English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The primary stability of the femoral stem (FS) implant determines thesurgical success of cementless 15 hip arthroplasty. During the insertion, acompromise must be found for the number and energy of 16 impacts that should besufficiently large to obtain an adapted primary stability of the FS and not toohigh 17 to decrease fracture risk. The aim of this study is to determinewhether a hammer instrumented with a 18 force sensor can be used to monitor theinsertion of FS. 19 Cementless FS of different sizes were impacted in fourartificial femurs with an instrumented hammer, 20 leading to 72 configurations.The impact number when the surgeon empirically felt that the FS was fully 21inserted was noted Nsurg. The insertion depth E was assessed using video motiontracking and the impact 22 number Nvid corresponding to the end of theinsertion was estimated. For each impact, two indicators 23 noted I and D weredetermined based on the analysis of the variation of the force as a function oftime. 24 The pull-out force F was significantly correlated with the indicator I(R${}^2$ =0.67). The variation of D was 25 analyzed using a threshold todetermine an impact number Nd, which is shown to be closely related to 26 Nsurgand Nvid, with an average difference of around 0.2. This approach allows todetermine i) the moment 27 when the surgeon should stop the impaction procedurein order to obtain an optimal insertion of the FS 28 and ii) the FS implantprimary stability. This study paves the way towards the development of adecision 29 support system to assist the surgeon in hip arthroplasty.

Monitoring cementless femoral stem insertion by impact