Primary Stability of Collared and Collarless Cementless Femoral Stems - A Finite Element Analysis Study.

ABSTRACT:

Background

Primary stability of the femoral stem is important for the long-term results of cementless total hip arthroplasty. Cementless collared stems have been known to have higher stability than collarless stems when there is a contact between the collar and the calcar. The purpose of this study was to compare the stabilities of collared stem and collarless stem in 2 loading conditions: 1) flat walking and 2) stair climbing.

Methods

We constructed 3 finite element models. In the first model, the collar had contact with the calcar. The second model had a 1 mm gap between the calcar and the collar. The third model was constructed with a collarless stem. The proximal femur around the stem was divided into 3 zones: the upper zone (Gruen zones 1 and 7), the middle zone (Gruen

SUBMITTER: Watanabe R 

PROVIDER: S-EPMC10160691 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature