Does the severity of preoperative varus deformity influence postoperative alignment in both conventional and computer-assisted total knee arthroplasty?

作者：Bae Dae Kyung; Song Sang Jun^*; Heo Dong Beom; Tak Dae Hyun

来源：Knee Surgery, Sports Traumatology, Arthroscopy, 2013, 21(10): 2248-2254.

DOI：10.1007/s00167-012-2263-4

• Knee
• Total knee arthroplasty
• Navigation

The postoperative alignment was compared according to the severity of preoperative varus deformity in computer-assisted and conventional total knee arthroplasty (CAS-TKA). %26lt;br%26gt;The study reviewed 127 consecutive CAS-TKA and 236 conventional TKA, retrospectively. In CAS-TKA, 77 knees with a varus deformity a parts per thousand currency sign15.0A degrees were classified in group CAS-A and 50 knees with a varus deformity %26gt; 15.0A degrees were classified in group CAS-B. In conventional groups, 204 knees with a varus deformity a parts per thousand currency sign15.0 were classified in group Conventional-A and 32 knees with a varus deformity %26gt; 15.0A degrees were classified in group Conventional-B. The postoperative mechanical axis (MA) was compared among groups CAS-A, CAS-B, Conventional-A and Conventional-B. %26lt;br%26gt;The average postoperative MA was 0.7A degrees varus in group CAS-A, 2.8A degrees varus in group CAS-B, 1.1A degrees varus in group Conventional-A and 3.2A degrees varus in group Conventional-B (p %26lt; 0.001). The postoperative MA was within 3A degrees in 81.8, 62.0, 58.8 and 37.5 % of group CAS-A, CAS-B, Conventional-A and Conventional-B, respectively. %26lt;br%26gt;The severity of preoperative varus deformity influences postoperative alignment despite using CAS. More careful correction of the alignment is required, especially in TKA performed on patients with a greater varus deformity. %26lt;br%26gt;III.

• 出版日期2013-10