Dental depot : specialities : chairs, cabinets, lathes, engines, etc. / C.J. Plucknett & Co.

  • C. J. Plucknett & Co., Limited.
Date:
[1885?]
Catalogue details

Licence: Public Domain Mark

Credit: Dental depot : specialities : chairs, cabinets, lathes, engines, etc. / C.J. Plucknett & Co. Source: Wellcome Collection.

Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.

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    lib Fis. 2. SOLILA TEETH. It looks as though the new Solila '' Teeth had a great future before them. One thing seems to be certain, that is, that these teeth are much stronger than any other teeth made with pins baked in the porcelain, including all platinum pin teeth. Thousands of tests have been made by individual dentists and dealers, and in each case it has taken twice the amount of power to break a Solila Tooth as it would to break any other pin tooth. There are several reasons which explain the greatly increased strength of Solila Teeth, but to go into the matter deeply would mean taking up several pages. We will, therefore, endeavour to condense the explanation into as few words as possible for the benefit of our readers. There is an enormous difference between the expansion and contraction of platinum and porcelain. Platinum expands 2^ times as much as porcelain. The baking of a solid pin into the porcelain often produces small cracks around the pin in the porcelain, and these minute cracks weaken the tooth considerably. Furthermore, the porcelain usually surrounds the pin entirely, and when a strain is exercised upon the tooth the pressure is first put on the outer part of the tooth Before it reaches what should be the point of maximum resistance—the centre of the tooth — the porcelam at the surface of the tooth has been strained. Therefore the power of resistance of the porcelain of the tooth has been divided up and the tooth materially weakened. Testing ''Solila'' Teeth. Test any teeth with baked-in pins, and you will find that the pins of Solila Teeth are considerably stronger because they have a more scientific anchorage than any other teeth. Prove it in this way. Hold the tooth firmly in a pair of pliers which have square beaks so that the pins cannot slip. Do it in the way illustrated. Hold the tooth with the pliers, and, v/ith the thumb of the other hand press very gradually upwards upon the tooth until it breaks. You will find it surprisingly easy to force the porcelain off when testing other teeth—surprisingly difficult when testing Solila Teeth. They are the only teeth produced which are always free from fire cracks in the porcelain where pin is baked in. Teeth with baked-in pins can scarcely ever be made without these cracks being created, for the obvious reason that there is a difference in the co-efficient of expansion and contraction between porcelain and platinum. The flat surface of Solila Teeth is not called upon to offer resistance until after the centre of the tooth has yielded its maxi- mum resistance ■' Solila Teeth are the only sane substitutes for platinum pin teeth for vulcanite work. c:^! Furthermore the leverage produced by the pressure of occlusion puts an enormous strain upon the sharp corners of the surface of the tooth (see illustration. Fig. 1). Nothing of this kind occurs with Solila Teeth, and we will shew why it does not. ^-z^i By an improved process the pin is not baked into the porce- lain—therefore a tooth is produced which is absolutely free from fire cracks. Then again the pin depends for its anchorage upon the centre of the tooth, and the centre of the tooth only, thus leaving the vital parts of the porcelain upon the surface of the tooth entirely free from any possibility of strain (see illustration. Fig. 2). -DjeASi This means that the entire resistance which the porcelain can offer is concentrated upon the spot which is the strongest and most capable of offering resistance, namely, the centre of the tooth.* ^),.iWe understand Solila Teeth will be made with solid plati- nurn pins, also with gold-clad pins. The latter pin, we are informed, is obtained by drawing a tube of solid 24 carat gold over a white metal wire by a process similar to the one employed in the manu- facture of gold-cased jewellery. tsi^SS.i;] i(Jr3fD.,By this means a pin is produced upon which the fluids of the mouth cannot possibly have any corrosive action. p-c\-^ 2:.^ Solila Teeth are made for vulcanite work, and for that reason are supplied with headed pins only. A headed pin offers a better anchorage in the vulcanite than a long pin, and saves the time usually spent in bending pins. The upper fronts of Solila Teeth are flat-back teeth. Ask for Full Pamphlet. Teeth, ' Solila Per 100 Per 100 in 500 lots Now single n Stock at the following Prices: 6^d each. Per 100 in 1,000 lots, 46/- 49/- Per 100 in 2,500 lots, 45/- 48/ A NOVELTY IN DIATORIC TEETH. The Wired Hdlsmann's Patent. No. 5357-09. Sole Agents: C. J. PLUCKNETT & Co., Ltd. A Perfect Fastener—The patent consists of two wires, Horizontal and Vertical, passed through specially made holes, making the wired tooth the strongest and best on the market. Try a Sample Set—you will be pleased with them. Sold only in Upper and Lower Fronts. 6's at following prices:—15/- per 100. 14/- per 100 in lots of 500. 13/- per 100 in lots of 1,000. Ask for Sample Set of 6, 1/-, post free.