Cemented Long stem

Design of Cemented Long Stem

Overview: The cemented long stem is specifically designed for total hip arthroplasty, focusing on optimizing stability, wear resistance, and range of motion.

Neck Features

1. Neck Angle:
   • 135-Degree Angle: Designed to support natural hip biomechanics, enhancing movement and stability.
   • Highly Polished Surface: Minimizes friction with the UHMWPE component, reducing wear and grinding.
2. Standard Offsets:
   • Compatibility: Standard offsets ensure compatibility with various acetabular components, accommodating different patient anatomies.
3. Reduced Proportionate Neck Geometry:
   • Increased Range of Motion: The streamlined neck design allows for greater articulation and improved flexion.

Design Elements

1. Material Composition:
   • Co-Cr-Mo Alloy: The cemented stem is made from a cobalt-chromium-molybdenum alloy, known for its exceptional wear resistance and mechanical properties.
2. Biplanar Stem Taper:
   • Enhanced Stress Distribution: The biplanar taper design helps prevent sinking and ensures better stress distribution during load-bearing activities.
3. Collar Design:
   • Enclosed Environment: The collar provides an enclosed space in the proximal region, supporting proper positioning and stabilization of the bone cement.
   • 45-Degree Collar Angle: This angle facilitates optimal support and settlement of the stem within the femoral canal.
4. Highly Polished Surface:
   • Reduced Shear Forces: The polished finish decreases shear forces between the prosthesis and the bone cement, promoting long-term stability.
5. Head Taper:
   • 12/14 Taper Configuration: This taper ensures compatibility with standard femoral heads, allowing for secure attachment and optimal load distribution.