Purpose

To evaluate the effect of K-line on posterior single-door decompression with fusion fixation (PFF) and posterior single-door decompression with non-fusion fixation (PNF) for patients with ossification of posterior longitudinal ligament (OPLL).

Methods

A total of 65 patients with OPLL were analyzed retrospectively. They consisted of 44 patients with positive K-line, designated as the K ( +) group, and 21 patients with negative K-line, designated as K (−). The patients were also divided into a PFF group (38 patients) and a PNF group (27 patients). The Japanese Orthopaedic Association (JOA) score, C2–C7 Cobb angle, improvement rate of JOA score, and complications were calculated and statistically analyzed between the groups.

Results

In the K ( +) group, there were no significant differences in the incidence of C5 nerve root palsy and C2–C7 Cobb angle between the two groups of surgical patients, but there were significant differences in the improvement rate of JOA score and the incidence of axial pain. In the K (−) group, there were no significant differences in the incidence of axial pain, the incidence of C5 nerve root palsy, and preoperative C2–C7 Cobb angle between the two groups, but significant differences were observed in the improvement rate of JOA score and C2–C7 Cobb angle at the last follow-up.

Conclusion

In the K ( +) group, the improvement rate of JOA score was higher and the incidence of axial pain was lesser in the PNF group than in the PFF group. In the K (−) group, the improvement rate of JOA score was higher in the PFF group than in the PNF group, and there was significant loss of C2–C7 Cobb angle in the PNF group.

中文翻译：

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K线对后纵韧带骨化症患者进行后颈椎手术的影响。

目的

为了评估K线对后纵韧带骨化症（OPLL）患者进行融合固定（PFF）后单门减压和不融合固定（PNF）后单门减压的效果。

方法

回顾性分析了65例OPLL患者。他们包括44名K线阳性的患者（称为K（+）组）和21名K线阴性的患者（称为K（-））。患者还分为PFF组（38例）和PNF组（27例）。计算两组之间的日本骨科协会（JOA）评分，C2-C7 Cobb角，JOA评分改善率和并发症。

结果

在K（+）组中，两组手术患者之间的C5神经根麻痹和C2-C7 Cobb角的发生率无显着差异，但JOA评分的改善率和发生率均存在显着差异轴向疼痛。在K（−）组中，两组之间的轴向疼痛发生率，C5神经根性麻痹的发生率和术前C2–C7 Cobb角的发生率均无显着差异，但两组的改善率存在显着差异。最后一次随访时的JOA评分和C2-C7 Cobb角。

结论

在K（+）组中，与PFF组相比，PNF组的JOA评分改善率更高，轴向疼痛的发生率更低。在K（-）组中，PFF组的JOA评分改善率高于PNF组，并且PNF组的C2-C7 Cobb角明显丢失。