Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K6/00—Preparations for dentistry
  • A61K6/30—Compositions for temporarily or permanently fixing teeth or palates, e.g. primers for dental adhesives
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K6/00—Preparations for dentistry
  • A61K6/30—Compositions for temporarily or permanently fixing teeth or palates, e.g. primers for dental adhesives
  • A61K6/35—Preparations for stabilising dentures in the mouth

Definitions

• the invention relates to fixing cream compositions according to the preambles of claims 1 and 3 .
• Vaseline Since a fixing cream slowly dissolves in the mouth during use, on the one hand there is the possibility that components of the cream enter the body via the mucous membranes of the mouth and pharynx and, on the other hand, components reach the digestive tract with the saliva and the food and may subsequently become distributed throughout the body.
• the basic components of Vaseline and mineral oil are not completely harmless according to the most recent results of research. Vaseline, for example, appears to promote blastomycosis conditions in newborn babies. Consequently, negative effects in adults cannot be excluded. Caution appears to be demanded particularly in the regular use of mineral oils on mucous membranes. Therefore, a replacement for mineral oils and mineral fats would be desirable.
• the contents and the quantitative relationships determine the properties of a fixing cream.
• the properties include, for example, the adhesion strength, the adhesion duration, the wearing comfort, the taste, the consistency, the stability, etcetera.
• a given proportion of Zn 2+ compounds is added in commercial products on a mineral oil basis.
• the adhesion strength and the adhesion duration are positively influenced by the addition of zinc compounds according to document U.S. Pat. No. 4,758,630 and, consequently, the addition of zinc compounds is of great significance to the usability of the fixing cream.
• paraffins such as refined mineral oils and fats (Vaseline) are used in many commercial fixing creams. These are admixtures of saturated hydrocarbons having the general molecular formula C n H 2n+2 , this involving liquid products (oils) or greasy to solid products (fats) in accordance with the distillation degree.
• the mineral oil admixtures and fats which are used in cosmetics and medicine also consist of practically exclusively saturated hydrocarbons.
• the purity of the admixtures depends on the degree of refinement. The degree of refinement is high for cosmetic and medical use. It is thereby intended to be ensured that carcinogenically acting polycyclical aromatic hydrocarbons are removed from the admixture as completely as possible.
• Mineral oils and fats are often used as bases of skin creams, the effect thereof being graded differently in this instance.
• Acknowledged groups of experts are of the opinion that paraffins can prevent the natural regulation mechanisms of the human body. In particular, they can accumulate in the liver, kidney and lymph nodes. However, there is uncertainty as to whether the paraffins can penetrate the skin. It is generally assumed that paraffins do not penetrate the skin in the case of topical application and therefore there is also no risk from those substances.
• Cosmetic skin creams having oils and fats have been on the market for many years. In the case of use in fixing creams, however, there is an increased probability that paraffinic components will be absorbed directly by the body via the digestion.
• U.S. Pat. No. 5,561,177 discloses a fixing cream formulation which is produced on the basis of plant oils. Accordingly, oils which particularly contain triglycerides of saturated fatty acids can be successfully used. Those triglycerides further have carbon chains of medium length, that is to say, chains having 8 or 10 carbon atoms in the fatty acid radical, which do not correspond to the typical fatty acid range of plant oils and fats (C 12 -C 20 ). The use of oils which contain unsaturated fatty acids is not recommended. According to U.S. Pat. No. 5,561,177, oils which contain unsaturated fatty acid esters have the disadvantage that they become unstable at high temperatures or after being stored for a given time. Furthermore, fixing creams which contain such oils are less solid owing to the unsaturated double-bonds present, that is to say, too liquid to be used as a fixing cream.
• An object of the present invention is to formulate a fixing cream composition which has good adhesive strength and is stable in the long term. Furthermore, the fixing cream composition is intended to be based on predominantly natural and physiologically harmless base products. In particular, there is intended to be found a formulation which is also free from mineral oils and free from zinc-containing compounds or which may have good fixing cream properties with a low content of mineral oil and/or zinc. Another object is to produce a fixing cream which is improved in physiological terms and which is at least equivalent in terms of its stability properties and adhesion properties, in particular with regard to the adhesion duration and the adhesion strength, in comparison with commercial creams. Furthermore, a fixing cream which produces a pleasant sensation in the mouth is sought.
