PEEK Rounded Head Bioabsorbable Interference Screw

A: The interface screw, also known as the intervention screw, is a passive implantation device that is primarily used to provide firm and strong fixation of autologous or allogeneic grafts by extruding them directly into the bone tunnel. It is mainly used for soft tissue grafts and biceps tendon fixation in anterior cruciate ligament (ACL) and posterior cruciate ligament (PCL) reconstruction, etc.

A: The materials of interface screws mainly include metal, polyether ether ketone (PEEK) and absorbable materials. At present, the metal material is not common, mostly PEEK and composite absorbable material. Among them, composite resorbable materials such as PLGA+β-TCP, PLLA+HA, etc., further improve the compatibility and osteoconductive properties of the materials under the premise of ensuring mechanical properties.

A: The implantation of interface screws requires a certain degree of surgical skill and experience, but with the continuous development of technology and the improvement of surgical instruments, the difficulty of operation is gradually reduced. For experienced surgeons, the screws can be implanted into the bone tunnel more accurately under the guidance of arthroscopic and other assistive devices. However, for beginners it may require some learning and practicing process.

A: The appropriate size and length of the screw should be selected according to the patient's specific situation and surgical needs; ensure the integrity and absence of damage to the screw and other instruments; during the operation, ensure the fit of the screw to the bone, avoiding over-tightening or loosening; use the appropriate force and angle to insert the screw into the bone, avoiding over-insertion or under-insertion; and pay attention to the screw's direction to ensure that it enters the bone correctly to avoid damage to the surrounding tissues.