WO1993023018A1 - Compositions sous forme de film pour le traitement des parodontolyses et procede de fabrication - Google Patents
Compositions sous forme de film pour le traitement des parodontolyses et procede de fabrication Download PDFInfo
- Publication number
- WO1993023018A1 WO1993023018A1 PCT/FR1993/000484 FR9300484W WO9323018A1 WO 1993023018 A1 WO1993023018 A1 WO 1993023018A1 FR 9300484 W FR9300484 W FR 9300484W WO 9323018 A1 WO9323018 A1 WO 9323018A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- polymer
- active
- process according
- manufacturing process
- solution
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/0012—Galenical forms characterised by the site of application
- A61K9/0053—Mouth and digestive tract, i.e. intraoral and peroral administration
- A61K9/0063—Periodont
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/33—Heterocyclic compounds
- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/41—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with two or more ring hetero atoms, at least one of which being nitrogen, e.g. tetrazole
- A61K31/415—1,2-Diazoles
Definitions
- the invention relates to a method of manufacturing pharmaceutical compositions in the form of a flexible, plastic film, easily manipulated by the practitioner, for the local treatment of hollow lesions of living tissue, in particular periodontal pockets. It extends to new pharmaceutical compositions produced by implementing this process.
- compositions which combine a support or vector and an active principle with the aim of releasing the active principle over a determined period in a living site.
- the composition is inserted into the pocket formed so as to fill the latter and to release the active principle, which is chosen to have antimicrobial and / or anti-inflammatory properties.
- the composition obtained has a strong tendency to soften in the presence of - liquids biological, so that it proves difficult to handle and to put in place to fill the periodontal pockets which are often hemorrhagic or, in general, any hollow lesion of living tissue.
- collagen of animal origin, difficult to sterilize presents the risk of bringing into the treated lesions pathogenic germs which are very resistant and difficult to destroy.
- polymers from the family of polylactides and / or polygalactides which are currently used to manufacture elements that can be implanted in living tissue (surgical sutures, osteosynthesis products, etc.) because of their good biocompatibility. and their resorbable nature in the presence of these tissues (by slow degradation in lactic acid and / or glycolic acid).
- these polymers have never been used as a support for a pharmaceutical composition of the aforementioned type, essentially due to difficulties, firstly, in homogeneously incorporating an active principle therein, on the other hand, for the put in the form of flexible, plastic film, manipulable for the treatment of periodontal pockets or other hollow lesions.
- the present invention proposes to provide new pharmaceutical compositions intended for the local treatment of hollow lesions of living tissue, in particular periodontal pockets. Its objective is to combine the following advantages, making said compositions particularly well suited to the aforementioned application:
- an antimicrobial compound active in particular on anaerobic germs, or an anti-inflammatory compound, or a mixture of such compounds, in particular compound or mixture of compounds of the family of imidazoles, for example metronidazole .
- the solution is preferably prepared by dissolving, by dry weight, between 3 and 30% of imidazole compounds relative to said polymer, which can in particular consist of a polylactide or a polylactide / polyglycolig copolymer, of molecular weight between 40,000 and 150,000.
- the process can be carried out in this case using acetone as the common solvent and an aqueous liquid as the inert liquid.
- the concentration of polymer in acetone is advantageously between 5 and 85%.
- the hydrolysis kinetics of the polymer is a function of its molecular weight.
- the resorption in vivo is slower the higher the molecular weight of the polymer. It is thus possible, by an appropriate choice of this molecular weight, to control both the duration of absorption of the composition and the rate of release of the active principle which depends on it.
- the active solution before spraying the active solution on the liquid surface, it is possible to spray on this surface a solution, called primary, similar to the active solution but free of active principle, in order to make a polymeric undercoat, the active solution then being sprayed onto this undercoat.
- the loss of active principle is thus limited by precipitation or by dissolution in the underlying liquid medium.
- the composition obtained in the form of a film has better resistance, especially in the presence of biological liquids, which further facilitates its handling during its establishment.
- the active solution can be prepared only from a polylactide or polygalactide polymer or from a mixture of the two, the proportion of imidazole compounds then being advantageously, by dry weight, between 10% and 30% compared to said polymer.
