| 摘要 |
The present invention discloses a self-adjusting matrix system for tooth restoration without a tightness retainer. It consists of a stainless steel band having "U" shaped wire springs which links the band ends together. The band is rolled up around the tooth to be restored and held in position by means of said "U" springs. The "U" springs are soldered, or fastened through code-coloured matrices and part of the band could be in cellophane for light hardening of the amalgam. |
