| 摘要 |
<p>An orthodontic apparatus 200, for the orthodontic treatment of one or more anterior teeth, comprising a pair of latterly opposed body portions 12 provided with anchoring devices 16 for anchoring the appliance 200 to the posterior teeth, a pair of open ended sleeves 18 housing biasing members 25, preferably nickel-titanium springs, and a removable lingual bow 140 having a medial body portion 124 and a pair of distal ends 79a. Where, in use, the distal ends 79a, preferably in the form of rods, are slidably inserted into the sleeves 18 such that the springs 25 located therein bias the lingual bow 140 in an anterior direction. The body portions 12 and lingual body 124 are preferable formed from a molded resin. The appliance 200 may further include a, preferably transparent, labial bow 220 comprising a pair of elastic distal parts 89, or a pair of side members (25, fig 4) that are biased in a posterior direction, to bias a medial part 124 in a posterior direction. The appliance 200 may, further still, include an adjustable connector 85 disposed to apply an adjustable retraction force to draw the body portions 12 together.</p> |
