Accuracy of Acetabular Cup Placement During Total Hip Arthroplasty in Supine Position Using a Pelvic Rotation Correction Device

Secure paediatric pelvic fracture external fixation using an intraoperative support device

“…This device was reported to be accurate within 3° for cup placement. 16 The mean difference in pin insertion angle between preoperative and postoperative CT was 7.5° for RI and 3.3° for RA in this case. We have to consider that the reduction procedure affected this result, although the mean RI difference was greater than the result of the study reported by Nakasone et al .…”

“…The direction of half-pin insertion could be checked intraoperatively by inputting these values into a surgical support device for THA. This device was reported to be accurate within 3° for cup placement 16. The mean difference in pin insertion angle between preoperative and postoperative CT was 7.5° for RI and 3.3° for RA in this case.…”

“…The 3D template software for preoperative planning of THA and cup placement was conventionally and accurately performed using an FPP-referenced surgical support device intraoperatively in our institution. 16 The surgical support device based on 3D THA template was applied for this half-pin insertion. Nakasone et al and Takaesu et al reported a new external fixation half-pin route, which was located at the point averaging 12.3 mm dorsally from the iliac crest with a mean length of 92.7 mm.…”

“…We have to consider that the reduction procedure affected this result, although the mean RI difference was greater than the result of the study reported by Nakasone et al . 16 This could be considered a reduction angle from a different perspective, since the postoperative CT showed that the half-pins were placed into the iliac bone and there was no perforation. This procedure’s advantage is that if the preoperative planning is accurate and the procedure is performed according to the preoperative plan, there is no need to use fluoroscopic equipment during surgery.…”

“…Half-pin insertion was planned based on data obtained from the preoperative CT, and pelvic external fixation using an intraoperative support device that references on an FPP was performed. The 3D template software for preoperative planning of THA and cup placement was conventionally and accurately performed using an FPP-referenced surgical support device intraoperatively in our institution 16. The surgical support device based on 3D THA template was applied for this half-pin insertion.…”