AI Article Synopsis
- PCL was combined with barium sulfate particles to create biodegradable composites that show radiopacity, achieving effective imaging with just 15 wt.% BaSO.
- Thermal analysis indicated that increasing BaSO to 25 wt.% enhanced PCL crystallinity from 46% to 52%.
- Crystallization studies revealed changes in PCL crystal structure due to BaSO, boosting stiffness but having no significant impact on overall strength, likely due to debonding issues at the reinforcement interface.
Article Abstract
Poly(ε-caprolactone) (PCL) was mixed with submicron particles of barium sulfate to obtain biodegradable radiopaque composites. X-ray images comparing with aluminum samples show that 15 wt.% barium sulfate (BaSO) is sufficient to present radiopacity. Thermal studies by differential scanning calorimetry (DSC) show a statistically significant increase in PCL degree of crystallinity from 46% to 52% for 25 wt.% BaSO. Non-isothermal crystallization tests were performed at different cooling rates to evaluate crystallization kinetics. The nucleation effect of BaSO was found to change the morphology and quantity of the primary crystals of PCL, which was also corroborated by the use of a polarized light optical microscope (PLOM). These results fit well with Avrami-Ozawa-Jeziorny model and show a secondary crystallization that contributes to an increase in crystal fraction with internal structure reorganization. The addition of barium sulfate particles in composite formulations with PCL improves stiffness but not strength for all compositions due to possible cavitation effects induced by debonding of reinforcement interphase.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8125263 | PMC |
| http://dx.doi.org/10.3390/ma14092368 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Objective: The purpose of this study was to define the angiosome of a cutaneous artery arising from the caudal gluteal artery and identify landmarks for its use as an axial pattern flap.
Methods: This was an experimental anatomic study done between July 2019 and July 2021 with a retrospective review of CT scans. Twenty postcontrast CT scans in client-owned dogs, unrelated to this study, were evaluated for identification of a potential angiosome over the hip region.
Production of heterogenous bone radiopacity phantom using 3D printing.
Phys Eng Sci Med
December 2024
Faculty of Dentistry, Dentomaxillofacial Radiology Department, Ankara University, Ankara, Türkiye.
Article Synopsis
- The study focuses on creating a customizable 3D-printed bone phantom that mimics real bone radiopacity for various medical applications, including education and surgical planning.
- Researchers combined direct and indirect methods, using SLA 3D printing with a modified photoreactive resin that includes hydroxyapatite to achieve realistic bone-equivalent radiodensity.
- The resulting phantoms demonstrated comparable attenuation coefficients to real bone, indicating their effectiveness in simulating bone characteristics without significant statistical difference.
Co-Optimization of Mechanical Properties and Radiopacity Through Radiopaque Filler Incorporation for Medical Tubing Applications.
Polymers (Basel)
November 2024
PRISM Research Institute, Technological University of the Shannon, Athlone, N37 HD68 Westmeath, Ireland.
Medical tubing, particularly cardiovascular tubing, is a critical area of research where continuous improvements are necessary to advance medical devices and improve patient care. While polymers are fundamental for these applications, on their own they present several limitations such as insufficient X-ray contrasting capabilities. As such, polymer composites utilizing radiopaque fillers are a necessity for this application.
View Article and Find Full Text PDFAssessment of trochanteric vascularity using quantitative magnetic resonance imaging in a cadaveric model.
J Exp Orthop
October 2024
Orthopaedic Trauma Service, Hospital for Special Surgery, Weill Cornell Medicine New York New York USA.
Purpose: Few studies have assessed trochanteric vascularity despite its implications for bone healing and surgical approaches. This study aimed to assess the regional arterial contributions of the medial femoral circumflex artery (MFCA) versus the lateral femoral circumflex artery (LFCA) to trochanteric vascularity.
Methods: Ten adult human cadaveric pelvises to mid-femur specimens were obtained.
Artificial High- and Low-density Materials in Bone Mineral Densitometry Using Dual-energy X-ray Absorptiometry: A GATE Monte Carlo Simulation of "Black-hole" Artifact.
J Med Phys
September 2024
Department of Nuclear Medicine, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Objective: The objective of the study was to evaluate the effect of artificial high- and low-density materials on Bone mineral density (BMD)scans in dual-energy X-ray absorptiometry (DXA) method and emergence of black-hole artifact through GATE Monte Carlo simulation.
Materials And Methods: GATE Monte Carlo code was utilized to simulate the artifact encountered in clinical scans acquired by HOLOGIC bone densitometer. Two simplified phantoms were designed.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!