Fixation device for the external adjusting of bone fragments

Details Fixation device for the external adjusting of bone fragments Fixation device for the external adjusting of bone fragments

1988-11-03

1991-06-25

Hafer, Robert A.

Surgery

Instruments

Orthopedic instrumentation

606 59, 606105, A61F 504

Patent

active

050263722

ABSTRACT:
The invention relates to a fixation device for externally adjusting bone fragments. A pair of members anchored to the bone fragments are connected to each other to allow a longitudinal displacement of the fixing unit. According to the invention the connection of the members is defined by a hinge configuration which allows guiding and aligning both members when the fixing unit is released for stimulating the healing process. A bracket is mounted on a parallelogram hinge to generate a pressure or, respectively, a tension force to move the bone fragments apart or draw them together. According to the invention the hinge configuration comprises telescopic members centered by spring means.

REFERENCES:
patent: 3709219 (1973-01-01), Halloran
patent: 4102339 (1978-07-01), Weber et al.
patent: 4600000 (1986-07-01), Edwards
patent: 4621627 (1986-11-01), DeBastiani et al.
patent: 4628922 (1986-12-01), Dewar
patent: 4714076 (1987-12-01), Comte et al.
patent: 4745913 (1988-05-01), Castaman et al.

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