Six Week Radiographic Comparison of HipGrid® Drone™ and PhantomMSK® Hip

OrthoGrid announces a new clinical whitepaper for review.

A retrospective evaluation was conducted for a consecutive cohort of patients having undergone unilateral total hip arthroplasty via the direct anterior approach between January 2017 and January 2020. All procedures were performed at a single site, by a single, fellowship trained orthopedic surgeon. Intraoperative fluoroscopy was supplemented by either the HipGrid®Drone™ (Drone) or PhantomMSK® Hip (Phantom) (OrthoGrid Systems Inc., Salt Lake City, UT, USA) to assist in the positioning of total hip arthroplasty components including cementless, short femoral stem and acetabular cup. The pre-defined target leg length discrepancy (LLD) and global hip offset (GHO) was less than 10mm and acetabular cup abduction angle (ABD) target was 45 degrees plus or minus 10 degrees for the Drone and 42 degrees plus or minus 10 degrees for the Phantom. Accuracy of component placement was evaluated on the six-week post-operative, weight bearing radiographs. Fluoroscopy times were recorded directly from the c-arm imaging device and surgical times were defined as incision to wound closure. Percentages of patients achieving each component placement goal, as well as reaching all three accuracy goals, were also evaluated. Continuous variables were non-parametric, therefore, group differences were determined by the Mann-Whitney U test and categorical data were evaluated with the Fisher Exact test.

Click here to download the whitepaper:

Some of the data in this whitepaper were previously published in the Journal of Arthroplasty (DOI: 10/1016/j.arth.2020.06.053) by senior surgeon Dr. Cass Nakasone of Straub Medical Center, Bone and Joint Center, Honolulu, HI 96813. Click here to view the article on

To request a HipGrid Drone product demo or a PhantomMSK Hip software demo, please click here.

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