US2063667A - Filling cavities - Google Patents

Filling cavities Download PDF

Info

Publication number
US2063667A
US2063667A US655667A US65566733A US2063667A US 2063667 A US2063667 A US 2063667A US 655667 A US655667 A US 655667A US 65566733 A US65566733 A US 65566733A US 2063667 A US2063667 A US 2063667A
Authority
US
United States
Prior art keywords
filling
solution
cavity
tooth
filling mass
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US655667A
Inventor
Farkas Ladislaus
Harteck Paul
Original Assignee
Farkas Ladislaus
Harteck Paul
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to DE2063667X priority Critical
Application filed by Farkas Ladislaus, Harteck Paul filed Critical Farkas Ladislaus
Application granted granted Critical
Publication of US2063667A publication Critical patent/US2063667A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C5/00Filling or capping teeth
    • A61C5/50Implements for filling root canals; Methods or instruments for medication of tooth nerve channels

Description

cowosmons, Cross Reference txam'ner COATING 0R PLASTIC Dec. 8, 1936. L 'A KA' ET AL 2,063,667

' FILLING cmfxnss Original Filed Feb. 7, 1933 Lad is lqus Far/(as and I 6 "Paul H ar-tetk l five/722: -M J-M M Attorney UNITED STATES PATENT OFFICE 2,063,667 FILLING cAvrrms Ladislaus Farkas and Paul Harteck, Berlin, Germany Application February 7, 1933, Serial No. 655,667.

Renewed July 28, 1936. In Germany February 13, 1932 Claims.

Our invention relates to the filling of cavities with a suitable mass. The hitherto known methods of filling or closing cavities, such as small fissures, cracks, slits, or ridges in any kind of 5 material, with a solid substance, consist in introducing into the cavity a substance in liqui state and causing said liquid to solidif e cavity. The introduction of the liquid substance 3 into the narrow cavity, however, presents con- 1 siderable difiicultiesyjheamor any other inert [9 gas, present in the avity, does not escape entirely, but forms bubbles in the liquid during its introduction and thereby prevents this latter from s completely filling the cavity. The difliculties are $1specially great when a cavity closed on one side is to be entirely filled.

These disadvantages are very seriously noticeable in dentistry. If for instance the root canals of the teeth are to be filled, it is especially important that the filling extends right to the apex of the root-canal and also completely fills the very fine lateral ramifications. In practice it was not possible hitherto to reliably fill cavities of the kind mentioned in all their parts because the air could not be entirely expelled by the filling substance and thus prevented this latter from completely penetrating into the canals.

We have found that the difiiculties described can be overcome by the new steps forming part of our invention. The air, or any other inert gas present in the cavity to be filled, is, in the first place,replacedbya gas adapted to react with the filling mass used, such as, for instance, carbon dioxide (CO2). If now a filling mass having an alkaline reaction is introduced into the cavity, e. g. a root-canal filled with carbon dioxide, it absorbs this gas and, thereby, is sucked into the canal and may penetrate right to the apex of the root and into the tiniest canals without any reslstance.

Our invention is not restricted to the use of carbon dioxide, it being possible, for instance, to use ammonia in connection with a neutral or acid filling mass adapted to absorb ammonia in a physical or chemical way, or a halogen or a hydrogen halogenide, or S02, the filling mass consisting of aqueous solutions or organic materials which are fit to absorb these gases With our improved method the filling mass must be liquid. If it is desired subsequently to have it solidified or in a paste-like consistency, a composition is used which is capable of solidifying in the cavity after some time.

We have found that in this case preferably a mixture is used which not only causes the gas and the main mass to react with one another, but leads to a further reaction which proceeds more slowly and which causes the filling to solidify.

