Improvements in or relating to mineral fillings for teeth / [William Francis Mellersh].
- Mellersh, William Francis.
- Date:
- 1903
Licence: Public Domain Mark
Credit: Improvements in or relating to mineral fillings for teeth / [William Francis Mellersh]. Source: Wellcome Collection.
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![N° 16.126.—A.D. 1903. Mcllersh’s Improvements in or relating to Mineral Fillings for Teeth. This matrix is partially filled with enamel body which is then fused. The core to help form the contour is then by means of a little fluid enamel body made to adhere to the fused mass in the impression, and then fused in place. Subsequently it is covered with the enamel body and the exact contour desired obtained by subsequent fusing. When the moulded filling has cooled it is 5 ready to be inserted in the tooth cavity and fits with absolute accuracy the tooth cavity to which it has been moulded. Grooves are cut m the cavity and coire¬ sponding projections produced on the filling to ensure a firm attachment, and the filling cemented in place. This construction of enamelled porcelain lips or contours for teeth is distin- 10 guished from the attempts in this direction which have previously been made, inasmuch as all the objects aimed at, viz., a repairing piece which shall possess ample strength for the purpose in view combined with sightliness and con¬ formity to the appearance of the remainder of the tooth is completely attained, the core being so intimately united with the enamel that the two cannot become 1 ,r) disassociated, and so that the core supports the enamel throughout, and a homo¬ geneous whole is the result. The enamel body produced from the formulae of Dr. Jenkins of Dresden is especially suitable for this operation, as English porcelain and this enamel are closely akin in structure. Hence a contour produced by the union of these V() materials produces a homogeneous filling which cun if necessary be subse¬ quently cut and polished to any desired extent. The forms illustrated in Figures 2 to 4 are intended when ground to exact shape required to be fixed to broken teeth or stumps, much in the same wav as the well known porcelain crowns now in use. They are, however, produced ^5 by my method as above set forth. Owing to the fact that the enamel inter¬ penetrates the porcelain core, these pieces can be ground to any required shape to fit the surface to which they are applicable and yet present on the worked surface a hard and smooth face. In conclusion I may state that I am aware that it is not new to* provide ^ porcelain fillings for teeth also to fill cavities with various originally plastic- preparations, or with enamels shaped by fusion in matrices having the impression of the cavity and subsequently hardened before placing in position, and I make no claim to these known devices, but Having now particularly described and ascertained the nature of my said 35 invention and in what manner the same is to be performed, I declare that what I claim is : — 1. Improved process for tooth repairing which consists in replacing the missing portion of the tooth by a core of porcelain interfused with a completely sur¬ rounding envelope of enamel and moulded to the exact configuration of saia 40 missing portion substantially as set forth. 2. A tooth filling piece consisting of a porcelain core with completely surround¬ ing enamel covering united by fusion and moulded to the shape of the cavity. 3. A substitute for a missing portion of a tooth consisting of a porcelain wedge-shaped core embedded in enamel, substantially as described. 4 5 4. A tooth filling piece comprising {a porcelain wedge having triangular form and a sharp basal edge and an enamel envelope fused thereon and com¬ pletely covering the porcelain surface, substantially as described. Dated the 21st day of July, 1903. W. P. THOMPSON & Co., 50 322, High Holborn, London, W.C., and 6 Lord Street, Liverpool, Patent Agents for the Applicant. Redhil]: Printed for His Majesty's Stationery Office, by Love & Maleomson. Ltd,—1903.](https://iiif.wellcomecollection.org/image/b30734782_0002.jp2/full/800%2C/0/default.jpg)