• the object is achieved in a first construction with a fixing cream composition according to claim 1 in that the composition of a fixing cream which contains
• a) at least one oil or fat, preferably of a plant type, b) at least one water-soluble polymer selected from the group of cellulose derivatives and c) at least one alkyl vinyl ether/maleic acid anhydride copolymer, is characterised in that d) at least trihydroxystearin is contained therein.
• the object is achieved in a second construction in that the composition of a fixing cream which
• fatty acid content (the term fatty acid content being intended to refer below to the fatty acid bound as an ester) of the plant oil and/or fat contained consists of at least 20% by weight of unsaturated fatty acids.
• the composition according to the invention has the advantage that it comprises physiologically completely harmless components and is therefore also harmless when used for a relatively long time. Surprisingly, it was possible to find a composition which ensures very good and long-lasting adhesion in spite of a high proportion of unsaturated fatty acids. Good storage stability was also able to be achieved.
• composition of the fixing cream contains additional substances selected from the group consisting of phosphoglycerides, trihydroxystearin and polyethylene glycols.
• the object is achieved in a third construction with a fixing cream composition according to claim 3 in that the composition of a fixing cream which contains a) at least one oil or fat, preferably of the plant type, b) at least one water-soluble polymer selected from the group of cellulose derivatives and c) at least one alkyl vinyl ether/maleic acid anhydride copolymer, is characterised in that d) at least one polyethylene glycol is contained therein.
• composition of the fixing cream to contain at least one other substance selected from the group consisting of silicon dioxide, phosphoglycerides and trihydroxystearin.
• plant oils and fats are obtained from the seeds or fruits of oily plants.
• plant oils and fats are esters of glycerin with fatty acids, often with three fatty acids, so-called triglycerides.
• plant oils are regularly taken up by humans with foodstuffs and are physiologically completely harmless in the quantities which generally occur in the food.
• olive oil is preferably used because it results in a particularly physiologically tolerable fixing cream which is accepted in terms of taste, with the addition of zinc compounds simultaneously being dispensed with.
• refined olive oil has a relatively neutral taste, is readily available and is generally known to be healthy and digestible.
• a particular advantage of olive oil is also that it has an antiseptic and antibacterial effect. Tests have shown that, surprisingly, olive oil substantially inhibits the growth of organisms (bacteria, fungi) between the gums and the prosthesis. In particular, it was also possible to establish that the fungus Candida albicans can be inhibited by means of the fixing cream enriched with olive oil.
• the fixing cream according to the invention is distinguished by a composition which is harmless to health and which is based on plant oils and/or fats, in particular olive oil.
• olive oil may equally be used in the partially refined and the unrefined state.
• Cold-pressed olive oil and olive oil produced in a protective manner without any excessive temperature effect from a first pressing is advantageously used (that is to say, native extra virgin olive oil).
• trihydroxystearin and polyethylene glycol also result in stable fixing cream compositions. These substances provide good results both for creams on the basis of plant oils and for creams on the basis of mineral oils.
• additives are expediently selected from the group of antioxidants, flavourings, colourings, stabilisers, thickeners, emulsifiers and admixtures thereof.
• a substance may belong to a plurality of effective groups, or have a plurality of effects.
• the stabilisers act in an emulsifying, thickening manner and prevent the components from becoming separated.
• they are selected from the group containing silicon dioxide, trihydroxystearin, phosphoglycerides and polyethylene glycols. These substances have complex effect mechanisms and can influence each other—in accordance with our experiences—synergistically.
• the stability of a fixing cream is significant during storage and keeping and for the duration of use. During storage and keeping, moisture, temperature and pressure are generally relatively constant. In the course of use, however, oral saliva, food and changing pressure and temperature conditions further act on the fixing cream. Owing to this changing requirement, it may be advantageous to add different stabiliser substances which in total in the case of the different environmental influences improve and particularly stabilise the fixing cream properties.
• Thickeners are used as stabilisers. Thickeners which are also referred to as thickening stabilisers are preferably added in a quantity of from 0.001 to 3% by weight in relation to the total quantity of the composition.
• the use of silicon dioxide is expedient in a quantity of from 0.001 to 5% by weight, preferably from 0.1 to 4% by weight and more preferably from 0.5 to 3% by weight in relation to the total quantity of the composition.
• Particular advantages are involved in the use of silicon dioxide in combination in a cream on the basis of plant oil and/or fat. It is advantageous to use trihydroxystearin and/or phosphoglycerides such as, for example, lecithins.