Thus, a material may be added to the liquid filling mass which reacts with the solvent in a binding reaction. A part of the solvent is thereby directly absorbed and the combination between the added substance and the solvent may also result in the formation of reaction products, e. g. ions, which in turn act as precipitating agents. We add, for instance, gypsum to an aqueous solution having an alkaline reaction. The gypsum gradually absorbs water and forms ions which precipitate one of the dissolved materials so that, owing to cooperation of these factors, the mixture solidifies after a certain time. In most cases it is still more advisable to employ a substance which at the beginning is dissolved in the solution employed, e. g. a suitable acid anhydride or a lactone. As in these cases slow reactions arise, the mixture coagulates only after a certain time which can be varied at will by the choice of suitable components.

A slow reaction and solidification, the duration of which can be controlled to a great extent by properly choosing and mixing the components, also takes place when an ester is added to an alkaline filling mass. The ester is gradually saponified, thus partly neutralizing the solution, and causing salts to form and to precipitate in the solid state and giving rise to the precipitation or coagulation of further dissolved substances. It has, for instance, been found advisable to use as a filling mass a solution of water-glass in a solution of sodium hydroxide with an ester added.

Owing to the presence of the sodium hydroxide,

the filling mixture is sufiiciently thinly liquid even with a high percentage of water-glass. The chemical processes in this system are the following:The ester is gradually saponified by the caustic soda solution, thereby forming an alcohol and an acid. The acid neutralizes part of the caustic soda; the salt so formed together with the alcohol precipitates the water-glass, forming a silicious skeleton which fills the entire cavity.

It is a particular advantage of our process that m6. cowosmous, i

COATING R PLASTIC of two or more substances, or mixtures, which are kept separately and are mixed only shortly before being used. In order to obtain a thorough mixture, it is advisible to give to the single components a similar specific gravity.

If, in the above-mentioned composition, the specific gravity of the ester difiers from that of i the solution to which it is added, it may be mixed 20 mixed, be as small as possible, so that they can easily be worked into a fine emulsion which remains stable until the whole substance is solidified. This can be attained by adding an emulsifying agent; highly polymeric natural products,

25 or for instance ethyl cellulose, or gelatine are,

among others, suitable for this purpose.

We have found furthermore that the precipitate becomes particularly uniform if a carbohydrate, or a pclyvalent alcohol such as mannitol,

30 or glycerol, and also sugar is added to the solution.

We may use as a filling mass a thixotropic liquid. Such liquids solidify after an exactly determined time which, by additions to the liquid, can be controlled finely and in very broad limits.

It is, of course, possible to use several of the means described at the same time, e. g., add an ester and a lactone to a strongly alkaline solution of water-glass.

In dentistry, one of the ordinary disinfectants 40 may be added to the filling mass, e. g., chlorothymol or iodoform. As these substances are not soluble in water but highly soluble in organic solvents, it is advisable when using an ester to dissolve it in this latter and to add the solution ob- 45 tained to the filling substance.

In many cases, especially in dentistry, it is desirable that the finished filling be visible in the radiograph. For this purpose a compound of an element with a high atomic weight is added to 50 the filling mass. Thus, caesium hydroxide is used instead of or together with, the caustic soda, or an appropriate iodine compound, such as an iodide, is added.

Examples (1) Commercial sodium water-glass has potassium hydroxide added until the solution is 0.25 normal and with so much NaCl that precipitation of silicic acid is just avoided; shortly be- 00 fore using, finely pulverized half overburnt gypsum is stirred into this solution. The mixture is sucked into the cavity by the carbon dioxide and solidifies there, after the gypsum has been hydrated.

65 (2) 100 cc. of a commercial solution of waterglass, having a specific weight of 1.33, are diluted with 65-70 cc. of water, and 50 g. of mannitol and 5-8 g. of solid caustic soda are dissolved therein; besides, 70 g. or a mixture of K1 and 70 CsI may be added. Before use, 1 part of a second mbn is added to 8 parts of this solution, this second solution having about the same specific weight and consisting of methyl acetate with several per cent of ethyl iodide or ethylene bro- 76 mide.

