Publications by authors named "T Nakasa"

Importance: Osteochondral lesions of the talus (OLT) with an osteochondral fragment are amendable for fixation. Fixation aims to stabilize the osteochondral fragment while retaining the native cartilage. Though fixation for OLT is a promising treatment, no systematic overview of the literature on its efficacy and safety exists.

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Background: Postoperative osteolysis may be observed around poly-l-lactic acid (PLLA) pins in osteochondral fragments fixation for an osteochondral lesion of the talus (OLT). Hydroxyapatite (HA) improves biocompatibility, osteoconductivity, and mechanical strength when added to PLLA. This study aimed to compare the characteristics of osteolysis and clinical outcomes of fixation for OLT with PLLA pins vs PLLA/HA pins.

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Article Synopsis
  • Chronic stress on the second metatarsal head in patients with hallux valgus can lead to osteoarthritis and dislocation of the second metatarsophalangeal joint.
  • A study analyzed 115 HV feet, separating them into two groups based on dislocation presence and further categorizing those without dislocation by osteoarthritis status.
  • Results indicated that greater protrusion of the second metatarsal and specific angles were linked to higher risks of dislocation and osteoarthritis in the joint.
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Heterotopic ossification (HO) in Achilles tendon often arises due to endochondral ossification during the healing process following trauma. Retinoic acid receptor γ (RARγ) plays a critical role in this phenomenon. This study aims to elucidate the therapeutic effects of CD1530, an RARγ selective agonist, along with the contributing cells, in Achilles tendon healing, utilizing a cell lineage tracing system.

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The level of dynamic mechanical instability between the bony parts of the ankle joint provides important information on biomechanical function. However, the dynamics of the distance between the talus and lateral malleolus during gait remain unclear. This study aimed to compare the distance between the talus and lateral malleolus and the ankle joint angles during the stance phase of gait between individuals with chronic ankle instability (CAI) and healthy adults.

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