Synthesis device for orthopaedia and traumatology
OwnerPasquale Martellainventor
Life of this patent
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Abstract
The device according to the invention is composed of an axially perforated cylinder having at least one split end so as to form at least two independent sectors. The material of which the cylinder is made is a Ni—Ti alloy with hot, cold or superelastic shape memory. The cylinder is inserted in a hole that passes through the fracture region and is heated with an electric scalpel, causing the independent sectors of the split end to open out and accordingly compact and couple the two fractured segments.
Claims8
A synthesis device for orthopaedia and traumatology, comprising a cylinder which is made of a Ni—Ti alloy having shape memory, at least one of two ends of said cylinder being split outwardly openable by heating, assuming a memorized shape and maintaining said memorized shape after cooling, said cylinder having a chosen length such that when inserted in a through hole traversing a fracture line of a fractured region of a bone said at least one of the two ends protrudes by a short extent from an outer cortical region of the bone so that said split outwardly opening by heating produces a compaction and coupling of two fracture segments of said fractured region of the bone, said cylinder having a median region which continues with two end regions which are split and divided into a plurality of sectors, an axial hole being provided for insertion of a heating electric scalpel.
The synthesis device according to 1, wherein said ends of the cylinder are divided into four sectors.
A synthesis device for orthopaedia and traumatology, comprising at least two cylinders each with one end which is divided into sectors and another end which is associated at right angles with a plate which is perforated so as to form a frame, the device being entirely made of a same shape-memory alloy, said sectors of said cylinders opening out due to heating and said frame shortening in a region between the cylinders in order to compact a fracture region and bending as a whole toward the cylinders in order to assume a shape which adapts to a shape of a bone to which said device is applied.
A method for compacting a fractured region of a bone, comprising the steps of:
- providing a through hole traversing a fracture line of the fractured region of the bone;
- providing a synthesis device comprising a cylinder made of a Ni—Ti alloy having shape memory and having two ends at least one of which being split outwardly openable by heating so as to assume a memorized shape and maintain said memorized shape after cooling;
- inserting said synthesis device through said through hole such that said at least one of the two ends protrudes by a short extent from an outer cortical region of the bone so that said split outwardly opening by heating produces a compaction and coupling of two fracture segments of said fractured region of the bone.
Dependencies are inferred from the claim text.