WO1991019461A1 - System for osteosynthesis with axially guided prestressing elements - Google Patents
System for osteosynthesis with axially guided prestressing elements Download PDFInfo
- Publication number
- WO1991019461A1 WO1991019461A1 PCT/GR1991/000009 GR9100009W WO9119461A1 WO 1991019461 A1 WO1991019461 A1 WO 1991019461A1 GR 9100009 W GR9100009 W GR 9100009W WO 9119461 A1 WO9119461 A1 WO 9119461A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bone
- prestressing
- prestressing tendons
- fulcrum
- tendons
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/72—Intramedullary pins, nails or other devices
- A61B17/7216—Intramedullary pins, nails or other devices for bone lengthening or compression
- A61B17/7225—Intramedullary pins, nails or other devices for bone lengthening or compression for bone compression
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/72—Intramedullary pins, nails or other devices
- A61B17/7208—Flexible pins, e.g. ENDER pins
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
Definitions
- Fracture means that some force acted on the bone, stronger than its resistance limit, which had as a consequence the solution of its continuity.
- Intraosseous forces are the total of the intrastructural forces of the bone, which counteract the body weight and the muscular contraction. The intraosseous forces are eliminated after a fracture, and we are seeking the best way for their restoration.
- Prestressing means to introduce internal stresses into a material to counteract the stresses that will result from applied load.
- prestressing we need, a material resistant to tensile strength and a non-compressible material resistant to pressure forces.
- Axial prestressing is the application of prestressing coinciding with the mechanical axis of a body. That is, the introduction of a material resistant to tensile forces under tension into a body resistant to pressure forces, which in our case is the repositioned fractured bone. Anchorage points of the prestressing are the extremities of the bone.
- the first one to use a kind ot prestressing with wire was Fr. Pauwels (5), (6) (.Zug-Gurtung, Tension Banding;.
- the purpose was to neutralize the tension forces by a wire bend, mostly on other kinds of fractures than those of long bones.
- axial prestressing we aim at the restoration of intraosseous forces by using stable and elastic osteosynthesis.
- the prestressing tendons must coincide with the mechanical axis of the bone, that is, they must be introduced intramedullarly.
- the system consists of: a) Thin Prestressing Tendons b) Fulcrum for Bone Protection c) Annular Distribution Washer d) Medullary Guide of intraosseous forces and Prestressing Tendons
- Prestressing Tendons As prestressing bearers we use thin wires or bands (.commonly called 'tendons' . ) that may be made of metal or Carbon fibre plastics, or other absorbable substance ( . 7). Materials which have a great resistance to tension.
- the one end ot the Prestressing Tendons forms a sphere for the creation of a joint at their points ot anchorage.
- the Prestressing Tendons are anchored into the Fulcrum tor Bone Protection (Fig. II 6j. Points of anchorage are the epiphyses or the bone cortex near them.
- the Prestressing Tendons are also anchored into the Medullary Guide.
- the Fulcrum B.P. has a cylindrical shape, the cavity being of conical shape (female cone; and the base forming a semicircular cross-section (Fig. II 6;.
- the Fulcrum for Bone Protection protects the bone from the pressure forces caused by the Prestressing Tendons.
- the Prestressing Tendons are anchored by their spherical end into the conical cavity of the Fulcrum for Bone Protection.
- the other end of the Prestressing Tendons .is anchored into the conical cavity of the Fulcrum for Bone Protection by a cone (male conej (Fig. II 7), a wedge or an inclined groove on the female cone and a screw.
- the Prestressing Tendons may be anchored into spongy bone by the special screw, which bears the Prestressing Tendons at its base (Fig. Ill), and is introduced intramedullarl through the epiphyses.
- the base of the Fulcrum for Bone Protection forms a joint with the Distribution Washer (Fig. II 6;.
- the Distribution Washer has a concave or a convex shape, depending on the bone surface on which it is adapted.
- the side adapted to the bone bears dents.
- the innerside of its aperture is of semicircular cross-section for the formation or an articulation with the base of the Fulcrum for Bone Protection. By its surface, it also serves tor the distribution of pressure forces caused by the Prestressing Tendons. But because the Prestressing Tendons are not able to receive compound forces, we invented the Medullary Guide.