• Trihydroxystearin is advantageously used in a quantity of from 0.001 to 2.5% by weight in relation to the total quantity of the composition and has an emulsifying and thickening effect.
• Polyethylene glycols are advantageously added in a quantity of from 0.001 to 15% by weight, preferably from 3 to 12% by weight and more preferably from 5 to 9% by weight in relation to the total quantity of the composition.
• polyethylene glycols having a molar mass of from 100,000 to 7,000,000 g/mol, in particular from 200,000 to 400,000 g/mol.
• Phosphoglycerides are advantageously used in a quantity of from 0.001 to 3% by weight in relation to the total quantity of the composition and act in an emulsifying and softening manner.
• phosphoglycerides such as, for example, lecithin and trihydroxystearin
• the total quantity of stabiliser additive can surprisingly be reduced.
• phosphoglycerides and trihydroxystearin are present in combination, phosphoglycerides are advantageously used in a quantity of from 0.001 to 3% by weight, more preferably in a quantity of from 0.001 to 2% by weight, particularly preferably in a quantity of from 0.01 to 1% by weight, and trihydroxystearin in a quantity of from 0.001 to 2.5% by weight, particularly preferably in a quantity of from 0.001 to 1% by weight, and very particularly preferably in a quantity of from 0.01 to 0.5% by weight in relation to the total quantity of the composition.
• Phosphoglycerides in particular lecithin, more particularly soya lecithin, appear to act in a predominantly stabilising manner on the fixing cream composition.
• Stearins in particular trihydroxystearin, further increase the adhesion strength of the cream.
• stabilisers from the group containing silicon dioxide, trihydroxystearin and phosphoglycerides other stabilisers or filling substances which act in a thickening manner can be used such as, for example, polyethylene glycol or talcum. Silicon dioxide or trihydroxystearin are preferred as stabilisers which act in a thickening manner.
• An expedient aspect is the combination of the two additives phosphoglycerides and trihydroxystearin, in particular lecithin and trihydroxystearin, with at least one other additive or both additives from the group comprising silicon dioxide and polyethylene glycol.
• a fixing cream composition in which at least the additives phosphoglyceride, silicon dioxide, trihydroxystearin and optionally polyethylene glycol are present in combination.
• Particularly suitable phosphoglycerides are lecithins.
• a fixing cream composition in which at least the additives lecithin, silicon dioxide, polyethylene glycol and trihydroxystearin are present in combination is very particularly preferable.
• the plant oil and/or fat is preferably contained in the fixing cream in a quantity of at least 25% by weight, preferably at least 30% by weight in relation to the total quantity of the composition and the fatty acid content of the plant oil or fat preferably consists of at least 20% by weight, preferably at least 30% by weight, more preferably a majority, more preferably at least 65% by weight and more preferably at least 80% by weight, of higher fatty acids having a chain length of from 16 to 18 C atoms.
• the fatty acids of an added plant oil and/or fat that is to say, the entirety of the fatty acids, generally consist of at least 20% by weight, preferably 40% by weight, more preferably 50% by weight, preferably 60% by weight, more preferably 70% by weight and most preferably at least 80% by weight of unsaturated fatty acids because this involves the advantage that the fixing cream is particularly tolerable for the prosthesis wearer during swallowing.
• the higher fatty acids mentioned advantageously comprise a proportion of from 50 to 90% by weight of oleic acid and a residual proportion of other fatty acids having a chain length of from 16 to 18 C atoms. More preferably, the higher fatty acids comprise a proportion of from 50 to 90% by weight of oleic acid, a proportion of from 5 to 25% by weight of palmitic acid and, optionally, a residual proportion of other fatty acids having a chain length of from 16 to 18 C atoms.
• the higher fatty acids more preferably comprise a proportion of from 50 to 90% by weight of oleic acid, a proportion of from 5 to 25% by weight of palmitic acid, a proportion of from 3 to 25% by weight of linoleic acid and, optionally, a residual proportion of other fatty acids having a chain length of from 16 to 18 C atoms.
• Oils such as olive oil and rapeseed oil are included by the groups mentioned.
• the plant oil and/or fat may expediently be provided in the unrefined or refined state.
• the plant oil and/or fat is advantageously present in a quantity of from 25 to optionally 45% by weight in relation to the total quantity of the composition.
• the quantity of plant oil or fat influences the consistency of the composition. If too little is added, the cream may take up a consistency which is dry in a granular manner.
• the addition of silicon dioxide, trihydroxystearin, phosphoglycerides and polyethylene glycols can counteract this.
