Flyer, EN
Twinsys cemented
Stem system.
Same instrumentation for implantation of the cemented and uncemented stems
Triply conical design with thin cement mantle to minimise the risk of subsidence [1, 2, 3]
Highly polished surface to reduce micro-movements and friction between implant and cement [2, 3]
About
The basic design of the twinSys stem system is based on the straight-stem prosthesis concept by Prof. Maurice E. Müller. The twinSys system has been distributed since 2003 with the aim of enabling surgeons to perform cemented and uncemented implan-tation with a single instrumentation.
The cemented twinSys stem is a straight monoblock prosthesis available in both Standard and Lateral versions. In relation to the rasp, the stem is under-dimensioned by 1 mm per side, offering sufficient space for a homogenous cement mantle.
The rounded, rectangular cross-section gives the implant its stability against rotational forces acting on it. According to the French philosophy of combining a highly polished stem with a thin cement mantle («composite beam»), no centring aid is necessary [1, 2].
The triply conical stem geometry transforms the shear forces into compressive forces and allows wedging of the stem in the cement mantle, thereby minimising the risk of postoperative subsidence [3]. By absorbing micro-movements between the implant and the cement mantle, the highly polished surface reduces the risk of prosthesis loosening [1, 2].
- 7 A* ODEP rating [4]
eIFU-Mathys and further documents available here
[1] Skinner, J.A., et al., Should the cement mantle around the femoral component be thick or thin? J Bone Joint Surg Br, 2003. 85(1): p. 45-51.
[2] Scheerlinck T.; Casteleyn P.-P.; The design features of cemented femoral hip implants; J Bone Joint Surg [Br] 2006;88-B:1409-18.
[3] Siepen W., et al. Prospective two-year subsidence analysis of 100 cemented polished straight stems – a short-term clinical and radiological observation. BMC Musculoskelet Disord, 2016. 17(1): p. 395.
[4] The most recent ODEP rating can be downloaded from www.odep.org.uk.
Resources
Product manufactured by Mathys Ltd Bettlach.
Please note that not all products are compatible with each other. Please refer to IFU for further indications.
Please note that not all products are available and registered in every market. Please contact your Enovis’ Sales Representative for any further information.
Mathys Ltd Bettlach and Limacorporate S.p.A. are affiliates of Enovis Corporation.
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