WO2002030312A2 - Method for making prosthetic, in particular dental, elements and dispenser for composite material comprising fibre bundles - Google Patents
Method for making prosthetic, in particular dental, elements and dispenser for composite material comprising fibre bundles Download PDFInfo
- Publication number
- WO2002030312A2 WO2002030312A2 PCT/FR2001/003136 FR0103136W WO0230312A2 WO 2002030312 A2 WO2002030312 A2 WO 2002030312A2 FR 0103136 W FR0103136 W FR 0103136W WO 0230312 A2 WO0230312 A2 WO 0230312A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- filament
- ribbon
- fibers
- resin
- dispenser according
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H49/00—Unwinding or paying-out filamentary material; Supporting, storing or transporting packages from which filamentary material is to be withdrawn or paid-out
- B65H49/18—Methods or apparatus in which packages rotate
- B65H49/20—Package-supporting devices
- B65H49/205—Hand-held or portable dispensers
-
- 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
- A61C13/0003—Making bridge-work, inlays, implants or the like
Definitions
- the invention relates to a method of manufacturing prosthetic elements, in particular dental and a distributor of filament or ribbon of fiber composite material.
- these composite materials with a polymerizable resin matrix comprising mineral fillers of various shapes and sizes must be strong enough to withstand the forces which they support during masticatory function. This is why it is necessary to create a rigid frame on which the cosmetic composite materials are then applied and to which they adhere.
- This reinforcement which has a role of mechanical reinforcement is, for its part, made of composite materials, called fiber composite materials, which are, like cosmetic composite materials, made up of a polymerizable resin matrix but the charge of which is made up, not of particles of various shapes and sizes, but of fibers in the form of discontinuous or, better still, continuous filaments, braided, woven or unidirectional.
- fiber composite materials are used: - either in the form of woven or braided filaments, which are already pre-impregnated with unpolymerized polymerizable resin or which are embedded in the unpolymerized polymerizable resin at the time of their use , - Or in the form of plates composed of a superposition of layers of woven or non-woven fibers embedded in the non-polymerized polymerizable resin.
- these composite materials in the form of layers of fibers or superimposed layers of fibers do not allow the contour of the imprint of the prosthetic element to be obtained to be very precisely matched. Indeed, when using filaments consisting of a bundle of fibers substantially unidirectional, woven, braided or free, this bundle of fibers is deposited in layers on the imprint of the prosthetic element to be obtained, by crossing these layers for obtain the most complete recovery possible.
- fiber composite material plates made up of one or more thin layers of woven or nonwoven fibers impregnated with resin, the plate is placed, with the thickness that this implies, on the imprint of the prosthetic element to be obtained and is shaped by pressure and depression.
- the invention aims to overcome the drawbacks of the prior art by proposing a method of manufacturing prosthetic elements, in particular dental which makes it possible to cover very precisely, regularly, and to obtain a uniform thickness of the prosthetic element to get.
- the invention also provides a distributor of fiber composite material allowing, in particular, to implement this process.
- the invention provides a distributor of filament or ribbon of woven or nonwoven fibers, impregnated with a polymerizable resin by application of at least one stress and not polymerized, characterized in that it comprises: - a spool cylindrical pierced in its center with an orifice capable of receiving an axis of rotation, - a filament or a ribbon of fibers impregnated with a polymerizable resin by application of at least one stress and not polymerized, wound at the periphery of the coil , and - a device capable of receiving the reel provided with its winding of filament or ribbon comprising:
- a first external half-shell comprising, on its periphery (6), an opening allowing the passage of the filament or ribbon and pierced in its center with an orifice capable of receiving an axis of rotation
- a second internal half-shell able to engage tightly in the external half-shell comprising, on its periphery, an opening allowing the passage of the filament or ribbon when placed facing the opening, the half-shell being moreover pierced in its center an orifice capable of receiving an axis of rotation, - an axis of rotation capable of engaging in the orifices and forming an axis of rotation for the reel provided with its winding of filament or ribbon and comprising closing means and / or opening and / or tightening for the half-shells, the reel provided with the winding of the filament or of the ribbon being intended to be placed, on the axis of rotation, between the two half-shells and fitted one into the other.
