GB2346327A - Bipolar screw microprosthesis of the hip - Google Patents

Bipolar screw microprosthesis of the hip Download PDF

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Publication number
GB2346327A
GB2346327A GB9901566A GB9901566A GB2346327A GB 2346327 A GB2346327 A GB 2346327A GB 9901566 A GB9901566 A GB 9901566A GB 9901566 A GB9901566 A GB 9901566A GB 2346327 A GB2346327 A GB 2346327A
Authority
GB
United Kingdom
Prior art keywords
screw
microprosthesis
bipolar
hip
length
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Withdrawn
Application number
GB9901566A
Other versions
GB9901566D0 (en
Inventor
Javier Cabrera
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB9901566A priority Critical patent/GB2346327A/en
Publication of GB9901566D0 publication Critical patent/GB9901566D0/en
Priority to GB9915217A priority patent/GB2344290B/en
Priority to AU21245/00A priority patent/AU2124500A/en
Priority to EP00901288A priority patent/EP1212014A1/en
Priority to PCT/IB2000/000115 priority patent/WO2000044315A1/en
Publication of GB2346327A publication Critical patent/GB2346327A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/34—Acetabular cups
    • 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
    • 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
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • 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
    • 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
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • 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
    • 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
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3601—Femoral heads ; Femoral endoprostheses for replacing only the epiphyseal or metaphyseal parts of the femur, e.g. endoprosthetic femoral heads or necks directly fixed to the natural femur by internal fixation devices
    • 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
    • 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
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3601—Femoral heads ; Femoral endoprostheses for replacing only the epiphyseal or metaphyseal parts of the femur, e.g. endoprosthetic femoral heads or necks directly fixed to the natural femur by internal fixation devices
    • A61F2/3603—Femoral heads ; Femoral endoprostheses for replacing only the epiphyseal or metaphyseal parts of the femur, e.g. endoprosthetic femoral heads or necks directly fixed to the natural femur by internal fixation devices implanted without ablation of the whole natural femoral head
    • 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
    • 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
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/3085—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with a threaded, e.g. self-tapping, bone-engaging surface, e.g. external surface
    • 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
    • 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
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • A61F2002/3611—Heads or epiphyseal parts of femur
    • 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
    • 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
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • A61F2002/365—Connections of heads to necks
    • 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
    • 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
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2002/4635—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor using minimally invasive surgery
    • 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
    • A61F2230/0063—Three-dimensional shapes
    • A61F2230/0069—Three-dimensional shapes cylindrical

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)

Abstract

A bipolar screw microprosthesis consisting of an outer screw which is secured into the Femur head and reaches the hip joint space. Inside the outer screw at the Femur head end is 50mm of screw thread 2 to position a inner screw carrying at the joint end a spherical metallic head 4 covered by a ceramic cup 5. By turning the inner screw with a screwdriver on ridge 8, articular space can be maintained or created in the hip joint.

Description

2346327 BIPOLAR SCREW MICROPROSTHESIS OF THE HIP This invention relates to
the use of a bipolar screw microprosthesis as a alternative to standard hip replacement technology and methods.
Hip replacements have remained unchanged in the last 30 years, namely the replacement of the Femur head with alloy irnp!lants which allow 'Ball & Socket' motion of the hip joint. The surgery involved is invasive, 'requires a great deal of physical work and so requires a great deal of training which mak s it a costly procedure to perform.
There are several hip implants in the market vhich require the removal of a large amount of bone mass to be replaced by a stiff metallic' implant which produces complications which are very well documented in medical fltrature. The removal of a large amount of bone mass to replace very thin articular damape (a couple of millimetres) is like removing a tooth because of partial decay as I)as been practised in the past.
Hip replacements are set to be one of the most common surgical procedures as life expectancy in the developed and developing orld increases so will demand for a new and cost effective method and technology.
According the existing methods and technology it is proposed to carry an endoscopy through a tunnel (18-20 mm) drilled through thl neck of the Femur, in the same way as in pin & plate methods. The tunnel will reach t6. the tip of the joint creating access to the joint space. By endoscopy we can remove forelgn bodies and re-shape the damaged articular surfaces, removing ostheophites with rotor or a special articulated and rotating burr. To implant cultivated cartilage or bone mcirphonic proteins (BMP) by using reabsorbaple staples again using endoscopy. o insert the bi - polar screw microprosthesis thought the tunnel drilled in the. Femur head to the joint space to preserve or create joint space and protect the implanted cartilage or BMP.
Once the articular surface has been re-surfaceq or repaired, the screw microprosthesis can be removed entirely to be replaced by a thrpaded Dowel type of surgibone with a cultivated cartilage at its tip.
A specific embodiment of the invention will nowrbe described by way of example with reference to the accompanying drawings in whiqh:- Figure 1 shows the construction of the inner screw Figure 2 shows the construction of the outer screw.
Figure 3 shows the position of the inner screw in relation to the outer screw once in position.
Figure 4 shows an external view of the screw miproprosthesis. This diagram shows the position of the ceramic cup and end views of the device.
Figure 5 shows a view of the outer screw in position in the Femur with the ceramic cup in position.
Figure 6 shows a cross section of the Femur and a cross section of the screw microprosthesis in position NOTE DIAGRAMS ARE NOT TO SCALE.
Referring to the drawings the bipolar screw microprosthesis will be manufactured of titanium or any other type of suitable metal, alloy or synthetic material.
It consists of an outer screw as shown in Figure 2 of 18 to 20mm in diameter, which grasps the neck of the Femur and at least 1/2 of the Femur head as shown in figure 5. The outer screw is inserted by positioning a key, which will fit into the ridges seen in figure 4 (12). In its interior at the Femur head end there are internal screw ridges as in Figure 3 (11). Into these internal ridges is screwed:
A inner screw 1 Omm shorter than the outer screw shown in figure 1. At the Femur head end is a spherical metallic head (13) covered by a ceramic cup 14 of the same circumference as the tunnel provided by the outer screw as figure 3 (15). Following from the sphere end is a series of ridges 15 which fit into the inner screw ridges of the outer screw in Figure3(1 1). The whole inner screw is inserted by positioning a screw driver into the ridge shown in figure 4(16). By turning this inner screw you can maintain or create articular space in the joint.

