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The 3C hip system employs a straight stem with tapered lateral shoulder, tapered lateral distal stem and proximal coating to encourage proximal bone ingrowth.

The profile is straight with a wide proximal M-L dimension to give the implant stability against rotational forces and protects against sinking.

Two stem types for cemented and cementless stems, as well as a short version of the cementless stems allow for optimal adaption to the patients anatomy and bone quality

• Standard stem type with a CCD angle of 131º
• Lateralizing stem type with a CCD angle of 127,5º
• No vertical drop difference

The short (B) version is a shortened standard (A) stem. The cemented version is one size down from the cementless stem. This features allow to implant a short, standard cementless or cemented stem with the same surgical technique, or for a intraoperative change between the 3C variants.

The following materials and coatings are used for 3C hip stems:

• The cemented stem is made from EndoDur-S (forged CoCrMo)
• The cementless stem is made from Tilastan-S (forged Ti6Al4V alloy)
• Micro-roughness of the stem’s surface ensures primary fixation and is available in PlasmaLink and osteoconductive double coating made from titanium plasma and calcium phosphate (TiCaP)¹

This produces a regular and uniform micro structure surface. The distal stem is smooth to discourage bone integration.

1. Flattened tapered neck increases the range of motion between stem and acetabular cup
    
2. The highly polished neck area reduces the abrasion of the polyethylene insert if contact should occur²
    
3. Tapered lateral shoulder of the stem allows the trochanter major to remain intact while still providing a wide proximal M-L dimension of the implant
   - Allows direct anterior approach
    
4. Large anatomical medial curvature provides metaphyseal support, fixation and load transfer. Additionally it ensures good anatomical fit, essential for primary and long term stability
    
5. Tapered distal end prevents bone contact
   - For the standard length this facilitates introduction of the stem into the medullary cavity