结论：本文就一例少见的复发性多处腰椎椎弓根骨折伴椎弓峡部骨折的石骨症病例的相关问题进行了讨论。

Conclusion. This case report discusses the rare occurrence of multiple lumbar pedicle fractures and pars interarticularis (spondylolysis) fractures in a patient with osteopetrosis.

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与误置钉无关的并发症有：2例(2%)椎弓根骨折，1例(1%)神经根损伤，1例(1%)硬膜撕裂。

The complications not related to screw malposition were 2 pedicle fractures (2% of patients), 1 nerve root injury (1%), and 1 dural laceration (1%).

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目的：明确长节段椎弓根螺钉重建后发生近端急性骨折的危险性及疗效。

Objective. To determine risk factors and outcomes for acute fractures at the proximal aspect of long pedicle screw constructs.

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