Source: https://patents.google.com/patent/US6056755A/en
Timestamp: 2019-10-18 07:30:32
Document Index: 631739902

Matched Legal Cases: ['arts 3', 'art 3', 'art 2', 'art 3', 'art 2', 'art 2', 'art.\n9']

US6056755A - Method for transporting a bone segment in order to bridge a bone defect and device for carrying out the method - Google Patents
Method for transporting a bone segment in order to bridge a bone defect and device for carrying out the method Download PDF
US6056755A
US6056755A US09/180,266 US18026699A US6056755A US 6056755 A US6056755 A US 6056755A US 18026699 A US18026699 A US 18026699A US 6056755 A US6056755 A US 6056755A
US09/180,266
Uwe Peter Horas
Horas; Uwe Peter
Erben; Marcus
1996-05-09 Priority to DE19618552 priority Critical
1996-05-09 Priority to DE1996118552 priority patent/DE19618552A1/en
1997-05-09 Application filed by Horas; Uwe Peter, Erben; Marcus filed Critical Horas; Uwe Peter
1997-05-09 Priority to PCT/EP1997/002370 priority patent/WO1997042896A1/en
2000-05-02 Publication of US6056755A publication Critical patent/US6056755A/en
206010020649 Hyperkeratosis Diseases 0 claims description 2
210000000282 Nails Anatomy 0 abstract claims description 20
In order to transport a bone segment (5) in order to bridge a bone defect (4) on a tubular bone (1) in a self-inductive manner using a fully implanted device, it is proposed for the segment (5) to be driven by means of a tensile force which is generated in the cord (10) or the like by means of flexural movement of the healthy bone (9) which is articulated to the joint (8) the tensile force, from said cord or the like, is directly or indirectly applied to the segment (5) through the medullary nail in an intramedullary fashion.
The object of the invention is to develop an alternative method for transporting a bone segment with devices and which are fully implanted, which can be self operated, i.e. without external aid, by the patient him/herself and avoids the drawbacks mentioned above.
Further details of the invention can be found in the appended drawings, in which:
FIGS. 2 and 3 show two sections, rotated through 90°, through a drive according to the invention, along the longitudinal axis of the medullary nail.
In the example in accordance with FIG. 1, the preserved proximal and distal parts 3 and 2 respectively of a defective femur 1 are supported by a medullary nail 7 which has been driven into the medullary cavity and are held in position with respect to one another, spaced apart by the distance of the defect 4. A preserved bone segment 5 undergoes osteotomy from the proximal part 3 (i.e. it is cleaved off using a chisel while retaining the periosteum) and is to be transported toward the distal bone part 2 in order to bridge the defect 4. If the speed at which the segment 5 is transported is set to be appropriate for growth, the callus 6 fills the constantly widening space between segment 5 and proximal bone part 3 with newly formed bone tissue, so that at the end of the transportation of the segment 5 the defect 4 is bridged. For transport purposes, the segment 5 is suitably connected to a drive 14, and is preferably screwed onto a spindle nut 16 via a bone sleeve 18, by means of a segment screw 17. The screw thread of a threaded rod 15 is screwed into the spindle nut 16. The spindle 15 can be driven by a drive 14, i.e. is rotated, and by means of its rotation in the nut 16 transports the segment 5 along the medullary nail 7 in order for it to be connected to the distal bone part 2, the segment 5 is guided by the screw 17 into a slot 19 in the medullary nail 7. In the present example, the threaded rod is connecting the segment 5 and the drive 14 runs inside the medullary nail 7. In this case, the drive 14 ensures that when the joint is flexed in order to excite the osteogenic activity of the periosteum, the required, anatomically optimized tension direction and the tensile force which is biologically optimized in terms of time are exerted on the segment 5. Drive 14 is anchored to bone part 2 and thereby medullary nail 7 via an anchor screw connection 35.
1. A method for transporting a preserved bone segment for bridging a bone defect on a bone adjoining a knee or elbow joint, the bone defect being between a first and second bone parts being supported and maintained at a distance from each other by a medullary nail, the method comprising the steps of:
connecting the preserved bone segment to the second bone part remote from the joint using a callus;
displacing the preserved bone segment toward the first bone part closer to the joint; and
closing the defect by utilizing osteogenic power of a periosteum;
wherein said step of displacing comprises the step of self-inductively transporting the preserved bone segment by generating a tensile force in response to flexural movement of a healthy bone articulated at the joint and applying the tensile force to the preserved bone segment.
2. The method according to claim 1, wherein said step of applying a tensile force further comprises the step of providing a traction element having one end attached to the healthy bone and an opposite end connected to the bone segment.
providing an elongated threaded rod having one end coupled to said drive, and an opposing end;
providing a nut within said preserved bone segment for receiving said opposing end of said threaded rod;
converting the tensile movement of the traction cord into rotational movement of the threaded rod, said rotational movement interacting with said nut to effect the longitudinal displacement of said preserved bone segment.
providing an anchor in the healthy bone for attaching element to the healthy bone; and
eccentrically articulating the traction element on an extension side along the joint to the defective bone as far as the bone segment with respect to an anatomical-physiological pivot point of the joint.
7. The method according to claim 3, wherein said step of guiding guides the traction element to the bone segment through a longitudinal passage in the medullary nail and further comprises the step of providing a bushing in a joint side of the first bone part.
9. A device for transporting a preserved bone segment for bridging a bone defect on a bone adjoining a knee or elbow joint, the bone defect being between a first and second bone part being supported and maintained at a distance from each other by a medullary nail, the device comprising:
a traction element having one end adopted to be attached to a healthy bone and an opposing end adopted to be connected to the preserved bone segment such that flexural movement of the healthy bone relative to the defective bone transmits a tensile force and a translational movement from the point of connection to the healthy bone to the preserved bone segment; and
an anchor for attaching to the healthy bone for coupling said traction element to the healthy bone.
10. The device according to claim 9, wherein said traction element is operably guided through the medullary nail in an intramedullary fashion.
14. The device according to claim 11, further comprising means for connecting the preserved bone segment to said drive via said threaded rod, said means for connecting comprising:
a bone sleeve disposed in the preserved bone segment;
a nut threadably engaging said threaded rod; and
a segment screw for securing said preserved bone segment to said nut.
15. The device according to claim 14, wherein said medullary nail comprises a slot extending across the bone defect, said nut together with said segment screw being guided in said slot during operable displacement of said bone segment.
16. The device according to claim 11, wherein said drive further comprises:
a cylindrical housing fixed within the medullary nail in a region of the first bone part and having a front bearing and a removable rear bearing;
a spindle rotatably mounted within said housing and having a longitudinal axis on which said spindle is not displaceable, and an internal threaded part, said threaded rod being integrally formed with said spindle rod and extending out of said housing through a said front bearing for driving a spindle nut;
a coupling having a front coupling part and a rear coupling part, said rear coupling part being shifted a distance on said spindle when in a decoupled position, said rear coupling part simultaneously being a nut for receiving said screw thread of said spindle;
a sleeve having walls slidably disposed over said coupling part and a sleeve edge pressing against said front coupling part;
a return spring having one side supported against said housing and an opposing side supported against said sleeve;
a connection element for connection to said traction element; and
traction rods acting on said connection element and being guided into said housing to transmit the translational movement of said traction element to said front coupling part;
wherein said coupling, sleeve, return spring, connection element and traction rods are displaceably and rotatably disposed on said spindle.
US09/180,266 1996-05-09 1997-05-09 Method for transporting a bone segment in order to bridge a bone defect and device for carrying out the method Expired - Fee Related US6056755A (en)
DE19618552 1996-05-09
DE1996118552 DE19618552A1 (en) 1996-05-09 1996-05-09 Method for the transport of a bone segment for bridging a bone defect, and device for carrying out the method
PCT/EP1997/002370 WO1997042896A1 (en) 1996-05-09 1997-05-09 Method of conveying a bone segment for bridging of bone damage, and device for carrying out said method
US6056755A true US6056755A (en) 2000-05-02
ID=7793745
US09/180,266 Expired - Fee Related US6056755A (en) 1996-05-09 1997-05-09 Method for transporting a bone segment in order to bridge a bone defect and device for carrying out the method
US (1) US6056755A (en)
EP (1) EP0902658B1 (en)
AT (1) AT203659T (en)
DE (1) DE19618552A1 (en)
DK (1) DK0902658T3 (en)
ES (1) ES2163768T3 (en)
GR (1) GR3037036T3 (en)
PT (1) PT902658E (en)
WO (1) WO1997042896A1 (en)
DE9115810U1 (en) * 1991-12-20 1992-02-20 Howmedica Gmbh, 2314 Schoenkirchen, De
FR2717371B1 (en) * 1994-03-17 1996-05-31 Medinov Sa Conveying device of a bone fragment between two bone parts.
1996-05-09 DE DE1996118552 patent/DE19618552A1/en not_active Withdrawn
1997-05-09 PT PT97923031T patent/PT902658E/en unknown
1997-05-09 WO PCT/EP1997/002370 patent/WO1997042896A1/en active IP Right Grant
1997-05-09 AT AT97923031T patent/AT203659T/en not_active IP Right Cessation
1997-05-09 EP EP19970923031 patent/EP0902658B1/en not_active Expired - Lifetime
1997-05-09 ES ES97923031T patent/ES2163768T3/en not_active Expired - Lifetime
1997-05-09 US US09/180,266 patent/US6056755A/en not_active Expired - Fee Related
1997-05-09 DK DK97923031T patent/DK0902658T3/en active
2001-10-30 GR GR20010401906T patent/GR3037036T3/en not_active IP Right Cessation
EP0902658B1 (en) 2001-08-01
AT203659T (en) 2001-08-15
ES2163768T3 (en) 2002-02-01
DK902658T3 (en)
WO1997042896A1 (en) 1997-11-20
EP0902658A1 (en) 1999-03-24
DE19618552A1 (en) 1997-11-20
PT902658E (en) 2002-01-30
GR3037036T3 (en) 2002-01-31
DK0902658T3 (en) 2001-12-03