EP4135618A1 - Ensemble de pose pour l'obturation de puit(s) d'acces a la vis prothetique de pilier(s) implantaire(s) en pratique dentaire, comprenant un outil manuel et un sous-ensemble a cartouche de materiau biocompatible - Google Patents
Ensemble de pose pour l'obturation de puit(s) d'acces a la vis prothetique de pilier(s) implantaire(s) en pratique dentaire, comprenant un outil manuel et un sous-ensemble a cartouche de materiau biocompatibleInfo
- Publication number
- EP4135618A1 EP4135618A1 EP21717893.8A EP21717893A EP4135618A1 EP 4135618 A1 EP4135618 A1 EP 4135618A1 EP 21717893 A EP21717893 A EP 21717893A EP 4135618 A1 EP4135618 A1 EP 4135618A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- assembly
- cartridge
- tool
- oral
- intra
- 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.)
- Withdrawn
Links
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- 239000000560 biocompatible material Substances 0.000 title claims abstract description 19
- 239000000463 material Substances 0.000 claims description 35
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 23
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 23
- 238000009434 installation Methods 0.000 claims description 18
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
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- 240000000342 Palaquium gutta Species 0.000 description 1
- 208000006389 Peri-Implantitis Diseases 0.000 description 1
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- SNGREZUHAYWORS-UHFFFAOYSA-N perfluorooctanoic acid Chemical compound OC(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F SNGREZUHAYWORS-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C5/00—Filling or capping teeth
- A61C5/60—Devices specially adapted for pressing or mixing capping or filling materials, e.g. amalgam presses
- A61C5/62—Applicators, e.g. syringes or guns
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/15—Compositions characterised by their physical properties
- A61K6/19—Self-expanding, e.g. for filling teeth
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C5/00—Filling or capping teeth
- A61C5/50—Implements for filling root canals; Methods or instruments for medication of tooth nerve channels
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
- A61C8/0048—Connecting the upper structure to the implant, e.g. bridging bars
- A61C8/005—Connecting devices for joining an upper structure with an implant member, e.g. spacers
Definitions
- the present invention relates to the general field of dentistry, in other words dental surgery, and in particular, prosthesis on implant (s).
- It relates more particularly to the obturation of one or more access well (s) to a prosthetic screw of one or more implant abutments in dental practice and more particularly in oral implantology.
- the invention also relates to any temporary or permanent filling of the cavity of one or more natural tooth (s) to be treated.
- a prosthesis (crown or bridge on implant) is fixed on the implant / implants by means of a prosthetic abutment; intermediate stage between the implant and the prosthesis.
- the prosthesis can be sealed with dental cement or directly screwed in.
- the sheath of the prosthetic abutment screw that secures the prosthesis / abutment assembly or abutment must be sealed with a biomaterial.
- the material used must be intended for this specific use. In this case, it is a filler biomaterial that does not come into direct contact with living tissue.
- the current medical standard qualifies it as a class H a medical device.
- the material must be flexible enough to be able to be packed in the well of the prosthetic abutment until contact with the head of the screw while being waterproof and non-adhesive or not very adhesive.
- the intrinsic physical properties of the biomaterial can give it properties that are not very conducive to bacterial proliferation and any germ in general, certain components (antiseptic additives) can allow the elimination or significant reduction of the number of germs, and participate in the maintenance of good oral health and a high survival rate of implants and implant-borne prostheses.
- the white color of the biomaterial is preferable for aesthetic reasons linked to the translucency of dental ceramics and filling materials (composite, ceramic) used for screw-retained prostheses on implants and which cover the filling biomaterial of the implant socket, in particular in the aesthetic area.
- the white and clear color helps to avoid unsightly shadows, especially in the aesthetic area of anterior prostheses.
- - hygienic properties compatibility with current hygiene standards and in particular the possibility of sterilization in an autoclave; the biomaterial must be able to be delivered clean and sterile and in particular withstand temperatures allowing sterilization in an autoclave, typically at 134 ° C and in a humid atmosphere.
- this less complex procedure has little added value, it must be able to be rapid, reproducible and standardized in order to facilitate the task of the dental surgeon as much as possible.
- the diameter and the length of the sealing plug must be most precisely adapted to the size of the access hole of the prosthetic screw while taking into account the dimensional variation of the material after settlement.
- the occlusal part of the screw shaft is itself closed using a cosmetic material which is glued.
- This cosmetic sealing material for the coronal part of the well can be a composite resin produced and bonded directly into the patient's mouth or a ceramic stud made to measure in the laboratory and bonded in the mouth.
