Clip and osteosynthesis plate with dynamic compression and self-retention
OwnerChristian Maiinventor
Life of this patent
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Abstract
Osteosynthesis plate, made of a thermoelastic martensitic alloy whose transformation temperatures are: martensitic transformation temperature Ms below 10.degree. C.; austenitic transformation temperature As above 15.degree. C., the cross-over from the martensitic temperature to the austenitic temperature bringing about a shortening of the length of the plate, characterized in that it is educated to take a rectilinear shape at a temperature below the martensitic transformation temperature Ms of the material of which the plate is made, and an undulated shape at a temperature above the austenitic transformation temperature as of the said material.
Claims15
An osteosynthesis plate, made of a thermoelastic martensitic alloy whose martensitic transformation temperature is below 10.degree. C., and whose austenitic transformation temperature is above 15.degree. C.;
- wherein crossing over from the martensitic to the austenitic temperature results in a shortening of the length of the plate;
- wherein the plate is educated to take a rectilinear shape at temperatures below the martensitic transformation temperature of the alloy from which said plate is fabricated and an undulated shape at temperatures above the austenitic transformation temperature of said alloy;
- and
- wherein only a portion of said plate is educated and the educated portion of said plate is at all times of a cross-section smaller than the overall cross-section of said plate.
An osteosynthesis plate, having a length, fabricated of a thermoelastic martensitic alloy having a martensitic transformation temperature below 10.degree. C., and an austenitic transformation temperature above 15.degree. C.;
- wherein crossing over from the martensitic transformation temperature to the austenitic transformation temperature results in a shortening of the length of the plate;
- wherein the plate is educated to take a rectilinear shape at temperatures below the martensitic transformation temperature of the alloy from which said plate is fabricated and an undulated shape at temperatures above the austenitic transformation temperature of said alloy;
- and
- wherein only a portion of said plate is educated and the educated portion of said plate is at all times of a cross-section smaller than the overall cross-section of said plate.
An osteosynthesis clip, fabricated of a thermoelastic martensitic alloy having a martensitic transformation temperature below 10.degree. C., and an austenitic transformation temperature above 15.degree. C., comprising:
- 1) a connection base plate, having two ends and a length, wherein crossing over from the martensitic transformation temperature to the austenitic transformation temperature results in a shortening of the length of the connection base plate;
- and
- wherein the connection base plate is educated to take a rectilinear shape at temperatures below the martensitic transformation temperature of the alloy from which said connection base plate is fabricated and an undulated shape at temperatures above the austenitic transformation temperature of said alloy;
- and
- 2) a first branch and a second branch, each branch having one free end and a planar surface, and each branch being connected to one end of said base plate, said branches being intended to be inserted with one branch on each side of an area of a bone fracture to be repaired, said branches being educated so as to deform and move when brought to a temperature above the austenitic transformation temperature of the alloy from which the clip is fabricated.
An osteosynthesis clip, fabricated of a thermoelastic martensitic alloy having a martensitic transformation temperature below 10.degree. C., and an austenitic transformation temperature above 15.degree. C., comprising:
- 1) a "Y" shaped connection base plate, comprising a first branch, a second branch, and a third branch, all said branches being in a single plane, each branch having a length and a free end, wherein crossing over from the martensitic transformation temperature to the austenitic transformation temperature results in a shortening of the length of at least one branch of the connection base plate;
- and
- wherein at least one branch of the connection base plate is educated to take a rectilinear shape at temperatures below the martensitic transformation temperature of the alloy from which said connection base plate is fabricated and an undulated shape at temperatures above the austenitic transformation temperature of said alloy;
- said branch having
- 2) a first and a second segment, each segment being connected to the free end of one branch, said clip being intended to be inserted with the segments of the first branch on one side of an area of a bone fracture to be repaired and the segments of the second and third branches on the other side of an area of a bone fracture to be repaired, said segments being educated so as to deform and move under the effect of temperature above the austenitic transformation temperature.
Dependencies are inferred from the claim text.