| 摘要 |
An elongate resilient dental band that may be disposed to form a tensioned loop that encircles a patient's tooth, and when so situated have an apertured pliable sheet guided downwardly thereover to contact the gingival, and the sheet acting as a dam to isolate the banded tooth to maintain the latter in a dry condition. An elongate appliance is provided that is operatively associated with the band, with the appliance serving a twofold purpose, first to apply a desired degree of tension to the band to maintain it in an encircling position about a tooth, and secondly, to act as a guide to permit an apertured dam to be slid longitudinally therealong, and then downwardly over the banded tooth to engage the gingival of the patient. The band is provided with dam-retaining means that permit downward movement of the dam thereover, but which engage the portion of the dam adjacent the band to prevent the dam being inadvertently dislodged from the tooth by an upward force being exerted thereon by the patient's tongue.
|