- a minority proportion of a polymer from the same family of polylactides and / or polygalactides is added to the solution, of molecular weight lower than that of the polylactide and / or polygalactide polymer; this minority polymer can in particular be added in proportions comprised, by dry weight, between 1 and 30% relative to the majority polymer. Thanks to this additional polymer, faster release of the imidazole compound is obtained and it can be incorporated in a relatively lower proportion compared to the majority polymer, in particular between 3 and 15% expressed by dry weight.
- the active solution and, if necessary, the primary solution are sprayed onto the liquid surface can be carried out by successive passages of a spray nozzle until a film of total thickness between 10 and 800 micrometers is obtained. .
- the wet film produced can be recovered by spreading it over a sieve, in particular made of stainless steel, this film then being dried in a ventilated oven and cut to obtain the product in the presentation usable by the practitioner.
- the invention extends, as a new product, to a new pharmaceutical composition for the local treatment of hollow lesions of living tissues, in particular of periodontal pockets, in the form of a flexible, plastic, manipulable film, and comprising at least one support polymer of the family of polylactides and / or polygalactides, of molecular weight at least equal to 1000, and at least one active principle antimicrobial and / or anti-inflammatory from the imidazole family.
- the support polymer can be divided into two superimposed layers: a sublayer composed only of said polymer and an active layer composed of the same polymer in which the active ingredient (s) are incorporated.
- At least one other polymer can be mixed with the support polymer in a minority proportion, this other polymer being from the family of polylactides, polygalactides or polylactide / polyglycolic copolymers of lower molecular weight than that of the support polymer.
- FIG. 1 shows diagrammatically the installation used in Example 1 for manufacturing the films
- FIG. 2 is a diagram illustrating the kinetics of in vitro release of metronidazole from the two batches of films produced.
- Two batches of films are prepared by the process of the invention by means of the installation shown diagrammatically in FIG. 1.
- This installation comprises a container 1 containing the starting solution (primary solution or active solution).
- This solution is sucked into a conduit 2 equipped with a pump 3 to a spraying device 4 comprising several adjustable flow nozzles placed in rows.
- nozzles are arranged above a tank 5 containing a film of water with a thickness of between 1 and 10 cm (of the order of 5 cm in the example). The nozzles are positioned so that the solution is sprayed across the width of the tank.
- the film formed is guided by a cylinder 6 partially immersed in the liquid; he is then guided by another cylinder 7 and driven by rollers 8 and 9 whose speed of rotation is adjustable.
- the roller 8 is a roller made of a microporous material, which is connected to a vacuum pump system in order to ensure a pre-drying of the film.
- the film is then dried in a ventilated oven in a drying tunnel 10 traversed by a current of hot air.
- the dried film is collected on a roller 11 in order to be subsequently cut to the desired dimensions.
- the two batches of films prepared in this example are bilayer films comprising a polymer sublayer containing no active ingredient (obtained from a so-called primary solution) and an active layer containing the active ingredient (obtained from 'a so-called active solution).
- the polymer used is a poly DL lactide polymer with a molecular weight equal to approximately 100,000.
- the table below provides the compositions of the solutions for each of the two batches,
- each film is dried in a ventilated oven at + 40 ° C for 4 hours.
- the dry film having a thickness of 500 micrometers, is then cut into strips 5 cm long by 1 cm wide.
- metronidazole There is a release of about 25% of metronidazole in about twenty days.
- the metronidazole remaining in each strip (undissolved) will only be released in vivo after digestion of the polymer by enzymes present in living tissue.
