Page 740 - My FlipBook

738 ORTHODONTIA AS AN OPERATIVE PROCEDURE.
pcnuissiblo for the })urpose of makino; room. The operation should be
confined to teeth easily kept clean, to
teeth unusually rounded on their ap- Fig. 710.
proximal surfaces, and they should be
reduced only to a normal contour and

Fig. 709.

Truing up (Farrar). Position of corundum wheel (Farrar).

be thoroughly polished. Flat approximal surfaces should never be
produced, as caries is almost sure to be the result. The patient should
be warned to use extra care with the brush and floss silk.
Disks or strips of sandpaper, emery, or garnet may be used for
removing a portion of enamel, after which cuttlefish disks or strips
should be used for polishing.
Class 6. Two or More Teeth in Any or All of the Five Mal-
positions.—One of the oldest and simplest appliances, which requires
very little skill in its construction, is shown in Fig. 711. It can be
Fig. 711.

Labial bow and plate. (From Kingsley.)
used with either upper or lower jaw, and consists of a vulcanite plate
fitted against the lingual surfaces of the teeth. Imbedded in this plate
are the ends of a wire Avhich extends through such gaps, when the jaws
are closed, as are most favorable, and around the buccal and lingual
surfaces of the teeth. A round wire is much better than a flat strip of
plate for this bow, as it can be bent up toward the gum line or down
toward the cutting edges of the incisors according to the necessities of