Heavy metals in drinking water and periodontitis: evidence from the national oral health survey from China.

Background: Periodontitis has become an increasingly important public health issue, coupled with a high economic burden for prevention and treatment. Exposure to essential trace heavy metals has been associated with various diseases; however, the relationships between essential trace heavy metals and periodontitis remain inconclusive.

Objectives: To investigate the association between essential trace heavy metals in tap water and periodontitis in a nationally representative sample in China.

Decomposing socioeconomic inequalities in dental caries among Chinese adults: findings from the 4th national oral health survey.

Objective: This cross-sectional study aimed to investigate socioeconomic inequalities in dental caries among adults (35 years and older) in China and explore the contributions of various factors to these inequalities.

Methods: This study included 10,983 adults (3,674 aged 35-44 years, 3,769 aged 55-64 years and 3,540 aged 65-74 years) who participated in the 4th National Oral Health Survey (2015-2016) in China. Dental caries status was evaluated by the decayed, missing and filled teeth (DMFT) index.

Socioeconomic-related inequality in dental care utilization among preschool children in China.

Objectives: This study aimed to investigate socioeconomic-related inequality in dental care service utilization in the past 12 months among Chinese preschool children and to explore the contribution of various factors to this inequality.

Method: A total of 40 305 children aged 3-5 years from 372 kindergartens who participated in the Fourth National Oral Health Survey in China were included in the final analysis. The method of data weighting in complex sampling was adopted to make the samples more representative.

The prevalence and severity of periodontal disease in Mainland China: Data from the Fourth National Oral Health Survey (2015-2016).

Aim: To evaluate periodontal conditions in adults in mainland China based on data from the 4th National Oral Health Survey.

Materials And Methods: Data of adult subjects (35- to 44-year-old group [N = 4409], 55- to 64-year-old group [N = 4622], and 65- to 74-year-old group [N = 4428]) were analysed. Demographic, socio-economic, personal habit, dental history, and health attitude data were obtained using a questionnaire.

Measuring and decomposing socioeconomic-related inequality in the use of oral health services among Chinese adults.

Objectives: This study aimed to measure socioeconomic-related inequality and horizontal inequity in the use of oral health services and decompose this inequality among adults of different age groups in China.

Methods: In total, 10 973 adults (3669 aged 35-44 years, 3767 aged 55-64 years and 3537 aged 65-74 years) who participated in the 4th National Oral Health Survey (2015-2016) in China were included. Concentration curves and the Erreygers-corrected concentration index (EI) were employed to measure socioeconomic-related inequality in the use of oral health services.

Factors associated with oral health service utilization among adults and older adults in China, 2015-2016.

Objectives: To explore the factors associated with utilization of oral health services among Chinese adults and older adults according to the Andersen Behavior Model.

Methods: Data from the 4th National Oral Health Survey (2015-2016) in China were used. A total of 7206 people (3669 adults aged 35-44 years and 3537 older adults aged 65-74 years) were included in our analysis.

Short multi-armed polylysine-graft-polyamidoamine copolymer as efficient gene vectors.

Polyamidoamine-polylysine graft copolymers (PAMAM-g-PLL) were prepared by ring-opening polymerization of benzyloxycarbonyl lysine N-carboxyanhydride (Lys(Z)-NCA) initiated with primary amine of generation 4 polyamidoamine (PAMAM G4) and subsequent deprotection of polyamidoamine-poly-(benzyloxycarbonyl lysine) copolymer (PAMAM-PLL(Z)). The chemical structure and composition of the PAMAM-g-PLL with varying length of PLL arms were characterized by Fourier transform infrared spectroscopy (FT-IR) and nuclear magnetic resonance spectroscopy ((1)H NMR). Agarose gel electrophoresis test revealed that the PAMAM-g-PLL could completely combine DNA to form complexes.

[Effect of assemble flavone of Drynariae Rhizome on activity and calcium deposition of bone marrow stem cells of rabbit].

Objective: To observe the effect of assemble flavone of Drynariae Rhizome on the activity and osteogenic differentiation of bone marrow stem cells of rabbit in vitro.

Method: Density gradient centrifugation was used to isolate bone marrow stem cells from SD rats. The MSCs were also undergone osteogenic induction.

[Clinical application of ultrasonographic indexes for assessment of amniotic fluid volume].

Objective: To find the favorable interval of assessment of amniotic fluid volume and the optimal standard for oligohydramnios.

Methods: To determine actual amniotic fluid volume (AAFV) by collecting amniotic fluid during cesarean section and compare it with maximum vertical pocket (MVP) and amniotic fluid index (AFI) in different interval between cesarean section and measurement and test the sensitivity and specificity of MVP and AFI of different standard.

Results: The ultrasonographic results were divided into three groups according to the interval between measurement and delivery: within 24 hours group, 24-96 hours group and longer than 96 over hours group.

[Study on nuclear matrix protein in leukemia cells].

Objective: To compare the composition of nuclear matrix proteins (NMP) between leukemia cells and normal bone marrow cells.

Methods: NMP was isolated by high-salt extration and identified by SDS-PAGE and western blotting.

Results: Increase in NMP was demonstrated in acute and chronic myelogenous leukemic cells as well as in the blast phase of chronic leukemia.

[Experimental study on bone formation in a denser coral used for repairing cortical defects in dogs].

The present study was designed to investigate a coral skeleton, Favites, which was originated from the reef builders in Hainan island, as a bone substitute. The coral Favites, like porites, is composed of anagonite (CaCO3), but contains less volume of porosity, higher strength and denser construction than Porites. After implanted into cortical bone defects in mandibles and femurs of dogs, skeleton fragment of coral Favites demonstrated good biocompatibility and biodegradability.