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- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Medicinal Chemistry (AREA)
- Pharmacology & Pharmacy (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Nutrition Science (AREA)
- Physiology (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Medicinal Preparation (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP93910136A EP0641197A1 (fr) | 1992-05-20 | 1993-05-18 | Compositions sous forme de film pour le traitement des parodontolyses et procede de fabrication |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9206259A FR2691360B1 (fr) | 1992-05-20 | 1992-05-20 | Compositions pharmaceutiques destinees en particulier au traitement des poches parondontales et procede de fabrication. |
FR92/06259 | 1992-05-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1993023018A1 true WO1993023018A1 (fr) | 1993-11-25 |
Family
ID=9430063
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1993/000484 WO1993023018A1 (fr) | 1992-05-20 | 1993-05-18 | Compositions sous forme de film pour le traitement des parodontolyses et procede de fabrication |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0641197A1 (fr) |
AU (1) | AU4075993A (fr) |
FR (1) | FR2691360B1 (fr) |
WO (1) | WO1993023018A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2699076A1 (fr) * | 1992-12-11 | 1994-06-17 | Colgate Palmolive Co | Forme pharmaceutique et procédé pour délivrer un ingrédient actif à une poche parodontale. |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0233429A1 (fr) * | 1985-12-23 | 1987-08-26 | Pierre Fabre Medicament | Composition pharmaceutique contenant une association de collagène et d'un principe actif antiseptique et/ou anti-inflammatoire et son procédé de fabrication |
EP0241178A1 (fr) * | 1986-03-25 | 1987-10-14 | Rohto Pharmaceutical Co., Ltd. | Composition pharmaceutique pour le traitement des maladies périodontales |
EP0430474A1 (fr) * | 1989-11-17 | 1991-06-05 | The Procter & Gamble Company | Composition pharmaceutique pour le traitement des maladies périodontales à libération prolongée |
EP0447719A1 (fr) * | 1990-03-05 | 1991-09-25 | Minnesota Mining And Manufacturing Company | Dispositif de libération prolongée d'agents pharmacologiquement actifs dans l'oreille |
WO1992000718A1 (fr) * | 1990-07-03 | 1992-01-23 | Vipont Pharmaceutical, Inc. | Systemes d'administration intragingivale pour le traitement de maladies parodontales |
EP0481600A2 (fr) * | 1990-10-16 | 1992-04-22 | American Cyanamid Company | Matériaux utiles en médecine humaine et vétérinaire |
-
1992
- 1992-05-20 FR FR9206259A patent/FR2691360B1/fr not_active Expired - Lifetime
-
1993
- 1993-05-18 WO PCT/FR1993/000484 patent/WO1993023018A1/fr not_active Application Discontinuation
- 1993-05-18 EP EP93910136A patent/EP0641197A1/fr not_active Ceased
- 1993-05-18 AU AU40759/93A patent/AU4075993A/en not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0233429A1 (fr) * | 1985-12-23 | 1987-08-26 | Pierre Fabre Medicament | Composition pharmaceutique contenant une association de collagène et d'un principe actif antiseptique et/ou anti-inflammatoire et son procédé de fabrication |
EP0241178A1 (fr) * | 1986-03-25 | 1987-10-14 | Rohto Pharmaceutical Co., Ltd. | Composition pharmaceutique pour le traitement des maladies périodontales |
EP0430474A1 (fr) * | 1989-11-17 | 1991-06-05 | The Procter & Gamble Company | Composition pharmaceutique pour le traitement des maladies périodontales à libération prolongée |
EP0447719A1 (fr) * | 1990-03-05 | 1991-09-25 | Minnesota Mining And Manufacturing Company | Dispositif de libération prolongée d'agents pharmacologiquement actifs dans l'oreille |
WO1992000718A1 (fr) * | 1990-07-03 | 1992-01-23 | Vipont Pharmaceutical, Inc. | Systemes d'administration intragingivale pour le traitement de maladies parodontales |
EP0481600A2 (fr) * | 1990-10-16 | 1992-04-22 | American Cyanamid Company | Matériaux utiles en médecine humaine et vétérinaire |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2699076A1 (fr) * | 1992-12-11 | 1994-06-17 | Colgate Palmolive Co | Forme pharmaceutique et procédé pour délivrer un ingrédient actif à une poche parodontale. |
Also Published As
Publication number | Publication date |
---|---|
EP0641197A1 (fr) | 1995-03-08 |
FR2691360A1 (fr) | 1993-11-26 |
FR2691360B1 (fr) | 1995-06-30 |
AU4075993A (en) | 1993-12-13 |
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