- the crown or bridge is sealed directly to the abutment using a sealing cement.
- the implant screw socket is then no longer directly accessible or visible.
- the first solution commonly implemented by dentists consists of making a foam pad or manually rolling a cotton ball then placing and packing the latter in the sheath of the implant prosthetic screw.
- the sealing cement can infiltrate up to the head of the screw and compromise future unscrewing;
- the compacted cotton generates unattractive gray shadows letting visually guess the entry of the screw hole at the level of the prosthetic tooth.
- This technique is also used for the temporary filling of an endodontic access cavity or a pulp chamber during the reconstruction of the dental walls for endodontic procedures.
- cotton is observed to mix with sizing products, as well as with the composite build-up material, and cotton filaments hamper the seal.
- this device is not applicable to all cases of obturation of implant wells, in particular those of angulated implant abutments having an open bevel sheath the gray color of the silver-based material does not meet the aesthetic criteria its cost is too high and considerably increases the final price of the prosthesis.
- This solution consists in using sheets of polytetrafluoroethylene (PTFE) which is expanded in the form of a wound tape, the thickness of which is of the order of 0.1 millimeters and which is commonly found in DIY stores. and tools and intended for plumbing use.
- PTFE polytetrafluoroethylene
- the process involves cutting approximately a length of commercially available, non-disinfected and non-sterilized PTFE tape deemed sufficient to seal the access hole of the implant prosthetic screw, then rolling the material between the fingers and packing it into the socket. access hole for the implant prosthetic screw to close it.
- Expanded PTFE is already widely used in the medical field (synthetic blood vessels and patches for soft tissue regeneration, sutures for orthopedic procedures and vascular, cardiac and general surgery procedures), as a biocompatible material. Its inertia and stability can ensure its biocompatibility as a filling biomaterial within dental prostheses of the oral sphere and dental tissues;
- expanded PTFE is compatible with the materials used in cosmetic dentistry and makes it possible to overcome cosmetic defects in screw-retained prostheses.
- Expanded PTFE is frequently used as a support for reference samples in scientific tests relating to bacterial growth. Its smooth surface condition and low surface energy make it an unfavorable substrate for bacterial development. In addition, the presence of fluorine, known for its antiseptic activity in the oral sphere, seems to reinforce the idea of its bactericidal activity, which remains to be scientifically proven.
- the material is not a medical device, and may contain toxic derivatives of the prohibited fluorine industry (in particular PFOA entering the European REACH list of prohibited industrial products): the manufacturing conditions of the product are not necessarily known and therefore do not respect, de facto, the specifications of biomaterials intended for the dental field;
- a calibrated preform intended to form a temporary or permanent sealing plug of a cavity or well of a dental prosthetic part or of a native tooth to be treated or of an inter-dental space, the preform consisting of a flexible ring made of a flexible, biocompatible material , compressible, pre-cut to a predefined length in the form of a rod of the desired gauge.
- the invention aims to meet all or part of this need.
- the object of the invention is a fitting assembly, intended for the obturation of access wells to the prosthetic screw of the implant abutment (s) in dental practice.
- a fitting assembly intended for the obturation of access wells to the prosthetic screw of the implant abutment (s) in dental practice.
- s prosthetic screw of the implant abutment
- a piston actuation trigger pivotally mounted inside the handle, to move the piston between the at least two positions
- sub-assembly comprising:
- a cartridge comprising a central duct, opening at its two ends, the cartridge being positioned in the housing of the body so that the piston can slide in the central duct;
- an intra-oral fitting end piece comprising a central duct opening at its two ends, the intraoral fitting end piece being produced entirely or fixed to the distal end of the cartridge, with its central duct facing that of the cartridge.
- carrier is meant here and within the framework of the invention, a case formed of an elongated element, preferably cylindrical, pierced within a duct opening at its two ends and which is filled beforehand with its use of a flexible and compressible ring made of biocompatible material. Once all or part of the ring has been emptied from the case, the latter can be discarded as a usual dental consumable or else sterilized and recharged with another ring, thus making it ready for use.
- the removable cartridge may contain one or more flexible rod preforms made of a biocompatible material, such as polytetrafluoroethylene (PTFE) and constitute a disposable part.
- a cartridge can contain a quantity of rod, adapted as desired beforehand to the use.
- the material constituting the manual tool and / or that of the cartridge / tip sub-assembly may be a biodegradable and biocompatible plastic material.
- the invention therefore essentially consists of a fitting assembly with a manual tool with a pushing piston and a sub-assembly filled with a ring of biocompatible material which is removable and mounted beforehand in the body of the tool.
