The Dental cosmos . 5o8 THE DENTAL COSMOS. Fig. Fig. 22.—Cross-section of thebranch tusk a in Fig. 21, showingthe pulp-chamber, dentine, andcement. Nat. size. This same tusk shows also on the opposite side, not visible in thefigure, a second adventitious tusk which is free at the apex for alength of about three inches. It then meets together with the mainbody of the tusk, to become separated again at the base (Fig. 21 6),where it possesses its own pulp-chamber and cementum. An instance of twin formation of the left tusk of an elephantis described by A. Friedlowsky. It is composed of two t
The Dental cosmos . 5o8 THE DENTAL COSMOS. Fig. Fig. 22.—Cross-section of thebranch tusk a in Fig. 21, showingthe pulp-chamber, dentine, andcement. Nat. size. This same tusk shows also on the opposite side, not visible in thefigure, a second adventitious tusk which is free at the apex for alength of about three inches. It then meets together with the mainbody of the tusk, to become separated again at the base (Fig. 21 6),where it possesses its own pulp-chamber and cementum. An instance of twin formation of the left tusk of an elephantis described by A. Friedlowsky. It is composed of two tusks of un-equal size, the larger of which is woundaround the smaller in the form of a longspiral. The anterior segments of bothroots and the greater portion of the bodiesare fused together, but the apices are sepa-rate. (Wedl, Pathology of the Teeth,Amer. ed., p. 171.) The museum of theDental Institute (Berlin) also possesses acase in which twin tusks of equal size areunited only at the apices. I am inclinedto believe that many cases described a
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectdentist, bookyear1890
