Hip Pelvis.  2021 Dec;33(4):181-189. 10.5371/hp.2021.33.4.181.

Ultra-Short Bone Conserving Cementless Femoral Stem

• Kim YH

• KMID: 2525946
• DOI: http://doi.org/10.5371/hp.2021.33.4.181

Abstract

Excellent long-term results have been reported with conventional length cementless femoral stems in total hip arthroplasty; however, proximal stress shielding and thigh pain are still a concern. Metaphyseal engaging bone conserving short stems provide theoretical benefits compared with conventional length cementless stems, including avoiding proximal-distal mismatch, decreasing proximal stress shielding, and limiting perioperative fractures. The purpose of the ultra-short bone conserving cementless stem was to reproduce natural load transfer with an ultra-short stem obtaining optimal stability using the morphology of the proximal femur. Loss of stability of the stem and failure of osseous ingrowth is a potential concern with the use of ultra-short proximal loading cementless femoral stems. Ultra-short, metaphyseal-fitting anatomic or non-anatomic cementless femoral stems provided stable fixation without relying on diaphyseal fixation in young and elderly patients, suggesting that metaphyseal-fitting alone is sufficient in young and elderly patients who have good bone quality.

Keyword

Ultra-short cementless stem; Total hip arthroplasty; Young and elderly patients