- actuation by a dental practitioner according to a desired stroke, of a trigger mounted to pivot in the body of the tool will move a piston which will push by direct contact the ring inside the central duct of the cartridge of the sub- together, and without deformation of the flexible and compressible material of the ring as such.
- the travel path chosen by the practitioner allows him to expel a given length that he considers suitable for filling the well of an implant abutment to be closed.
- the practitioner can proceed to cut it out of the rest of the ring still present in the intra-oral fitting tip and / or in the cartridge.
- the length expelled and then cut can be chosen by the practitioner as necessary, that is to say to correspond substantially to the depth of the well to be closed.
- the practitioner takes a follower or other suitable utensil which pushes back and compacts, within the well, the flexible and compressible material of the length of the cut out ring.
- the practitioner can continue to tamp the cut length of the ring until good compression is achieved and thus ensure the tightness of the implant abutment well.
- the deformation by compaction of the compressible material conforms the latter to the shape of the well to be closed while leaving a space in the coronal zone of the well.
- This space corresponds to the area of the shaft of the implant abutment on the one hand to be closed with a filling material (composite or ceramic material) in the case of screw-retained prosthesis (s) and on the other hand to be covered with a cement for a sealed prosthesis.
- a filling material composite or ceramic material
- the empty space is necessary in order to avoid the backflow of the sealing cement at the level of the peripheral joint, a source of tissue damage and inflammatory damage to the peri-implant attachment.
- the body of the manual tool is removable and advantageously still sterilizable.
- the total length of the ring filling the central duct of the cartridge and, where appropriate, that of the intra-oral delivery nozzle is predetermined in order to produce at least two given access wells obturations.
- the material of the flexible and compressible rod can be a polytetrafluoroethylene (PTFE) which is foamed. It can also be any other compressible material fulfilling the specifications for the obturation of the access well (s) to the screw of the prosthetic abutment (s) implant (s).
- the intra-oral fitting tip has a curvature, so as to expel the rod in a direction (D) inclined with respect to the longitudinal axis (X) of the body of the tool.
- the body of the tool comprises means for securing the sub-assembly to the body of the tool.
- the fixing means can be means for clipping, fitting or screwing the sub-assembly to the body of the tool.
- the cartridge is fitted by fitting into the body of the manual tool.
- the body of the manual tool comprises a cartridge locking device configured to lock the cartridge in the body in a position of inclination of the intra-oral tip chosen by the user from among n any 360 ° position. The cartridge can then be unlocked by the user from the chosen position.
- the locking device may be an integral part of the body of the hand tool.
- a further subject of the invention is a dental obturation kit, comprising:
- the kit further comprises a manual tool as described above and / or a manual follower and / or a tweezers and / or a pair of scissors making it possible to cut a preform, and / or a periodontal probe or a probe graduated every millimeter, suitable for evaluating the depth of a cavity or a well to be closed, so as to use a rod of calibrated diameter and desired length (s), and / or a material removal instrument biocompatible sealant.
- a manual tool as described above and / or a manual follower and / or a tweezers and / or a pair of scissors making it possible to cut a preform, and / or a periodontal probe or a probe graduated every millimeter, suitable for evaluating the depth of a cavity or a well to be closed, so as to use a rod of calibrated diameter and desired length (s), and / or a material removal instrument biocompatible sealant.
- FIG. 1 represents a longitudinal sectional view of a fitting assembly according to the invention, intended to expel a length of rod made of flexible, compressible and biocompatible material for the sealing of access wells to the prosthetic screw of implant abutment (s) in dental practice, in particular in oral implantology, the placement assembly comprising a removable sub-assembly filled with a rod of flexible, compressible and biocompatible material.
- Figure IA is a longitudinal sectional view of a laying assembly according to Figure 1 without the handle, Figure IA showing a length of ring expelled by the hand tool.
- Figure 2 is a perspective view showing a removable sub-assembly consisting of a cartridge and an intraoral delivery tip.
- Figure 3 is a longitudinal sectional view of a removable sub-assembly according to the invention, filled with a ring of flexible material, compressible and biocompatible.
- Figure 4 is an exploded view in longitudinal section of the removable sub-assembly according to Figure 2.
- Figure 5 is an exploded view in longitudinal section of an implant assembly comprising a dental implant and an implant abutment with its prosthetic crown which is fixed to the implant by means of a screw.
- Figure 6 is a longitudinal sectional view showing the assembly of Figure 5 in the configuration installed in the bone, surrounded by the gum of a patient, the access hole to the prosthetic screw being closed by a compressible, flexible biomaterial rod put in place by a fitting assembly according to Figures 1 and IA.
