Principles and practice of operative dentistry . of the gum, oftenpresent serious difficulties to the introduction of gold, whichtest the ingenuity, skill, and patience of the operator, as wellas the fortitude of the patient. One of the most formidable difficulties to be overcome isthe adjustment of the rubber dam to those cases in which thecavity extends beneath the free margin of the gum. Thismay sometimes be accomplished by passing a ligature aroundthe cervix of the tooth and forcibly carrying it towards theapex, until the dam passes beyond the border of the cavity,or the gum may be held aw
Principles and practice of operative dentistry . of the gum, oftenpresent serious difficulties to the introduction of gold, whichtest the ingenuity, skill, and patience of the operator, as wellas the fortitude of the patient. One of the most formidable difficulties to be overcome isthe adjustment of the rubber dam to those cases in which thecavity extends beneath the free margin of the gum. Thismay sometimes be accomplished by passing a ligature aroundthe cervix of the tooth and forcibly carrying it towards theapex, until the dam passes beyond the border of the cavity,or the gum may be held away by the aid of the gum retractor,shown in Fig. 396. It is always best to include in the rubber dam not onlythe tooth to be operated upon, but at least one upon eitherside of it. The How cervix clamp, shown in Fig. 397, oftenserves a good purpose in retaining the rubber dam in position, as do also the Libby clamp (Fig. 398), the Johnson lever clamp (Fig. 399), and the Dunn clamp (Figs. 400 and 401). Gum retractor(reduced). Fig. 397. Fig.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectdentist, bookyear1901
