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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Use of Tibial Stem for Patients with Morbid Obesity in Total Knee Arthroplasty ePoster Presentation José Eduardo Flores Naranjo, MD, MEXICO Adrian Aziz Cortes De La Fuente, MD, MEXICO Octavio Martinez Montiel, MD, MEXICO Fernando Martinez Zuñiga, MD, MEXICO
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
Phenotypic Differences In Coronal Alignment In Robot-Assisted Total Knee Arthroplasty Do Not Affect Patient-Reported Outcome Measurements In A Three-Dimensional Computed Tomography Analysis: A Single-Center Cohort Study ePoster Presentation Takao Kaneko, MD, PhD,, JAPAN Ayakane Yamamoto, MD, JAPAN Kazutaka Takada, MD, JAPAN Shu Yoshizawa, MD, JAPAN Hiroyasu Ikegami, 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
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
Quality of Life Following Primary Total Knee Arthroplasty: Factors Predicting Satisfaction in Low-Income Population ePoster Presentation Mohamed Amine Gharbi , MD, TUNISIA Houssem Eddine Chahed, MD, TUNISIA Ahmed Zendeoui, MD, TUNISIA Moatassem Belleh Jelassi, MD, TUNISIA Anis Tebourbi, MD, TUNISIA Ramzi Bouzidi, PhD, TUNISIA Khelil Ezzaouia, PhD, TUNISIA Mouadh Nefiss, MD, TUNISIA
Time-Driven Activity-Based Costs for Manipulation Under Anesthesia after Total Knee Arthroplasty ePoster Presentation Gloria Shoshana Coden, MD, UNITED STATES Suzanne Kent, MD, UNITED STATES John Mazzocco, MD, UNITED STATES Lauren Schoeller, BS, UNITED STATES Ruijia Niu, MPH, UNITED STATES Daniel C Sun, UNITED STATES Eric L. Smith, MD, UNITED STATES
Anatomical distribution of radiological OA Influences the Outcome of TKA ePoster Presentation Johanna Elliott, MB, BS, B.Med Sci, Master Science, GERMANY
Evaluation of The Safety And Efficacy of The Fully Automated Active Robotic System In Robotic Assisted Total Knee Arthroplasty ePoster Presentation Sanjay B. Londhe, MS, FRCS, FRCSI, MCh, INDIA Santosh Chandrashekar Shetty, MS, INDIA Ashit Hasmukhbhai Shah, FRCS Orth, M ChOrth, M S Orth, D N B Orth, INDIA Niraj Vora, MS,MRCS, INDIA Vijay Shetty, MD, MSc, FRCSC, INDIA Rakesh Nair, MS, INDIA Clevio Joao Baptista Desouza, MD, INDIA Farheen Khan, B.Tech, INDIA

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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