Cross Reference (3) 6-8 g. KOH and 25 g. of a mixture of KI, RM and CsI are dissolved in '75 cc. of a commercial water-glass solution, and the solution is diluted with 15-20 cc. of glycerol. This solution is emulsified with almost the same quan- 5 tity, but not more, of a mixture of 30 volume parts of ethyl acetate, '70 volume parts of iodated benzenes or bromoform and 1-3 parts of ethyl cellulose and gelatine.

(4) 100 cc. of water-glass solution, having a 10 specific weight of 1.33, are mixed with 30 cc. of glycerol, and 35 g. of a mixture of about equal parts of KI, RbI, CsI are dissolved therein. 5 parts of this solution are mixed-prior to use with 1 part of a second solution, which consists of salicylic or benzoic methyl ester, ethyl acetate and diiodobenzene. To the second mixture small quantities of purest gutta-percha can be added as an emulsifying agent and about 3% of chlorothylmol as a disinfectant.

(5) 30 volume parts of a saturated aqueous solution of bismuth-nitrate and mannitol are mixed with 70 volume parts of a water-glass solution, which is normal with respect to KOH; to this solution some per cent by weight of an alkali iodide may be added. Prior to use, 15 volume parts of a mixture of methyl and ethyl acetates are added to this solution.

Filling masses of the kind described are sucked into the cavity by the carbon dioxide on acmount of their alkaline reaction; owing to their contents in elements of high atomic weight, the finished fillings are visible in the radiograph.

When carrying out the process, it must be taken into consideration that the cavity to be filled, e. g., the tooth-root canal, must be filled with the gas and does not contain any air, or any other inert gas, when the filling substance is introduced.

For the performance of our new process a special device can be used. This device consists substantially of a double canula the one tubule of which projects over the other, and to which, at a proper distance from the end, a rubberplate, or the like, can be fixed, which during the process is placed on the edge of the cavity, e. g. of the tooth. The gas is introduced through the shorter tubule of the canula, and then the filling mass through the longer projecting tubule. So a quiet afllux of the filling mass is obtained, and this latter will not be ejaculated again from the cavity, e. g., the root-canal, by the gas in a stage in which the gas is still flowing and the filling mass has already been allowed to enter the cavity. The rubber-plate elastically covers the cavity and makes it difilcult for air to enter the root-canal during the filling operation.

In the accompanying drawing the use of our improved device is shown by way of example, the double canula serving for filling a tooth-root canal according to our improved process.

According to Fig. l, the root-canal w of the drilled tooth, the nerve of which has been killed and removed, is filled with the aid of the device. Through the tubule a carbon dioxide is allowed to enter for about 1 minute, and then a filling mass of an alkaline reaction is let in through the tubule b. The rubber-plate is designated by the letter 0.

Fig. 2 shows the same double canula in crosssection.

In Fig. 3 a double canula is shown in which the one tubule is not fixed into the other, but the two tubules a. and b are arranged one beside the other. It is, or course, also possible to com- Examine:

pose the canula of more than two tubules. In this case the gas tubules must be shorter than those through which the liquid is introduced.

For the purpose of treating teeth the canula has preferably a circular cross-section. Otherwise, its cross-section will be adapted to the form of the cavityto be filled.

For dental purposes the canula may consist of non-corrodible steel or nickel, or, if desired, platinum. The canula described can be arranged in such a manner that it may be fastened to one of the usual carbon dioxide cylinders. In connection therewith a tap is used which permits cutting of! the flow of carbon dioxide as soon as, or immediately after the filling mass begins to be introduced.

We claim:

1. A process for filling tooth cavities, comprising the steps of replacing any inert gas contained in the tooth cavity by a gas adapted to be absorbed by the tooth filling mass and then introducing the tooth filling mass.

2. A process for filling tooth cavities, comprising the steps of replacing any inert gas contained in the tooth cavity by a gas adapted to be physically absorbed by the tooth filling mass, and then introducing the tooth filling mass.