- the Medullary Guide is a cylindrical body made of thin metal or other material, which can get several shapes, depending on the bone (Fig. I, la, lb;. It is evident that we have several kinds of Medullary Guides (different diameter and length), but because of their shortness, they respect the natural curvature of the bone.
- the Medullary Guide serves: a) As support for the bone (it holds in place the repositioned fractured bone, i.e. it neutralizes the torque forces, as well as the peripheral forces caused between the fracture angle and the mechanical axis of the bone;. b) It distributes the pressure forces on the fracture surface evenly. c) It determines the direction of the Prestressing Tendons, serving as their guide, and restores the intraosseous forces.
- the shape of the Medullary Guide allows: a) An elastic compression along its lateral axis for better intramedullary adjustment. b) Great resistance along its longitudinal axis in all directions (which hinders the angling and sliding ot the fragments; . c; The neutralization ot Torque forces with the opposite directed dents with helical course (Fig. I 1;. d; The adjustment of the Prestressing Tendons with joints on its mechanical axis (Fig. I 2;. The . -joints are formed by the hollowness made on the Medullary Guide (Fig. I 2 ) and the spheric end of the Prestressing Tendons. The articulating joints lend elasticity to the system and hinder the material 's weariness.
- ADVANTAGES a) The system provides a stable and elastic osteosynthesis. Owing to the joints between the Prestressing Tendons and the anchorage and fixing points of the prestressing, we secure the longer duration ot the osteosynthesis. -b- bj It can be used tor a great variety ot tractures. c; The approach ot the fracture area is made only for the insertion of the Medullary Guide and the repositioning of the fracture (Fig. IV 2). and we do not make detachments from the bone. The Prestressing Tendons are introduced intramedullarly, with the help of a guide, through small incisions of the skin near the epiphyses (Fig. IV 1;.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GR90100453 | 1990-06-18 | ||
GR900100453 | 1990-06-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1991019461A1 true WO1991019461A1 (en) | 1991-12-26 |
Family
ID=10940167
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GR1991/000009 WO1991019461A1 (en) | 1990-06-18 | 1991-06-17 | System for osteosynthesis with axially guided prestressing elements |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0487669A1 (en) |
AU (1) | AU7960391A (en) |
GR (1) | GR1000871B (en) |
WO (1) | WO1991019461A1 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2692138A1 (en) * | 1992-06-16 | 1993-12-17 | Dev Implants Orthop Et Med | Device for stabilizing a cutting means for placing a prosthesis in bone surgery. |
EP0689800A3 (en) * | 1994-07-01 | 1996-03-27 | Kessler Sigurd | Fixation and positioning system for intramedullary load carriers |
US8287538B2 (en) | 2008-01-14 | 2012-10-16 | Conventus Orthopaedics, Inc. | Apparatus and methods for fracture repair |
US8906022B2 (en) | 2010-03-08 | 2014-12-09 | Conventus Orthopaedics, Inc. | Apparatus and methods for securing a bone implant |
US8961518B2 (en) | 2010-01-20 | 2015-02-24 | Conventus Orthopaedics, Inc. | Apparatus and methods for bone access and cavity preparation |
US9730739B2 (en) | 2010-01-15 | 2017-08-15 | Conventus Orthopaedics, Inc. | Rotary-rigid orthopaedic rod |
US10022132B2 (en) | 2013-12-12 | 2018-07-17 | Conventus Orthopaedics, Inc. | Tissue displacement tools and methods |
US10918426B2 (en) | 2017-07-04 | 2021-02-16 | Conventus Orthopaedics, Inc. | Apparatus and methods for treatment of a bone |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE913228C (en) * | 1943-12-14 | 1954-06-10 | Dr Med H C Ernst Pohl | Cross elastic inner splint for tubular bones |
