. Orthodontia, or malposition of the human teeth; its prevention and remedy . Crib, Band and Spring Devise. (Jackson.). one, for moving ^for-ward an inlockedincisor, is illustratedin Fig. 78. It also is one of , and con- S i S t S simply of a Tubed-Band and Spring. (Jackson.) tubed-band attached to the malposed tooth and an ingeni-ously arranged wire spring to furnish the motive spring is formed by bending a piece of piano-wire PRACTICAL TREATMENT. 137 into the form of a loop with one end much longer than theother, and both of them suitably curved to follow the out-line of
. Orthodontia, or malposition of the human teeth; its prevention and remedy . Crib, Band and Spring Devise. (Jackson.). one, for moving ^for-ward an inlockedincisor, is illustratedin Fig. 78. It also is one of , and con- S i S t S simply of a Tubed-Band and Spring. (Jackson.) tubed-band attached to the malposed tooth and an ingeni-ously arranged wire spring to furnish the motive spring is formed by bending a piece of piano-wire PRACTICAL TREATMENT. 137 into the form of a loop with one end much longer than theother, and both of them suitably curved to follow the out-line of the arch. The longer arm of the spring should atleast be long enough to cover the surfaces of three teeth tofurnish proper support. In adjusting the spring, the longer arm should be nextto the gum while the shorter one is being inserted into thetube, then by turning it downward the whole appliancecomes into proper position with the shorter arm acting as aspring to draw the incisor outward. When the tooth is in place it may be retained by insert-ing a short wire into the tube and allowing it to rest uponthe labial
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