Matrix band retainer

摘要

A denial matrix band retainer is provided with a retractor, main body portion and a bias mechanism. The retractor includes a proximal end and a distal end, with a band engagement portion at the proximal end. The main body portion having a proximal end and a distal end, with a head portion located at the proximal end. The bias mechanism coupling the retractor to the main body portion, the bias mechanism having a static position and a fully active position, wherein in the static position the head portion is spaced apart from the band engagement portion a first distance, and in the fully active position the head portion is spaced apart from the band engagement portion a second distance which is greater than the first distance, the bias mechanism including an actuator for urging the bias mechanism towards the fully active position.

主权项

1. A dental matrix band retainer comprising:
a retractor having a proximal end and a distal end, with a band engagement portion at the proximal end; a main body portion having a proximal end and a distal end, and a longitudinally extending portion at the proximal end of the main body portion, the longitudinally extending portion having a proximal and a distal end, and the main body portion includes a head portion located at the proximal end of the main body portion; and a spring bias mechanism coupling the retractor to the main body portion, the spring bias mechanism includes a pair of flexible bow shaped arms, the bow shaped arms having a proximal end and a distal end, the distal ends of the bow shaped arms are coupled at the distal end of the retractor, the proximal ends of the bow shaped arms are coupled to the distal end of the longitudinally extending portion, the spring biased mechanism having a static position and a fully active position, wherein in the static position the head portion is spaced apart from the band engagement portion a first distance, and in the fully active position the head portion is spaced apart from the band engagement portion a second distance which is greater than the first distance, the flexible bow shaped arms provide an actuator for urging the spring bias mechanism towards the fully active position.