A Radiopaque Nanoparticle-Based Ink Using PolyJet 3D Printing for Medical Applications.

The aim of this study was to develop a 3D printable radiopaque ink and successfully print a finished artifact. Radiopaque 3D printing would be hugely beneficial to improve the visibility of medical devices and implants, as well as allowing more realistic phantoms and calibration aids to be produced. Most 3D printing technologies are polymer based. Polymers are naturally radiolucent, allowing X-rays to pass through, showing up as faint dark gray regions on X-ray detectors, as for soft tissues. During this study, a 3D printable ultraviolet (UV) curable resin containing zirconium oxide (ZrO2) nanoparticles was developed. 5 wt.% ZrO2 was dispersed in a base resin using a high-shear mixer. Particles remained in suspension for 6-8 h at room temperature, allowing time for 3D printing. A model of a hand including radiopaque bones and a test block demonstrating a range of internal radiopaque features were successfully 3D printed. Radiopacity was demonstrated in the 3D-printed models, and there was good dispersion of ZrO2 within the resin matrix. The impregnated resin remained UV curable and viscosity was not compromised. In this study, 3D-printed radiopaque features demonstrated clear radiopacity under X-ray and microcomputed tomography imaging.

Patient perspectives on health, health needs, and health care services in a rural Irish community: a qualitative study.

INTRODUCTION: There is evidence that living in a rural environment confers certain health advantages in terms of health and wellbeing. However, there is limited knowledge of patients' perspectives on determinants of health in rural areas. The aim of the present study was to explore determinants of health, health needs, and healthcare services in a rural community in the west of Ireland. METHODS: Semi-structured interviews were carried out on a purposeful sample of 12 participants who presented to a community medical centre during a designated 14 day period in May 2010. The often interwoven conceptual themes identified during analysis of the data included 'community', 'environment', 'familiarity', 'accessibility', and 'expectations'. RESULTS: The advantages of living in a rural environment included the strong sense of community, the benefits of the natural environment, familiarity, and a general sense of satisfaction in life. Issues of geographical inaccessibility and availability of affordable food were highlighted as disadvantages. In addition, hesitation was expressed about confiding mental health issues to medical professionals. CONCLUSIONS: The rural environment and sense of community with its associated strong social networks were identified as key determinants of good mental and physical health. However, the inaccessibility to mental health care and reluctance to seek help for mental health issues remain a significant problem in rural areas. In considering priorities for health, greater effort and resources are required to increase public awareness and change attitudes to mental health issues.