The majority of adverse events associated with CNTKA were minor and comparable with those seen with conventional TKA .
Clinical outcomes were comparable between the two techniques , with longer-term follow-up suggesting that CNTKA provided no benefit over conventional TKA in terms of sustained functional improvements .
At present , it is unclear whether the significant improvements shown in radiological outcomes after CNTKA translate to measurable clinical benefits .
BACKGROUND Conventional total knee arthroplasty ( TKA ) and the more recently available computer-navigated total knee arthroplasty ( CNTKA ) use alternative methods to achieve correct limb alignment .
This systematic review was undertaken to assess the safety and effectiveness of CNTKA compared with conventional TKA .
Randomized trial of computer-assisted knee arthroplasty: impact on clinical and radiographic outcomes.
Computer-assisted surgery in knee arthroplasty is gaining popularity ; however , the result ing outcome improvement is controversial . A double-blinded trial was performed with subjects r and omized to undergo surgery with either computer-assisted or nonassisted instruments .  Postoperatively , limb and implant alignment and rotation were assessed using both full-length radiographs and computed tomography in addition to clinical scores . One hundred twenty patients ( 141 knees ) were r and omized . No differences in Western Ontario MacMaster Osteoarthritis Score , Short Form-36 , or flexion were seen . More varus limb alignment was seen in the computer-assisted group ( 1.9 ° ) vs the nonassisted group ( 0.9 ° , P = .04 ) with no improvement in alignment precision . Rotational alignment of the components did not differ between groups . Computer-assisted surgery appeared to have minimal effect on knee implant arthroplasty with no improvement in limb alignment or early functional outcome
The majority of adverse events associated with CNTKA were minor and comparable with those seen with conventional TKA .
Clinical outcomes were comparable between the two techniques , with longer-term follow-up suggesting that CNTKA provided no benefit over conventional TKA in terms of sustained functional improvements .
At present , it is unclear whether the significant improvements shown in radiological outcomes after CNTKA translate to measurable clinical benefits .
BACKGROUND Conventional total knee arthroplasty ( TKA ) and the more recently available computer-navigated total knee arthroplasty ( CNTKA ) use alternative methods to achieve correct limb alignment .
This systematic review was undertaken to assess the safety and effectiveness of CNTKA compared with conventional TKA .