| 摘要 |
PCT No. PCT/US83/01401 Sec. 371 Date May 17, 1984 Sec. 102(e) Date May 17, 1984 PCT Filed Sep. 15, 1983 PCT Pub. No. WO84/01100 PCT Pub. Date Mar. 29, 1984.An improved dental matrix band of the general type having a central tooth circumscribing portion extending between cervical and occlusal edges and merging with a pair of arms adapted for engagement by a retainer appliance and to which a leaf-like flap is secured to the tooth engaging surface of the band to be deformable away from the band by a compressible wedge against the surface of a tooth to be filled. The flap has an inner edge generally coextensive with the cervical edge of the band and extends to an outer edge coextensive with or beyond the occlusal edge of the band. The flap is secured at only one corner either by a pair of spot welds to leave remaining the major area of the flap to be deflectable against the surface of a tooth. Alternatively, the flap is secured by a bendable neck portion integral with both the flap and the band.
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