SMF◊ Design and Technology
The SMF Short Monolithic Femoral Hip System was designed to provide predictable early implant stability with the benefits of bone conservation and neck modularity that provides 42 head center options with only 4 necks. This allows all of your femoral heads to be used with minimal increased inventory.
- 11 stems
- 9 modular and 2 monolithic
- Short stem length (73-101mm)
- Proximal neck resections
- Modular necks
- Proximal coating with STIKTITE◊
- 42 Head Centers
A CoCr modular neck provides for a strong neck construct. Fatigue testing has shown that the SMF Cobalt Chrome modular neck design exceeds the fatigue strength of the same neck design made out of titanium alloy by as much as 83% and a conventional titanium monolithic hip stem by as much as 18%. 1
Utilizing radiosterometric analysis (RSA), the SMF system demonstrated stability consistent with the clinically successful SYNERGY◊ primary hip stem. Moreover, HHS and WOMAC scores indicated excellent relative clinical outcomes for the SMF group.2 With one of the highest coefficients of friction in the industry3, a porosity of 60% and an average pore size which is ideal for boney ingrowth4, STIKTITE◊ coating provides a solid foundation for both initial and long term fixation.
42 distinct head center
Each dot represents a head center that is achievable with the SMF system and the vast compliment of Smith & Nephew femoral heads.
The SMF system offers surgeons an improved bone sparing modular neck implant. Additionally, the SMF stem design allows for a higher neck resection which conserves more of the patient's femur than conventional stems. Saving more bone during a primary hip arthroplasty means a wider range of options for the future.
1. Aldinger P, Tsai S, and Bergin A. CoCr and Ti-6Al-4V Modular Neck Fatigue Testing, Poster no. 479 presented at the Society for Biomaterials 2009 Annual Meeting and Exposition, April 22-25, 2009, San Antonio, TX.
2. Bone&JointScience Vol 01. No 02. Dec 2010 RSA analysis of early migration of the uncemented SMF vs SYNERGY stem: A prospective randomized controlled trial RW McCalden1, DN Naudie1, A Thompson1, CA Moore2
3. Heiner AD, Brown TD. Frictional coefficients of a new bone ingrowth structure, Poster no. 1623 presented at Orthopaedic Research Society Annual Meeting, Feb. 11-14, 2007, San Diego, CA.
4. Kienapfel H, Sprey C, Wilke A, and Griss. Implant fixation by bone ingrowth, J Arthroplasty, 14(3):355-68, 1999.