. The Dental cosmos. l the way around, beforecutting the tooth down. (13) If a band crown is to be used,care should be taken that the band doesnot impinge on the peridental membraneat any point. (14) Previously placed crowns whichare causing or permitting inflammationof the surrounding soft tissues should beremoved and replaced, if it is impossibleto remedy them otherwise. In somecases cavities may be cut in crowns andfillings placed, or fillings in proximalteeth may be built out to make suffi-ciently good contacts with crowns. (15) In the limited number of casesin which contacts cannot be mai
. The Dental cosmos. l the way around, beforecutting the tooth down. (13) If a band crown is to be used,care should be taken that the band doesnot impinge on the peridental membraneat any point. (14) Previously placed crowns whichare causing or permitting inflammationof the surrounding soft tissues should beremoved and replaced, if it is impossibleto remedy them otherwise. In somecases cavities may be cut in crowns andfillings placed, or fillings in proximalteeth may be built out to make suffi-ciently good contacts with crowns. (15) In the limited number of casesin which contacts cannot be maintainedowing to the continual movement of oneor both teeth, it will occasionally be thebest treatment to extract one tooth inorder to save the others. Such a condi-tion most frequently presents between theupper second and third molars, the thirdmolar gradually moving distally, or being BLACK. BEGINNINGS OF PERICEMENTAL DISEASES. 691 sufficiently loose in its socket to permitmovement under pressure. If the gum Fig. septum cannot be protected from foodlodgments, the best treatment is theextraction of the third molar. DESCRIPTION OF ILLUSTRATIONS. Fig. 1. In testing a contact the liga-ture should be first carried through fromocclusal to gingival, then the two ends ofthe ligature should be held parallel inthe occlusal direction, as shown betweenthe two bicuspids; the distance betweenthe strands will indicate the bucco-lingualwidth of the contact. The two endsshould then be held parallel in the buccaldirection, as shown between the second Fig. 3. bicuspid and first molar; the distancebetween the strands will indicate the oc-cluso-gingival width of the contact. Ineither position, if the parallel strandsare more than from \\ to 2 mm. apart thecontact is too broad. Figs. 2, 3, 4, and 5. Good and badforms of proximal contacts, buccal proper position of the contact pointfor bicuspid and molar teeth is about asshown in Fig. 2, just- a little to the gin-gival of the marginal r
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectdentist, bookyear1912