- the dispenser according to the invention further comprises a hollow end-piece for guiding the filament or ribbon, placed facing the opening of the external half-shell and connected to this external half-shell.
- the dispenser according to the invention further comprises a second hollow end piece forming a narrowing neck for guiding and / or bringing the desired section of the filament or ribbon.
- the dispenser according to the invention is in a single package and ready for use.
- the dispenser according to the invention may also include, in a first package the coil provided with its filament or ribbon winding, and in a second package, the device assembled and removable, the coil provided with its filament or ribbon winding being placed before use in the device.
- the device is made of a material opaque to light and not adhering to the resin and the coil is made of a material not adhering to the resin.
- the reel provided with its filament or ribbon winding is moreover packaged in a light opaque packaging.
- the coil comprises on its periphery, a recessed part capable of receiving the filament or ribbon.
- the fibers of the filament or ribbon are selected from the group consisting of glass fibers, quartz fibers, silica fibers, aramid fibers, kevlar fibers, fibers polyethylene, carbon fibers and mixtures thereof.
- the fibers are glass fibers based on zirconium oxide.
- the glass constituting the fibers contains between 16.8% and 17.1% by weight of zirconium oxide relative to the total weight of the glass.
- the polymerizable resin impregnating the fibers of the filament or ribbon is preferably a polymerizable resin by application of heat and / or light.
- the polymerizable resin is either Bis-GMA resin or a di-urethane resin.
- the dispenser according to the invention is further characterized in that the filament or the ribbon ultimately contains between 40% and 80% by volume of fibers relative to the total volume of the fibers and of the polymerizable resin.
- the invention also proposes a method for manufacturing prosthetic elements, in particular dental, characterized in that it comprises the steps of: a) winding a filament or a ribbon of woven or non-woven fibers impregnated with a polymerizable resin by application of at least one stress and not polymerized, on the imprint of the prosthetic element to be obtained, until obtaining the desired shape and thickness, b) polymerization of the resin by application of. the appropriate constraint (s), c) separation of the prosthetic element obtained in step b) and of the impression.
- FIG. 1 represents a perspective view of the composite material dispenser of the invention according to a first embodiment
- FIG. 2 represents an exploded perspective view of the device of the invention shown in FIG. 1,
- FIG. 3 shows a sectional view of the composite material dispenser of Figure 1 along the plane PP passing through the axis XX '
- - Figure 4A shows a partial perspective view of a first variant of the distributor according to the first embodiment of the invention
- FIG. 4B represents a partial perspective view of a second variant of the dispenser according to the first embodiment of the invention
- FIG. 6 schematically represents an imprint of the prosthetic element to be obtained
- FIG. 7 shows schematically a first mode of implementation of the method of the invention
- FIG. 8 shows schematically a device for the implementation of the method of the invention.
- the process of the invention finds particular application in the manufacture of reinforcing copings in fiber composite materials for the manufacture of crowns or bridges.
- the fiber composite materials used in the invention are the composite materials that are used in dentistry, that is to say comprising, as reinforcement, glass fibers, quartz fibers, silica fibers, aramid fibers, kevlar fibers, polymethylene fibers, carbon fibers, or mixtures thereof.
- composite materials comprising glass fibers will be used because they have the advantage, in particular compared to carbon fibers, of having a color closer to the color of the natural tooth.
- the glass fibers are off-white in color, which makes them particularly suitable for dental use.
- the particularly preferred glass fibers for the manufacture of prosthetic elements, in particular dental are glass fibers made from a glass based on zirconium oxide. Indeed, such glass fibers are radiopaque, that is to say visible on a dental radiography.
- a preferred glass is a glass whose starting materials include zirconium oxide, the zirconium oxide being melted at the same time as the other components of the glass during the manufacture of the glass which is then itself transformed into fibers .
