The effect of postoperative radiological alignment differences on the clinical and functional evaluations of patients undergoing knee prosthesis

Gonarthrosis is a pathology that causes pain, limitation of movement, deformity, decrease in muscle strength, decrease in proprioception, and decrease in quality of life. It is a major public health problem especially in the population over 55 years of age. Gonarthrosis causes disability especially in the population over 55 years of age. Because of this, it is emphasized that the treatment of the disease increasingly becoming more important and precautions should be taken. It is more likely to be seen in recent years because of obesity and long life time. Due to reasons such as increasing the frequency of predisposing factors, and this increase is expected to continue. Current and recent treatment option is total knee arthroplasty surgery (TKA) for gonarthrosis treatment. We studied patients who had undergone total knee prosthesis formation of primary gonarthrosis between 2000-2014 in Dokuz Eylül University Hospital Orthopedics and Traumatology Department. 149 patients were included in the study. HSS score, VAS score and 30-second walking test, 50-step walking test, and 11-step ladder tests were tested. At the same time, we evaluated the relation between the radiographic alignment differences and the range of flexion motion. We also looked at the relationship between the radiological alignment differences between metaphysical lysis formation and revision necessity. As a result of our study, it was seen that the postoperative radiological alignment differences (anatomical alignment, coronal and sagittal alignment of tibial stem, sagittal alignment of femoral stem) did not make a statistically significant difference on the mentioned quality of life scores and function evaluations. When metaphyseal lysis and revision requirements were evaluated, we could see that postoperative residual varus and neutral alignment did not show any significant difference with each other. In conclusion, we observed that there was no significant clinical difference in the radiological alignment differences in the patients on postoperative TKA. Key words: Gonarthrosis, total knee prosthesis, anatomic axis, tibial inclination, functional evaluation.