MRI analysis of the ISOBAR TTL internal fixation system for the dynamic fixation of intervertebral discs: a comparison with rigid internal fixation

Journal of Orthopaedic Surgery and Research

Xingbiao Wu²  Yonghua Sheng²  Zhengxiang Lv²  Dong Zhou¹  Luming Nong¹  Xi Zhang²  Weihua Zhao²  Jun Gao² 

[1] Orthopedics Department, Changzhou No. 2 People's Hospital, Nanjing Medical University, Changzhou 213000, China;Department of Orthopedics, Changzhou Traditional Chinese Medicine Hospital, Nanjing Traditional Chinese Medical University, Changzhou 213003, China

关键词: Internal fixation;    Dynamic fixation;    Magnetic resonance imaging;    Intervertebral disc degeneration;   

Others  :  813317
DOI  :  10.1186/1749-799X-9-43

 received in 2014-01-11, accepted in 2014-05-19,  发布年份 2014

【 摘 要 】

Objectives

Using magnetic resonance imaging (MRI), we analyzed the efficacy of the posterior approach lumbar ISOBAR TTL internal fixation system for the dynamic fixation of intervertebral discs, with particular emphasis on its effects on degenerative intervertebral disc disease.

Methods

We retrospectively compared the MRIs of 54 patients who had previously undergone either rigid internal fixation of the lumbar spine or ISOBAR TTL dynamic fixation for the treatment of lumbar spondylolisthesis. All patients had received preoperative and 6-, 12-, and 24-month postoperative MRI scans of the lumbar spine with acquisition of both routine and diffusion-weighted images (DWI). The upper-segment discs of the fusion were subjected to Pfirrmann grading, and the lumbar intervertebral discs in the DWI sagittal plane were manually drawn; the apparent diffusion coefficient (ADC) value was measured.

Results

ADC values in the ISOBAR TTL dynamic fixation group measured at the 6-, 12-, and 24-month postoperative MRI studies were increased compared to the preoperative ADC values. The ADC values in the ISOBAR TTL dynamic fixation group at 24 months postoperatively were significantly different from the preoperative values (P < 0.05). At 24 months, the postoperative ADC values were significantly different between the rigid fixation group and the ISOBAR TTL dynamic fixation group (P < 0.05).

Conclusion

MRI imaging findings indicated that the posterior approach lumbar ISOBAR TTL internal fixation system can prevent or delay the degeneration of intervertebral discs.

【 授权许可】

   
2014 Gao et al.; licensee BioMed Central Ltd.

【 图 表 】

Figure 1.

Figure 2.

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