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Three-Dimensional Evaluation of Distal Femoral Valgus Angle Using Whole Leg CT in Total Knee Arthroplasty

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Three-Dimensional Evaluation of Distal Femoral Valgus Angle Using Whole Leg CT in Total Knee Arthroplasty

Atsushi Sato, MD, PhD, JAPAN Jun Oike, MD, PhD, JAPAN Masataka Ota, MD, JAPAN Kanako Izukashi, MD, JAPAN Saki Yagura, MD, JAPAN Takayuki Okumo, MD, PhD, JAPAN Naoki Okuma, MD, JAPAN Takayuki Koya, MD, PhD, JAPAN Fumiyoshi Kawashima, MD, JAPAN Hiroshi Takagi, MD, PhD, JAPAN Koji Kanzaki, Prof., JAPAN

Department of Orthopedic Surgery, Showa University Koto Toyosu Hospital, Koto-ku, Tokyo, JAPAN

2023 Congress ePoster Presentation 2023 Congress Not yet rated

Anatomic Location

Knee

Anatomic Structure

Bones

Diagnosis / Condition

Osteoarthritis

Treatment / Technique

Arthroplasty

Patient Populations

Elderly

Diagnosis Method

CT-Scan

Sports Medicine

Basic Science Biomechanics Research

Summary: Distal Femoral Valgus Angle using whole leg 3D-CT varies in each patient in Total Knee Arthroplasty

Introduction

Proper implant positioning is important to get suitable leg alignment in total knee arthroplasty (TKA). However, the three-dimensional evaluation of accurate lower limb alignment is still controversial.

Purpose

Therefore, we performed a three-dimensional evaluation of the distal femoral valgus angle (DFVA) using full-leg CT before TKA.

Methods

Consecutive 296 patients (169 females, 48 males, mean age: 75.4 y.o), yielded 296 knees were included in this study. CT-based patient-specific 3D femur model by ZedKnee software (LEXI) was used to define a mechanical axis and distal anatomical axis of the femur. The case where the angle deviates from the DFVA by ± 3 ° was defined as the outlier, and the ratio of the outlier was evaluated.

Results

The average DFVA was 6.2 ± 2.2 °, of which outliers were found in 53 knees (17.9%). Of the outliers, 22 (7.6%) had DFVA less than 3 ° and 31 (10.5%) had greater than 9 °.

Conclusion

It should be noted that the same cutting angle for performing the distal femoral bone cut in TKA may lead to improper placement of the femoral component.

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Patella in Total Knee Replacement: Patellar Resurfacing has Better Outcomes than Lateral Facetectomy at One Year Follow-Up ePoster Presentation Tomas Alfredo Esteves, MD, ARGENTINA Matias Novillo, MD, ARGENTINA Tomas Nicolino, MD, ARGENTINA Matias Costa-Paz, MD, PhD, ARGENTINA Lisandro Carbó, MD, ARGENTINA Julian Costantini, MD, ARGENTINA
Short Term Outcome of Tibial Defect Reconstruction In Primary Total Knee Arthroplasty: A Retrospective Study ePoster Presentation Sanjib Kumar Behera, MS (Orth), DNB (Rehab), DPMR, INDIA Madhumita Pradhan, BDS, MPH, MHA , INDIA Vikram Choudhary, MD, UNITED STATES
Patellar Medial-lateral Position can be Used to Correct the Effect of Leg Rotation on Preoperative Planning in Total Knee Arthroplasty for Varus Knees ePoster Presentation Shinichiro Nakamura, MD, PhD, JAPAN Shota Takemoto, MD, JAPAN Shinichi Kuriyama, MD, PhD, JAPAN Kohei Nishitani, MD, PhD, JAPAN Hiromu Ito, MD, PhD, JAPAN Mutsumi Watanabe, MD, PhD, JAPAN Young Dong Song, MD, PhD, UNITED STATES Shuichi Matsuda, MD, PhD, JAPAN
Combined Fixed-Bearing Unicompartmental Knee Arthroplasty and Anterior Cruciate Ligament Reconstruction ePoster Presentation Claudio Legnani, MD, ITALY Enrico Borgo, MD, ITALY Vittorio Macchi, MD, ITALY Alberto Ventura, MD, ITALY
Efficacy of Functional Alignment Technique In Robotic-Arm Assisted Total Knee Arthroplasty ePoster Presentation Masashi Tamaki, MD, PhD, JAPAN Yuki Yamauchi, MD,PhD, JAPAN Seishiro Higa, MD, JAPAN Tomoyuki Shimakawa, MD, JAPAN Yuki Isobe, MD, JAPAN Teruya Ishibashi, MD,PhD, JAPAN Shoji Konda, PhD, JAPAN Tetsuya Tomita, M.D.,Ph.D , JAPAN
Clinical Comparison and Survival Rate Between Unicompartmental Knee Arthroplasty and High Tibial Osteotomy With An External Fixator For Varus Knee In Patients Younger Than 60 Years at Mid-Term Follow-Up ePoster Presentation Amit Kumar Yadav, M.S (Orth),DNB(Orth),MNAMS, UNITED KINGDOM Riccardo D'Ambrosi, MD, ITALY Mangal Parihar, MS Ortho, INDIA
Long-Term Results of Per-Operative Knee Arthroscopy in Confirming Suitability for Unicompartmental Arthroplasty ePoster Presentation James Gill, MB BChir, BSc, FRCS, UNITED KINGDOM McMeniman J Peter, AUSTRALIA Timothy John Mcmeniman, MBBS(Med)/MBBS, FRACS FA(Orth)A, AUSTRALIA Daniel Johnson Brimm, BSc, MD, AUSTRALIA Peter T. Myers, AM, MBBS, FRACS, FAOrthA, AUSTRALIA
Lateral Unicompartmental Knee Arthroplasty (UKA) Showed a Lower Risk of Failure Compared to Medial Unicompartmental Knee Arthroplasty in the Register of Prosthetic Orthopedic Implants (RIPO) ePoster Presentation Stefano Zaffagnini, MD, Prof., ITALY Domenico Alesi, MD, ITALY Barbara Bordini, Stat, ITALY Stefano Fratini, MD, ITALY Cristina Ancarani, Stat, ITALY Piero Agostinone, MD, ITALY Alberto Grassi, PhD, ITALY Giulio Maria Marcheggiani Muccioli, MD, PhD, Associate Professor, ITALY
The Effect of Minor Adjustments to Tibial and Femoral Component Position on Soft Tissue Balance in Robotic Total Knee Arthroplasty ePoster Presentation Simon W. Young, MD, FRACS, NEW ZEALAND Matthew Carter, NEW ZEALAND Gavin William Clark, MBBS, FRACS, AUSTRALIA Christina Esposito, PhD, AUSTRALIA Matthew Walker, MBChB, FRACS, NEW ZEALAND

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Three-Dimensional Evaluation of Distal Femoral Valgus Angle Using Whole Leg CT in Total Knee Arthroplasty

Three-Dimensional Evaluation of Distal Femoral Valgus Angle Using Whole Leg CT in Total Knee Arthroplasty

Introduction

Purpose

Methods

Results

Conclusion

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Three-Dimensional Evaluation of Distal Femoral Valgus Angle Using Whole Leg CT in Total Knee Arthroplasty

Three-Dimensional Evaluation of Distal Femoral Valgus Angle Using Whole Leg CT in Total Knee Arthroplasty

Introduction

Purpose

Methods

Results

Conclusion

More 2023 ISAKOS Congress Content