Effect of Porous Microstructures on the Biomechanical Characteristics of a Root Analogue Implant: An Animal Study and a Finite Element Analysis.

Background: Full ceramic or metal custom-made root analogue implants (RAIs) are made by replicating the natural tooth geometry. However, it may lead to the stress shielding of the surrounding bone, and an RAI is unable to easily achieve primary stability. Therefore, to improve primary stability and reduce stress shielding, RAI porous structures are proposed.

Effects of immediately static loading on osteointegration and osteogenesis around 3D-printed porous implant: A histological and biomechanical study.

The 3D-printed porous implant is capable of achieving favorable osteointegration and osteogenesis in the absence of mechanical stimulation during the early healing period. The purpose of this study is to evaluate the impact of immediately static loading on bone osteointegration and osteogenesis around the 3D-printed porous implant. Thirty porous implants with optimal configuration were installed bilaterally into femurs of 15 rabbits.

Biomechanical comparison of implant inclinations and load times with the all-on-4 treatment concept: a three-dimensional finite element analysis.

The purpose of this study was to compare the effects of implant inclinations and load times on stress distributions in the peri-implant bone based on immediate- and delayed-loading models. Four 3D FEA models with different inclination angle of the posterior implants (0°, 15°, 30°, 45°) were constructed. A static load of 150 N in the multivectoral direction was applied unilaterally to the cantilever region.

Environmental tobacco smoke exposure and Chinese schoolchildren's respiratory health: a prospective cohort study.

Background: Although China is the most coveted cigarette market worldwide, few studies have examined the longitudinal effects of environmental tobacco smoke (ETS) on health.

Purpose: To examine the relationship between exposure to ETS and respiratory health in Chinese schoolchildren.

Methods: The study subjects included 1718 children, who were never-smokers, aged 10.

Physical activity, cardiorespiratory fitness, and obesity among Chinese children.

Objective: To investigate the relationships of cardiorespiratory fitness (CRF) and physical activity (PA) with the risk of overweight/obesity in Chinese schoolchildren.

Methods: A total of 1795 children aged 8-13 years at baseline were followed-up for 18 months from 2006 to 2008 in Guangzhou, China. Children were categorized as "normal weight", "overweight", and "obese" using Chinese obesity cut-off points.

Nutrition and children's respiratory health in Guangzhou, China.

Objective: To investigate the role of nutrition in children's respiratory health in subjects participating in a study on air pollution and respiratory health.

Study Design: Cross-sectional survey.

Methods: The relationships between consumption of fresh fruit, vegetables and milk and pulmonary function (forced expiratory volume in 1 s, FEV(1)) and respiratory symptoms (phlegm with cold, phlegm without cold, cough with cold, and cough without cold) were examined in 2228 children (age 10.

Colorectal cancer among Chinese restaurant waiters.

To investigate whether Chinese restaurant waiters in Hong Kong had an increased risk of dying from colorectal cancer, we linked the records of deceased union members to the mortality information for the general population between 1986 and 1995. A case-control analysis among the deceased was performed with 346 deceased waiters and 306 deceased male kitchen workers. Waiters were found to have a significantly higher mortality odds ratio [(MOR) 2.