Effect of pedicle screw diameter on screw fixation efficacy in human osteoporotic thoracic vertebrae

• Published in: Journal of biomechanics Vol. 70; pp. 196 - 203
• Main Authors: Lai, Dar-Ming, Shih, Yu-Tang, Chen, Yi-Hsing, Chien, Andy, Wang, Jaw-Lin
• Format: Journal Article
• Language: English
• Published: United States Elsevier Ltd 21.03.2018; Elsevier Limited
• Subjects: Aged; Aged, 80 and over; Biocompatibility; Biomechanical Phenomena; Biomechanics; Biomedical materials; Bone density; Bone implants; Bone mineral density; Breakage; Cadavers; Design; Family medical history; Fatigue; Fatigue failure; Female; Fixation; Humans; Implantation; Instruments; Male; Materials fatigue; Materials Testing; Middle Aged; Osteoporosis; Osteoporosis - surgery; Pedicle screw; Pedicle Screws; Pullout strength; Risk; Screws; Spine; Stiffness; Strength; Surgeons; Surgical outcomes; Thoracic Vertebrae - surgery; Thorax; Trauma; Vertebrae; United States > US; Pedicle screw; Fatigue; Pullout strength

The selection of an ideal screw size plays a crucial role in the success of spinal instrumentation as larger diameter screws are thought to provide better fixation strength but increase the risk of pedicle failure during insertion. On the other hand, smaller diameter screws are with lesser risk of p...