Orthopaedic device for the gradual correction of limbs

Details Orthopaedic device for the gradual correction of limbs Orthopaedic device for the gradual correction of limbs

1998-02-11

2001-05-22

Buiz, Michael (Department: 3731)

Surgery

Instruments

Orthopedic instrumentation

C606S057000, C606S059000

Reexamination Certificate

active

06235029

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to an orthopaedic device for the gradual correction of limbs.
It is known that external fixation devices, adjustable in length and angular attitude, are commonly utilized for correcting certain angular and longitudinal defects of long bones of limbs. Such fixation devices essentially comprise clamps which hold groups of bone screws inserted in the portions of the bone affected by defects, such clamps being slidably mounted on elements or guides longitudinally positionable externally to the limb to be treated.
The correction is normally carried out gradually with the aid of compression/distraction devices which act on the mobile clamps while the bone callous regenerates itself permitting its manipulation until the desired correction is obtained.
One known device for the gradual correction of the limbs has a lateral clamp which allows an angular correction of the bone. Such known device has the drawback that the angular rotation induces a shifting of the screws in a transverse direction which renders the correction of the limb difficult.
BRIEF STATEMENT OF THE INVENTION
One principal aim of the present invention is to overcome the above described drawbacks providing an orthopaedic device which allows a complete correction in geometric planes which are also inclined with respect to the lateral and front-rear planes, in a gradual and easily controllable manner.
With this principal aim and others in view, there is provided an orthopaedic device for the gradual correction of angular and longitudinal defects of elongated bones, comprising at least one first clamp for a first group of screws insertable in a proximal portion of a bone, and at least one second clamp for a second group of screws insertable in a distal portion of the bone, a longitudinal guide bar positioned externally of the limb to be corrected for slidably supporting said first and second clamps in longitudinally distanced positions, at least one of said clamps being selectively orientable about a substantially transverse axis for carrying out angular corrections of the bone, there being provided compression/distraction means movably coupleable with said clamps for carrying out longitudinal corrections of the bone, characterized by the fact that said at least one orientable clamp has angular adjustment means in a predetermined geometric plane, as well as transverse adjustment means for the group of bone screws carried by said clamp parallel to themselves for compensating the lateral movement induced by the angular correction.


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