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Assessing the Accuracy of Bone Resection by Cutting Blocks in Patient-Specific Total Knee Replacements
Joint Authors
Jariwala, A.
Pillai, Anand
Yeo, Cheng Hong
Pourgiezis, N.
Source
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-4, 4 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-05-20
Country of Publication
Egypt
No. of Pages
4
Main Subjects
Abstract EN
Introduction.
The key to a successful total knee arthroplasty (TKA) is the restoration of the mechanical axis with balanced flexion and extension gaps.
Patient-specific cutting block technique has been the latest development in total knee arthroplasty.
This technique uses a magnetic resonance image (MRI) of the patient's symptomatic knee to create bone models and cutting jigs.
This study was designed to evaluate the intraoperative accuracy of the patient-specific cutting block as compared to the preoperative template.
Methods.
Visionaire (Smith and Nephew, Genesis 2 Knee Arthroplasty) patient-specific TKA was used in all patients.
An independent research officer was responsible for measuring all the resected articular surfaces of femur and tibia during surgery and compared it to the cutting block manufactured according to the preoperative template.
Seven different measurements from each patient were obtained; four different measurements from the femur and three from the tibia were recorded.
The differences between the actual resections made intraoperatively, as compared to the original pre-operative templates, were noted as the error.
The surgical team was blinded to the measurements of the resections and the calculations of the errors.
Results.
Twenty-six Visionaire patient-specific TKA were included in the study.
A total of 182 readings of bone resections made intraoperatively (seven for each patient).
Eighty five percent of all collected readings were below the error margin of ≤1.5 mm.
Size of resection had no effect on the error margin.
All patients had satisfactory post-operative alignment, and at discharge all 26 patients achieved more than 90° of knee flexion.
Conclusion.
This observational study provides evidence that patient-specific TKA is comparable to other forms of TKA and may have some distinct advantages.
In addition, we have shown that the cutting blocks are able to consistently deliver accurate cuts that are reproducible.
We recommend intra-operative measurement of the bone resection and its comparison with the cutting block as a routine surgical step to confirm the MRI scan data, block placement, and instant validation of the bony resection before implant placement.
American Psychological Association (APA)
Yeo, Cheng Hong& Jariwala, A.& Pourgiezis, N.& Pillai, Anand. 2012. Assessing the Accuracy of Bone Resection by Cutting Blocks in Patient-Specific Total Knee Replacements. ISRN Orthopedics،Vol. 2012, no. 2012, pp.1-4.
https://search.emarefa.net/detail/BIM-477350
Modern Language Association (MLA)
Yeo, Cheng Hong…[et al.]. Assessing the Accuracy of Bone Resection by Cutting Blocks in Patient-Specific Total Knee Replacements. ISRN Orthopedics No. 2012 (2012), pp.1-4.
https://search.emarefa.net/detail/BIM-477350
American Medical Association (AMA)
Yeo, Cheng Hong& Jariwala, A.& Pourgiezis, N.& Pillai, Anand. Assessing the Accuracy of Bone Resection by Cutting Blocks in Patient-Specific Total Knee Replacements. ISRN Orthopedics. 2012. Vol. 2012, no. 2012, pp.1-4.
https://search.emarefa.net/detail/BIM-477350
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-477350