EP0450075A1
Expired / Lapsed
EP
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Apparatus for osteosynthesis
Assignee: Nauchno-Issledovatelsky Institut Radiofiziki Imeni Akademika Aaraspletina
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Filing: 1989-10-23
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Granted: —
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Expires: 2009-10-23
Abstract
Abstract An apparatus for osteosynthesis comprises an oblong frame and at least four repositioning units. Each repositioning unit includes a slider (6) with two intersecting, longitudinal and transverse openings, a rod (15) mounted with the possibility of axial movement and fixation in the longitudinal opening of the slider (6), and a carrying element. Each carrying element consists of a thrust bushing (8) with an external thread. Through the axial opening of each thrust bushing (8) and longitudinal slots (5) in the longitudinal walls (3, 4) of the frame passes a fastening bolt (12). <IMAGE> <IMAGE>
Inventors
- 👤 Vasily Vasilievich Furdjuk
- 👤 Vladimir Efimovich Kabanov
- 👤 Boris Alexeevich Remizov
- 👤 Anatoly Vasilievich Samotsvetov
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 10:07
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/60; A61B17/64; A61B17/645; A61B17/6466; A61B17/6483; A61B17/68; A61B17/84; A61B17/86; A61B17/8625; A61B17/863; A61B17/66; A61B17/8695
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
159 words
An osteosynthesis apparatus, comprising an oblong frame (1), each of whose two parallel longitudinal walls (3, 4) having a longitudinal recess (5), and at least four repositioning units (2), each incorporating a slider (6) provided with two crossed holes, i.e., a longitudinal and a transverse one, a carrier element (7) installed in the slider transverse hole with a possibility of longitudinal travel and fixation in the longitudinal recesses (5) of the frame (1) longitudinal walls (3, 4), and a rod (15) having a self-tapping portion (18) and a threaded portion (20), said rod being fitted in the slider longitudinal hole with a possibility of axial displacement and fixation, CHARACTERIZED in that each of the carrier elements (7) is shaped as a distance sleeve (8) having a male thread (9), while a tie bolt (12) is passed through a bore (11) of the distance sleeve (8) and through the longitudinal recesses in the longitudinal walls (3,4) of the frame (1).
Claim 2
Dependent Claim
17 words
The apparatus as claimed in Claim 1, CHARACTERIZED in that the frame longitudinal walls (3,4) are flat.
Claim 3
Dependent Claim
38 words
An apparatus as claimed in Claim 1, CHARACTERIZED in that the transverse hole of the slider (6) is threaded and the distance sleeve (8) is turned into said hole, the sleeve ends having slots (10) for a wrench.
Claim 4
Dependent Claim
52 words
An apparatus as claimed in Claim 1, CHARACTERIZED in that the slider (6) is provided with a sliding nut (34) whose body (35) is installed with a possibility of free rotation in the slider longitudinal hole, while the rod (15) is turned with its threaded portion (20) into the sliding nut (34).
Claim 5
Dependent Claim
32 words
An apparatus as claimed in Claim 4, CHARACTERIZED in that the sliding nut (34) is installed on the slider (6) with a possibility of angular displacement in the frame (1) transverse plane.
Claim 6
Dependent Claim
116 words
An apparatus as claimed in Claim 1, CHARACTERIZED in that provision is therein made for a femoral neck bone fragment fixing unit (49), comprising a body (50) provided with two coplanar parallel transverse holes, a tie bolt (51) being passed through each of said coplanar holes and through the longitudinal recesses (5) in the frame longitudinal walls (3,4), with one centre hole (53), wherein body a (55) of a sliding nut (54) is fitted with a possibility of free rotation, the axis of said centre hole being arranged at an angle of 120 to 130 deggrees to the frame (1) plane, and the rod (15) turned into the sliding nut (54) with its threaded portion (20).
Claim 7
Independent Claim
63 words
An apparatus as claimed in Claims 4 and 6, CHARACTERIZED in that a cylindrical recess (25) is provided on the self-tapping rod portion (18) nearby the rod end, said recess having a length (ℓ) equal to 0.5 or 0.8 the length (L) of the self-tapping rod portion (18) and a depth, equal to 0.2 or 0.6 a depth (h) of the thread (23).
Claim 8
Dependent Claim
103 words
An apparatus as claimed in Claim 1, CHARACTERIZED in that provision is therein made for at least one energency fixation unit (42), comprising two distance sleeves (8) installed with a possibility of longitudinal travel and fixation and furnished with the tie bolt (12) passed through the bore (11) of each of said distance sleeves (8) and through the longitudinal recesses (5) in the frame longitudinal walls (3,4), while each of said distance sleeves (8) carries the slider (6) with a collet grip (43) which bears a plain stepped rod (46), said slider being capable of rotating with respect to the distance sleeve (8).
Claim 9
Dependent Claim
36 words
An apparatus as claimed in Claim 1, CHARACTERIZED in that the longitudinal recess (5) in each of the frame longitudinal wall (3,4) has at least one bridge (61) that subdivides the longitudinal recess (5), into portions.
Claim 10
Dependent Claim
87 words
An apparatus as claimed in Claim 1, CHARACTERIZED in that provision is therein made for a device (62) for an adjustable longitudinal displacement of bone fragments (31, 32) said device comprising a U-piece (63) having longitudinal slots (64) in its lateral walls (65), said slots being adapted to accommodate and fix tie bolts (66) of at least two repositioning units (2), and a means (71) for imparting longitudinal motion to said U-piece (63), while the heads of said tie bolts (66) are provided with threaded bosses (67).
Claim 11
Dependent Claim
68 words
An apparatus as claimed in Claim 10, CHARACTERIZED in that the means (71) for imparting longitudinal motion to the U-piece (63) comprises a detachable grip (72) adapted to be installed on the frame end wall (68) and an adjusting screw (73), which is fitted in a threaded hole provided in the U-piece (63) middle portion and is adapted to interact, through its end, with the detachable grip (72).
References Cited (Backward Citations)
No citation records indexed.
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