Publications by authors named "Takushi Nakatani"

Article Synopsis
  • A new 3D camera system was developed to track motion in a surgical field, potentially allowing for augmented reality (AR) integration without the invasive markers traditionally used.
  • The system's effectiveness was tested using a forearm bone model to compare its real-time tracking accuracy with a 3D model created from CT data.
  • Improvements made to the tracking system included changes in color processing, marker size, and frame-by-frame stabilization, resulting in enhanced positional detection accuracy.
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Background: This study aimed to investigate the relationship between femoral neck fractures and sarcopenia.

Methods: This was a retrospective analysis of 92 patients with femoral neck fractures, from September 2017 to March 2020, who were classified into high ambulatory status (HG) and low ambulatory status (LG) groups. Ambulatory status was assessed before surgery, one week after surgery, at discharge, and during the final follow-up.

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Article Synopsis
  • The study aimed to identify risk factors for developing radiolucent lines (RLLs) around the acetabular component in patients who underwent total hip arthroplasty (THA) using an interface bioactive bone cement technique, focusing on the first year post-surgery and longer-term impacts at five and ten years.
  • A review of 980 primary cemented THAs revealed that 27.2% of patients exhibited RLLs one year after surgery, with specific factors like atrophic osteoarthritis and smaller head diameters significantly increasing the risk, while structural bone grafts and proper hip center location reduced it.
  • Long-term analysis showed a high survival rate of acetabular components over ten years, with no
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Introduction: A well-fixed cement-bone interface is a crucial factor for acetabular and femoral components in cemented total hip arthroplasty (THA). The aim of the present study was to evaluate the middle-term clinical and radiological results of fixing the acetabular component with an interface bioactive bone cement (IBBC) technique in primary cemented THA.

Materials And Methods: We undertook a retrospective review was undertaken of 193 primary cemented THAs in 174 patients using acetabular components cemented with an IBBC technique and followed for a minimum of 5 years (mean 8.

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Introduction: Ceramic-on-ceramic (COC) total hip arthroplasty (THA) was developed to reduce wear debris, and consequently the occurrence of osteolysis and aseptic loosening. The purpose of the present study was to determine the incidence and natural history of noise including squeaking after COC THA, and to clarify whether clinical outcomes and any demographic and implant-related factors are associated with noise from these ceramic bearings.

Methods: This was a retrospective observational study of 137 primary COC THAs between 2004 and 2009 at our institute.

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AO/OTA type 31-A1.2 intertrochanteric femoral fractures generally are considered stable intertrochanteric fractures. We report a case of an unstable AO/OTA type 31-A1.

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Introduction: Little is known about the association between well-fixed polished tapered cemented stems (PTCS) implanted by the line-to-line technique and changes of stem migration, or the change of functional anteversion of the femur after total hip arthroplasty (THA).

Materials And Methods: This retrospective study included 422 two-stage bilateral primary THAs performed using PTCS implanted by the line-to-line technique. CT scans were made on both the target side (first postoperative CT) and on the contralateral side (second postoperative CT) 1 week postoperatively.

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Human papillomaviruses (HPVs) are associated with proliferative lesions in a variety of human epithelial types. A 38-year-old female presented with a diagnosis of urethral condyloma acuminatum. She underwent transurethral resection of the urethral condyloma.

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