Summary: This study verified the intra- and inter-operator reliability of an extramedullary (EM) accelerometer-based smart cutting-guide for distal femoral resection during primary total knee arthroplasty (TKA)

Purpose

To verify the intra- and inter-operator reliability of an extramedullary (EM) accelerometer-based smart cutting-guide for distal femoral resection during primary total knee arthroplasty (TKA).
The hypothesis was a good correlation between operators and a difference < 1°, indicating a good reliability of the device.

Methods

25 not consecutive patients with knee osteoarthritis undergone to primary TKA using an EM inertial-based cutting guide to perform distal femoral resection.
In order to assess the agreement in femoral axis definition of the device, two operators performed three time each the maneuvers necessary to define axis. Inter rater agreement was evaluated with Bland & Altman agreement test.
Intra rater repeatability was evaluated analysing average results distribution of repeated measurements. Accuracy of the device was evaluated comparing differences between intra operative device data with final implant alignment measured on post-operative longstanding x-rays using Students’ t test.

Results

Agreement between the two operators was statistically significant (p<0.05) with a Bias of -0.4°(95%CI -0.6° to -0.2°). Average difference between cut orientation measured with device and final implant position, measured on x-rays was 0.2° (95%CI -1.5° to 1.7°) with no statistical difference between the two measurements. Final implant alignment, measured on x-ray was 90.2°, with 95% of cases distributed within range 88.0° to 92.0° for varus-valgus and 2.8°, with 95% of cases distributed within range 2.0° to 4.0° for flexion-extension.

Conclusions

The inertial-based EM cutting guide used to perform distal femoral resection during primary TKA demonstrated a good intra- and inter-operator reliability in the present in-vivo study.

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Effect of Altered Knee Joint Loading Pattern in Gait Biomechanics of Total Knee Arthroplasty Patient ePoster Presentation Sang Jin Lee, MD, PhD, KOREA, REPUBLIC OF
Relationship Between The Femoral And Tibial Component Positions And Postoperative Knee Range Of Motion After Posterior-Stabilized Total Knee Arthroplasty ePoster Presentation Mitsuru Hanada, MD, PhD, JAPAN Yukihiro Matsuyama, MD, PhD, Prof., JAPAN
Is Surgeon Assessed Bone Quality During Total Knee Arthroplasty a Valid Tool To Diagnose Osteoporosis ? ePoster Presentation Adit Rajesh Maniar, MBBS, MS Orthopaedics, DNB Orthopaedics, INDIA Arpit Vasantbhai Bavaskar, MBBS, D.Orth., INDIA Vishal Raina, MS, INDIA Akshay Nayak, M.B.B.S, M.S , INDIA Ashwini Khokhar, MS, INDIA Rajesh Maniar, INDIA
Detection Loosening of Total Knee Arthroplasty Implant from Plain Radiograph Using Machine Learning Algorithm ePoster Presentation Man-Soo Kim, MD, PhD, KOREA, REPUBLIC OF Dongho Kwak, MD, KOREA, REPUBLIC OF Sungcheol Yang, MD, KOREA, REPUBLIC OF Hyukjin Jang, MD, KOREA, REPUBLIC OF Ryu Kyoung Cho, MD, KOREA, REPUBLIC OF Yong In, MD, PhD, KOREA, REPUBLIC OF
Association Between The Femoral And Tibial Component Positions and Intraoperative Knee Kinematics In Posterior-Stabilized Total Knee Arthroplasty ePoster Presentation Mitsuru Hanada, MD, PhD, JAPAN Yukihiro Matsuyama, MD, PhD, Prof., JAPAN
Knee Arthroscopy Prior to UKA Does Not Cause Infection ePoster Presentation Kevin D. Plancher, MD, MPH, UNITED STATES Karen Briggs, MPH, UNITED STATES Stephanie C. Petterson, MPT, PhD, UNITED STATES
Antero-Posterior Translation of Mobile-Bearing in Mobile-Bearing Unicompartmental Knee Arthroplasty ePoster Presentation Takahiro Arakawa, MD, JAPAN Kenichi Kono, MD, PhD, JAPAN Tetsuya TOMITA, MD, PhD, JAPAN Shuji Taketomi, MD, PhD, JAPAN Ryota Yamagami, MD, JAPAN Kohei Kawaguchi, MD, PhD, JAPAN Tomofumi Kage, JAPAN Ryo Murakami, MD, JAPAN Hiroshi Inui, PhD, JAPAN Sakae Tanaka, MD, PhD, JAPAN
Novel Technique For Surgeon-Placed Nerve Block And Continuous Nerve Block In Total Knee Arthroplasty. A Cadaveric Study ePoster Presentation Daniel E Matthews, MD, FAAOS, UNITED STATES

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Intra- And Inter-Operator Reliability Assessment Of A Novel Extramedullary Accelerometer-Based Smart Cutting-Guide For Total Knee Arthroplasty: An In-Vivo Study

Intra- And Inter-Operator Reliability Assessment Of A Novel Extramedullary Accelerometer-Based Smart Cutting-Guide For Total Knee Arthroplasty: An In-Vivo Study

Purpose

Methods

Results

Conclusions

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Intra- And Inter-Operator Reliability Assessment Of A Novel Extramedullary Accelerometer-Based Smart Cutting-Guide For Total Knee Arthroplasty: An In-Vivo Study

Intra- And Inter-Operator Reliability Assessment Of A Novel Extramedullary Accelerometer-Based Smart Cutting-Guide For Total Knee Arthroplasty: An In-Vivo Study

Purpose

Methods

Results

Conclusions

More 2023 ISAKOS Congress Content