Injuries and diseases of the jaws . Tumeurs, 1869). These tumours dependupon some modification of the germ of the tooth before theformation of the cap of dentine, and belong to Broca^s secondclass or odontomes odonto-plastiques. The result is the for-mation of an irregular mass of dental tissues in no wayresembling a tooth in shape. There are, I believe, but five cases of the kind recorded,and these all occurred in the lower jaw. The first case wascommunicated to the Faculty of Medicine of Paris in 1809by M. Oudet. The patient, a man aged twenty-five, had onthe right side of the lower jaw a ma
Injuries and diseases of the jaws . Tumeurs, 1869). These tumours dependupon some modification of the germ of the tooth before theformation of the cap of dentine, and belong to Broca^s secondclass or odontomes odonto-plastiques. The result is the for-mation of an irregular mass of dental tissues in no wayresembling a tooth in shape. There are, I believe, but five cases of the kind recorded,and these all occurred in the lower jaw. The first case wascommunicated to the Faculty of Medicine of Paris in 1809by M. Oudet. The patient, a man aged twenty-five, had onthe right side of the lower jaw a mass occupying the positionof the premolar teeth, which on removal proved to be composedof dentine and enamel. A similar mass on the left side wasnot removed. The second case occurred some years back, inthe practice of Sir William Fergusson, by whom the tumourwas removed with a portion of the jaw, and is described byMr. Tomes (Dental Surgery), from whose work a drawingof a section of the tumour is taken (fig. 85). The second Fig. molar of the lower jaw was represented by an irregularlyflattened mass, composed of enamel, dentine, and bone de-rived from calcification of remnants of the dentine pulp,thrown together without any definite arrangement, by whichthe wisdom tooth was held down. The dental mass, when 188 TUMOURS CONNECTED WITH THE TEETH. removed from its receptacle in the bone, presented no re-semblance to a tooth. Little beads of enamel here and thereprojected from the surface, which was generally rough andirregular. The naked-eye appearance of the section is accu-rately given in the wood-cut, the radiate character in whichshows the arrangement of the component tissues, which, bythe aid of the microscope, are seen at places to alternation is mainly effected by the dentine and bonytissue, and these, indeed, form the great bulk of the appearances presented, prior to the operation,consisted in enlargement of the jaw posterior to the firstpermanent
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