- the fibers preferably used in the invention are fibers produced from a glass containing between 16.8% and 17.1% by weight of zirconium oxide relative to the total weight of the glass. These glass fibers, thanks to their zirconium oxide content, are particularly suitable for dental use.
- saliva makes the oral cavity a more corrosive environment than sea air, which is the reference environment for corrosion resistance tests of industrial products.
- the salivary pH can be alternately acidic or basic. Any object in permanent contact with saliva is in a 100% humid environment, at a temperature of 37 ° C, and is subjected to a phenomenon of corrosion by hydrolysis.
- this medium contains aerobic bacteria and anaerobes capable of secreting all kinds of alkane, ketone, and other substances which are also corrosion agents.
- Glass fibers containing zirconium oxide are preferred in the invention because they have a high resistance to acid and alkaline agents due to their proportions of zirconium oxide. This resistance is of the order of 10 times that of a glass fiber that does not contain zirconium oxide. They also have better resistance to hydrolysis in a humid environment, and moreover better mechanical properties, in particular better resistance to fatigue, which makes them particularly suitable for use in the manufacture of dental reinforcement.
- these glass fibers enriched with zirconium oxide have an average diameter of 14 to 20 ⁇ m and have the property of disintegrating into microparticles but while keeping a size greater than 3 ⁇ m when they are ground by machining or attacked by hydrolysis, which makes them non-inhalable (not breathable). This is very important for a material intended to remain in the mouth for years and also for the health of professionals who have to work, machine and grind the parts obtained with the composite material of the invention.
- Particularly suitable fibers are those sold under the brand name "Cem-FIL ® Fibers" by the company VETROTEX, a subsidiary of the company Saint-Gobain.
- the resin used for the composite material used in the invention is any resin curable by the application of at least one stress.
- this constraint will be heat or light, whether visible, infrared or UV.
- a suitable resin in the context of the composite material of the invention is chosen from epoxy, polyester and vinylester resins which are thermosetting resins or polymethacrylate or diurethane resins which are photo- and thermosetting resins or derivatives thereof. this.
- the resin preferably has a viscosity of between 400 and 800 centipoise.
- the viscosity can be adjusted by adding fillers such as micro- or macro-particles of quartz, barium glass, ceramic or others, of sizes between 0.3 and 10 ⁇ m.
- the elastic modulus or Young's modulus of this resin will be between 30 Gpa and l50 Gpa.
- a preferred resin for the manufacture of dental prostheses is a Bis-GMA resin. This is used in dentistry for the prophylactic sealing of wells and cracks and is referred to as "flowable composite". It is sold under the "HELIOSEAL F” brands of Vivadent or
- This resin has the same chemical nature as the resin of the cosmetic composite material which will be attached to it. This allows chemical bonding between them, that is to say a fusion of the two materials, which eliminates the problems of decoalescence between these materials.
- the second reason is that the Bis-GMA resin shrinks when it sets (hardening). The larger the volume of resin, the greater the shrinkage.
- a bridge is made up: - firstly, of a reinforcement yoke made up a) of two pillar elements noted 19, 19 'in Figure 7, resting on machined teeth noted 21, 21' in Figure 7, present on each side of a toothless sector, b) of a part, denoted 20 in FIG. 7, called pontic, replacing one or more absent teeth, and - secondly, of a part 22 of cosmetic composite material applied to the aforementioned reinforcement, this last part constituting the anatomy and the color of the abutment teeth and of missing tooth (s) to be reconstituted.
- the method of manufacturing a bridge consists in first cutting the abutment teeth 21 and 21 'in a substantially conical shape in order to be able to insert and remove the prosthetic element to be obtained. More precisely, a plaster impression as shown in FIG. 6, cut abutment teeth is produced. This imprint, as shown in Figure 6 is the exact replica of the tooth cut in the mouth noted 17 in Figure 6, extended by a metal part 18 allowing the manipulation of the plaster imprint.
