Dentistry – Apparatus – Having static product shaping surface
Patent
1984-03-06
1985-06-18
Peshock, Robert
Dentistry
Apparatus
Having static product shaping surface
A61C 504
Patent
active
045239096
ABSTRACT:
A dental matrix for engaging around a tooth comprises a plastic sheet member which is preferably transparent and includes a straight winding portion connected to a curved tooth engaging portion. The gingivally recessed straight windable portion is wound into a coil and heat treated to retain a desired inside and outside diameter for the coil. A first end of the straight windable portion which is disposed in the interior of the coil is provided with a metal laminate, ridges or a clip for permitting engagement with a winding tool for further winding and tightening the cylindrical coil, to adapt the matrix to the tooth. A second end of the sheet member which is carried by the curved tooth engaging portion has lock-loop recesses or extrudedly rimmed apertures for receiving a metal lock-loop which is thus fixed to the second head end member and slidably receives an intermediate portion of the member which is between the coil and the second end. This forms the curved tooth engaging portion into a band for engagement around a tooth and permits a sliding drawing of the intermediate portion with respect to the second head end of the sheet member for tightening and locking of the band around the tooth.
REFERENCES:
patent: 3421222 (1969-01-01), Newman
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