Rotaglide+
Total Knee System
Inspired by motion
Recent kinematic studies have suggested that the natural femur may pivot medially or laterally during gait and non-ambulatory activities(1,2). The symmetrical design of the Rotaglide+ insert allows up to 5mm translation and ±20° rotation, accommodating varying centres of rotation about both the medial and lateral femoral condyles. Bearing mobility also allows self-alignment of the tibial insert in vivo which has been shown to reduce patello femoral stresses(3)and minimise anterior knee pain(4).
With the patient in mind
A 10° posterior slope built into the distal femoral and tibial implant design allows for proximal bone conservation. The anatomic tibial slope directs forces through the tibial baseplate during heel-strike, minimising the risk of bearing dislocation. A posteriorly located centre of rotation lengthens the quadriceps moment arm, reducing quadriceps effort required post total knee arthroplasty which may facilitate patient rehabilitation(5,6).
Demonstrated clinical results
The bone conserving implant design is ideally suited for the young, active patient: Rotaglide+ mobile bearing has shown an excellent clinical survivorship of 96% in patients with an average age of 50 years(7). 
A flexible system approach
The Rotaglide+ allows intra-operative flexibility. Both mobile and fixed bearing options are compatible with a universal femoral component and tibial baseplate. For the fixed bearing derivative, the bearing simply snaps into place.
References:
1. Koo S, Andriacchi TP. The knee joint center of rotation is predominantly on the lateral side during normal walking. J Biomech 2008;41(6):1269-73.
2. Hill PF, Vedi V, Williams A, Iwaki H, Pinskerova V, Freeman MAR. Tibiofemoral movement 2: the loaded and unloaded living knee studied by MRI. J Bone Joint Surg [Br] 2000;82-B:1196-8.
3. Skwara A, Tibesku CO, Ostermeier S, Stukenborg-Colsman C, Fuchs-Winkelmann S. Differences in patellofemoral contact stresses between mobile-bearing and fixedbearing total knee arthroplasties: a dynamic in vitro measurement. Arch Orthop Trauma Surg 2008 Sep;30.
4. Breugem SJ, Sierevelt IN, Schafroth MU, Blankevoort L, Schaap GR, van Dijk CN. Less anterior knee pain with a mobile-bearing prosthesis compared with a fixed bearing prosthesis. Clin Orthop Relat Res 2008 Aug;466(8):1959-65.
5. Mahoney OM, McClung CD, dela Rosa MA, Schmalzried TP. The effect of total knee arthroplasty design on extensor mechanism function. J Arthroplasty 2002 Jun;17(4):416-21.
6. 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 Dec;21(8):1193-9.
7.Morgan M, Brooks S, Nelson RA. Total knee arthroplasty in young active patients using a highly congruent fully mobile prosthesis. J Arthroplasty 2007 Jun; 22(4):525-530.
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