Surgery – Instruments – Orthopedic instrumentation
Patent
1997-08-06
1998-10-27
DeMille, Danton D.
Surgery
Instruments
Orthopedic instrumentation
606 57, 606 59, A61F 504
Patent
active
058272828
ABSTRACT:
In application to an external fixator wherein at least one end of a fixator body is equipped with a first ball-joint component that is releasably connected or connectible to a second ball-joint component forming part of a bone-screw clamp, the invention provides a major capacity for enlarging the achievable range of possible angles as between the longitudinal axis of the bone-screw clamp and the longitudinal axis of the fixator body. Three different embodiments are disclosed. In a first disclosed embodiment, the expanded range is achieved by structural modification of the bone-screw clamp per se. In the other two embodiments, the expanded range is achieved by interposition of a connector unit having one of its respective ends a ball-joint connection component that is uniquely compatible with the ball-joint component of the fixator body and at the other of its ends a ball-joint connection component that is uniquely compatible with the ball-joint component of the bone-screw clamp.
REFERENCES:
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patent: 4714076 (1987-12-01), Comte et al.
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patent: 5376090 (1994-12-01), Pennig
patent: 5451226 (1995-09-01), Pfeil et al.
Orthofix, "Dynamic Axial Fixation".
DeMille Danton D.
Orthofix S.r.1.
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