US3441017A (en) * | 1965-03-24 | 1969-04-29 | Hans Jurgen Kaessmann | Apparatus for the treatment of fractures of tubular bones |
EP0134406A2 (en) * | 1983-08-19 | 1985-03-20 | Waldemar Link (GmbH & Co.) | Intramedullary fixation device |
DE8809715U1 (en) * | 1988-07-28 | 1988-10-20 | Mecron Medizinische Produkte Gmbh, 1000 Berlin, De |
-
1990
- 1990-06-18 GR GR900100453A patent/GR1000871B/en unknown
-
1991
- 1991-06-17 AU AU79603/91A patent/AU7960391A/en not_active Abandoned
- 1991-06-17 WO PCT/GR1991/000009 patent/WO1991019461A1/en not_active Application Discontinuation
- 1991-06-17 EP EP19910910514 patent/EP0487669A1/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE913228C (en) * | 1943-12-14 | 1954-06-10 | Dr Med H C Ernst Pohl | Cross elastic inner splint for tubular bones |
US3441017A (en) * | 1965-03-24 | 1969-04-29 | Hans Jurgen Kaessmann | Apparatus for the treatment of fractures of tubular bones |
EP0134406A2 (en) * | 1983-08-19 | 1985-03-20 | Waldemar Link (GmbH & Co.) | Intramedullary fixation device |
DE8809715U1 (en) * | 1988-07-28 | 1988-10-20 | Mecron Medizinische Produkte Gmbh, 1000 Berlin, De |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0575231A1 (en) * | 1992-06-16 | 1993-12-22 | Developpement Implants Orthopediques Et Medicaux | Cutting means stabilizing apparatus for implanting a prosthesis in bone surgery |
US5490855A (en) * | 1992-06-16 | 1996-02-13 | Developpement D'implants Orthopediques Et Medicaux | Device to stabilze a cutting means for the fitting of a prosthesis in bone surgery |
FR2692138A1 (en) * | 1992-06-16 | 1993-12-17 | Dev Implants Orthop Et Med | Device for stabilizing a cutting means for placing a prosthesis in bone surgery. |
EP0689800A3 (en) * | 1994-07-01 | 1996-03-27 | Kessler Sigurd | Fixation and positioning system for intramedullary load carriers |
US9788870B2 (en) | 2008-01-14 | 2017-10-17 | Conventus Orthopaedics, Inc. | Apparatus and methods for fracture repair |
US8287538B2 (en) | 2008-01-14 | 2012-10-16 | Conventus Orthopaedics, Inc. | Apparatus and methods for fracture repair |
US11399878B2 (en) | 2008-01-14 | 2022-08-02 | Conventus Orthopaedics, Inc. | Apparatus and methods for fracture repair |
US10603087B2 (en) | 2008-01-14 | 2020-03-31 | Conventus Orthopaedics, Inc. | Apparatus and methods for fracture repair |
US9517093B2 (en) | 2008-01-14 | 2016-12-13 | Conventus Orthopaedics, Inc. | Apparatus and methods for fracture repair |
US9730739B2 (en) | 2010-01-15 | 2017-08-15 | Conventus Orthopaedics, Inc. | Rotary-rigid orthopaedic rod |
US9848889B2 (en) | 2010-01-20 | 2017-12-26 | Conventus Orthopaedics, Inc. | Apparatus and methods for bone access and cavity preparation |
US8961518B2 (en) | 2010-01-20 | 2015-02-24 | Conventus Orthopaedics, Inc. | Apparatus and methods for bone access and cavity preparation |
US9993277B2 (en) | 2010-03-08 | 2018-06-12 | Conventus Orthopaedics, Inc. | Apparatus and methods for securing a bone implant |
US8906022B2 (en) | 2010-03-08 | 2014-12-09 | Conventus Orthopaedics, Inc. | Apparatus and methods for securing a bone implant |
US10022132B2 (en) | 2013-12-12 | 2018-07-17 | Conventus Orthopaedics, Inc. | Tissue displacement tools and methods |
US10076342B2 (en) | 2013-12-12 | 2018-09-18 | Conventus Orthopaedics, Inc. | Tissue displacement tools and methods |
US10918426B2 (en) | 2017-07-04 | 2021-02-16 | Conventus Orthopaedics, Inc. | Apparatus and methods for treatment of a bone |
Also Published As
Publication number | Publication date |
---|---|
GR1000871B (en) | 1993-03-16 |
AU7960391A (en) | 1992-01-07 |
EP0487669A1 (en) | 1992-06-03 |
GR900100453A (en) | 1992-08-25 |
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