Which material is used for fixation of a cemented hip stem?

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Multiple Choice

Which material is used for fixation of a cemented hip stem?

Explanation:
PMMA bone cement is used for fixation of a cemented hip stem because it serves as the intermediary bonding medium between the metal stem and bone. It is applied into the prepared canal and around the stem, then polymerizes to form a solid mantle that mechanically anchors the implant and evenly distributes load. This provides immediate, stable fixation suitable for a cemented arthroplasty. Other surfaces like porous coatings or hydroxyapatite coatings are intended to promote bone ingrowth in cementless systems, while a cementless or press-fit approach relies on friction rather than cement.

PMMA bone cement is used for fixation of a cemented hip stem because it serves as the intermediary bonding medium between the metal stem and bone. It is applied into the prepared canal and around the stem, then polymerizes to form a solid mantle that mechanically anchors the implant and evenly distributes load. This provides immediate, stable fixation suitable for a cemented arthroplasty. Other surfaces like porous coatings or hydroxyapatite coatings are intended to promote bone ingrowth in cementless systems, while a cementless or press-fit approach relies on friction rather than cement.

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