Investigation on the Awareness and Behavior of Primary School Students on Sunscreen Use in Beijing.

Objective: This study aims to understand primary school students' behavior and awareness of sun exposure and sunscreen in Beijing, China. Methods: A questionnaire survey was conducted of 232 students in grades 4-6 at a public primary school in Beijing, including 129 boys (55.6%) and 103 girls (44.4%). The contents of the questionnaire included awareness about ultraviolet rays, sun exposure, sunscreen habits, and the understanding and use of sunscreen. Results: The majority of the subjects (75.0%) said they had never been sunburned, and 26.3% had never been tanned. Only 7.3% of the primary school students had a comprehensive and correct understanding that sunlight will burn, cause cancer, tan, and age the skin. Sunscreen (47.8%), sunshades (47.4%), sun hats (44.4%), avoiding going out at noon (37.5%), and sunglasses (30.2%) were the most frequently used sunscreen means. Furthermore, 47.8% of primary school students used topical sunscreen for light protection, higher than other measures. The proportion of girls using sunscreen at least once a day was more than boys. Conclusion: Primary school students in Beijing, China, do not have a comprehensive understanding of ultraviolet rays, and there are deficiencies in protective behavior. Their awareness and use of sunscreen need to be improved.

Topical grape seed proanthocyandin extract reduces sunburn cells and mutant p53 positive epidermal cell formation, and prevents depletion of Langerhans cells in an acute sunburn model.

OBJECTIVE: The purpose of this study was to investigate whether grape seed proanthocyanidin extract (GSPE) can provide photoprotection against ultraviolet (UV) irradiation. BACKGROUND DATA: Study has shown that GSPE is a natural oxidant, and is used in many fields such as ischemia-reperfusion injury, chronic pancreatitis, and even cancer. However, the effect of GSPE on UV irradiation is as yet unknown. METHODS: Cutaneous areas on the backs of normal volunteers were untreated or treated with GSPE solutions or vehicles 30 min before exposure to two minimal erythema doses (MED) of solar simulated radiation. Cutaneous areas at different sites were examined histologically for the number of sunburn cells, or immunohistochemically for Langerhans cells and mutant p53 epidermal cells. RESULTS: On histological and immunohistochemical examination, skin treated with GSPE before UV radiation showed fewer sunburn cells and mutant p53-positive epidermal cells and more Langerhans cells compared with skin treated with 2-MED UV radiation only (p<0.001, p<0.001, and p<0.01, respectively). CONCLUSIONS: GSPE may be a possible preventive agent for photoprotection.

[A comparison of early and late reconstruction and repositioning of orbital blow-out fracture].

OBJECTIVE: To study and compare the operative results of the early and late treatment of orbital blow-out fracture. METHODS: Orbital blow-out fractures were reconstructed and repositioned. Three dimensional measurements, CT scanning, diplopia analysis, Medpor filling of the orbit were used for the operation and the study. The operative results were compared between 15 cases of early and 16 cases of late reconstruction of blow-out fracture. RESULTS: In the early treatment group, there were 8 cases of diplopia, 15 cases of orbital invagination and 10 cases of disesthesia of the infraorbital nerve. After surgery, diplopia was corrected in 7 cases; invagination was corrected in all the 15 cases; disesthesia of the infraorbital nerve was corrected in 8 cases. In the late treatment group, there were 10 cases of diplopia, 16 cases of orbital invagination and 9 cases of disesthesia of the infraorbital nerve. After surgery, diplopia was corrected in 3 cases, unimproved in 4 cases, aggravated in 2 cases. 5 of them received reoperation of extraocular muscle for diplopia. Orbital invagination was uncorrected in 3 cases. 2 of them were re-operated on. Disesthesia of the infraorbital nerve was unimproved in 2 cases. By comparing the operation results, of the two groups using FISHER accuracy inspection, the significant difference was only in the correction of the double visions (chi 2 = 4.865, P < 0.05). CONCLUSION: Early operation for orbital blow-out fracture is easier, with better results, fewer complications and reoperations than the late operation.