Publications by authors named "Isato Sekiya"

Purpose: Proximal humeral fractures cause large intramedullary bone defects after humeral-head reduction. Hydroxyapatite/poly-L-lactide (HA/PLLA) materials are widely used for various fractures. However, the efficacy of endosteal strut using a HA/PLLA mesh tube (ES-HA/PLLA) with a locking plate for treating proximal humeral fractures was not reported.

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Article Synopsis
  • Hydroxyapatite (HA) augmentation is evaluated for its effectiveness in treating trochanteric femoral fractures, involving a study of 85 patients, with 45 receiving HA and 40 not receiving it.
  • The study measured various factors including insertion torque of lag screws, bone mineral density, and screw telescoping after surgery, with results showing that the HA group had better outcomes than the non-HA group regarding stability and screw movement.
  • All fractures in the study healed without complications, suggesting that HA augmentation improves resistance to instability and can enhance treatment for trochanteric femoral fractures.
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We describe the wiring technique and evaluate the radiographic and clinical outcomes of treatment with a pin and wire system (PWS) for comminuted patella fractures. From June 2013 to October 2018, 33 patients with comminuted patella fractures were treated using a PWS. Open reduction and internal fixation was performed with multiple pins and a wire.

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Background: Forged unsintered hydroxyapatite and poly l-lactic acid F-u-HA/PLLA) screw is bioactivite, bioabsorbable, and radiopaque with high mechanical strength. Its efficacy has been previously demonstrated in the treatment of lateral humeral condylar, lateral tibial condylar, ankle, and patellar fractures. However, studies on its efficacy in treatment of calcaneal fractures is lacking.

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Article Synopsis
  • A study examined the impact of hydroxyapatite (HA) augments on the effectiveness of surgical treatment for intertrochanteric femoral fractures in 58 patients, divided into two groups: one receiving HA treatment and the other not.
  • Results showed that the HA group had a significantly higher mean torque/BMD ratio during lag screw insertion compared to the non-HA group, indicating more effective insertion.
  • Additionally, the HA group experienced lower telescoping of the lag screw post-surgery, suggesting better stability, although no significant differences were noted on changes in the neck shaft angle between the two groups.
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Introduction: Trochanteric femoral fracture is one of the most common fractures in the elderly. Trochanteric femoral fracture with involvement of the lesser trochanter is considered unstable and recognized as having a poor prognosis. However, fixation of lesser trochanter fragment is scarce because of technical difficulties.

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Background: Forged composites of raw particulate unsintered hydroxyapatite/poly-L-lactide (F-u-HA/PLLA) implants are widely used in surgeries because they possess high mechanical strength, bioactivity, and radio-opacity. We previously reported that F-u-HA/PLLA implants were useful for treating lateral tibial condylar, lateral humeral condylar, and ankle fractures. The study aim was to investigate the efficacy of F-u-HA/PLLA cannulated screws and FiberLoop® for treating transverse patellar fractures.

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Background/aim: Although some patients with enchondroma have multiple lesions, no study has investigated the distribution of lesions in patients with multiple enchondromas.

Patients And Methods: This retrospective study included 118 patients with enchondroma of the hand. The incidence and characteristic feature of multiple enchondromas of the hand were investigated.

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Background: Arthroscopy is a widely used minimally invasive technique. Nevertheless, no report describes the arthroscopic anatomy of the proximal interphalangeal (PIP) joint for portal creation. To facilitate arthroscopy, this study elucidated the anatomy of the lateral bands of the extensor mechanism and collateral ligaments of PIP joints.

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Early active mobilization after hand surgery is extremely important for preventing scar tissue and adhesion. We examined four patients for whom continuous peripheral nerve blocks (CPNB) were used during and after hand surgery. This method was used for three median nerves and one ulnar nerve.

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This article describes the authors' experience with, and recent advancement in, the techniques that have allowed the development of many new arthroscopic procedures in the finger joints. It also describes the role and techniques of arthroscopy in small finger joints. Because the intra-articular anatomy of the first to the fifth metacarpophalangeal (MCP) joints is similar, this article discusses the hand MCP joints without distinguishing thumb from fingers.

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Background: The peroneal tubercle is a small bony ridge located on the lateral wall on the calcaneus immediately inferior to the lateral malleolus and separates the peroneus brevis and peroneus longus tendons. The size and configuration of the peroneal tubercle has been implicated in the pathogenesis of peroneal tendon tears and tenosynovitis and is the increasing object of clinical interest. However, the morphology of the tubercle is difficult to assess with precision.

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Soft tissue coverage around the knee has persisted as a challenge for plastic and reconstructive surgeons. The distally-based anterolateral thigh flap is often used for coverage. Nevertheless, few anatomical studies have investigated the retrograde vascular pedicle.

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Autologous nerve graft is the most commonly applied treatment for the patients with peripheral nerve defect, while application is limited because of tissue availability and unfavorable donor site morbidity. To overcome this problem, peripheral nerve regeneration using a nerve conduit has been studied. Especially, nerve conduit using biodegradable materials has been considered promising.

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Few reports about clinical experience in arthroscopy of finger joints exist. Furthermore, little attention has been given to arthroscopic synovectomy of rheumatoid fingers. Herein, we describe our experience with arthroscopic synovectomy of metacarpophalangeal (MCP) and proximal interphalangeal (PIP) joints in patients with rheumatoid arthritis.

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Study Design: Evaluation of diagnostic imaging.

Objective: To comprehend anatomic relationships between the internal carotid artery (ICA) and bicortical purchase of C1 lateral mass screws from the perspective of avoiding ICA injury.

Summary Of Background Data: No studies have evaluated safety trajectory of atlantal lateral mass screw that would avoid the ICA injury in relation to its location, although previous studies have indicated concern about ICA injury by the screw tip at the anterior surface of the lateral mass of the atlas.

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Forty-four lower limbs preserved in formaldehyde from cadavers of adult Asians were used. In all specimens 1-5 perforating branches from the medial sural artery were found. No perforators were found higher than 5 cm or lower than 17.

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An aneurysmal bone cyst is a benign solitary lesion of unknown etiology. A case report is presented of recurrence of an aneurysmal bone cyst in the foot that was treated with endoscopic curettage without bone grafting. Bone remodeling and bone formation were completed in the early stages postsurgically.

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Purpose: To describe our experience with arthroscopy of the proximal interphalangeal (PIP) and metacarpophalangeal (MP) joints and to assess the value of this technique.

Type Of Study: Case series.

Methods: Arthroscopy was performed on 27 PIP joints and 16 MP joints of 21 patients with rheumatoid arthritis (mean age, 47.

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