Descriere

Double Threaded Compression Cannulated Screw

Q&O

Î1: What is a Double Threaded Compression Cannulated Screw?

A1: It is an orthopedic implant designed to provide strong compression and stable fixation for fractures, particularly in cancellous bone regions such as the femoral neck, olecranon, and malleolus.

Q2: Why is it called “double threaded”?

A2: Because it has two sets of threads with different pitches—one near the head and one at the tip—creating controlled interfragmentary compression during screw insertion.

Q3: What is the main function of Herbert Screw?

A3: To achieve compression between bone fragments and provide stable fixation to promote fracture healing.

Î4: What are the available sizes of Herbert Screw?

A4: Common diameters include 2.0/2.5/3.0/4.5/6.5 mm, with lengths ranging from 10 mm to 120 mm, depending on anatomical application.

Î5: Is the Herbert Screw self-tapping or self-drilling?

A5: Most models are self-tapping, but pre-drilling is recommended in dense cortical bone for easier insertion and to avoid bone splitting.

Î6: How is the Herbert Screw screw inserted during surgery?

A6: It is cannulated, meaning it can be placed precisely over a guide wire for minimally invasive or percutaneous fixation under fluoroscopic guidance.

Î7: What are the main clinical indications of Herbert Screws?

A7: It is used for internal fixation of fractures in areas such as the femoral neck, tibial plateau, olecranon, and calcaneus, where compression and stability are critical.

Î8: What are the advantages of the double-threaded design?

A8: It provides higher compression force, better interfragmentary stability, and improved bone healing compared to single-threaded screws.

Q9: Can the Herbert Screw be removed after bone healing?

A9: Da, it can be safely removed once the fracture has completely healed, depending on clinical judgment and patient condition.