• the cellulose derivatives are water-soluble polymers, preferably selected from the group consisting of methyl cellulose, carboxymethyl cellulose, sodium carboxymethyl cellulose, hydroxypropyl methyl cellulose and admixtures thereof. Carboxymethyl cellulose, in particular sodium carboxymethyl cellulose, is preferably used.
• the water-soluble polymer selected from the group of cellulose derivatives is present in a quantity of from 15 to 45% by weight in relation to the total quantity of the composition.
• the water-soluble polymer selected from the group of cellulose derivatives is preferably present in a quantity of from 20 to 40% by weight and more preferably in a quantity of from 25 to 38% by weight in relation to the total quantity of the composition.
• the alkyl vinyl ether/maleic acid anhydride copolymer is advantageously present partially as an acid, ester and/or salt.
• the cations of the salts are selected from the group consisting of calcium, potassium, sodium, magnesium, aluminium, zinc salts and admixtures thereof, in particular from the group consisting of Ca 2+ , K + , Na + , Mg 2+ , Al 3+ and/or Zn 2+ .
• a methyl vinyl ether/maleic acid anhydride copolymer is used as the alkyl vinyl ether/maleic acid anhydride copolymer.
• the methyl vinyl ether/maleic acid anhydride copolymer is present, for example, as a salt, ester and/or acid, in a quantity of from 20 to 45% by weight in relation to the total quantity of the composition.
• the methyl vinyl ether/maleic acid anhydride copolymer is present, for example, as a salt and/or acid in a quantity of from 25 to 45% by weight and preferably from 25 to 40% by weight and more preferably from 28 to 40% by weight in relation to the total quantity of the composition.
• Zinc compounds are advantageously not present; that is to say, addition of zinc compounds is advantageously dispensed with.
• the zinc content should be limited to an upper limit of a maximum of 1% by weight. That is to say that zinc may be contained in a quantity of up to 1% by weight in relation to the total quantity of the composition.
• the zinc content should advantageously be below an upper limit of 1% by weight, preferably of 0.5% by weight, more preferably of 0.1% by weight and more preferably of 0.06% by weight in relation to the total quantity of the composition, respectively.
• Zinc compounds having a lower limit of at least 0.001% by weight, preferably at least 0.01% by weight, more preferably at least 0.02% by weight, more preferably at least 0.03% by weight in relation to the total quantity of the composition are optionally present, respectively.
• the upper limit and lower limit may be freely combined.
• the zinc quantity may be kept low.
• the lower limits result on the basis of a measurable effect (that is to say, influence of the adhesion properties) or a desired effective strength as a result of the zinc content.
• Fixing creams having very good wearing properties and long-term stability values are particularly achieved when the above-mentioned oil or fat content, in particular of olive oil, is complied with.
• the preferred properties can be adjusted by using and optimising the stabilisers described.
• additives such as, for example, flavourings, antioxidants and colourings, are present in total in a quantity of a maximum of 10% by weight, preferably a maximum of 2% by weight and particularly preferably a maximum of 1% by weight in relation to the total quantity of the composition. With regard to the physiological harmlessness, the addition quantity of additives is kept as low as possible.
• the invention is explained below with reference to examples.
• the examples set out compositions which ensure good adhesion strength and adhesion duration, in particular also under reduced pressure conditions.
• the percentages are rounded to two places after the decimal point.
• Component % by weight Olive oil 40.35 Alkyl vinyl ether/maleic acid anhydride 30.26 copolymer Carboxymethyl cellulose 27.24 ZnO paste 2) 0.10 Trihydroxystearin 2.02 Aromatic additive 0.03 1) commercially available, 2) the paste consists of 50% by weight of oil (for example, olive oil) and 50% by weight of zinc oxide (ZnO), consequently approximately 0.04% by weight of zinc is added in the form of the ZnO paste.
• oil for example, olive oil
• ZnO zinc oxide
• the fixing cream according to example 1 has good adhesion strength which lasts at least 12 hours.
• the fixing cream leaves behind a fresh taste and a good, pleasantly silky sensation in the mouth.
• Component % by weight Olive oil 1) 31.19 Alkyl vinyl ether/maleic acid anhydride 32.22 copolymer Carboxymethyl cellulose 36.38 ZnO paste 2) 0.16 Trihydroxystearin 0.03 Lecithin 0.02 Aromatic additive 3) 0.00 1) commercially available, 2) the paste consists of 50% by weight of oil (for example, olive oil) and 50% by weight of zinc oxide (ZnO), consequently approximately 0.064% by weight of zinc is added in the form of the ZnO paste, 3) the added quantity is below measurement accuracy, in particular below 0.01% by weight.
