Surgery – Instruments – Orthopedic instrumentation
Patent
1995-01-03
1995-12-12
Pellegrino, Stephen C.
Surgery
Instruments
Orthopedic instrumentation
606 70, 606 73, A61B 1780
Patent
active
054745535
ABSTRACT:
The setting device for tubular bone fractures (3,4) consists of a longitudinally extended flattened setting element (20) and of bone screws (10), which in each case are connected to one other by means of a screw (11) and a cone (16) in addition to a taper segment section (15). The setting element (20) has an essentially rectangular cross-section of tissue-compatible high-density material, in particular of implant steel. In each of the two end sections (21) of the setting element (20), at least two bores are provided, which extend through the opposite wide sides thereof. The bone screws (10) are guided through these bores. The setting element (20) consists integrally of the two relatively rigid end pieces (21) and a connection piece (31) lying therebetween. This connection piece (31) is in comparison with the end sections (21) elastic as its cross-section is smaller than that of the end sections (21). The compact setting device formed in this way can be implanted under the skin and enables transverse forces as well as moments of flexion and torsion in the area of the fracture to be eliminated, without the implantation causing additional circulatory disurbances. Further, the normal force in the fracture area can be adjusted.
REFERENCES:
patent: 4219015 (1980-08-01), Steinemann
patent: 4338926 (1982-07-01), Kummer et al.
patent: 4408601 (1983-10-01), Wenk
patent: 4429690 (1984-02-01), Angelino-Pievani
patent: 4456004 (1984-06-01), Kenny
patent: 4683878 (1987-08-01), Carter
patent: 4794918 (1989-01-01), Wolter
patent: 5013315 (1991-05-01), Barrows
patent: 5057111 (1991-10-01), Park
De Puy brochure "Molybdenum Steel Bone Plates and Screws" 1943, author unknown.
Park, Joon Bu, Biomaterials Science and Engineering, Plenum Press, New York, 1984, pp. 11-17.
A. Earley John F.
A. Earley III John F.
Baumgart Rainer
Betz Augustin
Pellegrino Stephen C.
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