Self-compressing osteosynthesis screw for surgery of small bones
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United States of America Patent
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app pub date -
Aug 26, 2002
filing date -
Dec 30, 1998
priority date (Note) -
Abandoned
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Abstract
A self-compressive and atraumatic osteosynthesis screw, includes a threaded proximal head, a body forming a threaded distal portion and, between the head and the distal part, a smooth section of short length relatively to the distal portion length, the threading thereof having a greater pitch than that of the proximal head threading, and a longitudinal channel provided from one end to the other of the screw to receive a guide pin. The screw includes a mechanism enabling it to fix small bones or small bone fragments of the skeleton after an osteotomy or a fracture, and in particular one of the five metatarsals of a human foot, including a threading diameter of the distal portion slightly greater than the diameter of the thread root of the proximal head and the diameter of the channel ranges between about 0.8 and 1.0 mm.
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