3. A process for filling tooth cavities, comprising the steps of replacing any inert gas contained in the tooth cavity by a gas adapted to be chemically absorbed by the tooth filling mass, and then introducing the tooth filling mass.

4. A process for filling tooth cavities, comprising the steps of replacing any inert gas contained in the tooth cavity by carbon dioxide, and then introducing a tooth filling mass having an alkaline reaction.

5. A process for filling tooth cavities, comprising the steps of replacing any inert gas contained in the tooth cavity by a gas adapted to be absorbed by the tooth filling mass, and then introducing a filling mass adapted to solidify in the cavity.

LADISLAUS FARKAS. PAUL HARTECK.

US655667A 1932-02-13 1933-02-07 Filling cavities Expired - Lifetime US2063667A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE2063667X 1932-02-13

Publications (1)

Publication Number Publication Date
US2063667A true US2063667A (en) 1936-12-08

Family

ID=7983211

Family Applications (1)

Application Number Title Priority Date Filing Date
US655667A Expired - Lifetime US2063667A (en) 1932-02-13 1933-02-07 Filling cavities

Country Status (1)

Country Link
US (1) US2063667A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3247593A (en) * 1963-03-29 1966-04-26 Eagle Chemical Co Silicious dental filling
US4708889A (en) * 1986-06-23 1987-11-24 Motorola, Inc. Glass repair of hermetic packages

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3247593A (en) * 1963-03-29 1966-04-26 Eagle Chemical Co Silicious dental filling
US4708889A (en) * 1986-06-23 1987-11-24 Motorola, Inc. Glass repair of hermetic packages

Similar Documents

Publication Publication Date Title
Dow et al. Isotope determination of root canal failure
Pérez‐Heredia et al. Decalcifying effect of 15% EDTA, 15% citric acid, 5% phosphoric acid and 2.5% sodium hypochlorite on root canal dentine
Andersen et al. In vitro solubility of human pulp tissue in calcium hydroxide and sodium hypochlorite
Vertucci et al. Apical leakage associated with retrofilling techniques: a dye study
CA2723010C (en) Composition and method for cream bleach product
AU605766B2 (en) Prevention of outgassing in polyvinylsiloxane elastomers by the use of finely divided platinum black
US5092888A (en) Hardening material
Limkangwalmongkol et al. Apical dye penetration with four root canal sealers and gutta-percha using longitudinal sectioning
Tanomaru-Filho et al. Evaluation of pH and calcium ion release of root-end filling materials containing calcium hydroxide or mineral trioxide aggregate
Vilanova et al. Effect of intracanal irrigants on the bond strength of epoxy resin‐based and methacrylate resin‐based sealers to root canal walls
US4235633A (en) Dental compositions
Fridland et al. Mineral trioxide aggregate (MTA) solubility and porosity with different water-to-powder ratios
JP4007501B2 (en) Hair bleaching products
ES2545256T3 (en) Pasty multi-components for injectable phosphocalcic cements
US4556561A (en) Compositions and methods for topically fluoridating and/or mineralizing dental tissue
US3919774A (en) Combination endodontic apical sealer and crown post
Kolokouris et al. In vivo comparison of the biocompatibility of two root canal sealers implanted into the subcutaneous connective tissue of rats
US4064629A (en) Cavity liner for dental restorations
CA2334687C (en) Dental root canal filling, retrofilling, and perforation repair materials
Sugawara et al. In vitro evaluation of the sealing ability of a calcium phosphate cement when used as a root canal sealer-filler
Nicholls Treatment of traumatic perforations of the pulp cavity
JP5269600B2 (en) Dental and endodontic filling materials and methods
Sciaky et al. Localization of calcium placed over amputated pulps in dogs' teeth
EP0480472B1 (en) Dental composition which can be prepared and processed under vibration, and method for its preparation
EP0290433B1 (en) Method and apparatus for preparing a self-curing two-component powder liquid bone cement