Performance evolution of the Nano Boron nitride enhanced bone cement composites.

Bone cement is a research hotspot and has been partially applied in the field of bone repair thanks to the good mechanical, physical and antibacterial properties. However, the easy wear and high temperature during curing characteristics would cause surrounding tissue necrosis, which seriously limits the wider application to some extent. In this work, the hexagonal boron nitride (h-BN) nano flakes were optimized to enhance the bone cement matrix (PMMA) via mechanical doping.

The accuracy of the 3D-printed navigation template for the location of tibial tunnel in posterior cruciate ligament reconstruction: an in-vitro experimental study.

Ten porcine tibiae were scanned by computed tomography (CT) and the three‑dimensional (3D)-printed navigation template for posterior cruciate ligament (PCL) reconstruction was designed using the Rhinoceros software. The outcomes of the control group and experimental group were obtained from the preoperative design and the navigation template, respectively. This paper focuses on evaluating the accuracy of the 3D-printed navigation template used to assist the anatomical location of tibial tunnel in PCL reconstruction in an in-vitro experimental study.

Quantitative analysis of sagittal curvatures of the tibial plafond by computed tomography.

Background: Although the talar morphology has been well understood, studies on the corresponding tibial plafond are still lacking. Based on computed tomography (CT) data, this quantitative study divided the tibial plafond into anterior and posterior regions on five sagittal sections. The objectives of this study were (I) to determine whether the sagittal curvatures of the tibial plafond can be quantitatively and accurately described using the double-diameter method; (II) to compare the difference between the anterior and posterior diameters on five sagittal sections.

The Relationship Between Sarcopenia, Cognitive Impairment, and Cerebral White Matter Hyperintensity in the Elderly.

Purpose: To explore the relationship between sarcopenia-related indices, cognitive impairment and cerebral white matter hyperintensities.

Patients And Methods: Ninety-five hospitalized older adults aged 60 years and older were used in this study. Three sarcopenia-related indicators were measured: hand grip strength (Measured with a spring-type dynamometer), gait speed (6m step speed method), and appendicular skeletal muscle mass (ASM, bioelectrical impedance).