Purpose

Many studies reported mid-term clinical and radiological outcomes after cervical disc arthroplasty. Only a few studies analysed the long-term results. The aim of the study was to evaluate the clinical and radiological outcomes in patients treated with single-level Bryan cervical disc arthroplasty after 18 years of follow-up.

Methods

This study was a retrospective analysis of institutional databases concerning patients treated with Bryan cervical disc arthroplasty. SF36 PCS, NDI and VAS were used to evaluate clinical and functional outcomes. Standard, flexion–extension X-ray and MRI were used to evaluate the radiological results.

Results

Fifty-seven patients treated with single-level Bryan cervical disc arthroplasty completed the 18-year follow-up. At the final follow-up, a residual movement was observed in 32 patients (56%). The treated level range of motion decreased from 10.1° pre-operatively to 6.1° at the last follow-up (p = 0.0021). The range of motion of the adjacent segments and of the cervical spine had no significant change. Disc degeneration of the adjacent segment after 18-year follow-up was observed in 77.1% of treated patients.

Conclusion

The clinical and radiographic outcomes 18 years after surgery are acceptable. The treated level range of motion reduction and the adjacent segment degeneration seems not to affect the clinical results after 18 years of follow-up.

中文翻译：

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单层Bryan颈椎间盘置换术：18年随访后的放射学和临床结局评估。

目的

许多研究报道了颈椎间盘置换术后的中期临床和影像学结果。只有少数研究分析了长期结果。这项研究的目的是评估18年随访后接受单级Bryan颈椎间盘置换术治疗的患者的临床和放射学结果。

方法

这项研究是对Bryan颈椎间盘置换术治疗患者的机构数据库的回顾性分析。SF36 PCS，NDI和VAS用于评估临床和功能结局。标准，屈伸X线片和MRI用于评估放射学结果。

结果

接受单层Bryan颈椎间盘置换术治疗的57例患者完成了18年的随访。在最后的随访中，观察到32例患者（56％）有残余运动。治疗后的运动水平范围从术前的10.1°降低到最后一次随访时的6.1°（p  = 0.0021）。相邻节段和颈椎的运动范围没有明显变化。在77.1％的治疗患者中，观察了18年随访后相邻节段的椎间盘退变。

结论

术后18年的临床和影像学结果是可以接受的。经过18年的随访，运动水平降低和相邻节段变性的治疗水平范围似乎不影响临床结果。