| 摘要 |
A dental impression dam system (10) utilizing an open tray (12) forming a basin (26) for dental impression material (40). The basin (26) of the tray (12) includes a gap (28, 30) at an extremity of the same. A flexible band (3 4, 36) of porous material bridges the gap (28, 30) of the tray basin (26) and interacts with the dental material (40) to form unit. The flexible band (34, 36) adheres to the external wall portions (24) of the tray (12) when in plac e.
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