A PK screw, also known as a proximal locking screw, is a specialized type of screw used in orthopedic surgery to stabilize bone fractures. It is designed with a proximal locking mechanism that prevents the screw from pulling out of the bone, ensuring greater stability and faster healing.
How PK Screws Work:
- Proximal Locking Mechanism: The screw head has a locking hole that allows a locking pin to be inserted. This pin engages with a corresponding hole in the bone plate, creating a secure and rigid connection.
- Distal Thread: The screw has a threaded portion that engages with the bone, providing additional fixation.
- Biocompatible Material: PK screws are typically made of titanium or stainless steel, materials known for their biocompatibility and resistance to corrosion.
Benefits of Using PK Screws:
- Enhanced Stability: The locking mechanism prevents the screw from backing out, providing greater stability to the fracture site.
- Reduced Risk of Complications: The increased stability can decrease the risk of bone non-union or delayed union.
- Faster Healing: The improved stability encourages faster bone healing, allowing for earlier mobilization and rehabilitation.
- Versatility: PK screws can be used in various bone fracture locations, including the femur, tibia, and humerus.
Examples of PK Screw Applications:
- Femur Fracture Fixation: PK screws are commonly used to stabilize fractures in the femur, especially in cases involving the proximal femur.
- Tibia Fracture Fixation: They are also used in tibial fracture fixation, particularly in complex fractures requiring greater stability.
- Humerus Fracture Fixation: PK screws can be employed in humerus fracture fixation, especially in proximal humeral fractures.
