Which femoral stem designs have the lowest risk of complications in hip arthroplasty?
The femoral stem is the metal part that goes down into the thigh bone during a total hip replacement. Different stem shapes and how they are fixed (cemented or not) can lead to different problems later, such as loosening, fracture around the implant, infection, or the need for another surgery. Research does not point to one single "best" stem for everyone. Instead, the safest choice depends on the complication you most want to avoid and on the patient's own bone quality and anatomy. National registry data and meta-analyses suggest that cemented composite beam stems have the lowest risk of fracture around the implant, while certain cementless designs have lower revision rates than others 468.
What the research says
A 2025 meta-analysis of 18 studies compared four stem shapes: anatomic, single-wedge, single-taper, and taper wedge 4. The highest revision rate was in anatomic stems at 3.9 percent. Single-wedge stems had the lowest relative revision risk (about 69 percent lower than anatomic), followed by single-taper (about 62 percent lower) and taper wedge (about 48 percent lower) 4. However, the picture flips for infection: periprosthetic joint infection (an infection around the implant) was lowest in anatomic stems at 0.22 percent and higher in single-taper and taper wedge stems 4. Aseptic loosening (the implant coming loose without infection) was also lower in single-wedge stems than anatomic stems 4. So no single design wins on every measure.
What to ask your doctor
- Which stem design do you plan to use for me, and why does it fit my bone quality and anatomy?
- Given my risk factors, is a cemented composite beam stem or a collared cementless stem a better option to lower my fracture risk?
- How does the stem design you recommend balance revision risk against infection risk for someone like me?
- What does your hospital's or surgeon's own data show for complication and revision rates with the stems you use?
- Should my age, activity level, or any prior spine surgery change which stem design is safest for me?
This question is drawn from common patient questions about Orthopedics & Sports Medicine and answered using cited medical research. We do not provide individualized advice.