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Intervertebral Prosthesis
| Content Provider | The Lens |
|---|---|
| Description | L'invention concerne une prothèse intervertébrale destinée à être introduite entre des vertèbres adjacentes, laquelle prothèse intervertébrale comprend une plaque supérieure, une plaque inférieure et un noyau. Le noyau est retenu entre les plaques supérieure et inférieure par un élément de retenue sous la forme de saillies centrales sur les plaques et d'une ouverture correspondante dans le noyau. L'élément de retenue est conçu pour permettre aux plaques de coulisser sur les surfaces supérieure et inférieure du noyau dans la direction antérieure/postérieure et dans la direction latérale, et pour permettre aux plaques de tourner l'une par rapport à l'autre et par rapport au noyau. L'élément de retenue est également conçu pour empêcher le contact entre les première et seconde plaques pendant le mouvement de coulissement des plaques sur le noyau. |
| Abstract | An intervertebral prosthesis for insertion between adjacent vertebrae includes an upper plate, a lower plate and a core. The core is retained between the upper and lower plates by a retention feature in the form of central projections on the plates and a corresponding opening in the core. The retention feature is designed to allow the plates to slide over the upper and lower surfaces of the core in the anterior/posterior direction and in the lateral direction and to allow the plates to rotate with respect to each other and the core. The retention feature is also designed to prevent contact between the first and second plates during sliding movement of the plates over the core. |
| Related Links | https://www.lens.org/lens/patent/012-599-091-313-28X/frontpage |
| Language | English |
| Publisher Date | 2019-06-20 |
| Access Restriction | Open |
| Alternative Title | Prothèse Intervertébrale |
| Content Type | Text |
| Resource Type | Patent |
| Date Applied | 2018-12-11 |
| Agent | Nutt, Bernard |
| Applicant | Simplify Medical Pty Ltd |
| Application No. | 2018000253 |
| Claim | WHAT IS CLAIMED IS: An intervertebral prosthesis for insertion between adjacent vertebrae, the disc comprising: a first plate having an outer surface locatable against a respective vertebrae, an inner curved surface, an annular perimeter surrounding the inner curved surface and a lateral portion between the annular perimeter surface and the outer surface, wherein a first central projection extends from the inner curved surface; a second plate having an outer surface locatable against a respective vertebrae, an inner curved surface, an annular perimeter surface surrounding the inner curved surface and a lateral portion between the annular perimeter and the outer surface, wherein a second central projection extends from the inner curved surface toward the first plate; a core having upper and lower curved surfaces complementary in shape to the inner, curved surfaces of the first and second plates to allow the plates to slide over the upper and lower surfaces of the core and a central opening for receiving the first and second central projections; wherein the first and second central projections and central opening cooperate with one another to retain the core between the plates and limit motion of the first and second plate with respect to one another to prevent contact between the annular perimeter surfaces of the first and second plates during sliding movement of the plates over the core; and wherein the first and second central projections each have a diameter of about one half or less of a diameter of the central opening in the core. An intervertebral prosthesis of claim 1, wherein the core has a maximum height in the axial direction and a maximum diameter in the radial direction and wherein the maximum diameter is at least two times the maximum height. An intervertebral prosthesis of claim 1, wherein a diameter of the central opening of the core is at least one third of a maximum diameter in a radial direction of the core. An intervertebral prosthesis of claim 1 , wherein a maximum height of the intervertebral prosthesis in a neutral position with the first and second plates parallel and the core positioned between the plates is 5 mm or less. An intervertebral prosthesis of claim 1, wherein the first and second plates are capable of articulating about the core at least 5 degrees from a neutral position in each of the anterior/posterior and lateral directions. An intervertebral prosthesis of claim 1, wherein the first and second central projections and central opening cooperate with one another to retain the core between the plates and limit motion of the first and second plate with respect to one another to prevent contact between any part of the first and second plates during sliding movement of the plates over the core. An intervertebral prosthesis of claim 1, wherein the core has a shape of a flattened ring with a cross section having an isosceles trapezoidal shape. An intervertebral prosthesis of claim 7, wherein the core cross section has a long base within the central opening and a short base on the exterior of the core. An intervertebral prosthesis of claim 1, wherein the central opening in the core is a through opening. a first plate having an outer vertebral contacting surface, an inner bearing surface and a central projection extending from the inner bearing surface; a second plate having an outer vertebral contacting surface, an inner bearing surface and a central projection extending from the inner bearing surface toward the first plate; a core having upper and lower curved surfaces complementary in shape to the inner, bearing surfaces of the first and second plates to allow the plates to slide over the upper and lower surfaces of the