US3818512A - Artificial hip-joint with detachable insert - Google Patents

Artificial hip-joint with detachable insert Download PDF

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Publication number
US3818512A
US3818512A US00358320A US35832073A US3818512A US 3818512 A US3818512 A US 3818512A US 00358320 A US00358320 A US 00358320A US 35832073 A US35832073 A US 35832073A US 3818512 A US3818512 A US 3818512A
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US
United States
Prior art keywords
endoprosthesis
acetabulum
femur
head
insertion piece
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.)
Expired - Lifetime
Application number
US00358320A
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English (en)
Inventor
Y Shersher
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Priority to US00358320A priority Critical patent/US3818512A/en
Priority to CH655773A priority patent/CH554668A/de
Priority to DE2323456A priority patent/DE2323456A1/de
Priority to GB2206273A priority patent/GB1415736A/en
Priority to FR7322734A priority patent/FR2233976B1/fr
Application granted granted Critical
Publication of US3818512A publication Critical patent/US3818512A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • A61F2/00—Filters 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
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    • A61F2/30739—Devices connected to the proximal part of an endoprosthetic femoral shaft for reinforcing or replacing the trochanters, e.g. the greater trochanter
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    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30537—Special structural features of bone or joint prostheses not otherwise provided for adjustable
    • A61F2002/30538—Special structural features of bone or joint prostheses not otherwise provided for adjustable for adjusting angular orientation
    • A61F2002/3054—Special structural features of bone or joint prostheses not otherwise provided for adjustable for adjusting angular orientation about a connection axis or implantation axis for selecting any one of a plurality of radial orientations between two modular parts, e.g. Morse taper connections, at discrete positions, angular positions or continuous positions
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    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3662—Femoral shafts
    • A61F2002/3678—Geometrical features
    • A61F2002/368—Geometrical features with lateral apertures, bores, holes or openings, e.g. for reducing the mass, for receiving fixation screws or for communicating with the inside of a hollow shaft
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—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
    • A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—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
    • A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2220/0033—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—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
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0017—Angular shapes
    • A61F2230/0021—Angular shapes square

