Comparing the accuracy of radiographic preoperative digital templating for a second- versus a first-generation THA stem.

@article{Issa2012ComparingTA,
  title={Comparing the accuracy of radiographic preoperative digital templating for a second- versus a first-generation THA stem.},
  author={Kimona Issa and Robert Pivec and Bradley Boyd and Steven F. Harwin and Thies Wuestemann and J. E. Nevelos and Michael A Mont},
  journal={Orthopedics},
  year={2012},
  volume={35 12},
  pages={
          1028-34
        }
}
  • K. Issa, R. Pivec, +4 authors Michael A Mont
  • Published 1 December 2012
  • Medicine
  • Orthopedics
This study assessed the accuracy of preoperative digital templating for a second-generation cementless stem compared with its first-generation design. A prospective cohort of 100 consecutive patients who had undergone a primary total hip arthroplasty using a new second-generation cementless stem was compared with the prior 100 hips that had received the first-generation stem. The authors believe that the second-generation stem may allow equal or more accurate digital templating compared with… 
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The technical difficulty of femoral preparation and the surgeon's knowledge of possible related complications might lead to implant undersized stems more frequently through DAA than through PA, especially if intraoperative imaging controls are not used.
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The accuracy and reliability of preoperative digital 2D templating in prosthesis size prediction in uncemented versus cemented total hip arthroplasty: a systematic review and meta-analysis
TLDR
The accuracy of preoperative digital templating in prosthesis size prediction for the planning of cemented or uncemented THA is greater for cemented prostheses, but the inter-observer reliability is greatest for uncements, and the intra-ob server reliability showed a high level of agreement for unCEmented prostheses.
Usefullness of three-dimensional templating software to quantify the contact state between implant and femur in total hip arthroplasty
TLDR
Three-dimensional templating software was used to quantify the implant–femur contact state and develop a technique to analyze the initial fixation pattern of a cementless femoral stem to indicate that quantifying the contact state of implant and femur by using density mapping is a useful technique to accurately analyze the fixation pattern.
Factors related to disagreement in implant size between preoperative CT-based planning and the actual implants used intraoperatively for total hip arthroplasty
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Implant size agreement rates between the three-dimensional plan and the actual implants used intraoperatively were high, however, broach alignment should be checked in the coronal and sagittal planes if the intraoperative broach is smaller than the planned size.
Scaling Marker Position Determines the Accuracy of Digital Templating for Total Hip Arthroplasty
TLDR
Based on the findings in this study, scaling markers for hip imaging should be placed laterally, mid-thigh in the anterior-posterior direction for patients with a BMI between 25 and 40 kg/m2 and if abnormal hip anatomy or extremes of BMI are discovered, then scaling sphere positioning should be optimized on a case-by-case basis.
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