Non-Locking Screw

Non-Locking Screw

Cortical bone refers to the thick outer surface of typically a long bone [for example humerus or femur shaft] that ensheaths the cavity of the bone called medulla.

Cancellous bones are found at the ends of long bones, as well as vertebrae in the pelvis, ribs, skull, and spine. It is very porous and contains red bone marrow that makes blood cells

▶▶ Products Details

It is made of TC4 material.

The types of screws are HA cortical bone screw, HB cancellous bone screw and HC locking screw. HB screws are available in full thread and half thread.

Screws of different sizes have corresponding surgical instruments.

Sizes of HA: Φ2.0, Φ2.5,Φ2.7, Φ3.5, Φ4,5

Sizes of HB; Φ4.0full, Φ4.0half, Φ6.5full, Φ6.5half

▶▶ Medical Tips

Standard cortical screws are used for diaphyseal bones, with a symmetrical head (3.5 + 4.5) and asymmetrical threads.

Standard cancellous bone screws are used for metaphysis or epiphysis, with large outer diameter and deep thread.

Lag screw technology has two mechanical components: 1 the circumferential force (friction force) along the thread, 2 the axial force when tightening, the screw screw or sliding hole allows the contralateral fracture block to be pulled toward the screw head.

▶▶ Classification Of Screws

Standard cortical screw, for diaphyseal bone, symmetrical head, asymmetrical thread.

Standard cancellous bone screw, used for metaphysis or epiphysis, large outer diameter, deep thread.

Other special screws

1. Dry screw, small friction between bone and plate

2. Locking screw, head and plate locking (fixed angle)

3. Schanz screw, used for external fixation bracket