Definitions

  • ABSTRACT An artificial hip-joint, wherein an endoprosthesis of the patients acetabulum is hinged to an endoprosthesis of the proximal end of the patients femur by way of an insertion piece.
  • the height of the cavity defined by the interior spherical surface of the insertion piece is greater than the radius, but smaller than the diameter, of the head of the endoprosthesis of the proximal end of the femur.
  • the insertion piece is fixed in the seat of the endoprosthesis of the acetabulum by a self-locking nut.
  • the present invention relates to artificial hip-joints employed in surgical intra-articular prosthetic replacement.
  • an artificial hipjoint which incorporates an endoprosthesis of the patients acetabulum and an endoprosthesis of the proximal end of the patients femur comprising a head, a neck and a pin introduced into the femoral medullary canal.
  • the endoprosthesis of the acetabulum may be of different designs as regards both the exterior surface and the interior one contacting the head of the endoprosthesis of the proximal end of the femur.
  • the exterior surface of the endoprosthesis of the acetabulum is provided with a single long screw which is screwed through the acetabulum and into the wing of the patients iliac bone, thereby immobilizing the acetabulum endoprosthesis in the pelvis.
  • this endoprosthesis is semi spherical, and the head of the endoprosthesis of the proximal end of the femur is immersed into the semisphere of the acetabulum endoprosthesis to a depth equal to its diameter and left there without being fixed in any way.
  • This endoprosthesis is semispherical to accommodate the head of. the endoprosthesis of the proximal end of the femur.
  • the exterior surface of the endoprosthesis of the acetabulum may be provided with blades having apertures for the advancement of burgeoning bony tissue.
  • the interior surface of the endoprosthesis of the acetabulum has a seat which receives an insertion piece made up of two identical halves.
  • the exterior surface of the insertion piece corresponds to the shape of the seat, whereas the interior surface of the insertion piece is spherical and envelops the spherical head of the endoprosthesis of the proximal end of the femur in such a way that the area of contact exceeds the semi-sphere of the head.
  • These insertion pieces are designed to couple the endoprosthesis of the acetabulum with the endoprosthesis of the proximal end of the femur.
  • the coupling is achieved by riveting the ends of the insertion piece onto the exterior surface of the acetabulum endoprosthesis, thereby ensuring a non-detachable joint.
  • an artificial hipjoint comprising an endoprosthesis of the patients acetabulum, whereof the exterior surface is adapted to be impacted in the bony tissue of the patients pelvis, and which has a seat, and an endoprosthesis of the proximal end of the patients femur incorporating a head with a spherical surface rigidly connected by way of a neck to a pin introduced into the femoral medullary canal, and intermediate the surface of the seat and the exterior spherical surface of the head there is provided an insertion piece ensuring a hinged connection of the two surfaces, which insertion piece has a spherical interior surface interacting with the spherical surface of the head, wherein, in accordance with the invention, the height of the cavity of the insertion piece defined by the interior spherical surface thereof is more than the radius, but less than the diameter, of the head, with cut-outs provided in the distal portion of the insertion piece, the blades between
  • the aritificial hip-joint of this invention offers a number of advantages.
  • the instant artificial hip-joint enables the endoprosthesis of the acetabulum and the proximal end of the femur to be put in place independently of each other in the process of an operation.
  • FIG. I is a general view, partly in section, of an artificial hip-joint in accordance with the present invention.
  • FIG. 2 is a general view, partly in section, of the artificial hip-joint of this invention, shown dismantled;
  • FIG. 3 is a general view of the artificial hip-joint of this invention taken along the arrow A in FIG. 2;
  • FIG. 4 is a general view of the artificial hipjoint of this invention taken along the arrow B in FIG. 2;
  • FIG. 5 is a general view of the artificial hip-joint of this invention taken along the arrow C in FIG. 2.
  • the artificial hip-joint of the invention comprises an endoprosthesis 1 (FIGS. 1 and 2 of the patients acetabulum, whereof the exterior surface is adapted to be impacted in the bony tissue of the patients pelvis, hinged to an endoprosthesis 2 of the proximal end of the patient's femur.
  • the endoprosthesis l of the acetabulum is provided on the exterior surface thereof with a plurality of blades 3 with tapered edges, which blades are arranged in tiers one above another and have apertures 4, wherethrough the burgeoning bony tissue of the patients pelvis may advance.
  • a seat 5 formed on the other side of the surface of the endoprosthesis I of the acetabulum (FIG. 2), which seat has an intricate shape comprised ofa cylindrical and a conical surface.
  • the seat may be of a through type, as illustrated in the drawing, or of a non-through type.
  • the distal part of the seat is provided with a thread 6.
  • the endoprosthesis 2 of the proximal end of the patients femur comprises a head 7 (FIGS. 1 and 2) with a spherical surface, which head 7 is rigidly connected by way ofa neck 8 with a tapered pin 9 introduced into the femoral medullary canal.
  • a tapered pin 9 introduced into the femoral medullary canal.
  • apertures 10 are provided in the latter.
  • the pin 9 extends into a bearing pad 11 provided with a pin 12 serving to immobilize the trochanter major.
  • An insertion piece 13 is installed intermediate the exterior spherical surface of the head 7 and the surface of the seat 5 to provide for a hinged connection of the endoprosthesis l of the acetabulum and the endoprosthesis 2 of the proximal end of the femur.
  • the exterior surface of the insertion piece 13 by its shape conforms to the shape of the interior surface of the seat 5 with a chamfer in the distal section, while the interior surface of the insertion piece 13 is spherical and interacts with the spherical surface of the head 7.
  • the height of the cavity of the insertion piece 13 (FIG. 2) defined by the latters interior spherical surface is more than the radius, but less than the diameter, of the head 7.
  • the distal portion of the insertion piece 13 (FIGS. 2 and 3) there are cut-outs 14 extending to the diameter of the spherical surface of the insertion piece 13, with the blades 15 between the cut-outs 14 forming a collet enveloping the head 7.
  • the insertion piece 13 (FIG. 2) is fixed in the seat 5 by a self-locking nut 16, whereof the exterior surface is provided with a thread 17 corresponding to the thread 6 of the seat 5 of the acetabulum endoprosthesis l.
  • the interior surface of the nut 16 is chamfered to conform to the chamfer of the distal section of the exterior surface ofthe insertion piece 13.
  • the nut 16 is provided with a locking device consisting of a longitudinal slot 18 and a screw 19.
  • the longitudinal dimension of the nut 16 exceeds the diameter of the head 7 of the endoprosthesis 2 of the proximal end of the femur.
  • the nut 16 is longitudinally less than the diameter of the head 7 of the endoprosthesis 2 of the proximal end of the femur (for example, if it is required to make the insertion piece of a material susceptible to yield under pressure), then the nut 16 must be fitted in advance over the neck 8 when assembling the endoprosthesis 2 of the proximal end of the femur or at the side of the distal end of the pin 9, in which case the dimensions of the bearing pad II are accordingly reduced.
  • the nut 16 (FIGS. 2 and 4) has four lugs 20 facilitating the operations of screwing and unscrewing.
  • FIG. 3 shows the insertion piece 13 viewed from the distal end with cut-outs 14 arranged circumferentially such that the working zone bearing the most load in walking has no cut-out 14.
  • the insertion piece 13 (FIGS. 1, 2 and 5) is provided at the proximal end thereof with a tetrahedral protrusion 21 to fit into a corresponding aperture 22 (FIG. 2) of the acetabulum endoprosthesis l.
  • the shape of the protrusion 21 and the aperture 22 prevents the insertion piece 13 from turning in the endoprosthesis l of the acetabulum.
  • the design should be free from the aperture and the protrusion.
  • the artificial hip-joint in accordance with the invention, is installed in the patients body in the following manner.
  • the artificial hip-joint Prior to the operation, the artificial hip-joint is in a dismantled form, which is achieved by unscrewing the selflocking nut 16, thereby separating the endoprosthesis 1 (FIG. 2) of the acetabulum from the endoprosthesis 2 of the proximal end of the femur and from the insertion piece 13.
  • the acetabulum endoprosthesis 1 is impacted in a depression preformed in the bony tissue of the patients pelvis.
  • the artificial hip-joint of this invention simplifies the surgical procedures involved, provides for the interchangeability of the individual parts of the prosthesis, permits a wider choice of materials for constructing the endoprostheses with a view to minimizing the intraarticular friction and rules out any possibility of dislocation of the endoprosthesis of the proximal end of the femur out of the endoprosthesis of the acetabulum.
  • An artificial hip-joint for use in a patients body comprising: a first endoprosthesis means of the patients acetabulum, having an exterior surface for impacting in the bony tissue of the patients pelvis, and a seat portion; a second endoprosthesis means of the proximal end of the patients femur hinged to said first endoprosthesis means; a head member of said second endoprosthesis means having a spherical outer surface; a neck portion of said second endoprosthesis means rigidly connected with said head member; a pin of said second endoprosthesis means rigidly connected with said neck portion for introducing into the medullary canal of the patients femur; an insert member installed intermediate the surface of said seat portion and the exterior spherical surface of said head member, which insert member provides for a hinged connection of said first and second endoprosthesis means and has an interior spherical surface interacting with the spherical surface of said head member, whereof the cavity defined by