• oil for example, olive oil
• ZnO zinc oxide
• the fixing cream according to example 2 has good adhesion strength which lasts at least 12 hours.
• the fixing cream leaves behind a fresh taste and a good, pleasantly silky sensation in the mouth.
• Component % by weight Olive oil 1) 36.99 Alkyl vinyl ether/maleic acid anhydride 37.51 copolymer Carboxymethyl cellulose 24.91 ZnO paste 2) 0.09 Trihydroxystearin 0.45 Lecithin 0.05 Aromatic additive 3) 0.00 1) commercially available, 2) the paste consists of 50% by weight of oil (for example, olive oil) and 50% by weight of zinc oxide (ZnO), consequently approximately 0.036% by weight of zinc is added in the form of the ZnO paste, 3) the added quantity is below measurement accuracy, in particular below 0.01% by weight.
• oil for example, olive oil
• ZnO zinc oxide
• the fixing cream according to example 3 has good adhesion strength which lasts at least 12 hours.
• the fixing cream leaves behind a fresh taste and a good, pleasantly silky sensation in the mouth.
• This fixing cream further has good long-term stability over months and is consequently storable.
• Component % by weight Olive oil 1) 38.6 Alkyl vinyl ether/maleic acid anhydride 33 copolymer Carboxymethyl cellulose 20 Silicon dioxide 0.8 Polyethylene glycol 7 Trihydroxystearin 0.4 Lecithin 2) 0.2 Aromatic additive 3) — 1) commercially available, 2) soya lecithin, 3) optional.
• the fixing cream according to example 4 has good adhesion strength which lasts at least 12 hours.
• the fixing cream leaves behind a fresh taste and a good, pleasantly silky sensation in the mouth.
• This fixing cream further also remains stable under reduced pressure conditions, as exist in aircraft freight compartments and residential areas at high elevations.
• Component % by weight Olive oil 1) 38.58 Alkyl vinyl ether/maleic acid anhydride 33.00 copolymer Carboxymethyl cellulose 27.00 Trihydroxystearin 0.40 Silicon dioxide 2) 0.80 Lecithin 3) 0.20 Aromas 3) 0.02 1) commercially available, 2) for example, pyrogenic silicon dioxide, 3) soya lecithin.
• the fixing cream according to example 5 has good adhesion strength which lasts at least 12 hours.
• the fixing cream leaves behind a fresh taste and a good, pleasantly silky sensation in the mouth.
• a plant oil and/or fat is advantageously present in a quantity of from 25 to 60% by weight, preferably from 30 to 45% by weight in relation to the total quantity of the composition
• the water-soluble polymer selected from the group of cellulose derivatives is present in a quantity of from 10 to 40% by weight, preferably from 15 to 38% by weight, more preferably from 15 to 25% by weight in relation to the total quantity of the composition
• the alkyl vinyl ether/maleic acid anhydride copolymer is present in a quantity of from 25 to 45% by weight and preferably from 28 to 40% by weight in relation to the total quantity of the composition
• the silicon dioxide is present in a quantity of from 0 to 2.5% by weight and preferably from 0 to 1.5% by weight in relation to the total quantity of the composition
• the polyethylene glycol is present in a quantity of from 0 to 15% by weight and preferably from 0 to 10% by weight in relation to the total quantity of the composition
• the trihydroxystearin is present in a quantity of from 0 to 2.
• the trihydroxystearin is present in combination with the phosphoglyceride in a quantity of from 0 to 2.5% by weight and preferably from 0 to 1% by weight in relation to the total quantity of the composition. It was further established that the total quantity of the trihydroxystearin, silicon dioxide and phosphoglyceride contained in total should preferably not exceed the quantity of a maximum of 10% by weight, preferably a maximum of 5% by weight, more preferably a maximum of 4% by weight in relation to the total quantity of the composition.

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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)
• Cosmetics (AREA)
• Chemical & Material Sciences (AREA)
• Adhesives Or Adhesive Processes (AREA)
• Dental Preparations (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Organic Chemistry (AREA)
• Medicinal Preparation (AREA)

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• 2011
  • 2011-01-19 WO PCT/EP2011/000195 patent/WO2011088988A1/de active Application Filing
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