Shuji Taketomi

Age-stratified risk of major systemic complications following unicompartmental versus total knee arthroplasty: a nationwide cohort study

Manabu Kawata, Shotaro Aso, Kohei Kawaguchi, Ryota Yamagami et autres

BACKGROUND: The optimal surgical approach for knee arthroplasty remains under debate regarding reducing systemic complications. Although unicompartmental knee arthroplasty (UKA) is generally considered less invasive than total knee arthroplasty (TKA), it remains unclear whether this advantage persists across age groups. This study …

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Development of arthroscopy: contributions of Masaki Watanabe and Japan

Shuji Taketomi, S Shinichi TANAKA

The history of arthroscopy in Japan occupies a pivotal position in the global evolution of modern orthopaedic surgery. Its foundations were established by Kenji Takagi, who in 1918 became the first to visualize the knee joint cavity of a cadaver using a …

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In vivo three‐dimensional kinematics in unicompartmental knee arthroplasty: A sports activity cluster analysis

Kenichi Kono, Ryota Yamagami, Kohei Kawaguchi, Hiroshi Inui et autres

Abstract Purpose The specific kinematics relevant to sports activities after unicompartmental knee arthroplasty (UKA) remain unclear. We aimed to clarify the kinematic factors associated with sports activities after UKA. Methods Twenty‐five knees that had undergone UKA were examined fluoroscopically during squatting (weight‐bearing …

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The effect of weight-bearing status on kinematics and cruciate ligament force in normal knees

Kenichi Kono, Ryo Murakami, Tomofumi Kage, Takaharu Yamazaki et autres

Evaluating WB status during normal knee flexion activities is important for optimizing surgical procedures and postoperative rehabilitation. This study aimed to clarify the effects of weight-bearing (WB) on in vivo knee kinematics and cruciate ligament forces in normal knees. Fluoroscopic imaging in …

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Relationship Between Anterior Cruciate Ligament Injury and Meniscus-Bone Angle

Sora Koiwa, Shuichi Nakayama, Shuji Taketomi, Yuri Furukawa et autres

Background: The meniscus-bone angle (MBA), defined as the angle formed by the lateral meniscus with respect to the lateral tibial slope, has recently been identified as an intrinsic factor associated with primary anterior cruciate ligament (ACL) injuries. However, no studies have investigated …

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Efficacy of functional alignment in total knee arthroplasty in restoring in vivo cruciate ligament forces and knee kinematics compared with mechanical alignment

Kenichi Kono, Hiroshi Inui, Tomofumi Kage, Takaharu Yamazaki et autres

PURPOSE: The impact of coronal alignment on cruciate ligament forces in bicruciate-retaining total knee arthroplasty (TKA) remains unclear. We aimed to clarify in vivo cruciate ligament forces and knee kinematics among mechanically aligned (MA) and functionally aligned (FA) TKAs and normal knees. …

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Functional alignment maintains constant medial stability and a more distinct medial pivot pattern throughout flexion compared to mechanical alignment in medial pivot total knee arthroplasty

Takashi Kobayashi, Kenichi Kono, Tomofumi Kage, Takaharu Yamazaki et autres

Abstract Purpose To investigate whether functional alignment (FA) leads to differences in in vivo kinematics and early clinical outcomes compared to mechanical alignment (MA) in patients undergoing total knee arthroplasty (TKA) using a medial pivot (MP) prosthesis. Methods Forty patients (20 MA …

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Patients aged 80 and above face higher critical systemic complication rates after single-stage bilateral versus unilateral total knee arthroplasty: a nationwide database analysis

Manabu Kawata, Shotaro Aso, Ryota Yamagami, Kenichi Kono et autres

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Intraoperative kinematics of the bicruciate retaining TKA using functional alignment and their influence on the clinical outcomes

Hiroshi Inui, Ryota Yamagami, Kenichi Kono, Kohei Kawaguchi et autres

BACKGROUND: Our surgical team has been performing bicruciate-retaining total knee arthroplasty (BCR-TKAs) with functional alignment (FA). This study aimed to investigate knee kinematics before and after FA BCR-TKA, as well as the influence of these changes on clinical outcomes. METHODS: Fifty cases …

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Anatomical and component rotational mismatches negatively affect postoperative outcomes in total knee arthroplasty

Kohei Kawaguchi, Ryota Yamagami, Kenichi Kono, Junfeng Zhang et autres

Abstract Purpose Anatomical rotational mismatch (ARM) refers to postoperative malrotation between the femur and tibia, and component rotational mismatch (CRM) refers to malrotation between the femoral and tibial components in total knee arthroplasty (TKA). This study aimed to quantify ARM and CRM …

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Characteristics of Plantar Pressure Distribution During Running and Musculoskeletal Factors Associated With Jones Fracture in Young Female Soccer Players: A Prospective Study

Seira Takei, Shuji Taketomi, Kohei Kawaguchi, Yuri Mizutani et autres

Background: Jones fracture of the fifth metatarsal is a common overuse injury in soccer players and may cause long-term absence from training. Despite the increasing population of female soccer players, the incidence and risk factors of Jones fracture, including plantar pressure characteristics, …

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Impact of postoperative nutritional status on the patients’ clinical outcomes and knee biomechanics following total knee arthroplasty in Japan: a prospective cohort study

Kenichi Kono, Tetsuya Tomita, Takaharu Yamazaki, Masashi Tamaki et autres

Purpose: The impact of postoperative nutritional status on clinical outcomes and biomechanics following total knee arthroplasty remains largely unknown. This study aimed to assess this question using the prognostic nutritional index to evaluate the nutritional status of orthopedic participants.Methods: Patients with knee …