- Figure 7 shows a longitudinal sectional view of the assembly of Figure 5 in the final configuration of placement in the bone surrounded by the gum of the patient.
- FIG. 8 is a photographic reproduction showing the placement of a ring by means of a fitting assembly according to the invention, in the access hole of a prosthetic screw of a crown on a dental implant already in place in the bone surrounded by the gum tissue of a patient.
- FIG. 9 is a side view of a delivery assembly according to an advantageous embodiment of the invention, according to which the one-piece cartridge with its intra-oral tip is mounted by fitted by interlocking into the body of the the manual tool.
- distal and proximal are used by reference with the body of a patient for which a practitioner using a set of installation according to the invention seeks to achieve the obturation of one or more access wells to the prosthetic screw of one or more implant abutments.
- the distal end of a rod is the end located innermost in the patient's mouth during the operation of placing a given length of rod.
- This assembly 1 comprises a manual fitting tool 2 and a sub-assembly 3 mounted removably, preferably by clipping.
- the manual tool 2 firstly comprises a body 20 with a longitudinal axis (X) provided with a handle 4 in which an actuating trigger 21 is pivotally mounted about an axis 22.
- the actuating trigger 21 is connected via rods 23 to a piston 24 comprising a solid cylinder 25.
- the actuation of the trigger 21 by an operator, in particular a dental practitioner makes it possible to move in translation the cylinder 25 of the piston in a housing 26 at the distal end of the body 20 in order to push a rod to expel it over a desired length.
- J in expanded PTFE as explained below.
- a guide sleeve 27 can be fixed in the body 20.
- the removable sub-assembly 3 consists of a cartridge 30 to which is fixed in particular by screwing or by interlocking an intra-oral fitting 31.
- the intra-oral delivery tip has an elbow.
- the sub-assembly 3 can be advantageously sterilized and then packaged in a bag suitable for its storage and conservation. It will be stripped of this packaging before it is mounted in the hand tool 2.
- the cartridge 30 is pierced with a central duct 300 of constant diameter over its length, opening at both ends.
- the intra-oral fitting 31 is also pierced with a central duct 310 of constant diameter over its length, opening at both ends.
- the cartridge 30 is positioned in the housing 26 of the body so that the cylinder 25 of the piston can slide in the central duct 300.
- the intraoral fitting 31 protrudes beyond the distal end face of the tool 2.
- the central conduits 300 and 310 respectively of the cartridge 30 and of G intraoral end piece 31 are preferably filled over their entire length with a J rod made of expanded PTFE or any other compressible, flexible, pre-cut and biocompatible biomaterial such as gutta. -dental percha.
- FIG. 5 shows an implant assembly 5 used in oral implantology.
- This set 5 firstly comprises an implant abutment 50 on which is overmolded and glued a prosthetic crown 51 pierced within it with an access shaft 52 to a prosthetic screw 53.
- the assembly 5 also includes a dental implant 54 comprising a central housing 55 of complementary shape with a part 56 of the abutment so as to constitute a nesting by complement of shapes.
- the expanded PTFE ring J is introduced into the access well 52 by means of the installation assembly 1 previously described, then cut and packed in order to partially close the access well 52 (FIG. 6).
- FIGS. 1A and 8 respectively show the actuation of the piston 24 in an intermediate position between its two extreme positions and the positioning of the assembly according to the invention. resting against an access hole of the implant abutment of a crown on implant 51.
- the dental practitioner who wishes to close an access shaft 52 to a prosthetic screw 53 of the implant abutment of an implant crown 51 of an implant abutment 50 has grasped the handle of the manual tool.
- the practitioner moves the piston 24, the cylinder 25 of which in direct contact with the ring J pushes on the latter so as to expel a part thereof over a desired length L (FIG. IA).
- the rod is simultaneously expelled from the intra-oral delivery nozzle 31 and introduced into the access shaft 52.
- FIG. 8 This step is illustrated in Figure 8 on which we see the mouth of a patient held apart by a tool E by the dental practitioner who simultaneously introduces into the access hole 52 of an implant abutment around which the prosthetic crown is molded. 51, a ring J by manual actuation of the full cylinder 25 introduced into the cartridge 30, the intraoral fitting end piece 31 being in direct contact with the crown 51 by being centered on the access shaft 52 .
- the practitioner can then make the cut in order to leave the length of the ring J expelled into the well by removing the installation assembly.
- Cutting can be done by a simple break caused by contact against a wall of the well or by means of a pair of scissors available to the practitioner.