- plaster impression 17 will also be called abutment tooth 21 and / or 21 '.
- the reinforcement or reinforcement 19, 19 ′, 20 it is first necessary to cover each cut tooth 21 and 21 ′, or more precisely their imprints also denoted 21 and 21 ′, with a yoke 19, 19 ′, the screeds 19, 19 'then being connected to each other by the bridge or pontic deck.
- the production of the screeds 19, 19' is complex: the imprints 21 and 21 'must be entirely wrapped with the fiber composite material, the thickness of the . fiber composite material should be low at the collar to increase at the top, and the amount of fibers making up the covering should be constant.
- the reinforcement screed is then hardened by polymerization of the resin constituting the fiber composite material.
- pellets which consist of superimposed layers of glass fibers impregnated with polymerizable and unpolymerized resin superimposed on each other, which are applied by pressing on the trimmed teeth.
- This system has at least two drawbacks: there remains a hiatus at the neck of the teeth because of the viscosity of the resin and, on the other hand, the thickness of the reinforcement obtained is irregular because the fibers of the tissue layers in the form of pellets move apart when pressed on the cut teeth.
- the reinforcement screed does not have constant mechanical properties over its entire surface.
- the process for manufacturing prosthetic elements, in particular dental and more particularly a reinforcing cap for bridge or crown is, as shown in FIG. 7, based on the principle of use of a thread or a filament or a ribbon of woven or non-woven fibers which is wound around each of the abutment teeth 21, 21 '(or more exactly around their exact plaster replica), the fibers being impregnated with a polymerizable resin by application of at least one stress and not polymerized.
- This is truly a winding around the imprint of the prosthetic element to be obtained and not a simple covering. This winding can be obtained for example as shown in FIG.
- the prosthetic element to be obtained is a crown
- the prosthetic element is then separated from the impression and the prosthetic element, thus separated from its impression, is placed on the tooth cut in the mouth.
- the procedure is after curing the resin of the composite material closing the copings (19, 19 ′), as follows.
- the yokes 19, 19 ′ are then connected together by the thicker reinforcement 20 of the pontic.
- This reinforcement is produced, as shown in FIG. 7, by winding the filament or ribbon 1 on a preform placed between the two yokes 19, 19 '. This winding is carried out by gluing one end of the filament or ribbon to a point on the first yoke and winding on the preform 27 placed between the two yokes 19 and 19 '.
- the filament or ribbon will be cut and the assembly will be hardened by polymerization of the resin.
- we separate the composite material bridge obtained and the plaster impression after which we position this bridge in the mouth, as desired.
- the fiber composite materials are sticky and difficult to handle due to the presence of the non-polymerized resin.
- the invention proposes a dispenser of such a composite material, which makes it possible to wrap the composite material around the imprint of the prosthetic element to be obtained, without touching the composite material impregnated with sticky resin itself. even.
- a dispenser of such a composite material which makes it possible to wrap the composite material around the imprint of the prosthetic element to be obtained, without touching the composite material impregnated with sticky resin itself. even.
- screeds having a constant fiber thickness will be obtained throughout the piece because the fibers will not spread under the effect of the pressure exerted during handling of the composite material.
- a first embodiment of the composite material dispenser of the invention is as shown in Figures 1 to 4B.
- this distributor consists of a device 14, consisting, as shown in Figures 2 and 3, of a first external half-shell 5 comprising on its periphery 6 an opening 7 and a second internal half-shell 9 also comprising on its periphery 6 ′ an opening 10.
- a device 14 consisting, as shown in Figures 2 and 3, of a first external half-shell 5 comprising on its periphery 6 an opening 7 and a second internal half-shell 9 also comprising on its periphery 6 ′ an opening 10.
- the half-shell 9 is intended to fit into the half-shell 5 to form a closed package.
- the half-shell 5 and the half-shell 9 have two orifices placed in their center, noted 8 and 11, respectively.
