US2874467A - Artificial dentures and process of preparing - Google Patents

Artificial dentures and process of preparing Download PDF

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Publication number
US2874467A
US2874467A US432605A US43260554A US2874467A US 2874467 A US2874467 A US 2874467A US 432605 A US432605 A US 432605A US 43260554 A US43260554 A US 43260554A US 2874467 A US2874467 A US 2874467A
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US
United States
Prior art keywords
denture
dentures
lining
soft
artificial
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Expired - Lifetime
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US432605A
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English (en)
Inventor
Becker Wilhelm
Steuer Dieter
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Bayer AG
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Bayer AG
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Publication date
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Publication of US2874467A publication Critical patent/US2874467A/en
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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K6/00—Preparations for dentistry
    • A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
    • A61K6/884—Preparations for artificial teeth, for filling teeth or for capping teeth comprising natural or synthetic resins
    • A61K6/887—Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds

Definitions

  • the present invention relates to artificial dentures with soft cushion linings and particularly to a process of making such dentures and to providing satisfactory attachment between the soft cushion lining and the denture base material.
  • tissue side The tissue. of the mouth with which dentures are permanentlyincontact consists of mucous membrane and includes the gums. .
  • tissue side the side of the denture making permanent contact with the tissue of the mouth.
  • the application of the afore-said copolymers on artificial dentures to form soft cushion lining thereon can be accomplished by most various methods, for instance by leaving a recess ,on the tissue side of the denture or cutting away the portion of the denture to be replaced with the soft and non-hardening material, and applying this material to this place while effecting strong union between the softmaterial and the denture with the aid of an autopolymerizing plastic.
  • Suitable autopolymerizing plastics for this purpose are especially mixtures of polymers having a basis of methyl methacrylate with polymerizable liquid monomers which polymerize by addition of redox systems volatility.'.of the plasticizers these polymers show the.
  • Another method of preparing dentures with soft cushion linings consists in applying the soft and non-hardening material to a mixture of polymeric and liquid polymerizable compoundsand effecting solidification by polymerizing in a conventional denture mold with the application of pressure and heat (see copending application.
  • 'Ihe copolymers of acrylates or methacrylates together with butadiene can. be produced by the most various methods. Besides :acrylates or methacrylates, other polymeri'zable vinyl compounds ordivinyl compounds may be employed.
  • the term .butadiene as herein used is intended to refer to butadiene as such, its homologues and derivatives.
  • stabilizers are phenyl flnaphthylamine and the reaction products of substituted phenols and formaldehyde. ing to the invention are compoundsgiving off oxygen, for instance benzoylperoxide.
  • reducing substances there maybe used amines or organic sulfinic acids, salts or derivatives thereof. i
  • the soft and non-hardening materials obtained by the herein described process retain their soft consistency and are further distinguished by high tensile strength It was surprising that these polymers providean excellent adhesion with dentures prepared for instance from methyl methacrylate. This could not be foreseen since, as is known, the production of a' proper chemical union between non-hardening foils of natural rubber or polymers containing a high proportion oflbutadieue' with dentures of -plastic material involves 'difficulties'. Previously, these materials could often be attached to one another by mechanical anchorage only.
  • a particularly high technical advantage brought about by the present invention resides in the fact that polymerization of the denture base ma terials is not delayed bypolymerization-inhibiting stabilizers incorporated in the soft material. This is accomplished especially by the application of an excess of catalysts or by addition of reducing substances.
  • the catalysts or reducing substances can be added either by dissolving them in the monomeric component of the denture base material or applying them to the surface of foils prepared from the herein described copolymers in the form of a lacquer or varnish coating, for instance by brushing. It is also feasible to incorporate the activators and reducing agents into the foils directly.
  • the soft cushion linings prepared according to the invention on dentures are durable and do not separate Suitable activators accord-.
  • the present invention is further illustrated by the folin examp es i hout be ng re ict d the et Br nd .1 a V. 15 grams of polymethyl methacrylate and 0.015 gram of benzoyl peroxide are soaked with cc. of monomeric methyl methacrylate wherein 0.015 gram of the'morphqline salt of o-ethylene benzene sulfinic acid are dissolved and left standing in a covered vessel to form a dough.
  • the dough thus obtained is packed into a conventional ental a k a d are-s ped nd pr ssu h als ee f cel phan te pos d e een t e u es of he ask an he mat ria il e flask is op ned and a suflicient portion of the dough of monomeric and polymeric methyl m thac y at i remo ed t pe mit the ppl cation f a foi m de f om a copolyme of 49% fbu adi ne d 60% of m thyl met aa y te.
  • a denture'removed which is provided on the tissue side with a soft and nonhardeninglining that is attached to the denture by a proper chemical union and distinguished by high tensile strength and excellent stability to mouth fluids;
  • Example 2 terial to be applied thereto.
  • a mixture is prepared from 4 grams of a copolymer consisting of 6% of aerylonitrile and 94% of methyl methacrylate, 0.24 gram of benzoyl peroxide with 2 grams of monomeric methyl methacrylate and 0.1 gram of dimethylrp-toluidine.
  • the mixture is brushed to an appropriately sized foil of a copolymer of 35% of butadiene and 65% of methyl methacrylate stabilized as described in Example 1 and the foil thus coated is slightly heated above a flame and placed in position on the denture with the application of pressure.
  • the flask is closed and left standing under pressure for about 20 minutes.
  • the flask is then opened and a denture removed which is provided on the tissue side with a strongly adhering soft and non-hardeninglin ing which is distinguished by excellent t'ensilestrength and stability to mouth fluids.
  • Example 3 Foils of a copolymer eonsisting of 30% of butadiene, 60% of methylmethacrylate, and 10% of butyl acrylate, which is stabilized with the reaction product of p-cresol and formaldehyde, is placed into a denture flask.
  • the side of the foil which does not face the plaster of Paris is coated with tertiary butyl hydroperoxide and the flask is packed with a dough of grams of a copolymer consisting of 99% of methyl methacrylate and 1% of ethyl acrylate and 5 grams of monomeric methyl methacrylate,
  • An artificial denture comprising a hard, artificial base material and a soft cushion lining integrally attached to'the tissue side of said base material, said lining consisting essentially of a copolymer of (1) a member of the group consisting 'sr' o1 n'1eri'zab1e vinyl anddivinyl compounds and (2) hutadiene.
  • An artificial'denture comprising a hard, artificial base material and a soft cushion lining integrally attached to the tissue si e of sai b se ma er al, said linin consisting essentially of a-copolyrner of (1), an acrylate and (2) butadiene.
  • a process of preparing artificial dentures having soft cushion linings which comprises applying, to the tissue side of a hard, artificial base material, a soft cushion lining consisting of a copolymer of (1) a member of the group consisting of polymerizable vinyl and divinyl compounds and (2) butadiene by means of a polymerizable composition comprising (1) a methacrylate polymer, (2) a polymerizable liquid, ethylenically unsaturated monomeric compound, and (3) a polymerization catalyst, and hardening by polymerization reaction to produce a proper chemical union between the two layers.
  • a process of preparing an artificial denture having a soft cushion lining comprising the steps of packing'an acrylic resin into one partof a two part denture mold, placing over said resin 8. thin sheet of a mixture of (1) a' polymer of methyl methacrylate, (2) a polymerizable liquid monomeric compound selected from the group consisting of esters of acrylic acid and methacrylieacid, and (3) a polymerization catalyst, placing over said sheet at'the open face of the mold a soft cushion lining eon sisting essentially of a copolymer of acrylates and 'bfuta diene, closing the mold to shape the'acrylic resin and the lining and hardening the dough by the polymerization reaction to produce a proper chemical union between the two layers.

