Department of Trauma, Hand, Plastic and Reconstructive Surgery, University Clinics of Wuerzburg, Oberduerrbacher Straße 6, 97080 Wuerzburg, Germany.
Int Orthop. 2012 Oct;36(10):2121-5. doi: 10.1007/s00264-012-1604-8. Epub 2012 Jul 13.
The aim of this study was to investigate a new drillable calcium phosphate cement (Norian drillable Synthes GmbH) as a bone substitute either alone or in combination with screws in the jail technique (Petersen et al. Unfallchirurg Mar 109(3):219-234, 2006; Petersen et al. Unfallchirurg Mar 109(3):235-244, 2006) with regard to the primary stability in lateral tibial depression fractures.
Lateral depression fractures of the tibial plateau were created in a biomechanical fracture model. After reduction they were stabilised with bone substitute (group one), bone substitute with additional four screws in the jail technique (group two) or four screws only (group three). Displacement under cyclic loading, stiffness and maximum load in load-to-failure tests were determined.
The groups with the bone substitute showed a lower displacement of the depressed articular fragment under cyclical loading and a higher stiffness. The maximum load was higher for the groups with screws.
Only the combination of bone substitute and screws prevented secondary loss of reduction and, at the same time, provided enough stability under maximum load.
本研究旨在探讨一种新型可钻性磷酸钙骨水泥(诺迩康可钻性合成有限公司)作为骨替代物,单独使用或与螺钉联合使用(Petersen 等人,Unfallchirurg Mar 109(3):219-234, 2006; Petersen 等人,Unfallchirurg Mar 109(3):235-244, 2006),用于治疗外侧胫骨凹陷骨折的初始稳定性。
在生物力学骨折模型中创建胫骨平台外侧凹陷骨折。复位后,使用骨替代物(第 1 组)、骨替代物加监狱技术中的四个附加螺钉(第 2 组)或仅四个螺钉(第 3 组)进行稳定。在循环加载下,确定位移、刚度和破坏试验中的最大载荷。
使用骨替代物的组在循环加载下关节面凹陷碎片的位移较低,刚度较高。螺钉组的最大载荷更高。
只有骨替代物和螺钉的组合才能防止复位的继发性丢失,同时在最大载荷下提供足够的稳定性。