Differences in measurement of lower limb alignment among different registration methods of navigation and radiographs in TKA using the OrthoPilot system.

@article{Seo2012DifferencesIM,
  title={Differences in measurement of lower limb alignment among different registration methods of navigation and radiographs in TKA using the OrthoPilot system.},
  author={Seung-Suk Seo and Jin-Hyeok Seo and Myung-Whan Sohn and Yoon Jun Kim},
  journal={Orthopedics},
  year={2012},
  volume={35 10 Suppl},
  pages={
          50-5
        }
}
The purposes of this study were (1) to compare lower limb alignment measurements between radiographs and computer-assisted surgery and (2) to evaluate the discrepancy in lower limb alignment between computer-assisted surgery with a high tibial osteotomy protocol and computer-assisted surgery with a total knee arthroplasty (TKA) protocol in the same knee. Seventy-one TKAs were performed on patients with primary osteoarthritis using computer-assisted surgery. Preoperative lower limb alignment was… 
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Background Citations
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Methods Citations
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Results Citations
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12 Citations

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Citation Type

Difference between Mechanical Alignment in Navigation and Scanogram during Total Knee Arthroplasty
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Postoperative mechanical alignment values after total knee arthroplasty are lower on navigation than measured on standing full length hip to ankle scanogram, with no correlation between the mean Hip-Knee Ankle Axis and intraoperative mechanical axis.
A whole leg radiograph is not necessary for postoperative determination of the mechanical leg axis after total knee arthroplasty
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A preoperative WLR and a postoperative long AP knee standard radiograph are sufficient to determine the mechanical leg axis after TKR, particularly since they involve higher radiation exposure, are time-consuming, and are also prone to errors in the first postoperative weeks.
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Differences in alignment measurements between CAS measurements and pre- and postoperative EOS 3D are due mainly to the difference between weight-bearing and non-weight-bearing position and potential errors in validity and reliability of the CAS system.
Mechanical Alignment in Knee Replacement Homogenizes Postoperative Coronal Hip-Knee-Ankle Angle in Varus Knees: A Navigation-Based Study.
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It is proposed that an excellent dynamic HKA alignment is achieved not only at full extension within the range of 0 ± 3 degrees but also when this alignment is maintained at 30, 60, and 90’degrees.
Intra- and post-operative accuracy assessments of two different patient-specific instrumentation systems for total knee replacement
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Both PSI systems showed good alignments in the coronal plane in all stages, and for a few measurements, a better performance was observed in the MRI/X-ray-based system than in the CT- based system.
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TLDR
Foot position of ER could show lessvarus alignment and the reverse could occur in the IR position, compared to the neutral foot position, and the severity of varus alignment could be underestimated in the local radiograph, compared with that of whole leg radiograph.
Accuracy of computer navigation in total knee arthroplasty: A prospective computed tomography-based study.
Measurement of lower limb alignment: there are within-person differences between weight-bearing and non-weight-bearing measurement modalities
TLDR
The clinical importance of this study lies in the finding that there are within-person differences between weight-bearing and non-weight-bearing measurement modalities, which has implications for preoperative planning, performing total knee arthroplasty (TKA), and clinical follow-up after TKA surgery using CAS navigation or patient-specific instrumentation.
Innovations in revision total knee arthroplasty
TLDR
This thesis focuses on new techniques in rTKA and is divided into three parts: options during rTka, alignment measurements and computer-assisted surgery (CAS).
Patient specific 3D finite element modelling, analysis and verification of dental implant navigation and insertion system
TLDR
This thesis shows the application of the navigation system to the insertion of long angled implants for posterior support of full-arch prostheses to allow surgical approaches which otherwise could be not pursued using traditional techniques.
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