Mechanically aligned total knee arthroplasty (TKA) for valgus knee is considered a “challenging surgery.” Recently, the kinematic alignment (KA) method has gained attention. This study aimed to present objective cli...Mechanically aligned total knee arthroplasty (TKA) for valgus knee is considered a “challenging surgery.” Recently, the kinematic alignment (KA) method has gained attention. This study aimed to present objective clinical data, such as intraoperative balance assessment and radiographic evaluation of postoperative lower extremity alignment after TKA using the KA method for valgus deformity. Twenty-one TKA knees (mean age, 74 years;2 males, 19 females) with KA for severe valgus deformity (hip-knee-ankle-angle ≥ 10°) performed at our department in the past 3 years were included in this study. Intraoperative gap and balance measurements and postoperative radiographic evaluation were performed. A total arc of range of motion was achieved up to 98% of preoperative values at 3 weeks postoperatively. Intraoperative gap and balance were stable throughout the entire range of motion. In addition, there were no statistically significant differences in either balance or gap values at each flexion angle. KA TKA is a “simple surgery” rather than a “challenging surgery” because additional soft tissue procedures are not required, operative time is short, intraoperative and postoperative balance is very stable, and a good alignment is achieved. This procedure may relieve surgeons of the stress of TKA for valgus deformities.展开更多
<b><span style="font-family:Verdana;">Background: </span></b><span style="font-family:Verdana;">The number of total knee arthroplasty (TKA) surgeries performed each ye...<b><span style="font-family:Verdana;">Background: </span></b><span style="font-family:Verdana;">The number of total knee arthroplasty (TKA) surgeries performed each year is increasing worldwide and mechanical alignment (MA) is currently seen as the gold standard procedure. However, taking neutral alignment as the universal goal may be mistaken. In our hospital, we currently conduct kinematically aligned TKA (KA-TKA). Three different types of implants are used</span><span style="font-family:Verdana;">:</span><span style="font-family:;" "=""><span style="font-family:Verdana;"> the cruciate-retaining (CR) type, cruciate-sacrificing (CS) type, or bi-cruciate-retained (BCR) type. We aimed to compare the coronal alignment observed following KA-TKA and MA-TKA and in normal knees, as well as that achieved with different types of implants. </span><b><span style="font-family:Verdana;">Methods:</span></b><span style="font-family:Verdana;"> The study comprised 206 knees of Japanese patients who underwent KA-TKA using varying implants in our Hospital between May 2019 and April 2020. Measurements of pre- and postoperative coronal alignment were determined from weight-bearing full-leg standing radiographs. The postoperative results were </span><span style="font-family:Verdana;">compared to measurements taken from patients who underwent MA-TKA (</span><span style="font-family:Verdana;">N = 96) and normal knees (N = 60). </span><b><span style="font-family:Verdana;">Results: </span></b><span style="font-family:Verdana;">No significant differences between the KA-TKA group and normal knees were found for the medial proximal tibial angle (MPTA) (–4.2<span style="white-space:nowrap;">°</span> </span></span><span style="font-family:;" "=""><span style="font-family:Verdana;">±</span><span style="font-family:Verdana;"> 2.6<span style="white-space:nowrap;">°</span> vs –3.8<span style="white-space:nowrap;">°</span> </span><span style="font-family:Verdana;">±</span><span style="font-family:Verdana;"> 2.5<span style="white展开更多
文摘Mechanically aligned total knee arthroplasty (TKA) for valgus knee is considered a “challenging surgery.” Recently, the kinematic alignment (KA) method has gained attention. This study aimed to present objective clinical data, such as intraoperative balance assessment and radiographic evaluation of postoperative lower extremity alignment after TKA using the KA method for valgus deformity. Twenty-one TKA knees (mean age, 74 years;2 males, 19 females) with KA for severe valgus deformity (hip-knee-ankle-angle ≥ 10°) performed at our department in the past 3 years were included in this study. Intraoperative gap and balance measurements and postoperative radiographic evaluation were performed. A total arc of range of motion was achieved up to 98% of preoperative values at 3 weeks postoperatively. Intraoperative gap and balance were stable throughout the entire range of motion. In addition, there were no statistically significant differences in either balance or gap values at each flexion angle. KA TKA is a “simple surgery” rather than a “challenging surgery” because additional soft tissue procedures are not required, operative time is short, intraoperative and postoperative balance is very stable, and a good alignment is achieved. This procedure may relieve surgeons of the stress of TKA for valgus deformities.
文摘<b><span style="font-family:Verdana;">Background: </span></b><span style="font-family:Verdana;">The number of total knee arthroplasty (TKA) surgeries performed each year is increasing worldwide and mechanical alignment (MA) is currently seen as the gold standard procedure. However, taking neutral alignment as the universal goal may be mistaken. In our hospital, we currently conduct kinematically aligned TKA (KA-TKA). Three different types of implants are used</span><span style="font-family:Verdana;">:</span><span style="font-family:;" "=""><span style="font-family:Verdana;"> the cruciate-retaining (CR) type, cruciate-sacrificing (CS) type, or bi-cruciate-retained (BCR) type. We aimed to compare the coronal alignment observed following KA-TKA and MA-TKA and in normal knees, as well as that achieved with different types of implants. </span><b><span style="font-family:Verdana;">Methods:</span></b><span style="font-family:Verdana;"> The study comprised 206 knees of Japanese patients who underwent KA-TKA using varying implants in our Hospital between May 2019 and April 2020. Measurements of pre- and postoperative coronal alignment were determined from weight-bearing full-leg standing radiographs. The postoperative results were </span><span style="font-family:Verdana;">compared to measurements taken from patients who underwent MA-TKA (</span><span style="font-family:Verdana;">N = 96) and normal knees (N = 60). </span><b><span style="font-family:Verdana;">Results: </span></b><span style="font-family:Verdana;">No significant differences between the KA-TKA group and normal knees were found for the medial proximal tibial angle (MPTA) (–4.2<span style="white-space:nowrap;">°</span> </span></span><span style="font-family:;" "=""><span style="font-family:Verdana;">±</span><span style="font-family:Verdana;"> 2.6<span style="white-space:nowrap;">°</span> vs –3.8<span style="white-space:nowrap;">°</span> </span><span style="font-family:Verdana;">±</span><span style="font-family:Verdana;"> 2.5<span style="white
