US4281649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Osteosynthesis method and apparatus for reducing a bone fracture
Assignee: Individual
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Filing: 1978-04-03
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Granted: 1981-08-04
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Expires: 1998-04-03
Abstract
Abstract The osteosynthesis method in accordance with the invention renders it possible to heal bone fractures of any nature, even relatively complex ones, without plaster, without pain, without external elements and within very short periods. This method consists in drilling a longitudinal passage 5 into the fractured bone from one of its extremities, in drilling a transverse hole 10 through each piece of bone, in inserting a peg 11, 12 in each transverse hole, in exerting on these pegs via a drawbar comprising a mandrel 17 in this instance whereof the screw-threaded extremity 18 is screwed into an internal screw thread of the peg 12 and whereof a shoulder 19 bears on a peg 13, a longitudinal force placing in intimate contact and exposing to a particular degree of compression the two surfaces of the break and in thus maintaining this compressive force until healing has occurred, then after this healing action, in removing the different parts in reverse order to that of their insertion.
Inventors
- 👤 Joan Derweduwen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:27
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/16; A61B17/17; A61B17/1725; A61B17/56; A61B17/58; A61B17/68; A61B17/72; A61B17/7216; A61B17/7225; A61B17/7233; A61B17/725
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
89 words
An osteosynthesis method for reducing a bone fracture, which comprises drilling a longitudinal passage into a broken bone from an extremity thereof, forming a transverse hole through each piece of bone on opposite sides of the fracture, inserting a peg into each transverse hole, exerting a force on these pegs tending to draw the pegs together by means of a compressioning means situated within the longitudinal passage so as to bring the surfaces of the fracture into intimate contact and to hold them thus until the fracture has healed.
Claim 2
Dependent Claim
89 words
An osteosynthesis method for reducing a bone fracture, which comprises drilling a longitudinal passage into a broken bone from an extremity thereof, forming a transverse hole through each piece of bone on opposite sides of the fracture, inserting a peg into each transverse hole, exerting a force on these pegs tending to draw the pegs together by means of a compressioning means situated within the longitudinal passage so as to bring the surfaces of the fracture into intimate contact and to hold them thus until the fracture has healed.
Claim 3
Dependent Claim
30 words
A method according to claim 1, wherein the transverse holes are drilled with the aid of a jig for guiding tools drilling the transverse holes in the pieces of bone.
Claim 4
Dependent Claim
21 words
A method according to claim 1 or 2, wherein a jig is also used for removal of the pegs after healing.
Claim 5
Dependent Claim
81 words
Apparatus for reducing a bone fracture which comprises first and second pegs intended to be placed in spaced transverse holes in respective bone fragments and compressioning means intended to be inserted into a passage drilled longitudinally into the broken bone so as to place the pegs under compression, wherein said compressioning means comprises a screw threaded mandrel adapted to be screwed into a tapped bore of one of the pegs while bearing against a second peg by means of a shoulder.
Claim 6
Dependent Claim
81 words
Apparatus for reducing a bone fracture which comprises first and second pegs intended to be placed in spaced transverse holes in respective bone fragments and compressioning means intended to be inserted into a passage drilled longitudinally into the broken bone so as to place the pegs under compression, wherein said compressioning means comprises a screw threaded mandrel adapted to be screwed into a tapped bore of one of the pegs while bearing against a second peg by means of a shoulder.
Claim 7
Dependent Claim
81 words
Apparatus for reducing a bone fracture which comprises first and second pegs intended to be placed in spaced transverse holes in respective bone fragments and compressioning means intended to be inserted into a passage drilled longitudinally into the broken bone so as to place the pegs under compression, wherein said compressioning means comprises a screw threaded mandrel adapted to be screwed into a tapped bore of one of the pegs while bearing against a second peg by means of a nut.
Claim 8
Dependent Claim
81 words
Apparatus for reducing a bone fracture which comprises first and second pegs intended to be placed in spaced transverse holes in respective bone fragments and compressioning means intended to be inserted into a passage drilled longitudinally into the broken bone so as to place the pegs under compression, wherein said compressioning means comprises a screw threaded mandrel adapted to be screwed into a tapped bore of one of the pegs while bearing against a second peg by means of a nut.
Claim 9
Dependent Claim
26 words
Apparatus according to claim 5, wherein the screw-thread of the mandrel extremity and a screw thread on the mandrel cooperating with the nut are contra-directionally threaded.
Claim 10
Dependent Claim
72 words
Apparatus for reducing a bone fracture which comprises first and second pegs intended to be placed in spaced transverse holes in respective bone fragments and compressioning means intended to be inserted into a passage drilled longitudianally into the broken bone so as to place the pegs under compression, wherein the compressioning means comprises a hollow mandrel and a rod positioned coaxially with respect to the tubular mandrel and co-operating with the pegs.