- the practitioner takes a plunger or other suitable utensil which pushes back and compacts the PTLE material the length of the cut-out ring J, and is placed within the well.
- the practitioner continues to tamp the cut length of the ring until good compression is achieved and thus guarantee the tightness of the implant abutment well.
- FIG. 9 shows a fitting assembly according to an advantageous embodiment of the invention: the one-piece cartridge 30 with its intra-oral tip 31 is mounted by fitting into the body 20 of the manual tool. It can be locked by a user in any 360 ° position around the X axis, in order to obtain the desired inclination of the intraoral tip 31 and thus allow the user to have the most suitable position when closing an access shaft with the flexible ring.
- the rod J made of flexible, compressible, biocompatible material is made of expanded PTLE
- other materials may be suitable. These materials must be biocompatible and must present: - flexibility properties for on the one hand to match, before the desired expulsion, the straight and inclined conduits respectively of the cartridge and the intra-oral tip, and on the other hand for once the installation of the length of the cut-out ring placed, perfectly fill the spaces between the well and the prosthetic screw; - compressibility properties to perfectly conform to the volume of the well to be filled when settling the given length of the ring.
- the practitioner can recover the removable sub-assembly, discard the intra-oral placement tip (contaminated in the patient's mouth) that has been used or put it aside for recycling, recover the cartridge when it is still contains a sufficient length of biocompatible rod, attach a new sterile intra-oral tip, and pre-filled with the same rod in biocompatible material as mentioned above, on the recovered cartridge then reassemble the sub-assembly thus reconstituted in the manual fitting tool in order to to perform one or more other poses on another patient.
- the cartridge After the cartridge has run out, it can be discarded or collected for recycling.
Landscapes
- 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)
- Dentistry (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
- Prostheses (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2003695A FR3109082B1 (fr) | 2020-04-14 | 2020-04-14 | Ensemble de pose pour l’obturation de puit(s) d’accès à une vis prothétique dentaire, comprenant un outil manuel pour cartouche de matériau biocompatible. |
| PCT/EP2021/059591 WO2021209468A1 (fr) | 2020-04-14 | 2021-04-13 | Ensemble de pose pour l'obturation de puit(s) d'acces a la vis prothetique de pilier(s) implantaire(s) en pratique dentaire, comprenant un outil manuel et un sous-ensemble a cartouche de materiau biocompatible. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4135618A1 true EP4135618A1 (fr) | 2023-02-22 |
Family
ID=71894922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21717893.8A Withdrawn EP4135618A1 (fr) | 2020-04-14 | 2021-04-13 | Ensemble de pose pour l'obturation de puit(s) d'acces a la vis prothetique de pilier(s) implantaire(s) en pratique dentaire, comprenant un outil manuel et un sous-ensemble a cartouche de materiau biocompatible |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4135618A1 (fr) |
| FR (1) | FR3109082B1 (fr) |
| WO (1) | WO2021209468A1 (fr) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2583631A1 (fr) * | 1985-06-21 | 1986-12-26 | Marais Jean Francois | Appareil pour la distribution et la mise en place d'amalgame dentaire |
| US20030186190A1 (en) * | 2002-03-26 | 2003-10-02 | Saumil Lokhandwala | Dispenser for dental filling material |
| WO2005107627A2 (fr) * | 2004-05-05 | 2005-11-17 | Innovadontics, Inc. | Systèmes et méthodes pour for distribuer des adhésifs dans les applications médicales |
| US7976489B2 (en) * | 2007-12-04 | 2011-07-12 | Orapharma, Inc. | Device for delivering medicinal implants |
| CH705569A1 (de) * | 2011-11-01 | 2013-05-15 | Medmix Systems Ag | Austragvorrichtung für halbfeste Materialien. |
| US10182974B2 (en) * | 2016-03-30 | 2019-01-22 | Alexander SHOR | Systems, devices, and methods of making and using PFTE dental plugs |
| FR3083440A1 (fr) | 2018-07-06 | 2020-01-10 | Emmanuel Serfaty | Preforme calibree en materiau biocompatible, outil de prise et de pose associe |
-
2020
- 2020-04-14 FR FR2003695A patent/FR3109082B1/fr not_active Expired - Fee Related
-
2021
- 2021-04-13 EP EP21717893.8A patent/EP4135618A1/fr not_active Withdrawn
- 2021-04-13 WO PCT/EP2021/059591 patent/WO2021209468A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| FR3109082B1 (fr) | 2022-04-08 |
| FR3109082A1 (fr) | 2021-10-15 |
| WO2021209468A1 (fr) | 2021-10-21 |
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