Cammarata M, Wang X, Mac-Thiong J-M, Ce Aubin
École Polytechnique de Montréal, Montreal, Canada.
Stud Health Technol Inform. 2012;176:299-302.
Proximal junctional kyphosis (PJK) is a complication related to spinal instrumentation. Defined as a pathological kyphosis of levels above the upper instrumented vertebra, PJK is not yet fully understood although many studies have been conducted in this regard. The objective of this study is therefore to understand the influence of some biomechanical risk factors with respect to PJK. For this purpose, a biomechanical model has been developed and used to test three factors: the sagittal balance, the implant type used at the upper instrumented vertebra (UIV) and the proximal dissection (posterior ligaments disruption and joint capsule degeneration). The preliminary results showed that the PJK is correlated to both sagittal balance and the reduction of spinal stability due to posterior ligaments disruption and joint capsule degeneration.
近端交界性后凸（PJK）是一种与脊柱内固定相关的并发症。PJK被定义为上位固定椎体以上节段的病理性后凸，尽管在这方面已经进行了许多研究，但对其仍未完全了解。因此，本研究的目的是了解一些生物力学危险因素对PJK的影响。为此，已开发了一个生物力学模型并用于测试三个因素：矢状面平衡、上位固定椎体（UIV）使用的植入物类型以及近端解剖（后韧带断裂和关节囊退变）。初步结果表明，PJK与矢状面平衡以及后韧带断裂和关节囊退变导致的脊柱稳定性降低均相关。