Claim 11
Dependent Claim
72 words
Apparatus for reducing a bone fracture which comprises first and second pegs intended to be placed in spaced transverse holes in respective bone fragments and compressioning means intended to be inserted into a passage drilled longitudianally into the broken bone so as to place the pegs under compression, wherein the compressioning means comprises a hollow mandrel and a rod positioned coaxially with respect to the tubular mandrel and co-operating with the pegs.
Claim 12
Dependent Claim
31 words
Apparatus according to claim 7, wherein the rod is screw-threaded and is adapted to be screwed into a tapped bore in one of the pegs whilst bearing against the second peg.
Claim 13
Dependent Claim
80 words
Apparatus for reducing a bone fracture which comprises first and second pegs intended to be placed in spaced transverse holes in respective bone fragments and compressioning means intended to be inserted into a passage drilled longitudinally into the broken bone so as to place the pegs under compression, wherein the compressioning means comprises a mandrel and at least one intermediate element for situation between a screw-threaded or tapped element screwed on the said mandrel, and one of the two pegs.
Claim 14
Dependent Claim
80 words
Apparatus for reducing a bone fracture which comprises first and second pegs intended to be placed in spaced transverse holes in respective bone fragments and compressioning means intended to be inserted into a passage drilled longitudinally into the broken bone so as to place the pegs under compression, wherein the compressioning means comprises a mandrel and at least one intermediate element for situation between a screw-threaded or tapped element screwed on the said mandrel, and one of the two pegs.
Claim 15
Dependent Claim
12 words
Apparatus according to claim 9, wherein said intermediate element is a rod.
Claim 16
Dependent Claim
10 words
Apparatus according to claim 9, wherein said elements are spheroids.
Claim 17
Dependent Claim
19 words
Apparatus according to claim 9, wherein said intermediate elements are two pistons between which is situated a deformable substance.
Claim 18
Dependent Claim
16 words
Apparatus according to claim 9, which further comprises a jig having at least two guiding sleeves.
Claim 19
Dependent Claim
13 words
Apparatus according to claim 13, wherein the spacing of said sleeves is adjustable.
Claim 20
Dependent Claim
10 words
Apparatus according to claim 13, wherein said sleeves are tapped.
Claim 21
Dependent Claim
59 words
Apparatus for reducing a bone fracture which comprises first and second pegs intended to be placed in spaced transverse holes in respective bone fragments and compressioning means intended to be inserted into a passage drilled longitudinally into the broken bone so as to place the pegs under compression, wherein said compressioning means comprises a hollow mandrel which is cranked.
Claim 22
Dependent Claim
59 words
Apparatus for reducing a bone fracture which comprises first and second pegs intended to be placed in spaced transverse holes in respective bone fragments and compressioning means intended to be inserted into a passage drilled longitudinally into the broken bone so as to place the pegs under compression, wherein said compressioning means comprises a hollow mandrel which is cranked.
Claim 23
Dependent Claim
17 words
Apparatus according to claim 16, which further comprises extension rods adapted to be coupled to the pegs.
Claim 24
Dependent Claim
136 words
Apparatus for reducing a bone fracture which comprises first and second pegs intended to be placed in spaced transverse holes in respective bone fragments; compressioning means intended to be inserted into a passage drilled longitudinally into the broken bone so as to place the pegs under compression, wherein said compressioning means comprises a hollow mandrel having openings for transversal by pegs; and a drilling jig adapted to be secured removably on the extremity of the mandrel, and having two series of guiding holes, the first aligned precisely with upper transverse openings made in the mandrel and the second aligned precisely with lower openings in the mandrel into which the pegs should be inserted and wherein the jig comprises means of marking at least one of the two drilled holes corresponding to the openings of the mandrel.
Claim 25
Dependent Claim
136 words
Apparatus for reducing a bone fracture which comprises first and second pegs intended to be placed in spaced transverse holes in respective bone fragments; compressioning means intended to be inserted into a passage drilled longitudinally into the broken bone so as to place the pegs under compression, wherein said compressioning means comprises a hollow mandrel having openings for transversal by pegs; and a drilling jig adapted to be secured removably on the extremity of the mandrel, and having two series of guiding holes, the first aligned precisely with upper transverse openings made in the mandrel and the second aligned precisely with lower openings in the mandrel into which the pegs should be inserted and wherein the jig comprises means of marking at least one of the two drilled holes corresponding to the openings of the mandrel.
Claim 26
Dependent Claim
12 words
Apparatus according to claim 18, wherein said marking means comprise a cursor.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-03 | 1985-02-02 | 1985-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-03 | 1989-02-02 | 1989-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-03 | 1993-02-02 | 1993-08-04 | $7700.00 | Window Closed / Lapsed |