The Dental cosmos . system, and also some errors in techniquethat would prevent the procuring of goodanchorage. An accurate cast is the first carving of the model at the neckof the tooth is generally an carving of the model at thispoint will always bring about a misfit ofthe appliance. The pat»ttal clasp, a thin piece of the partial clasps can be made of Germansilver. If the model be over-carved at theneck, when the appliance is finished andapplied in the mouth the partial claspwill ride on the natural tooth at thatpoint, near the neck, and leave a spacebet
The Dental cosmos . system, and also some errors in techniquethat would prevent the procuring of goodanchorage. An accurate cast is the first carving of the model at the neckof the tooth is generally an carving of the model at thispoint will always bring about a misfit ofthe appliance. The pat»ttal clasp, a thin piece of the partial clasps can be made of Germansilver. If the model be over-carved at theneck, when the appliance is finished andapplied in the mouth the partial claspwill ride on the natural tooth at thatpoint, near the neck, and leave a spacebetween the partial clasp and the toothnear the grinding surface. This is al-ways objectionable. (See Fig. 3.) JACKSON.—ORTHODONTIA AND ORTHOPEDIA OF THE FACE. 1265 A spring clasp is a piece of No. 21or 20 spring wire of silver-nickel, plati-noid, German silver, or gold, bent twiceat right angles, having the width betweenthe parallel sides equal to the anteropos-terior width of the tooth to be clasped.(Fig. 4.) The
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