Advancements in osteoporotic spine fixation

Area of Science:

• Orthopedic Surgery
• Biomedical Engineering
• Geriatric Medicine

Background:

• Increasing elderly population and risk factors lead to more frequent encounters with osteoporotic spine conditions.
• Osteoporosis significantly compromises bone implant interface biomechanics, causing fixation failures like screw loosening and pullout.

Purpose of the Study:

• To review and synthesize current advancements in managing spinal instrumentation in osteoporotic patients.
• To highlight novel surgical techniques, implant designs, and adjunctive therapies for improving fixation and fusion outcomes.

Main Methods:

• Review of surgical technique modifications (e.g., screw diameter, pilot hole size, construct length).
• Exploration of novel surgical approaches (e.g., cortical bone trajectory, bicortical screws).
• Examination of advancements in screw design (e.g., expandable, fenestrated, coated screws) and cement augmentation (e.g., biodegradable cements).

Main Results:

• Various techniques and implant modifications show biomechanical promise for enhancing spinal instrumentation fixation in osteoporotic bone.
• Pharmacotherapy, such as teriparatide, may aid fusion and reduce pedicle screw loosening.
• Many strategies require further clinical validation through well-designed trials.

Conclusions:

• No single technique is universally effective; combining or modifying existing methods can yield near-ideal results without significant cost increases.
• Surgeons must stay updated on recent advances and remain open to novel techniques for managing osteoporotic spine.