title: Early experiences with robot-assisted total knee arthroplasty using the DigiMatch™ ROBODOC® surgical system.
abstract: BACKGROUND
  The use of robotics in total knee arthroplasty (TKA) has been shown to minimise human error, as well as improve the accuracy and precision of component implantation and mechanical axis alignment. The present study aimed to demonstrate that robot-assisted TKA using ROBODOC® is safe and capable of producing a consistent and accurate postoperative mechanical axis.
  
  
  METHODS
  We prospectively recruited 27 consecutive patients who underwent robot-assisted TKA between May and December 2012. Two patients were excluded from the study due to intraoperative technical problems with the robot. Long-leg radiography and computed tomography were performed prior to surgery, and used for mechanical axis measurements and component sizing. DigiMatch™ ROBODOC® Surgical System software version 4.3.6 (Curexo Technology Corp, Fremont, CA, USA) was used in all cases to perform bone cuts in accordance with the preoperative plan.
  
  
  RESULTS
  The postoperative coronal mechanical alignment was within 3 degrees, with a mean alignment of -0.4 ± 1.7 degrees, confirming the accuracy of the preoperative surgical plan and bone cuts. The mean operating time was 96 ± 15 min, and preoperative planning yielded 100% implant sizing accuracy.
  
  
  CONCLUSIONS
  Robotics has the potential to enable surgeons to consistently attain ideal postoperative alignment. The use of bone movement monitors and an integrated navigation system enhances the safety profile of ROBODOC® by minimising errors. However, the role of the surgeon in TKA is still vital, as the surgeon is ultimately in charge of planning the surgery, its execution and ensuring soft tissue balance during TKA.
authors: Department of Orthopaedic Surgery, Singapore General Hospital, 20 College Road, Academia Level 4, Singapore 169865. lincoln.liow.m.h@sgh.com.sg.
authors: Ming Han Lincoln
authors: MH
authors: Liow
authors: Pak Lin
authors: PL
authors: Chin
authors: Keng Jin Darren
authors: KJ
authors: Tay
authors: Shi Lu
authors: SL
authors: Chia
authors: Ngai Nung
authors: NN
authors: Lo
authors: Seng Jin
authors: SJ
authors: Yeo
mesh_terms: D000368:Aged; D019645:Arthroplasty, Replacement, Knee / Q000295:instrumentation*; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D065287:Robotic Surgical Procedures / Q000295:instrumentation*; D013977:Tibia / Q000601:surgery; D014057:Tomography, X-Ray Computed
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