Verhandlungen des XInternationalen medicinischen congresses, Berlin, 1890 . allyif the temper is not drawn while soldering, which can be avoided insome cases by keeping the spring portion cool, or by using soft solder,which is usually preferred. The difficulty experienced in regulating the teeth of the lowerarch, often prompts the dentist to delay the operation from time totime, and more often to avoid even its consideration. I have been using for a considerable length of time metal springappliances, that are also applicable for the correction of irregularitiesof the teeth in the lo
Verhandlungen des XInternationalen medicinischen congresses, Berlin, 1890 . allyif the temper is not drawn while soldering, which can be avoided insome cases by keeping the spring portion cool, or by using soft solder,which is usually preferred. The difficulty experienced in regulating the teeth of the lowerarch, often prompts the dentist to delay the operation from time totime, and more often to avoid even its consideration. I have been using for a considerable length of time metal springappliances, that are also applicable for the correction of irregularitiesof the teeth in the lower arch, which I shall first briefly describe. Fig. 1. In the model here presented it will be seen that theright inferior cuspid was much too prominent and articulated outsideof the upper teeth, there being insufficient space for it in the arch. The first molar was finally extracted as it was defective, and apiano wire was formed to the lingual side of the teeth in the arch,following the line of the gum to the distal tooth on either side, aroundwhich the ends were formed to Fig. 1. The gum was very prominent just back of the molars and accordinglythe plaster model on which the appliance was formed, was carvedslightly, to allow the spring to more perfectly clasp about the necksof the teeth. A second spring wire was then formed to join the one described,and pass just anterior to the second molar through the space made by Jackson, Methods of applying springs without the use of a plate. 121 the extraction of the first molar, and extend forward terminating ina curve on the anterior surface of the prominent cuspid. The two spring wires were then joined with soft solder, first havingwound the part forming the joint with small copper wire, or the wholeappliance can be immersed in moulten tin, plating it at the same timeif desired. The pressure of the spring was regulated by bending toward orfrom the main wire and curving the end. The tension was such as to draw the cuspid, and
Size: 1779px × 1404px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookidverha, booksubjectmedicine
