The Dental cosmos . o incisors are erupted posterior to the naturalposition in the line of the arch, with, as is often the case, the first i oy 2 THE DENTAL COSMOS. temporary molar, or bicuspid, decayed or absent, an appliance likeFig. 5 will, if the teeth are not too crowded, be sufficient to correctthe irregularity. It is made of spring wire, about No. 17 to 20 stan-dard wire gauge. A loop is first made to pass through the space with one end follow-ing the lingual and the other the labial curve of the arch, and extend-ing to or a little beyond the teeth to be moved. The spring on thelabial s
The Dental cosmos . o incisors are erupted posterior to the naturalposition in the line of the arch, with, as is often the case, the first i oy 2 THE DENTAL COSMOS. temporary molar, or bicuspid, decayed or absent, an appliance likeFig. 5 will, if the teeth are not too crowded, be sufficient to correctthe irregularity. It is made of spring wire, about No. 17 to 20 stan-dard wire gauge. A loop is first made to pass through the space with one end follow-ing the lingual and the other the labial curve of the arch, and extend-ing to or a little beyond the teeth to be moved. The spring on thelabial side is usually made a little longer than the one on the appliance is retained by placing a collar with a lug in suitable po-sition on one or more teeth. If the power of the spring is found to beinsufficient, a wire of larger size can be substituted, or a silk ligaturebe looped around each wire near its end, and by passing between theteeth cause additional pressure by drawing the springs together. Fig. If all the teeth are erupted, and none are to be extracted, the ap-pliance described can be made efficient by bending the loop at a rightangle with the springs, and by suitably shaping it to lie over the archat the junction of two teeth. This is easily accomplished by placingthe loop in a flat-nosed plier or a vise and bending at once to therequired angle, being careful to have the loop so shaped as not to in-terfere with the closing of the teeth, and to retain it with gold collarsand lugs on the teeth as previously described. If the arch is much crowded and some of the teeth too prominentor requiring to be rotated while at the same time expanding the arch,an appliance like Fig. 6 will often be required, and in addition to theappliance described a base wire should be anchored either to thesecond temporary molar, second bicuspid, or first permanent molaron each side of the arch, and provided with one or two loops or cor-rugations, just anterior to the crib attachmen
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Keywords: ., bookauthor, bookcentury1800, bookdecade1890, booksubjectdentistry
