Automated impaction in primary THA safe technique for femoral preparation resulting in consistent stem coronal alignment
While automated impaction can provide a more standardized process for femoral canal preparation, little is known regarding its effect on femoral component sizing and position.
Hope S. Thalody et al conducted a study to directly compare femoral component canal fill ratio (CFR) and coronal alignment between primary total hip arthroplasty (THA) procedures performed with automated impaction versus manual mallet impaction.
A retrospective analysis was performed on 184 patients who underwent primary THA by a single arthroplasty surgeon with a modern cementless femoral component using either the direct anterior or posterolateral approach. The final cohort was divided into 2 groups based on impaction technique during broaching: automated (N = 122) or manual (N = 62). A propensity score match was used to match for age, body mass index, sex, high versus standard offset stem, and preoperative femoral bone quality. Radiographic review was performed to measure intramedullary prosthetic CFR and coronal alignment.
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