Accuracy of Lower Limb Alignment in Patients with Total Knee Arthroplasty in Fajr Hospital, Tehran, 2008-2013

M. Shahrezaee¹, M. Jabalameli², A. Noori³*, S. R. Sharifzadeh¹, M. Setareh³, T. Mokhtari⁴ and F. Jafari⁵

¹Department of Orthopedic Surgery, AJA University of Medical Sciences, Tehran, Iran. ²Department of Orthopedic Surgery, Shafa Yahiaian Hospital, Iran University of Medical Sciences, Tehran, Iran. ³Department of Orthopedic Surgery, Mousavi Hospital, Zanjan University of Medical Sciences, Zanjan, Iran. ⁴School of Medicine, Tehran University of Medical Sciences, Tehran, Iran ⁵Zanjan University of Medical Sciences, Student’s Research Committee.

ABSTRACT: This study was designed to evaluate accuracy of lower limb alignment in patients with Total Knee Arthroplasty (TKA) in Fajr Hospital of Tehran in 2008 to 2013. All patients evaluated in the study had undergone TKA surgery during the years 2008 to 2013. A checklist was used to collect data. Evaluations for the angle between the femoral mechanical axis and the tibial mechanical axis and lower limb mechanical axis were calculated from X-rays of alignment taken before and after the surgery.Assessment for effects of the surgery were made according to Knee Society scores (KSS) taken before the operation and 12 months after the procedure. This study evaluated 102 patients within average age of. 65.79± 6.8 years. Fourteen patients were male and 88 were female. The mean for mechanical axis angle in the lower extremity was 1.54±2.94 in various, the mean for range of motion (ROM) was 112.07±18.75, the mean for flexion contracture (FC) was 2.42 ±3. 77 degrees.Results determined no significant difference between these angles in terms of sex, side of the defect and the type of surgery. The mean duration of hospitalization was reported as 8.5±3.46 days. KSS showed better results after TKA. The results showed that TKA, as a routine procedure in the treatment of the last stages of knee disorders as such as osteoarthritis, rheumatoid arthritis and the other defects can be useful and that factors such as sex, type of surgery and side of involvement made no difference in the results of TKA.

KEYWORDS: Total knee arthroplasty (TKA); radiographic alignment; Mechanical axis of the lower limb

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