Abstract

The aim of the study was to validate a software-based planning method for the Schoettle Point and to evaluate precision and time efficiency of its live overlay on the intraoperative X-ray. A software-based method was compared with surgeons' manual planning in an inter- and intrarater study. Subsequently, K-wire placement was performed with and without an overlay of the planning. The time used and the precision achieved were statistically compared. The average deviation between the surgeons (1.68mm; 2.26mm) was greater than the discrepancy between the surgeons and the software-based planning (1.30mm; 1.38mm). In the intrarater comparison, software-based planning provided consistent results. Live overlay showed a significantly lower positioning error (0.9±0.5mm) compared with that without overlay (3.0±1.4mm, p=0.000; 3.1±1.4mm, p=0.001). Live overlay did not achieve a significant time gain (p=0.393; p=0.678). The software-based planning and live overlay of the Schoettle Point improves surgical precision without negatively affecting time efficiency.

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