Boisrenoult P, Bricteux S, Beaufils P, Hardy P
Service d'Orthopédie Traumatologie, Hôpital André-Mignot, Centre Hospitalier de Versailles, 78150 Le Chesnay.
Rev Chir Orthop Reparatrice Appar Mot. 2000 Nov;86(7):707-11.
We compared in vitro the efficacy of screw-plate fixation versus double screw fixation on a model of type 2 Schatzker fracture of the lateral tibial plateau.
Ten screw-plate fixations using a lateral prebent plate and 10 double-screw fixations (6.5 mm screws) were made on 10 pairs of non-embalmed cadaver knees after simulation of type 2 Schatzker fractures. The strength of each fixation was tested with a compression device. Criteria indicating failure were displacements greater than 2 mm of one or more fracture lines. The force applied at rupture and the stiffness of each type of fixation were compared. Wilcoxon's test was used for statistical analysis.
Force at rupture and stiffness of the fixation were similar for the two types of fixation. There was no statistical difference (p > 0.05) between the screw-plate and the double-screw fixations.
Our findings on a model of type 2 Schatzker fractures are in agreement with previous data obtained by other authors working on models of type 1 Schatsker fractures. The biomechanical stability of the double-screw fixation is as good as that obtained with screw-plate fixation for the treatment of fractures of the lateral tibial plateau.
我们在体外比较了钢板螺钉固定与双螺钉固定对胫骨外侧平台2型Schatzker骨折模型的疗效。
在模拟2型Schatzker骨折后，对10对未防腐处理的尸体膝关节进行10次使用外侧预弯钢板的钢板螺钉固定和10次双螺钉（6.5毫米螺钉）固定。用压缩装置测试每种固定的强度。表明失败的标准是一条或多条骨折线的位移大于2毫米。比较每种固定类型在断裂时施加的力和刚度。采用Wilcoxon检验进行统计分析。
两种固定类型在断裂时的力和固定刚度相似。钢板螺钉固定和双螺钉固定之间无统计学差异（p>0.05）。
我们在2型Schatzker骨折模型上的研究结果与其他研究1型Schatsker骨折模型的作者先前获得的数据一致。对于胫骨外侧平台骨折的治疗，双螺钉固定的生物力学稳定性与钢板螺钉固定相当。
