Improvements in artificial teeth / [Cassius Montezuma Richmond].

  • Richmond, Cassius Montezuma.
Date:
1891
Catalogue details

Licence: Public Domain Mark

Credit: Improvements in artificial teeth / [Cassius Montezuma Richmond]. Source: Wellcome Collection.

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    N? 12,425 A.D. 1890 Date of Application, 8th Aug., 1890 Co mplete Specification Left. 8th May, 1891—Accepted. 13th June. 1891 FU0VISI0NAL SPECIFICATION. Improvements in Artificial Teeth. ■ !lC;A,SSIUS Montezuma Richmond, of 10 Park Square West, Regents Park, in the County of Middlesex, Dental Surgeon, do hereby declare the nature of this invention to be as follows :— * .TJ1® ?bJec* mY invention is to effect improvements in the construction of ° artificial tooth crowns, intended for attachment to natural roots. My improved tooth crown is formed of porcelain in the usual way, and has a platinum tube moulded and baked into it. This tube is provided with an internal screw thread, so that a metal pin can be screwed and cemented into it after the tootli has been baked. The projecting part ot the said pin is cemented into a hole formed in the natural root, to fix the crown thereon, in the ordinary manner. According to the usual method of construction a pin is moulded into and baked with the crown, necessitating the employment of a platinum pin and thus adding- considerably to the cost of the tooth ; but my invention enables the cost of such artificial cr?wns .t° be materially reduced, for as the pin is not baked in with the crown the said pin may be formed of steel, brass, nickel or other suitable cheap metal while at the same time the security of attachment is equal to the old method with the additional advantage that a broken or injured pin can readily be replaced by a new' one at any time. 1 20 Dated this 8th day of August 1890. AMBROSE MYALL, 21, Cockspur Street, London, S.W., Agent for the Applicant. COMPLETE SPECIFICATION. Improvements in Artificial Teeth. 25 I, Cassius Montezuma Richmond of 10 Park Square West Regents Park in the County of Middlesex, Dental Surgeon, do hereby declare the nature of this invention and in what manner the same is to be performed to be particularly described and ascertained in and by the following statement :— The object of my invention is to effect improvements in the construction of 30 artificial tooth crowns, intended for attachment to natural roots. My improved tooth crown is formed of porcelain in the usual way, and has a platinum tube moulded and baked into it. This tube is provided with an internal screw thread, so that a metal pin can be sciewed and cemented into it after the tooth has been baked. The projecting part 35 of the said pin is cemented into a hole formed in the natural root, to fix the crown thereon, in the ordinary manner. According to the usual method of construction a pin is moulded into and baked w'lth the crown, necessitating the employment of a platinum pin and thus adding consideiably to the cost of the tooth, but my invention enables the cost of such 40 artificial crowns to be materially reduced, for as the pin is not baked in with the crow n, the said pin may be formed of steel, brass, nickel or other suitable cheap metal, while at the same time the security of attachment is equal to the old method, with the additional advantage that a broken or injured pin can readily be replaced by a new' one at any time. 45 In order that my said invention may be fully understood and readily into effect I w'ill proceed to describe the drawing hereunto annexed, 11'rice 6*2.]