Claims
- 1. A screw for fixing proximal and distal fragments in a bone fracture, comprising
- (A) a first and second element that
- (1) are non-separably interconnected,
- (2) each have a longitudinal axis in line with the other,
- (3) longitudinally telescope with each other, and
- (4) have means for rotationally fixing the elements to each other;
- (B) the first element having
- (1) a first shank portion, and
- (2) screw threads at one end of the first shank portion integral therewith for engaging the distal fragment;
- (C) the second element having
- (1) a second shank portion in the form of a sleeve, free of threads on its outer surface for engaging the proximal fragment that longitudinally, slidably fits over the first shank portion of the first element, and
- (2) a head at an end of the second shank portion remote from the screw threads on the first shank portion for receiving means for turning the screw.
- 2. A screw of claim 1 having means for retaining the second element in the proximal fragment.
- 3. The screw of claim 2 wherein the means for retaining the second element in the proximal fragment comprise a plurality of locking rings formed on the outer surface of the second element.
- 4. A screw of claim 1 wherein the means for rotationally fixing the elements to each other comprise a hexagonally-shaped outer surface on the first shank portion, and a hexagonally-shaped inner surface in the second shank portion.
- 5. A screw of claim 1 wherein the head of the second element has a hexagonally-shaped recess to receive wrench means for turning the screw.
- 6. A screw of claim 1 wherein the first and second element are hollow and are adapted for insertion over a guide pin positioned in the proximal and distal fragments.
Parent Case Info
This application is a continuation of application Ser. No. 151,947, filed Feb. 3, 1988, now abandoned.
US Referenced Citations (21)
Foreign Referenced Citations (1)
Number |
Date |
Country |
1007659 |
Mar 1983 |
SUX |
Non-Patent Literature Citations (1)
Entry |
Asnis Guided Screw System Brochure. |
Continuations (1)
|
Number |
Date |
Country |
Parent |
151947 |
Feb 1988 |
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