A practical treatise on mechanical dentistry . jaws in mastication,which, acting on the two cusps, exerts such leverage as to some-times turn and break down ordinary crowns where only one pin isused. The roots are ground concave, to fit the crowns, with corundumpoints or a Willard countersink bur, and close joints are madewell under the gum, the pins being set with oxyphosphate canal should be enlarged just enough to admit the pin, whichshould fit snugly throughout its entire length, the better to dis-tribute the leverage exerted by the crown, and thus directly to in-crease the stre
A practical treatise on mechanical dentistry . jaws in mastication,which, acting on the two cusps, exerts such leverage as to some-times turn and break down ordinary crowns where only one pin isused. The roots are ground concave, to fit the crowns, with corundumpoints or a Willard countersink bur, and close joints are madewell under the gum, the pins being set with oxyphosphate canal should be enlarged just enough to admit the pin, whichshould fit snugly throughout its entire length, the better to dis-tribute the leverage exerted by the crown, and thus directly to in-crease the strength of the attachment. ARTIFICIAL CROWNS. 485 The New Richmond Crown.—Dr. George Evans, in his treatiseon Crown and Bridge Work, describes the new Richmondcrown as follows: To illustrate and describe the method ofmounting this crown, a superior left central incisor root will serveas a typical case, and its projecting end is to be shaped as seen inFigs. 309 and 310. This can be rapidly done with a narrow, safe- Fig. 309. Fig. 310. Fig.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectdentist, bookyear1903
