Control of Orthodontic Tooth Movement by Nitric Oxide Releasing Nanoparticles in Sprague-Dawley Rats.

Unlabelled: Orthodontic treatment commonly requires the need to prevent movement of some teeth while maximizing movement of other teeth. This study aimed to investigate the influence of locally injected nitric oxide (NO) releasing nanoparticles on orthodontic tooth movement in rats.

Materials And Methods: Experimental tooth movement was achieved with nickel-titanium alloy springs ligated between the maxillary first molar and ipsilateral incisor.

Colorectal cancer surgery of octogenarians in Hong Kong: who will survive?

OBJECTIVE. To assess the accuracy of the Association of Coloproctology of Great Britain and Ireland scoring system in predicting the 30-day mortality after surgery for colorectal cancer in Hong Kong elderly (aged 80 years or more) patients. DESIGN.