Precision implementation

Addressing instability through instrumentation

  • Medial referencing rotational guide
  • Restoring MCL isometry through joint-line preservation
  • Stability throughout the complete range of motion


Personalised alignment

Optimising implant position for each and every patient

  • Ligament balancing in flexion and extension
  • ‘Anatomic’ alignment principles
  • Minimising soft tissue releases in TKR

Proven design

Evolving the single radius to balance the knee

  • Single radius femoral design(1,2,3)
  • Anatomic lateralised patella track
  • Difficult primary stem extension option

Unity Knee implant


  1. Wang H, Simpson KJ, Ferrara MS, Chamnongkich S, Kinsey T, Mahoney OM. Biomechanical Differences Exhibited During Sit-To-Stand Between Total Knee Arthroplasty Designs of Varying Radii. J Arthroplasty. 2006; 21 (8): 1193-1199.
  2. Hall J, Copp SN, Adelson WS, D'Lima DD, Colwell CW. Extensor Mechanism Function in Single-Radius Vs Multiradius Femoral Components for Total Knee Arthroplasty. J Arthroplasty 2008; 23 (2): 216-21.
  3. D'Lima DD, Poole C, Chadha H, Hermida JC, Mahar A, Colwell CW. Quadriceps Moment Arm and Quadriceps Forces After Total Knee Arthroplasty. CORR 2001; 392: 213-220.

Important: Not all products are available or cleared for distribution in all international markets. For more details please contact us.


Product Videos

  • CR Procedure

    Watch CR Procedure

  • Product Overview

    Watch Product Overview

  • Ligament Balancing

    Watch Ligament Balancing

  • Medial Referencing

    Watch Medial Referencing

  • Dr Raterman Unity CR

    Watch Dr Raterman Unity CR

  • Nicholas Day’s patient story

    Watch Nicholas Day’s patient story

Product Information

  • Technical Summary

    Technical Summary

  • Product Overview

    Product Overview

  • Ligament Balancing Surgical Technique

    Ligament Balancing Surgical Technique

  • Measured Resection Surgical Technique

    Measured Resection Surgical Technique

  • Your knee - A guide for patients

    Your knee - A guide for patients

  • Instructions for use

    Instructions for use