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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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
Antibiotic-Loaded Bone Cement with Colistin at Erythromycin Do Not Decrease Chronic TKA Pji at a Long-Term ePoster Presentation Daniel Pérez-Prieto, MD, SPAIN Albert Fontanellas, MD, SPAIN Pedro Hinarejos, MD, PhD, SPAIN Juan Francisco Sanchez-Soler, MD, PhD, SPAIN Raúl Torres-Claramunt, PhD, SPAIN Joan Carles Monllau, MD, PhD, Prof., SPAIN
Follow-Up after Primary Total Knee Arthroplasty with the Sigma PFC implant (DePuy Synthes Inc.) in Patients with Metal Allergy or Hypersensitivity ePoster Presentation Natalie Mengis, MD, SWITZERLAND Jules-Nikolaus Rippke, Dr. med. (MD), SWITZERLAND Sebastian Schmidt, GERMANY Tudor Daniel Cucos, MD, GERMANY Luis Alfredo Navas Contreras, MD, GERMANY Daniel Krahl, MD, GERMANY Marcus Streit, Prof., GERMANY
Intraoperative Surgeon-Performed vs. Conventional Anesthesiologist-Performed Continuous Adductor Canal Block In Total Knee Arthroplasty: A Randomized Controlled Trial ePoster Presentation Chayut Chaiperm, MD, THAILAND Srihatach Ngarmukos, MD, THAILAND Aree Tanavalee, MD, THAILAND Chotetawan Tanavalee, MD, THAILAND Wirinaree Kampitak, MD, THAILAND
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
How to Measure Physical Function in Clinical Trials on Patients Undergoing Total or Partial Knee Arthroplasty? A Systematic Review ePoster Presentation Marco Adriani, MD, ITALY Roland Becker, MD, PhD, Prof., GERMANY Aleksandra Krolikowska, PhD, Prof., POLAND Krzysztof Lachowski, MD, GERMANY Robert Prill, PhD, GERMANY
Incidence and Prevention of Deep Vein Thrombosis Using Thromboprophylaxis in Total Knee Replacement: A Prospective Clinical Study ePoster Presentation Amit Lakhani, MS, DNB, MRCPS(Glassg), MNAS, INDIA
Anatomical distribution of radiological OA Influences the Outcome of TKA ePoster Presentation Johanna Elliott, MB, BS, B.Med Sci, Master Science, GERMANY
Changes In CPAK Classification and Its Characteristics before and after Kinematic Alignment TKA ePoster Presentation Manabu Akagawa, MD, PhD, JAPAN ヒデトモサイトウ, MD, PhD, JAPAN Naohisa Miyakoshi, MD, PhD, JAPAN
Participation of Physical Activity Following Knee Arthroplasty: A Meta-Analysis ePoster Presentation Ahmed A Magan, BM BSc (Hons) MRCS (Eng) FRCS (Eng) Trauma & Orth, UNITED KINGDOM Babar Kayani, BSc (HONS), MBBS, MRCS (Eng), UNITED KINGDOM Warran Wignadasan, MBBS, BSc (Hons), MRCS, UNITED KINGDOM Dia Eldean Giebaly, MBChB, MSc, FRCS, EMBA, UNITED KINGDOM Flaminia Ronca, PHD, UNITED KINGDOM Fares S. Haddad, MCh(Orth), BSc, FRCS(Orth), UNITED KINGDOM
"The Other Partial Knee"- Milling System Technique for Patellofemoral Arthroplasty in 250 Patients ePoster Presentation Alexander P. Sah, MD, UNITED STATES

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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