- a rotation axis 4 is intended to pass through the half-shells 5 and 9 through the orifices 8 and 11 so as to allow the rotation of the half-shell 9 relative to the half-shell 5, along the axis X-X ', so as either to close the device 14 in a sealed manner, or to release the opening formed by the openings 7 and 10, opening through which the filament or ribbon 1 will be unwound.
- This device 14 is intended to receive a coil 2 also pierced in its center to allow the passage of the axis of rotation 4 and thus rotate around this axis along the axis XX '.
- the coil 2 has at its periphery 34 a winding of the filament or ribbon 1 of impregnated fibers which can be polymerized by applying at least one stress and which are not polymerized.
- the device 14 when ready for use, contains the coil 2 with its winding of filament or ribbon 1 of composite material and the filament or ribbon 1 comes out through the opening formed by the openings 7 and 10 of the half-shells 5 and 9.
- the axis of rotation 4 is provided with a threaded part coming out of the device 14 and with a nut to allow closing or l opening of the device 14 as well as ensuring the cohesion of the dispenser of the invention.
- the axis of rotation 4 may further comprise, at each end in contact with the half-shells 5 and 9, the springs 4 '.
- the filament or ribbon 1 of fibers impregnated with an unpolymerized polymerizable resin can be wound on the periphery and on this periphery 34 of the reel 2.
- the reel 2 will comprise a hollow part 35 hollowed in its periphery 34 forming housing for the wound ribbon or filament 1.
- the distributor denoted 14a, 14b of the invention preferably comprises a hollow cylindrical endpiece 12, 12a allowing the guiding of the filament or ribbon 1 out of the distributor 14a, 14b.
- This hollow end-piece is placed on the device 14a, 14b facing the opening 7 of the external half-shell, 5a, 5b and linked to the latter.
- this hollow nozzle 12 When the dispenser of the invention is delivered ready for use, that is to say in a single package, this hollow nozzle 12 will have a fully closed envelope surface, as shown in FIG. 4A, and the ribbon or filament will come out of the hollow tip 12.
- the end piece 12a advantageously comprises, as shown in FIG. 4B, a slot 21 along its length allowing the placement of the filament or ribbon 1 in the end piece 12a.
- the device 14a and 14b advantageously further comprises a second hollow tip 13, 13a extending the end piece 12, 12a and forming a narrowing neck and allowing the guide and / or the desired section of the filament or ribbon 1.
- the second end piece 13 may only cover externally or internally only a portion of the hollow end piece 12.
- the end piece 12a has a groove 21, preferably the endpiece 13a will cover the entire endpiece 12a to avoid oxidation of the resin impregnating the fibers constituting the filament or ribbon 1. This will also make it possible to avoid any untimely blocking or any untimely exit of the filament or ribbon 1 through the groove 21.
- the dispenser 14, 14a, 14b can be delivered, ready for use, in a single package or can be delivered in separate packages, the first package containing the two half-shells 5, 5a, 5b and 9 as well as the axis of rotation 4 and the second packaging containing the coil 2 provided with its winding of filament or ribbon 1.
- Certain resins being photopolymerizable in order to avoid a prepolymerization of this re sine, the device 14, 14a, 14b, that is to say the two half-shells 5, 5a, 5b and 9, the end pieces 12, 12a and 13, 13a are preferably made of a material opaque to light.
- the packaging of this coil is preferably made of a material opaque to light.
- the coil 2, the two half-shells 5, 5a, 5b and 9 as well as the end pieces 12, 12a and 13, 13a will be made of a material which is not adherent to the resin.
- FIG. 5 Another distributor of composite material according to the invention is described in FIG. 5.
- this distributor 14 ′ comprises the distributor 14, 14a, 14b previously described, but in which the filament or ribbon denoted is made up only of woven, nonwoven, braided, nonwoven fibers. This means that 'these fibers are not impregnated with resin.