Claims (4)

1 Through the use of drilling (as in 'Pin Plate' method) and the use of endoscoPY, a bi-polar screw microprosthesis of th hip can be inserted. This comprises of an outer screw which is secured firmly to I the Femur and a inner screw containing a guide screw to position a spherical metallic head with a ceramic cup at the hip joint. This will maintain or create artiqular space in the joint while at the same time allowing for articular movement, The movement and positioning of both screws are controlled by a key which will fit into ridges for the outer screw and a screwdriver which will fit into the ridge Jor the inner screw.
2. A bipolar screw microprosthesis as in Iaim 1 wherein the ceramic head of the inner screw could by made of other suitable material.
3. A bipolar screw microprosthesis as in claim 1 wherein the length of the internal guide screw ridges could vary in length'
4. A bipolar screw microprosthesis as in claim 1wherein the length of the outer screw ridged length could vary.
GB9901566A 1999-01-26 1999-01-26 Bipolar screw microprosthesis of the hip Withdrawn GB2346327A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB9901566A GB2346327A (en) 1999-01-26 1999-01-26 Bipolar screw microprosthesis of the hip
GB9915217A GB2344290B (en) 1999-01-26 1999-06-29 Device for replacing or repairing a joint
AU21245/00A AU2124500A (en) 1999-01-26 2000-01-26 A device for and method of replacing or repairing a joint
EP00901288A EP1212014A1 (en) 1999-01-26 2000-01-26 A device for and method of replacing or repairing a joint
PCT/IB2000/000115 WO2000044315A1 (en) 1999-01-26 2000-01-26 A device for and method of replacing or repairing a joint

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9901566A GB2346327A (en) 1999-01-26 1999-01-26 Bipolar screw microprosthesis of the hip

Publications (2)

Publication Number Publication Date
GB9901566D0 GB9901566D0 (en) 1999-03-17
GB2346327A true GB2346327A (en) 2000-08-09

Family

ID=10846443

Family Applications (2)

Application Number Title Priority Date Filing Date
GB9901566A Withdrawn GB2346327A (en) 1999-01-26 1999-01-26 Bipolar screw microprosthesis of the hip
GB9915217A Expired - Lifetime GB2344290B (en) 1999-01-26 1999-06-29 Device for replacing or repairing a joint

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB9915217A Expired - Lifetime GB2344290B (en) 1999-01-26 1999-06-29 Device for replacing or repairing a joint

Country Status (1)

Country Link
GB (2) GB2346327A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993016663A1 (en) * 1992-02-28 1993-09-02 Aktiebolaget Astra Hip joint prosthesis

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4714478A (en) * 1986-01-17 1987-12-22 Fischer William B Prosthesis, method, and tool for installing same
SE463072B (en) * 1988-06-10 1990-10-08 Bjoern Albrektsson HOEFTLEDSPROTES
SE9600208D0 (en) * 1996-01-19 1996-01-19 Astra Ab Fixture and prosthesis including the same
NL1005234C2 (en) * 1997-02-10 1998-08-11 Novarticulate Bv Hip replacement and a method of placing such a hip replacement.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993016663A1 (en) * 1992-02-28 1993-09-02 Aktiebolaget Astra Hip joint prosthesis

Also Published As

Publication number Publication date
GB9915217D0 (en) 1999-09-01
GB2344290A (en) 2000-06-07
GB9901566D0 (en) 1999-03-17
GB2344290B (en) 2001-06-20

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