Improvements in dental clamps / [Joseph Milton Strout].

  • Strout, Joseph Milton.
Date:
1894
Catalogue details

Licence: Public Domain Mark

Credit: Improvements in dental clamps / [Joseph Milton Strout]. Source: Wellcome Collection.

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    N° 2614 A.D, 1894 Date of Application, 6th Feb., 1894 Complete Specification Left, 29th Sept., 1894—Accepted, 3rd Nov., 1894 PROVISIONAL SPECIFICATION. Improvements in Dental Clamps. I Joseph Milton Strout of 457^ Congress, in the County of Cumberland and State of Maine, United States of America, Dentist, do hereby declare the nature of this invention to be as follows :— My invention has for its object to provide a dental clamp adapted to be used ,F) upon any tooth of an upper or a lower set, and capable of being expeditiously and conveniently applied and removed, the construction of the clamp being such that while effectually holding the rubber dam in position and pressing the gum from the neck of a tooth so as to expose a cavity w7ell down in the neck it will in no way interfere with the movements of the operator. PI The clamp consists of a body and an extension arm together with a fastening device connecting the two. The body consists of a metal plate bent upon itself to form essentially a U id cross section, the members of the body being carried inward towards each other to form side flanges. The side and bottom portions of the body are therefore entirely open. This is preferably made of spring metal and the 15 body is adapted to fit over a tooth covering the crown and extending down opposite sides of the tooth practically to the gum. The arm forming an extension of the body is provided with a longitudinal slot and it is connected to the body by a screw stud which projects from the body and passes through the slot, being secured therein by a nut which holds the arm firmly in place when tightened, but when 20 loosened permits of ready adjustment of the arm either to lengthen or shorten it or otherwise. The arm is provided with a finger piece either integral therewith or pivotally connected thereto. The outer extremity of the finger section, when the finger is to be applied to certain teeth, is made to terminate in two claws, bent upon opposite portions so as to stand at angles to the finger, or diagonally thereof, 25 and the surface of the finger connecting the two claws is rendered more or less concave. In the operation of the clamp the rubber dam is placed in the mouth of the patient and the body of the clamp is placed over a tooth removed a convenient distance from the tooth to be operated upon. The arm is then adjusted in a 30 manner which will cause the clawr portion of the finger section of the arm to engage with the rubber dam at the neck of the tooth to be operated upon, and the arm is then pressed downward or upward as required, until the dam and the gum have been pressed one toward and the other from the neck of the tooth to expose the cavity to be operated upon. The nut is then screwed up until the tension arm is 35 held firmly in the position in which it was placed, and consequently the dam and gum will be held away from the cavity until the clamp is removed. One face of the claw section of the arm is concaved, said concavity wrhen the clamp is integral with the arm serving to remove said arm the greatest possible distance from the cavity, permitting the free use of the instruments. 40 It will be observed that the clamp is in no manner in the wmy of the operator and that it may be expeditiously and conveniently applied to any tooth of either the upper or the lowrer set ; furthermore, that the shape of the extension arm may be changed in order that the outer faces of the teeth may be treated. In fact, extension arms of various shapes may be used in connection with the same body, 45 or a screw and nut may be attached to both sides of the body of the clamp, in order that twro arms may be attached at the same time, to be used in setting artificial crowns upon natural roots. [ Price 8d.]