Outcomes of tibial avulsion fracture of the posterior cruciate ligament treated with a homemade hook plate

ObjectiveTo compare the clinical effects of an inverted L-shaped postero-medial approach with a homemade hook plate and arthroscopic fixation with Endobutton for tibial avulsion fractures of the posterior cruciate ligament.MethodsThe clinical data of 36 patients with PCL tibial avulsion fractures from January 2012 to December 2019 were analyzed retrospectively. The fractures were classified into Meyers-McKeever types II and III. Among them, 20 cases were treated with a homemade hook plate through an inverted L-shaped postero-medial approach (incision group), and 16 cases were treated with Endobutton under arthroscopy (arthroscopic group). The operative time, fracture union time, operative complications and range of motion of the knee joint were compared between the two groups. The stability of the knee joint was tested by the posterior drawer test, the functional recovery of the knee joint was evaluated by the Lysholm score, and the gastrocnemius muscle strength of the incision group was tested by performing heel raises with a single leg stance.ResultsThere were no adverse events, such as fracture nonunion, infection, deep-vein thrombosis, abnormal hematoma or joint stiffness, in either group. The operative time was shorter in the incision group, and the difference was statistically significant (P < 0.05). There was no significant difference in fracture union time between the two groups (P > 0.05). At the last follow-up, there was no significant difference in range of motion or the Lysholm score between the two groups. There was no decrease in gastrocnemius muscle strength in the incision group.ConclusionsThe fixation of PCL tibial avulsion fractures with a homemade hook plate through an inverted L-shaped postero-medial approach is safe and effective. It showed almost the same satisfactory outcomes as arthroscopic Endobutton fixation.