Stability Strength

Strength
you can trust
Stability
you can depend on

Tot
* Co
Versatility
The SMF system addresses a wide range of patient anatomy using only
four neck options, three of which can be inverted for a total of seven
unique neck positions. When combined with the full complement of
Smith & Nephew femoral heads, the SMF system provides 42 distinct
head centers.
Standard High offset High offset
reverse/valgus
Right Anteverted Right reverse/valgus Left Anteverted Left reverse/valgus
42 distinct head centers
Each dot represents a head center
that is achievable with the SMF
system and the vast complement of
Smith & Nephew femoral heads.

Strength
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
83%
18%
Ti modular stem
SMF stem
Ti monolithic stem
Relative neck Relative fatigue neck strength fatigue strength

Stability
Utilizing radiostereometric 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
industry 3 , a porosity of 60% and
an average pore size which is ideal
for bony ingrowth 4 , STIKTITE coating
provides a solid foundation for both initial
and long-term fixation.
Total implant migration as determined by the RSA*
al implant migration as determined by the RSA*
2.00
1.50
Migration (mm)
1.00
SMF
0.50
SYNERGY
0.00
6 wks 3 mos 6 mos 1 year
mbination * Combination of subsidence, of subsidence, rotation and translation rotation and translation
Follow up

Conservation
The SMF system offers surgeons an improved bone
sparing modular neck implant which is more than
20% shorter than other conventional hip stems.
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.
For more information, talk with
your Smith & Nephew sales
representative or visit online at
shortmodular.com

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 McCalden, DN Naudie, A Thompson,
CA Moore.
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.
Orthopaedics
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