Specification of Eugène D'Estanque : instrument for drawing teeth.

  • Estanque, Eugène d'
Date:
1862
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Eugène D'Estanque : instrument for drawing teeth. Source: Wellcome Collection.

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    D'Estariques Improved Instrument for Drawing Teeth. key or nipper, according to the impulsion given to the handle (A, B, Figure 2, and section Figure 1); Figure 9, moveable key or nipper which fits on to the rack, Figure 8 ; Figure 10, large molar seized by the instrument; Figure 11, rack with moveable curved piece. This rack is specially intended for the 5 extraction of large molars. Figure 13, key or hook, which becomes immove¬ able when fitted to the curve of the rack, Figure 11; Figure 12, branch with curved end, one extremity of this branch fits at E, Figure 10, and the curved end receives the tooth which the key (Figure 13) draws. In this branch is a groove in which enters a tenon fitted to the moveable curved branch of the 10 rack, Figure 11. This tenon prevents any deviation of the curved branch. Figure 14, my improved instrument withdrawing a canine; Figure 15, end of same, with the bits set for the extraction of a root or fang; Figure 16, the same, with eccentric bits, left side, for large molars; Figure 17, same, right side, shewn closed; Figure 18, two straight bits dismounted. 15 A, handle carrying the pinion which tooths into a rack which draws with it the moveable stem while producing an upward motion ; B, spring, which gives a moderate resistance; C, handle or shaft of the instrument, which serves as a fulcrum in the hand of the operator; D, nut, which is unscrewed to take the instrument to pieces; E, screw, which serves to dismount the spring. By 20 this instrument the extraction may be effected instantaneously or gradually, but always without any danger. Figure 19 shews a modification of my instrument by which the operator may extract teeth with great facility, using one hand only. No. 1, main branch, to which is fitted the lower bit; No. 2, branch which 25 penetrates into the interior of the main branch, it is held at the point No. 3 by a screw which leaves it free to play. A rod is added to the elbow of the branch No. 2 at the point No. 4. This moveable rod traverses the interior of the main branch and fits on to the upper bit or nipper; this bit is drawn by the rod when the two branches or handles D, D, are brought together, which is 30 done by the simple pressure of the hand. This rod further possesses, at the point H and on the two opposite faces, two small tenons which slide in a slot in the main branch; No. 5, spring which keeps the instrument open. To this instrument, as to the first-mentioned, may be adapted different bits or nippers, as shewn Figures 20, 21, and 22. 35 The principle of my Invention, whether for one or other of the above- described tooth-extracting instruments, is always the same, namely, a leverage the fulcrum of which is in the hand of the operator and outside the mouth. This fulcrum gives to the tooth-drawing instrument all the power that may be required for the several operations of tooth-drawing all at once by a motion