Abstract
Objectives
Verify whether the previously planned correction with osteotomy was achieved and, in cases with hinge fracture, whether the accuracy of the correction was affected. In addition, identify the fracture characteristics responsible for inaccurate repair, including the type of fracture and the location of the hinge
Methods
Retrospective evaluation of patients who underwent tibial osteotomy with medial opening wedge and fixation with locking plate. The sample size was based on other similar studies available in the literature. After applying the exclusion and inclusion criteria, data from 47 participants were used. The research participants underwent the same surgical procedure, divided into two groups: patients without lateral cortical fracture and patients with fractures. Patients with fractures were compared to patients without fractures in terms of the statistical difference in the axis of correction of lower limb alignment.
Results
In the preoperative period, the following measurements were evaluated: Tibiofemoral Angle, Tibial Slope, mPtA (Medial Proximal Tibial Angle), Joint Obliquity (JLCA). In the immediate postoperative period: Tibiofemoral angle, tibial slope, mPtA, joint obliquity. In the late postoperative period: Tibiofemoral Angle, Tibial Slope, mPtA, Joint Obliquity, MAD (Mechanical Axis Deviation) and correction achieved between groups. There was no statistical difference between the groups in the preoperative, immediate postoperative and late postoperative periods.
Conclusion
No statistical differences were found between the group with and without lateral cortical fracture. We conclude that lateral cortical fracture does not cause loss of alignment correction as long as a rigid fixation method is used.