• 135* consecutive primary total hip arthroplasties were templated preoperatively using the TraumaCad^TM templating software (Orthocrat Ltd, Israel).
• Hips were templated using magnification-calibrated radiographs. For each hip, an AP pelvis, AP and false profile projection were used for the preoperative assessment.
• All acetabuli implanted were either Trilogy Trabecular Metal (Zimmer), Trident PSL (Stryker), or Pinnacle (DePuy) implants.
• Femoral stems were either Alloclassic or ML-Taper (Zimmer), Accolade or Exeter (Stryker), or Corail (DePuy).
• All hips were implanted by a single surgeon using either a MIS posterior or modified MIS Watson-Jones approach.
• Postoperatively, the predicted implant size was compared to the actual components selected at the time of surgery.

Conclusions:

• Surgeon’s ability to anticipate intraoperative needs is critical to success.
• Digital X-Ray imaging has necessitated a change in the way preoperative templatingis performed.
• Digital preoperative templating for hip arthroplasty enables this need.
• The TraumaCad™ application proved highly accurate and reliable, predicting exact component size in >70% of cases, within 1 size in >95% of cases, and within 2 sizes in 100% of cases.
• Intraoperative restoration of leg-lengths was highly reproducible and accurate, achieving a postoperative difference less than 5 mm in 89% of cases.
• This accuracy transcended the multiple implant designs employed.
• It is likely that this technology (using magnification-calibrated images) enables more precise prediction of intraoperative needs when compared to the traditional film-based techniques (that relied upon estimations of magnification).
• To our knowledge, this is the largest series of digitally-templated hip arthroplasties reported. 

For more details visit the poster - http://www.orthocrat.com/PDF/Kantor_poster.pdf