Summary: Excessive joint line obliquity can occur when calipered KA TKA is performed in Japanese patients with varus OA knees, and surgeons should consider employing modifications when determining the coronal alignment of the proximal tibial cut for calipered KA TKA in these patients.

Background

Calipered kinematically aligned total knee arthroplasty (KA TKA) has been reported to provide promising clinical results and higher long-term survival rates. The tibia is prone to excessive varus deformity in the Japanese population, which can cause excessive joint line obliquity after calipered KA TKA. The purpose of this study was to elucidate the joint line angle on the distal femur and proximal tibia in patients undergoing TKA in Japan and to determine the risk of significant obliquity of the osteotomy surface using the calipered KA TKA method.

Methods

Forty-four patients (50 consecutive knees) with osteoarthritis (OA) awaiting TKA were chosen as study participants. We simulated the calipered KA TKA measurements based on preoperative computed tomography (CT) images using planning software (ZedKnee; LEXI, Tokyo, Japan). Surgical simulation was performed using LEGION CR. After considering the 9-mm thickness of the implants and 2-mm thickness of the cartilage, the distal and posterior femur and proximal tibia were resected at 7 mm. We investigated the lateral distal femoral angle (LDFA), medial proximal tibial angle (MPTA), and hip-knee-ankle angle (HKA) from the simulated calipered KA TKA measurements.

Results

The mean MPTA was -5.9° ± 2.5° (-11.8° to -0.5°), and 68% of patients showed a MPTA of < -5°. The mean LDFA was 2.4° ± 3.1° (-6.6° to 10.3°), and 20% of patients showed an LDFA of > 5°. The mean HKA was -3.6° ± 3.6° (-10.6° to 2.8°), with 38% of patients showing a HKA of < -5°.

Conclusions

Excessive joint line obliquity can occur when calipered KA TKA is performed in Japanese patients with varus OA knees. Surgeons should consider modifications when determining the coronal alignment of the proximal tibial cut for calipered KA TKA in these patients.

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Does Robotic Assisted Unicompartmental Knee Arthroplasty Restore Native Jointline More Accurately Than With Conventional Instruments? ePoster Presentation Ashok Kumar Podhili Subramani, MS, INDIA Shantanu S. Patil, MBBS, MS(Orth), INDIA SAWAN PAWAR, MBBS MS (ORTH), INDIA Kalaivanan Kanniyan, MBBS MS Orth, INDIA karthik jayachandran, MS, INDIA PICHAI SURYANARAYAN, MBBS MS ORTH, INDIA
Modular Knee Arthrodesis as Definitive Treatment for Periprosthetic Infection, Bone Loss, and Failure of the Extensor Mechanism after Total Knee Arthroplasty ePoster Presentation Gloria Shoshana Coden, MD, UNITED STATES Maksym Bartashevskyy, BA, UNITED STATES Zachary Berliner, MD, UNITED STATES Ruijia Niu, MPH, UNITED STATES James V. Bono, MD, UNITED STATES Ayesha Abdeen, MD, UNITED STATES Eric L. Smith, MD, UNITED STATES
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
Impact of Femur Correction on the Mechanical Alignment of the Total Knee Prosthesis ePoster Presentation Israel Alejandro González Rizo, MD, MEXICO Fidel G Dobarganes, Prof, MEXICO Jorge Negrete Corona, MD, MEXICO Alberto Guevara-Alvarez, MD, MEXICO Franco Garcini Munguia, MD, MEXICO
Same Complication Rate After Day-Case Procedure Or Fast-Track Procedure After Total Hip And Knee Arthroplasty. A Prospective, Propensity Score-Matched Case-Control Study ePoster Presentation Jean-Yves Jenny, Prof., FRANCE Vincent Gisonni, MD, FRANCE
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
Is Surgeon Assessed Bone Quality During Total Knee Arthroplasty a Valid Tool To Diagnose Osteoporosis ? ePoster Presentation Adit Maniar, MBBS, MS Orthopaedics, DNB Orthopaedics, CANADA 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
Compliance and Outcome of Osteoporosis Treatment After Total Knee Arthroplasty ePoster Presentation Yun Seong Choi, MD, KOREA, REPUBLIC OF Seung Hoon Lee, MD, KOREA, REPUBLIC OF Jung Ro Yoon, MD, KOREA, REPUBLIC OF Young Bin Shin, MD, KOREA, REPUBLIC OF Tae Hyuk Yoon, MD, KOREA, REPUBLIC OF
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
Golfers Have Greater Preoperative and Equal Postoperative Function When Undergoing Total Knee Arthroplasty Compared to Non-Golfers ePoster Presentation Patrick G Robinson, MBChB, MRCS, MS, MBA, UNITED KINGDOM Robert Kay, MBChB, UNITED KINGDOM Deborah Macdonald, BA(Hons), UNITED KINGDOM Andrew Murray, MBChB, FFSEM, UNITED KINGDOM Nick David Clement, MBBS, MD, PhD, FRCS(Orth), UNITED KINGDOM

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Calipered Measurements Method For Kinematically Aligned Total Knee Arthroplasty Has A Risk Of Excessive Varus Cut For The Proximal Tibia In Japanese Varus Knees

Calipered Measurements Method For Kinematically Aligned Total Knee Arthroplasty Has A Risk Of Excessive Varus Cut For The Proximal Tibia In Japanese Varus Knees

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Calipered Measurements Method For Kinematically Aligned Total Knee Arthroplasty Has A Risk Of Excessive Varus Cut For The Proximal Tibia In Japanese Varus Knees

Calipered Measurements Method For Kinematically Aligned Total Knee Arthroplasty Has A Risk Of Excessive Varus Cut For The Proximal Tibia In Japanese Varus Knees

Background

Methods

Results

Conclusions

More 2023 ISAKOS Congress Content