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Original ArticleOpen Access
Comparative Study Between Computer Assisted-Navigation and Conventional Technique in Minimally Invasive Surgery Total Knee Arthroplasty, Prospective Control Study
Chotanaphuti T 
,
Ongnamthip P ,
Teeraleekul K ,
Kraturerk C
,
Ongnamthip P ,
Teeraleekul K ,
Kraturerk C Background: Both Minimally Invasive surgery (MIS) and Computer-Assisted Surgery (CAS) are useful in
Total Knee Arthroplasty (TKA). Minimally invasive total knee arthroplasty was associated with decreased
blood loss, shorter hospital stays, and increased range of motion. Computer-assisted surgery in total knee
arthroplasty was developed to improve the positioning of implants during surgery.
Objective: To evaluate radiographic results relative to component position and limb alignment when using a
navigation system compared with conventional technique in MIS-TKA.
Material and Method: A prospective control study was performed in 180 patients who underwent total knee
arthroplasty by one surgeon. All patients were randomly divided into two groups, Conventional and Navigation
TKA. Intra-, post-operative data, and postoperative limb alignment were recorded for comparison in both
groups.
Results: The postoperative mechanical axis was within 3° of neutral mechanical alignment in 94% of the
navigation group and 87% in conventional group (p = 0.13). Registration time of navigation group is 13.58
minutes. No statistical significant difference was found in tourniquet time and postoperative blood loss in
both groups.
Conclusion: The use of navigation in total knee arthroplasty increases accuracy in limb and implants alignment,
and does not increase complications and surgical times.
Keywords: Computer-assisted surgery, Minimally invasive surgery, Total knee arthroplasty
Total Knee Arthroplasty (TKA). Minimally invasive total knee arthroplasty was associated with decreased
blood loss, shorter hospital stays, and increased range of motion. Computer-assisted surgery in total knee
arthroplasty was developed to improve the positioning of implants during surgery.
Objective: To evaluate radiographic results relative to component position and limb alignment when using a
navigation system compared with conventional technique in MIS-TKA.
Material and Method: A prospective control study was performed in 180 patients who underwent total knee
arthroplasty by one surgeon. All patients were randomly divided into two groups, Conventional and Navigation
TKA. Intra-, post-operative data, and postoperative limb alignment were recorded for comparison in both
groups.
Results: The postoperative mechanical axis was within 3° of neutral mechanical alignment in 94% of the
navigation group and 87% in conventional group (p = 0.13). Registration time of navigation group is 13.58
minutes. No statistical significant difference was found in tourniquet time and postoperative blood loss in
both groups.
Conclusion: The use of navigation in total knee arthroplasty increases accuracy in limb and implants alignment,
and does not increase complications and surgical times.
Keywords: Computer-assisted surgery, Minimally invasive surgery, Total knee arthroplasty
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