| 摘要 |
The invention relates to a dental matrix retainer ( 1 ) used as an aid when filling two-surface cavities in the molars. It comprises a matrix holder ( 3 ) and a device for tensioning a matrix band ( 2 ) placed in the form of a loop ( 22 ) around the tooth which is to be treated, the matrix holder ( 3 ) being composed of a housing ( 5 ) with a circular opening ( 8 ), and of a spindle like inner body ( 9 ) which can turn in this opening ( 8 ) and which is provided with a gap ( 12 ). The gap ( 12 ) can be aligned with a slit ( 10 ) in the wall of the housing ( 5 ) such that the superposed ends of the matrix band ( 2 ) can be inserted into this slit ( 10 ) and into the gap ( 12 ) aligned therewith and can be tensioned on the tooth by turning the spindle ( 9 ).
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