Intramedullary pin with self-locking end for metadiaphyseal fractures

Claim 2

Intramedullary pin as claimed in claim 1 characterized in that said means (3) for fixing the proximal stub (2) comprise a threaded oblique hole (4) in the stub (2) in which the stem of a screw (4a) adapted to pass through the bone cortices can be screwed.

Claim 3

Intramedullary pin as claimed in claim 1 or claim 2 characterized in that the stub (2) has a slightly curved axis.

Claim 4

Intramedullary pin as claimed in any preceding claim characterized in that said stems (8) have rounded ends (9) and that one of the stems is slightly longer than the other.

Claim 5

Intramedullary pin as claimed in any preceding claim characterized in that said stems (8) have a slight procurvature for improved binding of fractured femur bones.

Claim 6

Intramedullary pin as claimed in any preceding claim characterized in that the pin comprises at least three stems.

Claim 7

Intramedullary pin as claimed in any preceding claim characterised in that once the fracture has consolidated the pin may be removed from the bone by pulling on the stub (2).

Claim 8

Intramedullary pin as claimed in claim 7 characterised in that a handle (7) may be attached to the stub (2).

Claim 9

Intramedullary pin (1) for metadiaphyseal fractures of long bones characterised in that the pin comprises a self-locking end (1a) and a proximal stub (2) provided with means (3) for fixing to the proximal cortices, the ends of at least two curved and elastically deformable stems (8) being rigidly associated axially to said stub (2), said stems (8) having, at their free ends, tips (9) which are adapted to be mutually adjacent during the insertion of the pin (1) in the medullary canal through the metadiaphysis and to release when the pin is in correct position so as to allow the elastic expansion of the stems (8), whereupon the tips (9) of said stems anchor themselves in the medullary spongy bone and press the inner walls of the bones to produce an integral coupling between the pin and the bone.

Claim 10

Intramedullary pin (1) with a self-locking end accommodated in a metadiaphyseal-fractured long bone, the pin comprising a proximal stub (2) fixed to a proximal cortex of the bone by fixing means (3), at least two curved and elastically deformable stems (8) with ends rigidly associated axially to said stub, said stems (8) extending inside the medullary canal of the bone and being elastically expanded such that the tips (9) of the stems are anchored in the intramedullary spongy bone to produce an integral coupling between the pin and the bone.