OBJECTIVE  The aim of this study was to evaluate objective limb function using force plate gait analysis after tibial plateau levelling osteotomy (TPLO) in small breed dogs with cranial cruciate ligament rupture (CCLR). MATERIALS AND METHODS  Small breed dogs (15 kg or less) with unilateral CCLR treated with TPLO were evaluated using symmetry index (SI) of peak vertical force (PVF), vertical impulse and vector magnitude at PVF performed preoperatively and at 1, 2, 4 and 6 months postoperatively after routine TPLO surgery. RESULTS  Twelve dogs met the inclusion criteria. Hindlimb function was markedly improved after TPLO, with all three postoperative SI significantly higher after a month than preoperative values (p < 0.01). At 2 months after surgery, the SI was nearly normalized to 1.0 (preoperative SI: 0.50 ± 0.20, 0.44 ± 0.19 and 0.51 ± 0.19, and 2 months postoperative SI: 0.92 ± 0.16, 0.90 ± 0.18 and 0.92 ± 0.16 respectively). Complications were noted in two dogs (fibular fracture and a partial implant failure), neither of which required a revision surgery for acceptable functional recovery. CONCLUSION  The objective limb function of the affected hindlimb improved continuously after surgery and reached a near normal value at 6 months after surgery. It was suggested that TPLO for small breed dogs had good outcomes based on force plate gait analysis.

中文翻译：

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胫骨平台水平截骨术对小型犬的颅骨十字韧带破裂的作用力板步态分析和临床结果。

目的本研究旨在评估颅骨十字韧带断裂（CCLR）小型犬胫骨平台平整截骨术（TPLO）后使用力板步态分析评估客观肢体功能。材料与方法使用术前和术后1、2、4时进行的垂直垂直峰值力（PVF），垂直脉冲和矢量幅度的对称性指数（SI）评估经TPLO治疗的单侧CCLR的小型犬（15公斤或以下）常规TPLO手术后6个月。结果十二只狗符合入选标准。TPLO后后肢功能明显改善，三个月后的所有SI均显着高于术前值（p <0.01）。手术后2个月，SI几乎标准化为1.0（术前SI：0.50±0.20、0.44±0.19和0.51±0.19，和术后2个月SI：分别为0.92±0.16、0.90±0.18和0.92±0.16）。在两只狗中发现了并发症（腓骨骨折和部分植入物衰竭），它们都不要求进行翻修手术以达到可接受的功能恢复。结论受影响的后肢的客观肢体功能在手术后持续改善，并在手术后6个月达到接近正常值。根据测力板步态分析，建议小型犬的TPLO效果良好。结论受影响的后肢的客观肢体功能在手术后持续改善，并在手术后6个月达到接近正常值。根据测力板步态分析，建议小型犬的TPLO效果良好。结论受影响的后肢的客观肢体功能在手术后持续改善，并在手术后6个月达到接近正常值。根据测力板步态分析，建议小型犬的TPLO效果良好。