Landscapes

  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Prostheses (AREA)
US00358320A 1973-05-08 1973-05-08 Artificial hip-joint with detachable insert Expired - Lifetime US3818512A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US00358320A US3818512A (en) 1973-05-08 1973-05-08 Artificial hip-joint with detachable insert
CH655773A CH554668A (de) 1973-05-08 1973-05-09 Kuenstliches hueftgelenk.
DE2323456A DE2323456A1 (de) 1973-05-08 1973-05-09 Kuenstliches hueftgelenk
GB2206273A GB1415736A (en) 1973-05-08 1973-05-09 Artificial hip-joints
FR7322734A FR2233976B1 (de) 1973-05-08 1973-06-21

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US00358320A US3818512A (en) 1973-05-08 1973-05-08 Artificial hip-joint with detachable insert
CH655773A CH554668A (de) 1973-05-08 1973-05-09 Kuenstliches hueftgelenk.
DE2323456A DE2323456A1 (de) 1973-05-08 1973-05-09 Kuenstliches hueftgelenk
GB2206273A GB1415736A (en) 1973-05-08 1973-05-09 Artificial hip-joints
FR7322734A FR2233976B1 (de) 1973-05-08 1973-06-21

Publications (1)

Publication Number Publication Date
US3818512A true US3818512A (en) 1974-06-25

Family

ID=27509278

Family Applications (1)

Application Number Title Priority Date Filing Date
US00358320A Expired - Lifetime US3818512A (en) 1973-05-08 1973-05-08 Artificial hip-joint with detachable insert

Country Status (5)

Country Link
US (1) US3818512A (de)
CH (1) CH554668A (de)
DE (1) DE2323456A1 (de)
FR (1) FR2233976B1 (de)
GB (1) GB1415736A (de)

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US3973278A (en) * 1974-07-08 1976-08-10 Yakov Isaevich Shersher Artificial hip-joint
US3995323A (en) * 1974-10-31 1976-12-07 Yakov Isaevich Shersher Method of preparing bone endoprosthesis model and endoprosthesis of proximal femur prepared with the aid of said model
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FR2233976A1 (de) 1975-01-17
FR2233976B1 (de) 1976-06-18
CH554668A (de) 1974-10-15
GB1415736A (en) 1975-11-26
DE2323456A1 (de) 1974-11-21

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