The assessment of canal flare index and proximal femoral bone density can improve stem selection for peri-prosthetic bone maintenance after total hip arthroplasty. | Semantic Scholar (2024)

Lower mean BMD and more severe cortical hypertrophies were found in the NT group, and unexpected catastrophic failure rates of 41% caused by early aseptic loosening were noted within 50months.

The cementless Polarstem may have a positive effect on postoperative bone mineral density in the distal femur, however, varus malalignment and anteversion error of the stem could have a negative influence on the bone mineraldensity changes in the proximal femur.

Peri-prosthetic bone remodeling remained unaffected by stem alignment after THA with the new short full HA compaction stem, and stem insertion alignments of anteversion, valgus, and anterior tilt were different between the two stem types.

Lower preoperative lumbar BMD on the lateral side and lower CFI were correlated with zone 7 BMD loss after THA, a sign that patients with these characteristics should be monitored carefully for severe B MD loss afterTHA.

Peri-prosthetic bone remodelling remained unaffected by clinical and radiographic factors after THA with the new short full HA compaction stem, therefore, this new stem may be useful in a variety of cases.

Cementless hemiarthroplasty for the treatment of femoral neck fracture in elderly patients achieves a good clinical outcome despite significant bone loss around the femoral stem, and the reduction in BMD is more pronounced in the metaphyseal region.

It is demonstrated that excessive stem anteversion mismatch to the anatomical canal anteversion causes stem point contact with the cortical bone in the distal portion and affected proximal periprosthetic BMD loss after THA.

Stovepipe models implanted with large-size stems had significantly lower equivalent stress on the proximal-medial area of the femur compared with champagne-flute and intermediate models, with a significant loss of BMD in the corresponding area at one year post-operatively.

Daily activity may reflect improvements in periprosthetic bone quality after THA; however, the use of this tapered-wedge stem is not recommended in patients with poor bone quality.

The HHS and survival was duration-dependent—if given the sufficient duration of follow-up, hydroxyapatite coating would be better than porous coating for the survival, and Hydroxyap atite coating has shown to have an advantage over porous coating.

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