“Rescue” Screws for Stripped 3.5-mm Screw Holes: A Biomechanical Analysis of Pullout Strength and Maximum Insertional Torque of 4.0-mm and 4.5-mm Cortical Screws

Key Points

• To analyze the pullout strength and maximum insertional torque of different sizes of cortical screws in stripped screw holes.
• Biomechanical testing of 4.0-mm and 4.5-mm cortical screws in 3.5-mm stripped screw holes
• Measurement of pullout strength and maximum insertional torque
• Maximum insertional torque varied between the 4.0-mm and 4.5-mm screws
• Pullout strength showed significant differences, influencing screw selection in orthopedic procedures.