. Operative and dental anatomy technics; a class-room and laboratory manual for freshmen dental students . Fig, 224.—Same model as shown in Fig. 223 carrying teeth with tj^pical cavity preparations. This model is of aluminum with removable teeth. Thereis a complete set of perfect natural tooth forms. Blacksaverage measurements, enlarged. There is also a set, whichis interchangeable, with typical cavity forms, very useful fordemonstrative and display purposes. Enlarged models are,in the writers opinion, more useful for demonstrating pur- l88 SUGGESTIONS TO THE TEACHER poses than the lantern, th
. Operative and dental anatomy technics; a class-room and laboratory manual for freshmen dental students . Fig, 224.—Same model as shown in Fig. 223 carrying teeth with tj^pical cavity preparations. This model is of aluminum with removable teeth. Thereis a complete set of perfect natural tooth forms. Blacksaverage measurements, enlarged. There is also a set, whichis interchangeable, with typical cavity forms, very useful fordemonstrative and display purposes. Enlarged models are,in the writers opinion, more useful for demonstrating pur- l88 SUGGESTIONS TO THE TEACHER poses than the lantern, though where these are not available,the lantern is a valuable adjunct. At the University of Southern California, Dental Depart-ment, Los Angeles, there is in use an enlarged set of plastermodels designed by Professor H. Gale Atwater, showing var-ious stages of decay, on which actual operations are performedbefore the class, with a set of enlarged instruments (, 226, and 227), At the University of Cahfornia Dental. ^^t^ ■ h gjfi-.!- m 1 Fig. 225.—Dr. H. Gale Atwaters model and instruments. Both are made toBlacks measurements, 25 diameters. A model of the lower teeth, not shown, is alsoused. In the illustration, ideal cavity forms have been completed. Enlargedmatrices may be seen to the right of the picture. Department, San Francisco, there is in use an enlarged setshowing the progressive stages of gold-building operations incolors, which should prove very valuable. The collection of an adequate number of extracted teethis really not such a difficult problem, if pursued in the rightmanner. The College catalogue should contain a clause in aconspicuous place, appealing to its alumni for extracted prospective student should also be requested, by way of SUGGESTIONS TO THE TEACHER 189
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