screw angulation
The angle at which a screw is inserted relative to the bone surface or fracture plane.
Full Definition
Screw angulation refers to the three-dimensional orientation of a screw within bone, encompassing both the trajectory and the angle of insertion relative to anatomical landmarks. Proper screw angulation is critical for achieving optimal purchase in bone, avoiding neurovascular structures, and maximizing fixation strength. The angle may be deliberately varied to achieve specific biomechanical goals, such as interfragmentary compression or to avoid critical structures. Understanding screw angulation is essential for both preoperative planning and intraoperative execution of fracture fixation procedures.
Usage
Usage note: Use when discussing the specific geometric orientation of screws, not just their general placement.
In Context
- "The screw angulation was adjusted to avoid the adjacent neurovascular bundle." — Operative report
- "Optimal screw angulation provided maximum pullout strength in the osteoporotic bone." — Biomechanical study