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1. WO1997039702 - HIP JOINT GLENOID CAVITY WITH A SPECIAL THREAD

Publication Number WO/1997/039702
Publication Date 30.10.1997
International Application No. PCT/DE1997/000793
International Filing Date 21.04.1997
Chapter 2 Demand Filed 18.11.1997
IPC
A61F 2/00 2006.01
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
FFILTERS 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
2Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
A61F 2/30 2006.01
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
FFILTERS 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
2Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
02Prostheses implantable into the body
30Joints
A61F 2/34 2006.01
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
FFILTERS 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
2Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
02Prostheses implantable into the body
30Joints
32for the hip
34Acetabular cups
CPC
A61F 2/34
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
FFILTERS 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
2Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
02Prostheses implantable into the body
30Joints
32for the hip
34Acetabular cups
A61F 2002/302
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
FFILTERS 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
2Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
02Prostheses implantable into the body
30Joints
30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
30108Shapes
30199Three-dimensional shapes
302toroidal, e.g. rings
A61F 2002/30322
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
FFILTERS 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
2Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
02Prostheses implantable into the body
30Joints
30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
30316The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
30317The prosthesis having different structural features at different locations within the same prosthesis
30322differing in surface structures
A61F 2002/30324
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
FFILTERS 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
2Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
02Prostheses implantable into the body
30Joints
30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
30316The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
30317The prosthesis having different structural features at different locations within the same prosthesis
30324differing in thickness
A61F 2002/30354
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
FFILTERS 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
2Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
02Prostheses implantable into the body
30Joints
30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
30316The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
30329Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
30331made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
30354Cylindrically-shaped protrusion and recess, e.g. cylinder of circular basis
A61F 2002/30378
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
FFILTERS 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
2Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
02Prostheses implantable into the body
30Joints
30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
30316The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
30329Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
30331made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
30378Spherically-shaped protrusion and recess
Applicants
  • HÖRMANSDÖRFER, Gerd [DE]/[DE]
Inventors
  • HÖRMANSDÖRFER, Gerd
Priority Data
196 15 876.122.04.1996DE
Publication Language German (DE)
Filing Language German (DE)
Designated States
Title
(DE) HÜFTGELENKPFANNE MIT SPEZIALGEWINDE
(EN) HIP JOINT GLENOID CAVITY WITH A SPECIAL THREAD
(FR) CAVITE GLENOIDE DE L'ARTICULATION DE LA HANCHE AVEC UN FILET SPECIAL
Abstract
(DE)
Die Erfindung betrifft eine einschraubbare künstliche Hüftgelenkpfanne (16) mit einem speziellen Gewinde (22-26) für die Implantation beim Menschen. Hüftpfannen der genannten Art sind gewöhnlich mit einem Flachgewinde mit parallelen Zahnflanken oder mit einem Spitzgewinde mit neutraler Zahnstellung versehen, wobei eine in axialer Richtung konstante Steigung üblich ist. Derartige Ausführungen sind jedoch ungünstig, weil sie den sowohl beim Implantieren als auch bei der bestimmungsgemäßen Belastung auftretenden Kräften nicht genügend Rechnung tragen, bzw. bei einer eventuell erforderlichen Explantation eine unnötig starke Zerstörung des Knochenbetts verursachen. Mit der Erfindung wird eine gezielt ausgerichtete Optimierung des Schraubpfannengewindes (22-26) zur Verfügung gestellt, wobei das Gewindeprofil, die winkelmäßige Stellung des Gewindezahnes (22-26) und eine nichtlineare Gewindesteigung herangezogen werden, um ein kraftsparendes Einschrauben, einen langzeitstabilen Sitz und eine unproblematische Explantation zu gewährleisten.
(EN)
A screwable artificial hip joint glenoid cavity (16) for implantation in a human being has a special thread (22-26). Glenoid cavities of this type usually have a flat thread with parallel teeth flanks or a triangular thread with a neutral teeth position, the axial pitch being usually constant. However, such embodiments are unfavourable because they do not take sufficiently into account the forces which arise during implantation and because of normal loads during use, or they cause an unnecessarily extensive bone bed destruction during explantation. The invention purposefully optimises the screwable glenoid cavity thread (22-26), ensuring an effortless screwing, a stable seat in the long term and an unproblematic explantation thanks to a special thread profile, an angular position of the thread teeth (22-26) and a non-linear thread pitch.
(FR)
L'invention concerne une cavité glénoïde artificielle vissable de l'articulation de la hanche (16) pourvue d'un filet spécial (22-26) et destinée à être implantée chez un être humain. Les cavités glénoïdes de ce type sont normalement pourvues d'un filet rectangulaire à dents à flancs parallèles ou d'un filet triangulaire à dents ayant une position neutre, le pas axial étant généralement constant. Ces modes de réalisation sont toutefois défavorables car ils ne tiennent pas suffisamment compte des forces qui s'exercent aussi bien pendant l'implantation que pendant l'utilisation, ou provoquent une destruction inutilement étendue du lit osseux au cas où l'implant devrait être extrait. L'invention optimise le filet (22-26) de la cavité glénoïde vissable, mettant en oeuvre le profil du filet, la position angulaire des dents du filet (22-26) et un pas non linéaire pour assurer un vissage sans effort, une assise stable à long terme et une extraction sans problèmes.
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