Takamaru Suzuki

Prediction and Improvement of Slope Angle of Machined Surface Under Constant Feed Speed Vector at the Milling Point Using Five-Axis Machining Center

Hayato Shimazaki, Kazunobu Kitajima, Shigeki Nakamura, Teruyuki Asao et autres

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Modeling and Suppression of Tilt Angle of Machined Surface under Constant Feed-Rate Vector in a Five-Axis Machining Center

Rei Watanabe, Hayato Shimazaki, Shigeki Nakamura, Takamaru Suzuki et autres

Distal Humerus Fractures in Maintenance Hemodialysis Patients with Forearm Arteriovenous Shunts: Two Case Reports

Norizumi Imazu, Kiyohito Naïto, Takamaru Suzuki, So Kawakita et autres

BACKGROUND Surgical management of distal humerus fractures in hemodialysis patients with an ipsilateral arteriovenous shunt is challenging due to shunt injury and bleeding risks. Treatment selection requires careful patient evaluation and arteriovenous fistula (AVF) preservation. This report describes 2 such cases managed …

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Regulation of nuclear transport of the transcriptional factor REST improves axon regeneration in peripheral nerves

Takamaru Suzuki, Kiyohito Naïto, Daisuke Kubota, Yuji Ueno et autres

The expression of repressor element 1 silencing transcription factor (REST) in peripheral nerves increases with age, which leads to a decline in axon regeneration. However, the detailed mechanisms behind the decline in axon regeneration with age remain to be elucidated. The present …

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Ultrasound-Driven Diagnosis of Hamate Hook Stress Fracture in Athlete: A Case Report

Sayaka Hashimoto, Kiyohito Naito, So Kawakita, Takamaru Suzuki et autres

BACKGROUND Early diagnosing a stress fracture of the hook of the hamate is challenging with plain X-rays alone. However, it is necessary to determine the appropriate treatment method to allow athletes to return to sports as soon as possible. We present a …

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Control Method of Machining Force and Machining Area in Tool Approach Aiming at Improving Machined Accuracy under a Constant Feed Speed Vector at the End-milling Point

Takamaru Suzuki, Toshiki HIROGAKI, Eiichi AOYAMA

A five-axis machining center is known for its synchronous control capability. We aimed to maintain the feed speed vector at the end-milling point by controlling two linear axes and a rotary axis with a five-axis machining center to improve the machined surface …

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Glycoprotein 130 improves repressor element‑1 silencing transcription factor‑related axon regenerative capacity in peripheral nerves with aging

So Kawakita, Kiyohito Naïto, Daisuke Kubota, Yuji Ueno et autres

Axon regenerative capacity diminishes with aging and differences in the condition of peripheral nerves between young and elderly individuals have been reported. However, the underlying pathology remains unclear. The expression of repressor element‑1 silencing transcription factor (REST) increases with age and is …

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Acute Extensor Pollicis Longus Tendon Injury Associated with a Distal Radius Fracture: A Case Report

Kenjiro Kawamura, Kiyohito Naito, Yasuhiro Yamamoto, So Kawakita et autres

BACKGROUND Extensor pollicis longus (EPL) tendon rupture is a potential complication following distal radius fracture, typically occurring several weeks after injury. Herein, we present a rare case of acute extensor pollicis longus tendon rupture associated with a distal radius fracture. CASE REPORT …

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Pathogenesis of the decrease of axon regeneration in peripheral nerve with age focus on the transcription factor REST

Kiyohito Naito, So Kawakita, Daisuke Kubota, Yuji Ueno et autres

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Levels of free thyroxine are higher in displaced pediatric supracondylar humerus fractures compared with non‑displaced fractures

Norizumi Imazu, Kiyohito Naïto, So Kawakita, Takamaru Suzuki et autres

Relationships between bone metabolic biomarkers and fracture displacement have been reported in the elderly. However, factors related to bone metabolism that predict fracture displacement remain unclear in children. The present study investigated bone metabolic biomarkers associated with the displacement of pediatric supracondylar …

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Improved Machined Accuracy Under a Constant Feed Speed Vector at the End-Milling Point Considering Machining Force and Machining Area in Tool Approach

Takamaru Suzuki, Toshiki HIROGAKI, Eiichi AOYAMA

Abstract A five-axis machining center is known for its synchronous control capability, allowing complicated three-dimensional surfaces, such as propellers and hypoid gears, to be quickly created. We aimed to maintain the feed speed vector at the end-milling point by controlling two linear …

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Improving Machined Accuracy Under a Constant Feed Speed Vector at the End-Milling Point by Estimating Machining Force in Tool Approach

Takamaru Suzuki, Toshiki HIROGAKI, Eiichi AOYAMA

A five-axis machining center (5MC) is capable of synchronous control, which makes it a feasible tool for quickly and accurately machining complicated three-dimensional surfaces, such as propellers and hypoid gears. Recently, the necessity of improving both the machined shape accuracy and the …

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