General and dental pathology with special reference to etiology and pathologic anatomy; a treatise for students and practitioners . Fig. 272.—Abrasion—mechanical wearing away of the cusps of a lower molar. the tooth and a portion of the root (Figs. 276-279). Mechanicalappliances, such as lingual bars, clasps, etc., are frequently thecause of abrasion. Such instances are seen in Figs. 280 and which resulted from abnormal stress of occlusion areseen in tin- scries from Fig. 282-289. Any tooth may suffer fromabrasion of such severity as to result in the disappearance of allof its cr
General and dental pathology with special reference to etiology and pathologic anatomy; a treatise for students and practitioners . Fig. 272.—Abrasion—mechanical wearing away of the cusps of a lower molar. the tooth and a portion of the root (Figs. 276-279). Mechanicalappliances, such as lingual bars, clasps, etc., are frequently thecause of abrasion. Such instances are seen in Figs. 280 and which resulted from abnormal stress of occlusion areseen in tin- scries from Fig. 282-289. Any tooth may suffer fromabrasion of such severity as to result in the disappearance of allof its crown and even a portion of its root, The abraded surfacepresents a highly polished appearance, and, regardless of the ex-tent of tooth structure lost, the pulp does not become exposed,since a constructive and protective process takes place simul- 358 DENTAL TATIIOLOOY taneously with the loss of tooth structure. Tubular calcificationand secondary dentin are going on constantly in teeth which areundergoing abrasion, and even in those extreme cases in which allof the crown and a portion of the root have been worn away the. Fig. 273.—A series of incisors which have suffered from slight abrasion. At a and bthe dentin has been exposed consequent upon the wasting away of the enamel. labiallyand lingually, and has assumed a brownish yellow color.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectpathology, bookyear19