- the dispenser shown in FIG. 5 further comprises a separate container 15 containing a resin polymerizable by application of at least one stress, compatible with the fibers. of the filament or ribbon contained in the device 14 '.
- the container 15 is capable of delivering the resin, for example by pressure.
- the container 15 is, as shown in FIG. 5, a syringe whose piston 30 is actuated by a threaded screw.
- the impregnation of the fibers of the ribbon or filament 1a, by the polymerizable resin contained in the container 15, is carried out in the body of a device 16 having the shape of a hollow Y, the device 16 also forming part of the dispenser. the invention.
- the device 14 ' is placed on a first branch of the Y of the device 16.
- the device 14' is preferably provided with the end piece 12 'for fitting into the first branch of the Y of the device.
- device 16 corresponding to the nozzle 12, 12a of the distributor 14a, 14b.
- the device 14 ′ will moreover be provided with an end piece 13 ′ forming a narrowing neck, having a very small diameter, extending the end piece 12 ′, which will bring the filament or ribbon l ′ into the body of the device 16.
- L 'end piece 13' has the function of guiding the filament and ribbon 1 'until practically the exit of the device 16 and also of preventing the return of the resin in the device 14'.
- the filament or ribbon passes through the first branch of the Y by rotation of the coil around the axis of rotation XX 'as well as the body of the device 16.
- the container 15, containing the polymerizable resin is placed on the other branch of the Y forming the device 16.
- the resin contained in this container 15 is expelled from the container 15 and also passes into the body of the device 16 where it impregnates the fibers of the filament or ribbon 1a.
- the filament or ribbon 1a of fibers leaves impregnated with polymerizable and non-polymerized resin.
- this distributor can be supplied ready to use, in a single package, that is to say with the container 15, the distributor 14 'mounted ready for use in the device 16. It may be supplied in separate packages, the first package containing the device 16, the second package containing the container 15 and the third package containing the dispenser 14 '. It can be supplied in only two packages, the first package containing for example the device 16 and the container 15 and the second package containing the dispenser 14 '.
- the first packaging may also contain the device 16 and the dispenser 14 ', and the second packaging the container 15. Finally, the first packaging may contain the container 15 and the device 14', and the second packaging the device 16.
- the resin contained in the container 15 is a photocurable resin, in order to avoid pre-polymerization of this resin, the container 15 and the device 16 will be made of a material opaque to light.
- the container 15 and the device 16 will be made of a material which is not adherent to the resin.
- the dentist or the prosthetist will proceed to the manufacture of the prosthetic elements, in particular dental with the previously described process of the invention.
- the dispenser is used to handle the composite material leaving this dispenser.
- the handling of the composite material is easy because there is no manual contact with the resin.
- the filament or ribbon 1 will have the desired shape and dimensions by passing through the opening formed by the openings 7, 10, of the dispenser 14, 14 'or thanks to the end piece 12, 12 'and end piece 13.
- the distributors according to the invention have been described with openings 7, 10 rectangular or a nozzle 12, 12a, 12 ', 13, 13a, cylindrical, these may have any other shape such as for example, a rectangular, square shape and all the variants of these shapes, according to the shapes and dimensions desired for the composite material leaving the dispensers of the invention and according to the prosthetic element, in particular dental element to be obtained.
