| 摘要 |
The invention describes rubber dam punches that punch the entire slit or central opening in a rubber dam membrane in order to prepare the conventional rubber dam for the slit-dam technique. The invention further describes rubber dam punches capable of lengthening the central opening in a rubber dam that is specifically designed for general field isolation. The rubber dam punches of the invention include a series of embodiments having upper and lower arm members, each arm member further having a gripping handle at one end of the arm member and an operative end extension at the opposite end of the arm member. The arm members are pivotally connected and have male and female slits dies attached to the operative end extensions which are used punch slits and/or holes of varying widths in dental rubber dam membranes in order to create or lengthen existing central openings in general field isolation rubber dams.
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