The GEMINI SL Total Knee System is part of the LINK SL Knee Family concept. SL stands for “System-integrated soLution”:
- Extended compatibility of all prosthesis components.
- Implant system for primary and revision knee surgery.
Fixed Bearing CR
Fixed Bearing PS
Mobile Bearing
The GEMINI SL Total Knee System includes the following three configurations:
- Fixed Bearing CR (Cruciate Retaining).
- Fixed Bearing PS (Posterior Stabilized).
- Mobile Bearing.
Fixed Bearing CR
- Cruciate Retaining configuration for use with intact ligaments and capsule and adequate joint stability.
- Featuring extended trochlear groove.
- Same tibial component for Fixed Bearing CR and PS.
Fixed Bearing PS
- Posterior Stabilized configuration for use in the absence of posterior cruciate ligament (PCL) function.
- Providing reduced risk of dislocation and reduced contact pressure in deep flexion2.
- Featuring bone-preserving design with size-specific intercondylar femoral box dimensions.
Mobile Bearing
- Rotating platform configuration for use with or without posterior cruciate ligament.
- Highly congruent articulating surfaces that allow large tibio-femoral contact area throughout the entire range of motion, even with absent posterior cruciate ligament 3.
- Unique tibial locking mechanism providing reduced risk of tibial insert dislocation and large contact area with tibial baseplate.
The GEMINI SPAR-K Instruments meet the need of today's knee surgeons
The GEMINI SPAR-K Instruments
- are clear and easy to use
- are intuitive and efficient instruments.
- assure precise and reliable bone resectionsa
The instruments assure precise and reliable bone resections.a
For SPAR-K, all instruments have been completely redesigned to allow millimetre and degree precise adjustment. Nevertheless, they are very easy to use and enable a precisely reproducible surgical technique.
The colour coded actuators, the quick set/release functions and the single layer trays, allows for:
- A potential reduction of the learning curve
- Reduced effort throughout the surgical process for both surgeon and scrub-tech
Surgical technique
LINK PorEx Technology
- TiNbN = Titanium Niobium Nitride Surface Modification resulting in a ceramic-like surface, which significantly reduces cobalt, chromium and nickel ion release4.
- Extremely hard surface with abrasion properties similar to those of ceramics.
- Larger wetting angle of the surface gives it a low friction coe fficient when in contact with synovial fluid3.
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Related products
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Sources
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- Internal data - H. Thabe, „Aspekte zum Konzept der beweglichen Tibiaplateaukonstruktion, April 2000.
- J. Goodfellow, “The Mechanics of the Knee and Prosthesis Design”. J Bone Joint Surg Br 1978; 60:358-369
- ripo.cineca.it/pdf/relazione_2016_v19_inglese.pdf
- Internal data - H. Thabe, “ Arthroprometic sizing in TKA / GEMINI MK2”
- P.S. Walker, “A Comparative Study of Uncemented Tibial Components”. J Arthroplasty 1990; 5:245-253
- A. Completo et al., “The influence of different tibial stem designs in load sharing and stability at the cement-bone interface in revision TKA”. Knee 2008;15:227-232
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- B. Innocenti, GEMINI SL Mobile Bearing / Fixed Bearing CR Biomechanical analysis in healthy and deficient PCL patient LINK 999_WP_003_2017_Gemini-SL_en, 2017
- J. Callaghan, “Mobile-Bearing Knee Replacement: Concept and Results”. AAOS Instructional Course Lectures 2001; 50:431-449
- D. Dennis, “Mobile Bearing Total Knee Arthroplasty Design Factors in Minimizing Wear”. Clin Orthop Relat Res. 2006; 452:70-77
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- B. Innocenti, GEMINI SL Fixed Bearing PS: Biomechanical Analysis of the Post-Cam System. LINK 999_WP_002_2017_Gemini-SL_en, 2019
- Internal technical report: Study of the influence of TiNbN-coating on the ion release of CrCrMo-alloys in SBF buffer simulator testing.
- GR Scuderi, WN Scott, “Total Knee Arthroplasty. What we have learned.”1996; Am J Knee Surg 9:73-75
- S. M. Kurtz, „The Origins and Adaptations of UHMWPE for Knee Replacement“, in UHMWPE Biomaterials Handbook, S. M. Kurtz, Ed., Burlington, MA Academic Press 2009.
- S. M. Kurtz, „Advances in the Processing, Sterilization, and Crosslinking of Ultra-high Molecular Weight Polyethylene for Total Joint Arthroplasty“, Biomaterials 1999; 20:1659-1687.
- E. M. Brach del Prever, „UHMWPE for Arthroplasty: Past or Future?“, J Orthopaed Traumatol 2009; 10:1-8
- Produktakte W. LINK (Quadrant, MediTECH Data Sheet)
- E. Oral, „Characterization of Irradiated Blends of Alpha-tocopherol and UHMWPE“, Biomaterials 2005; 26(33):6657-6663.
- E. Oral, „Highly Crosslinked UHMWPE Doped with Vitamin E“, in UHMWPE Biomaterials Handbook, S. M. Kurtz, Ed., Burlington, MA Academic Press 2009.
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- S. M. Kurtz, „Trace Concentration of Vitamin E Protect Radiation Crosslinked UHMWPE from Oxidative Degradation“, J Biomed Mater Res A 2008; 549-563
- B. Innocenti, Biomechanical analysis of GEMINI SL total knee replacement implant designs up to 155° of flexion. LINK 999_WP_001_2017_Gemini-SL_en, 2019