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Digital templating in primary total hip and knee arthroplasty
Brett Levine1, David Fabi, Carl Deirmengian
1Rush University Medical Center, Chicago, Illinois, USA. BrettLevineMD@gmail.com
Orthopedics
|November 9, 2010
Summary
Digital templating accurately predicts implant size for total hip (THA) and knee (TKA) arthroplasty. This effective method ensures precise component selection in orthopedic surgery, even with digital radiography.
Area of Science:
- Orthopedic Surgery
- Medical Imaging
Background:
- Digital radiography adoption in orthopedics necessitates evaluating new planning tools.
- Preoperative planning for total hip arthroplasty (THA) and total knee arthroplasty (TKA) is crucial for successful outcomes.
Purpose of the Study:
- To assess the clinical success and accuracy of digital templating for primary THA and TKA using the Advanced Case Plan system.
- To validate the accuracy of a metallic sphere calibrating marker in digital radiography.
Main Methods:
- Digital radiographs from 269 patients (93 THA, 176 TKA) were templated using Advanced Case Plan software.
- A 25.4-mm metallic sphere served as a calibrating marker for accuracy.
- Preoperative digital templating results were compared with intraoperative implant sizes.
Main Results:
- Digital templating correctly predicted implant size in 58.5% of THAs and 66% of TKAs.
- 93% of THA and 98.5% of TKA templating were within 1 size of the final implant.
- The metallic sphere marker accurately predicted femoral head size within 1.5 mm in all cases.
Conclusions:
- Digital templating is an effective tool for predicting THA and TKA component sizes.
- This method is a viable option for preoperative planning in the era of digital radiography.
- Further research should explore interobserver reliability and training impact on accuracy.
