caa a22 4500 605457441 CHVBK 20210128100223.0 cr unu---uuuuu 210128e20151201xx s 000 0 eng 10.1007/s00167-014-3226-8 doi (NATIONALLICENCE)springer-10.1007/s00167-014-3226-8 Radiological outcomes of pinless navigation in total knee arthroplasty: a randomized controlled trial [Elektronische Daten] [Jerry Chen, Pak Chin, Zongxian Li, Andy Yew, Darren Tay, Shi-Lu Chia, Ngai Lo, Seng Yeo] Purpose: This study aimed to investigate the accuracy of pinless navigation (BrainLAB® VectorVision® Knee 2.5 Navigation System) as an intra-operative alignment guide in total knee arthroplasty (TKA). The authors hypothesized that pinless navigation would reduce the proportion of outliers in conventional TKA, without a significant increase in the duration of surgery. Methods: Between 2011 and 2012, 100 patients scheduled for a unilateral primary TKA were randomized into two groups: pinless navigation and conventional surgery. All TKAs were performed with the surgical aim of achieving neutral coronal alignment with a 180° mechanical axis. The primary outcomes of this study were post-operative radiographic assessment of lower limb alignment using hip-knee-ankle angle (HKA) and components placement using coronal femoral-component angle (CFA) and coronal tibia-component angle (CTA). Results: There was a smaller proportion of outliers for HKA, CFA and CTA at 10, 2 and 2% respectively, in the pinless navigation group, compared to 32, 16 and 16%, respectively, in the conventional group (p=0.013, p=0.032 and p=0.032, respectively). The mean CFA was also more accurate at 90° in the pinless navigation group compared to 91° in the conventional group (p=0.002). There was no difference in the duration of surgery between the two groups (n.s.). Conclusions: Pinless navigation improves lower limb alignment and components placement without a significant increase in the duration of surgery. The authors recommend the use of pinless navigation to verify the coronal alignments of conventional cutting blocks in TKA before the bone cuts are made. Level of evidence: I. Springer-Verlag Berlin Heidelberg, 2014 Pinless navigation nationallicence Total knee arthroplasty nationallicence Mechanical axis nationallicence Components placement nationallicence Chen Jerry Department of Orthopaedic Surgery, Singapore General Hospital, Outram Road, Academia Building Level 4, 119228, Singapore, Singapore aut Chin Pak Department of Orthopaedic Surgery, Singapore General Hospital, Outram Road, Academia Building Level 4, 119228, Singapore, Singapore aut Li Zongxian Department of Orthopaedic Surgery, Singapore General Hospital, Outram Road, Academia Building Level 4, 119228, Singapore, Singapore aut Yew Andy Department of Orthopaedic Surgery, Singapore General Hospital, Outram Road, Academia Building Level 4, 119228, Singapore, Singapore aut Tay Darren Department of Orthopaedic Surgery, Singapore General Hospital, Outram Road, Academia Building Level 4, 119228, Singapore, Singapore aut Chia Shi-Lu Department of Orthopaedic Surgery, Singapore General Hospital, Outram Road, Academia Building Level 4, 119228, Singapore, Singapore aut Lo Ngai Department of Orthopaedic Surgery, Singapore General Hospital, Outram Road, Academia Building Level 4, 119228, Singapore, Singapore aut Yeo Seng Department of Orthopaedic Surgery, Singapore General Hospital, Outram Road, Academia Building Level 4, 119228, Singapore, Singapore aut Knee Surgery, Sports Traumatology, Arthroscopy Springer Berlin Heidelberg 23/12(2015-12-01), 3556-3562 0942-2056 23:12<3556 2015 23 167 https://doi.org/10.1007/s00167-014-3226-8 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00167-014-3226-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Chen Jerry Department of Orthopaedic Surgery, Singapore General Hospital, Outram Road, Academia Building Level 4, 119228, Singapore, Singapore aut NATIONALLICENCE 700 1- Chin Pak Department of Orthopaedic Surgery, Singapore General Hospital, Outram Road, Academia Building Level 4, 119228, Singapore, Singapore aut NATIONALLICENCE 700 1- Li Zongxian Department of Orthopaedic Surgery, Singapore General Hospital, Outram Road, Academia Building Level 4, 119228, Singapore, Singapore aut NATIONALLICENCE 700 1- Yew Andy Department of Orthopaedic Surgery, Singapore General Hospital, Outram Road, Academia Building Level 4, 119228, Singapore, Singapore aut NATIONALLICENCE 700 1- Tay Darren Department of Orthopaedic Surgery, Singapore General Hospital, Outram Road, Academia Building Level 4, 119228, Singapore, Singapore aut NATIONALLICENCE 700 1- Chia Shi-Lu Department of Orthopaedic Surgery, Singapore General Hospital, Outram Road, Academia Building Level 4, 119228, Singapore, Singapore aut NATIONALLICENCE 700 1- Lo Ngai Department of Orthopaedic Surgery, Singapore General Hospital, Outram Road, Academia Building Level 4, 119228, Singapore, Singapore aut NATIONALLICENCE 700 1- Yeo Seng Department of Orthopaedic Surgery, Singapore General Hospital, Outram Road, Academia Building Level 4, 119228, Singapore, Singapore aut NATIONALLICENCE 773 0- Knee Surgery, Sports Traumatology, Arthroscopy Springer Berlin Heidelberg 23/12(2015-12-01), 3556-3562 0942-2056 23:12<3556 2015 23 167