| 摘要 |
An orthodontic coil spring assembly is provided for installment on orthodontic brackets bonded on a patient's teeth for applying interarch tension. The coil spring assembly includes a coil spring and two attachment plates. Each of the attachment plates includes a first end connected with one of the ends of the coil spring, and an opposite second end connectable with an orthodontic bracket. The distance between the first and second ends of each plate is about 6 mm. Each plate also includes a narrowed neck portion between the first and second ends to facilitate deformation of the plate during installation on the brackets. An expandable sheath may be provided for covering the coil spring to inhibit pinching of the patient's cheeks by the coil spring.
|
