With the rapid growth of primary Hip Replacement surgeries, the number of hip revision surgeries has also been steadily rising. In recent years, as joint replacements are becoming more common among younger individuals, choosing an implant that can truly address the challenges of hip revisions is not just a key factor for surgical success but also a guarantee to improve the postoperative quality of life for patients.

RSL Revision Femoral Stem

As one of the highly regarded revision solutions from JUST, the RSL Revision Femoral Stem has garnered the affection of surgeons. What makes it so favored? We can decode this from its design features:

Design Features

1. 2° Tapered Design

The RSL Revision Femoral Stem features a 2° tapered cone-shaped stem. In terms of long-term stability, a tapered stem tends to integrate better with the proximal femur than a cylindrical one, thus reducing the chances of stem loosening and postoperative thigh pain. In a study published in "The Journal of Arthroplasty," Robert D. Russell noted that in cases with significant bone loss of only 3cm in the femoral diaphysis, the 2° tapered stem exhibited superior initial fixation stability compared to a cylindrical stem.

2. 8 Longitudinal Ridges Design

The sharp 8 longitudinal ridges anchor close to 0.1-0.5 mm within the cortical bone, providing reliable anti-rotation stability.

There's a space between each ridge, promoting vascular regeneration within the cancellous bone, and expediting marrow cavity reconstruction.

For the same outer diameter, the design with 8 ridges can reduce stem thickness, thereby lowering stiffness and preventing stress shielding-induced loosening and thigh pain.

The 8-ridge design increases the contact area with the bone surface (similar to a taper thread connection), enhancing stem stability and bone integration.

3. Integrated Rough Surface

The integrated design eliminates the risk of junctional fractures. The rough surface gap allows for bone ingrowth, and the resulting microstructure affects mechanical conduction, creating a discontinuous load transfer effect to encourage bone integration.

4. Circular Cross-Section Design

The RSL stem has an overall conical shape, resulting in a circular cross-section. This allows for adjusting the anteversion angle during surgery, facilitating physician maneuverability and aligning the patient's physiological force line.

The conical shape of the stem eliminates edges, reducing the risk of intraoperative or postoperative bone fractures caused by stress concentration around the stem's periphery.

• References

[1] Soon K J , Ho M K , Rim P S , et al. Long-Term Results of Total Hip Arthroplasty with an Extensively Porous Coated Stem in Patients Younger than 45 Years Old[J]. Yonsei Medical Journal, 2010, 51(1):100-.

[2] Sandiford N A , Garbuz D S , Masri B A , et al. Nonmodular Tapered Fluted Titanium Stems Osseointegrate Reliably at Short Term in Revision THAs[J]. Clin Orthop Relat Res, 2016, 475(1):1-7.

[3] Liang G, Jie L, Zhiqiang Z . Efficacy Analysis of Wagner SL Revision Stem in Revision Total Hip Arthroplasty[J]. Practical Journal of Bone and Joint Surgery, 2014, 20(1):17-21.

[4] Xu H , Chen L , Wang J , et al. Indications and Efficacy of Wagner SL Femoral Stem in Hip Revision Surgery[J]. Chinese Journal of Orthopedics, 2016, 24(12):1062-1066.

[5] Böhm P, Bischel O. Femoral revision with the Wagner SL revision stem : evaluation of one hundred and twenty-nine revisions followed for a mean of 4.8 years.[J]. Journal of Bone & Joint Surgery-american Volume, 2001, 83(7):1023-1031.

[6] Alamo J G D, Garcia-Cimbrelo E, Castellanos V, et al. Radiographic Bone Regeneration and Clinical Outcome With the Wagner SL Revision Stem : A 5-Year to 12-Year Follow-Up Study[J]. Journal of Arthroplasty, 2007, 22(4):515-524.

[7] Mantelos G, Koulouvaris P, Kotsovolos H, et al. Consistent new bone formation in 95 revisions: average 9-year follow-up.[J]. Orthopedics, 2008, 31(7):654.

[8] Ali Baktır, Karaaslan F , Kürşat Gencer, et al. Femoral Revision Using the Wagner SL Revision Stem: A Single-Surgeon Experience Featuring 11–19 Years of Follow-Up[J]. Journal of Arthroplasty, 2015, 30(5):827-834.

[9] Zhu W , Ji G , Wen X , et al. Treatment of Vancouver B3 Periprosthetic Femoral Fracture after Hip Arthroplasty with Wagner SL Stem[J]. Journal of Modern Integrated Traditional Chinese and Western Medicine, 2015(4):386-387.