Tartar removal instrument
First Claim
1. An instrument for removing tartar, including a handle having at least at one end a steel working portion formed with a sharp edge for scraping a tooth clean, characterized in that the working portion consists of an arm the free end portion of which has dimensions such that it can be moved into the space between a pair of juxtaposed teeth or along a tooth and down below the gum line;
- in that the end portion has rounded-off edges to obviate damage to the gum; and
in that said end portion is made with at least one through-opening which at least at one end of the opening has an edge which at least along a part of the periphery thereof is formed into a scraping edge with a predetermined cutting angle, the end portion of the arm forming a blade both sides of which are convex so that the cutting angle at the edges of the opening will be less than 90°
, at least along the greater portion of the periphery of the respective edge.
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Accused Products
Abstract
An instrument for removing tartar consists of a handle having a working portion with its outer end formed into a blade dimensioned to be moved down along the tooth and below the gum recess. The side and end edges of the blade are rounded-off to obviate damage to the gum. For scraping or planing off tartar or other deposits on the tooth, the end portion of the blade has a through-opening with edges made as cutting edges with a relatively large cutting angle.
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Citations
4 Claims
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1. An instrument for removing tartar, including a handle having at least at one end a steel working portion formed with a sharp edge for scraping a tooth clean, characterized in that the working portion consists of an arm the free end portion of which has dimensions such that it can be moved into the space between a pair of juxtaposed teeth or along a tooth and down below the gum line;
- in that the end portion has rounded-off edges to obviate damage to the gum; and
in that said end portion is made with at least one through-opening which at least at one end of the opening has an edge which at least along a part of the periphery thereof is formed into a scraping edge with a predetermined cutting angle, the end portion of the arm forming a blade both sides of which are convex so that the cutting angle at the edges of the opening will be less than 90°
, at least along the greater portion of the periphery of the respective edge. - View Dependent Claims (2, 3, 4)
- in that the end portion has rounded-off edges to obviate damage to the gum; and
Specification