Vertebroplasty increases trabecular microfractures in elderly female cadaver spines

Area of Science:

• Orthopedic Surgery
• Biomedical Engineering
• Geriatric Medicine

Background:

• Vertebroplasty is a procedure to stabilize vertebral compression fractures and alleviate pain.
• Subsequent vertebral fractures occur in about 25% of patients post-vertebroplasty.
• Abnormal force transfer from bone cement may damage adjacent vertebrae.

Purpose of the Study:

• To quantify the impact of vertebroplasty on trabecular bone microfractures in adjacent vertebrae.
• To investigate the mechanical consequences of vertebroplasty in osteoporotic spines.

Main Methods:

• Utilized osteoporotic female cadaver spines (T11-L3) with similar T-scores and bone architecture.
• Created compression fractures in L1, injected bone cement in the vertebroplasty group.
• Subjected specimens to cyclic axial compression and analyzed microfractures in adjacent vertebral bodies (T12, L2).

Main Results:

• Vertebroplasty group showed nearly double the microfractures in superior adjacent vertebrae (0.091 vs. 0.049 microfractures/mm²).
• No significant difference in microfractures was observed in inferior adjacent vertebrae between groups.
• Statistical significance (p < 0.001) was found for superior adjacent vertebral bodies.

Conclusions:

• Vertebroplasty leads to a significant increase in trabecular microfractures in superior adjacent vertebrae.
• The findings suggest vertebroplasty may compromise the structural integrity of adjacent vertebrae.
• This research may guide the development of safer treatments for osteoporotic vertebral fractures.