Comparison of Clinical, Functional, and Radiological Outcomes of Total Knee Arthroplasty Using Conventional and Patient-Specific Instrumentation.

Background: Recently, patient-specific instrumentation (PSI) systems have been developed in order to increase the accuracy of component positioning during total knee arthroplasty (TKA); however, the findings of previous studies are controversial in this regard. In the current randomized clinical study, the outcomes of computer tomography (CT)-based PS (patient specific)-guided TKA were compared to the results of conventional instrumentation (CVI) TKA. The guides were designed on the basis of distal femoral and proximal tibial pin orientation of the conventional related guides.

Diagnostic Value of Ischial Spine Sign in Patients with Acetabular Retroversion.

Background: Acetabular Retroversion (AR) is a hip disorder and one of the causes of pain in this area. Evaluation of positive Cross Over Sign (COS) on AP X-Rays of the hip is currently the best method of diagnosis of AR. Several studies have measured co-existence of Ischial Spine Sign (ISS) in patients with AR.

Effects of Hip Geometry on Fracture Patterns of Proximal Femur.

Background: Some studies have previously shown that geometry of proximal femur can affect the probability of fracture and type of fracture. It happens since the geometry of the proximal femur determines how a force is applied to its different parts. In this study, we have compared proximal femur's geometric characteristics in femoral neck (FNF), intertrochanteric (ITF) and Subtrochanteric (STF) fractures.

Supracondylar Osteotomy in Valgus Knee: Angle Blade Plate Versus Locking Compression Plate.

Background: There are few studies comparing the biomechanical properties of angled blade plate and locking compression plates in supracondylar osteotomy. In the current randomized study, we prospectively compared the clinical and radiological outcomes of supracondylar osteotomy using these two plates.

Methods: Forty patients with valgus knee malalignment were randomly assigned to two equal numbered groups: angled blade plate and locking compression plates.