core and a central opening for receiving the central projections of the first and second plates; wherein the first and second central projections and central opening cooperate with one another to retain the core between the plates and to prevent contact between any portion of the first and second plates during sliding movement of the plates over the core; and wherein the first and second plates are capable of articulating with respect to one another about the core at least 5 degrees and no more than 8 degrees from a neutral position in each of the anterior/posterior and lateral directions. An intervertebral prosthesis of claim 10, wherein the central projections of the first and second plates are substantially cylindrica An intervertebral prosthesis of claim 10, wherein the central projections of the first and second plates each have a diameter of about one half or less of a diameter of the central opening in the core. An intervertebral prosthesis of claim 10, wherein the core has a maximum height in the axial direction and a maximum diameter in the radial direction and wherein the maximum diameter is at least two times the maximum height. An intervertebral prosthesis of claim 10, wherein a diameter of the central opening of the core is at least one third of a maximum diameter of the core in a radial direction. An intervertebral prosthesis of claim 10, wherein a maximum height of the intervertebral prosthesis in a neutral position with the first and second plates parallel and the core positioned between the plates is 5 mm or less. An intervertebral prosthesis of claim 10, wherein the core has a shape of a flattened ring with a cross section having an isosceles trapezoidal shape. An intervertebral prosthesis of claim 10, wherein the central opening in the core is a through opening. A method of retaining a core in an intervertebral prosthetic disc, the method comprising: providing a first plate having an outer vertebral contacting surface, an inner bearing surface and a central projection extending from the inner bearing surface; providing a second plate having an outer vertebral contacting surface, an inner bearing surface and a central projection extending from the inner bearing surface toward the first plate; providing a core between the first and second plates, the core having upper and lower curved surfaces complementary in shape to the inner, bearing surfaces of the first and second plates to allow the plates to slide over the upper and lower surfaces of the core and a central opening for receiving the central projections of the first and second plates; retaining the core between the plates and preventing contact between the plates during sliding movement of the plates over the core by cooperation of the first and second central projections and central opening when the intervertebral prosthetic disc is in an assembled configuration; and allowing the first and second plates to articulating about the core at least 5 degrees and no more than 8 degrees from a neutral position in each of the anterior/posterior and lateral directions in the assembled configuration. A method of preventing contact between plates in an intervertebral prosthetic disc, the method comprising: preventing contact between the plates during sliding movement of the plates over the core by cooperation of the first and second central projections and central opening when the intervertebral prosthetic disc is in an assembled configuration; and allowing the first and second plates to articulating about the core at least 5 degrees from a neutral position in each of the anterior/posterior and lateral directions in the assembled configuration, wherein the first and second central projections each have a diameter of about one half or less of a diameter of the central opening in the core. An intervertebral prosthesis of claim 1, wherein the outer surfaces of the first and second plates have pyramid shaped serrations which are elongated with a larger dimension extending in a lateral direction and a smaller dimension extending in an anterior/posterior direction. An intervertebral prosthesis of claim 10, wherein the outer vertebral body contacting surfaces of the first and second plates have pyramid shaped serrations which are elongated with a larger dimension extending in a lateral direction and a smaller dimension extending in an anterior/posterior direction. |
| CPC Classification | Filters Implantable Into Blood Vessels; Prostheses; Devices Providing Patency To; Or Preventing Collapsing Of; Tubular Structures Of The Body; E.G. Stents; Orthopaedic; Nursing Or Contraceptive Devices; Fomentation; Treatment Or Protection Of Eyes Or Ears; Bandages; Dressings Or Absorbent Pads; First-Aid Kits |
| Extended Family | 195-156-815-444-677 081-779-281-101-713 091-536-224-734-262 014-112-570-781-721 174-060-876-425-105 021-197-977-796-22X 012-599-091-313-28X 009-417-559-479-78X 162-835-267-880-300 177-977-052-546-629 087-129-571-802-546 115-045-549-255-983 067-337-007-303-739 117-569-508-945-638 003-115-122-662-037 008-252-714-400-914 |
| Patent ID | 2019113624 |
| Inventor/Author | Arramon Yves Hovda David |
| IPC | A61F2/44 A61B17/70 A61F2/30 |
| Status | Pending |
| Simple Family | 195-156-815-444-677 081-779-281-101-713 091-536-224-734-262 014-112-570-781-721 174-060-876-425-105 021-197-977-796-22X 012-599-091-313-28X 009-417-559-479-78X 162-835-267-880-300 177-977-052-546-629 087-129-571-802-546 115-045-549-255-983 067-337-007-303-739 117-569-508-945-638 003-115-122-662-037 008-252-714-400-914 |
| CPC (with Group) | A61F2220/0025 A61F2/4425 A61F2002/443 A61F2002/30616 A61F2002/30836 A61F2002/30904 A61F2002/30884 A61F2002/30227 A61F2002/302 |
| Issuing Authority | United States Patent and Trademark Office (USPTO) |
| Kind | Patent Application Publication |
