Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
149 words
1 . Self-compressing and atraumatic osteosynthesis screw ( 1 ), comprising a threaded proximal head ( 2 ), a body ( 4 ) forming a threaded distal part ( 5 ) and, between the head and the distal part, a smooth section ( 6 ) whose length is short compared to the length of the distal part, the threading ( 7 ) of the latter having a pitch greater than that of the threading ( 3 ) of the proximal head, and a longitudinal channel ( 8 ) arranged from one end to, the other of said screw in order to receive a guide pin, characterized in that it includes means allowing it to fix the small bones or small bone fragments of the skeleton after an osteotomy or a fracture, and in particular any one of the five metatarsals ( 13 , 14 ) of a human foot.
Claim 2
Dependent Claim
149 words
1 . Self-compressing and atraumatic osteosynthesis screw ( 1 ), comprising a threaded proximal head ( 2 ), a body ( 4 ) forming a threaded distal part ( 5 ) and, between the head and the distal part, a smooth section ( 6 ) whose length is short compared to the length of the distal part, the threading ( 7 ) of the latter having a pitch greater than that of the threading ( 3 ) of the proximal head, and a longitudinal channel ( 8 ) arranged from one end to, the other of said screw in order to receive a guide pin, characterized in that it includes means allowing it to fix the small bones or small bone fragments of the skeleton after an osteotomy or a fracture, and in particular any one of the five metatarsals ( 13 , 14 ) of a human foot.
Claim 3
Dependent Claim
75 words
2 . Screw according to claim 1 , characterized in that said means comprise a diameter (d 1 ) of the threading ( 7 ) of the distal part ( 5 ) slightly greater than the diameter (d 2 ) of the root of the threading ( 3 ) of the proximal head ( 2 ), and the fact that the diameter of the channel ( 8 ) is between 0.8 and 1.0 mm approximately.
Claim 4
Dependent Claim
57 words
3 . Screw according to claim 1 or 2 , characterized in that a recess with a hexagonal wall ( 12 ) is formed in the proximal head ( 2 ) for a screwing instrument, and the distance (e) between two opposite faces ( 12 a ) of this recess is approximately 1.3 mm to 1.7 mm.
Claim 5
Dependent Claim
90 words
4 . Screw according to one of claims 1 to 3 , characterized in that the external diameter (d 1 ) of the threading ( 7 ) of the distal part ( 5 ) is between 2.3 and 2.8 mm approximately, the diameter (d 2 ) of the root of the threading ( 3 ) of the proximal head ( 2 ) is approximately 2.0 mm to 2.5 mm, and the external diameter (d 3 ) of the threading of the head is substantially between 2.8 mm and 3.5 mm.