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Published on: May 31, 2017
[Experimental study on controlling unilateral spine growth by shape memory alloy staple]
Yong-gang Zhang1, Wei Zhang, Guo-quan Zheng
1Department of Orthopedics, General Hospital of Chinese PLA, Beijing 100853, China. zhangyg301@hotmail.com
Zhonghua Wai Ke Za Zhi [Chinese Journal of Surgery]
|August 10, 2007
Summary
Shape memory alloy (SMA) staples implanted laterally to goat thoracic vertebrae inhibited spinal growth. Greater compression from SMA staples led to more significant spinal curves, indicating a dose-dependent effect on spinal deformity.
Area of Science:
- Biomedical Engineering
- Orthopedic Surgery
- Materials Science
Context:
- Spinal deformities are a significant clinical challenge.
- Shape memory alloys (SMAs) offer unique properties for medical implants.
- Understanding the biomechanical effects of SMA implants on growing spines is crucial.
Purpose:
- To evaluate the impact of shape memory alloy (SMA) staples on thoracic spinal growth in a goat model.
- To assess the relationship between the number of SMA staples and the resulting spinal deformity.
Summary:
- Sixteen goats received either single or double lateral SMA staples along the thoracic spine (T6-T11), with a control group undergoing thoracotomy only.
- Radiographic analysis over 4 months revealed progressive scoliosis in both SMA staple groups, with Cobb angles up to 25.17 degrees.
- Kyphosis was observed in two goats, suggesting potential for complex spinal deformities.
Impact:
- SMA staple compression can inhibit spinal growth on the ipsilateral side.
- The degree of spinal deformity correlates with the extent of compression applied by SMA staples.
- Findings inform the design and application of SMA implants in spinal surgery to mitigate adverse growth effects.