- the dispensers of the invention may be used for the manufacture of any other object, as will appear to that specialized in art.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2001295680A AU2001295680A1 (en) | 2000-10-12 | 2001-10-11 | Method for making prosthetic, in particular dental, elements and dispenser for composite material comprising fibre bundles |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR00/13095 | 2000-10-12 | ||
FR0013095A FR2815243A1 (en) | 2000-10-12 | 2000-10-12 | Process for the manufacture of prosthetics especially dental ones, by winding resin-impregnated fibres onto a prosthetic imprint |
Publications (3)
Publication Number | Publication Date |
---|---|
WO2002030312A2 true WO2002030312A2 (en) | 2002-04-18 |
WO2002030312A3 WO2002030312A3 (en) | 2002-08-08 |
WO2002030312A8 WO2002030312A8 (en) | 2004-05-13 |
Family
ID=8855292
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2001/003136 WO2002030312A2 (en) | 2000-10-12 | 2001-10-11 | Method for making prosthetic, in particular dental, elements and dispenser for composite material comprising fibre bundles |
PCT/FR2001/003134 WO2002030646A1 (en) | 2000-10-12 | 2001-10-11 | Method for making prosthetic, in particular dental, elements and dispenser for a composite material comprising fibre bundles |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2001/003134 WO2002030646A1 (en) | 2000-10-12 | 2001-10-11 | Method for making prosthetic, in particular dental, elements and dispenser for a composite material comprising fibre bundles |
Country Status (3)
Country | Link |
---|---|
AU (2) | AU2001295680A1 (en) |
FR (1) | FR2815243A1 (en) |
WO (2) | WO2002030312A2 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1454429A (en) * | 1922-11-25 | 1923-05-08 | Frank G Dresser | Dental floss dispenser |
US1608344A (en) * | 1926-01-02 | 1926-11-23 | Johnson & Johnson | Flossfont |
US3525462A (en) * | 1967-05-10 | 1970-08-25 | Hyman Freedman | Dental floss holder and dispenser |
US4448623A (en) * | 1979-05-04 | 1984-05-15 | The British Petroleum Company Limited | Wetted filament dispenser and winding therewith |
US5141521A (en) * | 1989-05-17 | 1992-08-25 | Man Technologie Aktiengesellschaft | Hip joint prosthesis shank |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1077227A (en) * | 1953-04-08 | 1954-11-05 | Plastiques Dentaires & Medicau | Method for producing the dental prosthesis in laminated synthetic resin with high mechanical resistance |
DE2634954A1 (en) * | 1976-08-04 | 1978-02-09 | Sigri Elektrographit Gmbh | JOINT PROSTHESIS |
IL88170A0 (en) * | 1988-01-21 | 1989-06-30 | Compodent Research And Applic | Novel dental post made of reinforced composite material |
DK0633754T3 (en) * | 1992-03-23 | 1998-04-14 | Howmedica | Orthopedic composite implant |
JPH05310525A (en) * | 1992-05-12 | 1993-11-22 | Ube Ind Ltd | Resin composition for reinforcing rigid resin jacket crown and method for reinforcing rigid resin jacket crown with the same |
-
2000
- 2000-10-12 FR FR0013095A patent/FR2815243A1/en not_active Withdrawn
-
2001
- 2001-10-11 WO PCT/FR2001/003136 patent/WO2002030312A2/en active Application Filing
- 2001-10-11 WO PCT/FR2001/003134 patent/WO2002030646A1/en active Application Filing
- 2001-10-11 AU AU2001295680A patent/AU2001295680A1/en not_active Abandoned
- 2001-10-11 AU AU2001295678A patent/AU2001295678A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1454429A (en) * | 1922-11-25 | 1923-05-08 | Frank G Dresser | Dental floss dispenser |
US1608344A (en) * | 1926-01-02 | 1926-11-23 | Johnson & Johnson | Flossfont |
US3525462A (en) * | 1967-05-10 | 1970-08-25 | Hyman Freedman | Dental floss holder and dispenser |
US4448623A (en) * | 1979-05-04 | 1984-05-15 | The British Petroleum Company Limited | Wetted filament dispenser and winding therewith |
US5141521A (en) * | 1989-05-17 | 1992-08-25 | Man Technologie Aktiengesellschaft | Hip joint prosthesis shank |
Also Published As
Publication number | Publication date |
---|---|
FR2815243A1 (en) | 2002-04-19 |
WO2002030312A8 (en) | 2004-05-13 |
AU2001295680A1 (en) | 2002-04-22 |
AU2001295678A1 (en) | 2002-04-22 |
WO2002030646A1 (en) | 2002-04-18 |
WO2002030312A3 (en) | 2002-08-08 |
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