Detail Views

  • STAG Block web V2
  • STAG Rod web V2
  • STAG Wing web V2


The Sulcus Line Trochlear Alignment Guide (STAG) helps reduce femoral malrotation by improving the accuracy of Whiteside's Line. The STAG:

  • Makes it easier to accurately combine landmarks such as the posterior condylar axis with the sulcus line
  • Reduces parallax errors
  • Is compatible with all knee systems
  • Is simple and easy to use
  • Patented design (PCT/AU2014/050220)


  1. Talbot S, Dimitriou P, Radic R, Zordan R, Bartlett J (2015) The sulcus line of the trochlear groove is more accurate than Whiteside’s Line in determining femoral component rotation. Knee Surg Sports Traumatol Arthrosc 23 (11):3306-3316. doi:10.1007/s00167-014-3137-8
  2. Talbot S, Dimitriou P, Mullen M, Bartlett J (2015) Referencing the sulcus line of the trochlear groove and removing intraoperative parallax errors improve femoral component rotation in total knee arthroplasty. Knee Surg Sports Traumatol Arthrosc:1-8. doi:10.1007/s00167-015-3668-7
  3. Chao TW, Geraghty L, Dimitriou P, Talbot S (2017) Averaging rotational landmarks during total knee arthroplasty reduces component malrotation caused by femoral asymmetry. J Orthop Surg Res 12: 74. doi:10.1186/s13018-017-0575-2
  4. Talbot S, Chao TW, Geraghty L (2016) Combining the Sulcus Line and Posterior Condylar Axis Reduces Femoral Malrotation in Total Knee Arthroplasty. Orthopaedic Journal of Sports Medicine 4 (1 suppl):2325967116S2325900015