|Beitragstitel||Clinical accuracy of a patient-specific femoral osteotomy guide in minimally-invasive posterior hip arthroplasty|
Especially in minimally invasive hip surgery, where reliable bony landmarks are often inaccessible, patient specific guides can be a valuable tool in improving precision of the planned femoral neck osteotomies.
The aim of our study was to validate the accuracy of a novel patient specific femoral osteotomy guide for THR through a minimally invasive posterior approach, the direct superior approach (DSA).
As part of our routine preoperative planning 30 patients underwent low dose CT scans of their arthritic hip. Using these, 3D printed patient specific femoral neck osteotomy guides for DSA were then produced. Intraoperatively, having cleared all soft tissue with the enlocated hip the guide was placed and pinned onto the posterolateral femoral neck. The osteotomy was then performed using an oscillating saw and the uncemented hip components were implanted as per routine.
Postoperatively, the achieved level of the osteotomy at the medial calcar was compared with the planned level of resection using a 3D/2D matching analysis (Mimics X-ray module, Materialise, Belgium).
A total of 30 patients undergoing uncemented TrinityTM acetabular and uncemented TriFit TSTM femoral component arthroplasty (Corin, UK) were included in our analysis.
All but one of our analyzed osteotomies were found to be within 3mm from the planned height of osteotomy. In one single patient the level of osteotomy deviated 5mm below the planned level of resection.
Preoperative planning and the use of patient specific osteotomy guides provides accuracy of femoral neck osteotomies in minimally invasive hip arthroplasty using direct superior approach.