OBJECTIVE: To evaluate the influence of anatomical site of implants on vertebra about insertion torque and pull-out strength of conical and cylindrical core screws. METHODS: Conical and cylindrical core screws were inserted into the pedicle and vertebral body of 10 lumbar vertebrae (L4-L5) of calves. In the study were evaluated insertion torque and pull-out strength of screws inserted into the body and pedicle. RESULTS: The insertion torque and pull-out strength were higher for conical and cylindrical core screws inserted into vertebral pedicle. CONCLUSIONS: The anchoring of implants into the pedicle showed higher insertion torque and pull-out strength than implants inserted into the vertebral body in both types of screws used.
Spine; Bone screws; Biomechanics; Torque
