 274 DENTAL RADIOGRAPHY In the very severe cases of acute dermatitis, where the deeper layersof the skin and underlying tissues are affected, a slough forms and thedestructive condition shows a marked tendency to spread and become ma-lignant. Severe pain in these latter cases is a wellnigh constant symptom. Cbronic Dermatitis. After exposing himself to the X-rays a greatnumber of times, and having had a number of mildattacks of acute dermatitis—or perhaps without ever. Fig. 308. Chronic X-ray Dermatitis. having had acute dermatitis—the X-ray operator notices certain tissuechanges occurring, usually on the back of the hands, sometimes on theface and chest. The hands, face and chest are most likely to become af-fected, because these parts are the most exposed to the rays. There is apigmentation of the skin very similar to tanning, such as sun and windwill produce. Freckles occur in some cases. The skin becomes harsh, dryand wrinkled—the same changes that occur with age. Hair drops fingernails become brittle and thin and ridged longitudinally. Small,hard, scabby growths (keratoses) occur here and there. These growthsbreak down into ulcers, which often become cancerous. (Fig. 308.) There has been a great deal of discussion as toCancer. whether X-rays can, or cannot, produce cancer, but in the face of such reports as Dr. C. A. Porters* Ido not see how anyone can dispute it. According to the highest author-
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