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  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Plastic & Reconstructive Surgery (AREA)
  • Dentistry (AREA)
  • Dental Preparations (AREA)
  • Dental Prosthetics (AREA)
US432605A 1953-05-29 1954-05-26 Artificial dentures and process of preparing Expired - Lifetime US2874467A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE334825X 1953-05-29

Publications (1)

Publication Number Publication Date
US2874467A true US2874467A (en) 1959-02-24

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Family Applications (1)

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US432605A Expired - Lifetime US2874467A (en) 1953-05-29 1954-05-26 Artificial dentures and process of preparing

Country Status (4)

Country Link
US (1) US2874467A (de)
CH (1) CH334825A (de)
FR (1) FR1101417A (de)
GB (1) GB739988A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3012287A (en) * 1959-10-14 1961-12-12 H D Justi & Son Inc Method of molding composite polymerized articles
US3628988A (en) * 1967-08-16 1971-12-21 Ceskoslovenska Akademie Ved Method for providing artificial dentures with a soft hydrogel layer
US4270904A (en) * 1978-10-11 1981-06-02 Bogaert Jean Pierre Method for repairing dental prosthesis and similar

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4484894A (en) * 1980-09-03 1984-11-27 Eiichi Masuhara Sheet for lining denture base
DE3610316A1 (de) * 1985-03-29 1986-10-30 Four Brain K.K., Hiroshima Gebissbasis mit einer gummiartigen elastischen unterfutter- bzw. einlageschicht und verfahren zu seiner herstellung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2232515A (en) * 1939-07-04 1941-02-18 Du Pont Synthetic resin prepared by interpolymerizing a mixture of a methacrylic acid ester and a 1, 3-butadiene
US2268611A (en) * 1937-06-16 1942-01-06 Du Pont Process of laminating
US2551812A (en) * 1947-07-14 1951-05-08 Alex A Nelson Process of preparing an artificial denture
US2569767A (en) * 1946-05-27 1951-10-02 L D Caulk Company Dental material and method
US2678469A (en) * 1951-08-10 1954-05-18 Charles L Dimmer Materials especially suitable for use in fabricating prosthetic appliances and dentures fabricated therefrom

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2268611A (en) * 1937-06-16 1942-01-06 Du Pont Process of laminating
US2232515A (en) * 1939-07-04 1941-02-18 Du Pont Synthetic resin prepared by interpolymerizing a mixture of a methacrylic acid ester and a 1, 3-butadiene
US2569767A (en) * 1946-05-27 1951-10-02 L D Caulk Company Dental material and method
US2551812A (en) * 1947-07-14 1951-05-08 Alex A Nelson Process of preparing an artificial denture
US2678469A (en) * 1951-08-10 1954-05-18 Charles L Dimmer Materials especially suitable for use in fabricating prosthetic appliances and dentures fabricated therefrom

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3012287A (en) * 1959-10-14 1961-12-12 H D Justi & Son Inc Method of molding composite polymerized articles
US3628988A (en) * 1967-08-16 1971-12-21 Ceskoslovenska Akademie Ved Method for providing artificial dentures with a soft hydrogel layer
US4270904A (en) * 1978-10-11 1981-06-02 Bogaert Jean Pierre Method for repairing dental prosthesis and similar

Also Published As

Publication number Publication date
GB739988A (en) 1955-11-02
CH334825A (de) 1958-12-15
FR1101417A (fr) 1955-10-06

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