[Road traffic injuries in developing countries: research and action agenda].

Road traffic injury (RTI) is the leading cause of death in persons aged 10-24 worldwide and accounts for about 15% of all male deaths. The burden of RTI is unevenly distributed amongst countries with over eighty-fold differences between the highest and lowest death rates. Thus the unequal risk of RTI occurring in the developing world, due to many reasons, including but not limited to rapid motorization and poor infrastructure, is a major global challenge.

Web 2.0 and internet social networking: a new tool for disaster management?--lessons from Taiwan.

Background: Internet social networking tools and the emerging web 2.0 technologies are providing a new way for web users and health workers in information sharing and knowledge dissemination. Based on the characters of immediate, two-way and large scale of impact, the internet social networking tools have been utilized as a solution in emergency response during disasters.

[Research of morphology for the toothmark in pocket limb].

Objective: The purpose of this study was to observe the morphological changes of toothmarks in pocket limbs and to explore the durative development of bitemarks.

Methods: Firstly a toothmark model was established by using a universal testing machine and a self-made incisor nod which was pressed particularly on pocket limbs. The changes of toothmarks were observed on alive and dead animals with time elapsing.

[FTIR and XRD analysis of hydroxyapatite from fossil human and animal teeth in Jinsha Relict, Chengdu].

Diagenetic effect during burial on the hydroxyapatite in enamel and dentin from fossil human and animal teeth was examined, using X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). For the enamel and dentin of all fossil teeth, XRD patterns exhibit bulge line and overlap between major reflections of hydroxyapatite, and the crystallinity of hydroxyapatite is low. For each infrared spectrum, H2O and OH(-) have distinct peaks of absorbance, and PO4(3-) and CO3(2-) ions have intensive infrared vibration modes at the fundamental wave numbers.

[Cyclic fatigue of Vita mark II machinable ceramics under Hertzian's contact].

Objective: To investigate the cyclic fatigue modes of Vita mark II machinable ceramics under Hertzian's contact.

Methods: Hertzian's contact technique (WC spheres r = 3.18 mm) was used to investigate the cyclic fatigue of Vita mark II machinable ceramic.

[A comparative study on cyclic and static fatigue of dental ceramic by means of Hertzian's contact].

Objective: To compare the difference in strength degradation and morphology damage of brittle dental ceramic after static load and cyclic fatigue.

Methods: Hertzian's contact technique with a tungsten carbide sphere was used to investigate the response of feldspathic dental porcelain to static load and cyclic fatigue. All specimens were subjected to static or cyclic loading in moist environment.