Cortex Screw: 3.5 mm


- Discussion:
    - for fixation of small bones such as forearm, fibula, & clavicle;
    - core diameter of 2.4 mm and requires a 2.5 mm drill bit;
    - 3.5 mm titanium shaft screw used as lag screw in a LC-DCP 3.5 mm
          - designed as partially threaded screw w/ shaft diameter of 3.5 mm;
          - hence it is used as a lag screw;
          - since the smooth shaft has the same diameter as the thread it provides improved stiffness and strength with the screw is used, as a load screw for axial compression


Reduction of Pullout Strength Caused by Reinsertion of 3.5-mm Cortical Screws

Comparison of Pullout Strength between 3.5-mm Screws and 4.0-mm Cancellous Screws in the Fixation of Medial Malleolar Fractures

Axial pull-out strength of 3.5 cortical and 4.0 cancellous bone screws placed in canine proximal tibias using manual and power tapping

Reduction of Pullout Strength Caused by Reinsertion of 3.5-mm Cortical Screws

Pullout strength of self-tapping screws inserted to different depths



Original Text by Clifford R. Wheeless, III, MD.

Last updated by Data Trace Staff on Tuesday, January 15, 2013 10:26 am