Specification of Henri Adrien Bonneville : mineral teeth.

  • Bonneville, Henri Adrien.
Date:
1869
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Henri Adrien Bonneville : mineral teeth. Source: Wellcome Collection.

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    Bonneville's Improvements in the Manvfacture of Mineral Teeth. attached to the dental piece. The hole being obtained by placing on the rear side of the tooth, which is moulded of materials well known to tooth manufacturers, a base or piece of wood or any other material cut into the shape of a cone and fusible at a lower degree of temperature than that required for the tooth, the said piece of wood or other material 5 being consumed or done away with during the process of biscuiting there remains in the centre of the tooth a hollow corresponding in size and shape with the base which has disappeared. The principle of strength claimed for this tooth exists in the fact that the rubber which forms part of the dental piece to which it is to he attached entering into 10 the tooth itself, the tooth actually forms part and parcel, so to speak, of the dental piece. Having thus given a brief description of this Invention, I will proceed to enter into further details regarding it. Heretofore mineral teeth have been made in Europe as well as in America so as to enable the dentist to 15 attach them either to metal or to vulcanised rubber platina pins em¬ bedded in the teeth, these platina pins being absolutely necessary for metal work, whilst for rubber work exclusive various contrivances have been resorted to, consisting in hollows cut into the sides or hacks, or in both combined, of the teeth, or in holes pierced vertically through the 20 same. These contrivances have generally been pronounced by the dental profession as perfectly useless, and the defective (for rubber) platina pins have, for want of better, remained in use. Recently the use of a button attachment composed of the same material as the tooth itself has been introduced, but this also, in addition to its want of solidity, the point cut 25 in under the head of the button being composed of the same brittle material (porcelaine) as the tooth, and lacking the strength which the tooth itself as a solid body naturally possesses, has the still greater defect of adding to the thickness and consequent clumsiness of the tooth, which requires a thick rim of rubber for its embedment. 30 Now, the improvements secured by the said Letters Patent overcome all these defects. In making the said improved teeth they are moulded as described with materials well known to teeth manufacturers, and there is placed a part, say less than one-half, of the body and enamel on the face side of the tooth or mould; a somewhat greater quantity is placed on 35 the other or back side of the mould ; then the base of a piece of wood cut into the form of a cone with its top cut off, as described before, is placed on the face side, the point or apex of the cone presenting itself upper-