Cementless Tapered Femoral Stem Product overview

Designed for patient fit Proximally coated tapered wedge designs have been shown to be an effective treatment for end-stage osteoarthritis1,2,3, and have demonstrated excellent long-term clinical results both in published literature and global registry data4,5,6,7. The TriFit TS™ stem system has been designed by a global surgeon development team to build on the successful clinical heritage of the TriFit™ tapered stem, and to address modern day clinical problems to provide a patient matched solution.

Conformity | Stability | Versatility Responsible Innovation

Challenging demographics Patient demographics are changing. Whilst we are seeing an ageing population overall, those seeking surgical interventions are often younger, more active and more demanding than ever before8. In addition, increasing levels of obesity seen in many sectors of society also mean that patients are placing ever more demand on their hip prostheses9. A consequence of this evolving landscape is the increasing potential for patients to require a revision surgery in the second to fourth decade following a total hip replacement. Key considerations for contemporary hip replacement...

Conformity Optimal implant geometry defined by global CT data10 for a patient matched solution Stability Optimised proximal-to-distal ratio and proximal flare designed for immediate and effective stability Versatility Suitable for minimally invasive surgical approaches for anatomy preservation and compatible with Trinity™ advanced bearing acetabular system Responsible Innovation

Conformity The TriFit TS™ stem is based on a clinically proven bi-planar wedge4,5,6,7. However, many tapered wedge designs simply shorten an existing stem, which are not anatomically designed, have an inadequate CCD and distal fit and have been shown to migrate early11,12. Anatomical design Extensive global CT data has been used in the development of TriFit TS™ to define the geometry including stem length, size range, offsets and optimal CCD angle, designed to enhance patient fit. The TriFit TS™ stem therefore has a fixed neck length which, combined with the anatomical CCD angle of 127°, allows...

Size range Restoration of the centre of rotation and biomechanics of differing patient anatomies is facilitated via a comprehensive suite of sizes, whilst small increments and two offset options (standard and lateralised) ensure a seamless range. standard offset medial stem length (mm) lateral stem length (mm) Standard offset Lateral offset neck length lateral stem length medial stem length offset neck length (mm) (mm) offset neck length (mm) (mm) Progressive size increments with direct lateralisation to optimise soft tissue tension Responsible Innovation

Stability The proximal-to-distal ratio, distal sweep and proximal flare are designed to promote proximal loading and prevent distal hang-up, which may reduce the risk of subsidence as seen with other stems of this philosophy11,12. TriFit TS™ is manufactured from forged titanium alloy for strength and biocompatibility. Distally the stem is polished to help prevent osteointegration by transferring load proximally. Pure titanium is vacuum plasma sprayed over the proximal portion, which is then overlaid with 20μm of BONIT® coating. Primary stability Axial stability ■■ Anterior-posterior dual taper...

Secondary stability BONIT® advanced coating technology ■■ Cementless coating with more than 15 years’ clinical history13,14 Calcium phosphate (CaP) coating with a microcrystalline structure Maintains substrate surface roughness, providing a large area for osseointegration15,16 Biphasic 60% porous composition Room temperature electrolytic deposition process results in formation of a 20µm thin, needle-like, microcrystalline coating (brushite) similar in morphology to natural bone tissue Responsible Innovation

Versatility Preserving anatomy Advanced instrumentation Bearing options TriFit TS™ is designed to preserve the natural anatomy. A reduced lateral proximal shoulder helps preserve as much of the greater trochanter as possible, whilst the distal portion similarly helps to minimise the amount of cancellous bone removed from the femur. TriFit TS™ stem is a ‘rasp only’ stem philosophy that does not require distal reaming. It has been designed to work with the surgeon’s preferred approach, with lightweight compact and modular instrumentation that offers the surgeon a range of approach-specific options....

Patient matched solutions TriFit TS™ is part of Corin's hip continuum of care, providing solutions for a wide range of patient indications ODEP rating ODEP rating ODEP rating Responsible Innovation

References: 1. Healy WL, Tilzey JF, Iorio R, Specht LM, Sharma S. Prospective, randomized comparison of cobalt-chrome and titanium trilock femoral stems. The Journal of Arthroplasty 2009;24(6):831-836. 2. Meding JB, Galley, MR, Ritter MA. High survival of uncemented proximally porouscoated titanium alloy femoral stems in osteoporotic bone. Clinical Orthopaedics and Related Research 2010;468:441–447. 3. Lachiewicz PF, Soileau ES, Bryant P. Second-generation proximally coated titanium femoral component: Minimum 7-year results. Clinical Orthopaedics and Related Research 2007;465:117-121. 4. Sakalkale...