Background: Socio-epidemiological data of dental caries helps to plan effective community interventions. Objective: To estimate the prevalence and assess the experience of dental caries among school going adolescents in a rural area of Bangladesh. Methods: A cross-sectional study was donein Sylhet District in Bangladesh, between January and December of 2014. Students of class VIII, IX and X, aged 12-16 years were taken for the study. A total of 90 studentswere divided into 12-14 years and 15-16 years age groups using simple (...) random sampling technique. A pre-designed, self-administered questionnaire was used for demographic survey. Students were examined for dental caries. Assessment of Experience of dental caries was done by Decayed, Missing and Filled teeth (DMFT) index. Results: The mean age of the respondents was 14.37±0.50 years. Females were 68(75.6%) and males were 22(24.4%). 31(34.4%), 30 (33.3%) and 29(32.2%) were from VIII, IX and X respectively. The older age group (15-16 years) had more decayed teeth than that of 12-14 years group (2.28 vs. 1.46; p=0.04). The mean DMFT score was lower in male compared to female (1.43 vs. 2.30; p>0.05).There was significant difference in the total DMFT score among the classes (p=0.009). Mean DMFT score was 1.88. Caries prevalence was 42.2% in the maxillary arch and 58.9% in the mandibular arch. Among males, the mandibular arch showed a higher caries level (63.64%) than the maxillary arch (40%), while in females, in maxillary and mandibular archeswere 42.64% and 42.65% respectively (p>0.05). Conclusion: 64.4% of the study population had dental caries with male predominance; mandibular arch was more involved. (shrink)

It is not likely that we will ever convincingly know how and why we came to be on this planet; of course, this has never prevented inquisitive minds from pushing the frontiers of understanding and discovery further. Our origin is the subject of scientific theories and continuous inquiries with no end in sight, as the shells of related complexities are getting much harder to crack. Paraphrasing philosopher and historian Will Durant, a very few people are getting to know more and (...) more about less and less. This knowledge and the scientific language used to express it are now becoming more and more incomprehensible to most humans; therefore, despite the sincere efforts of communication media’s countless “talking heads,” we may be inevitably driven by default to a new religion of worshiping the church of science, along with its scientist “priests,” and to a life filled with the unequivocal dangers that could befall us from such devotions. Humanity and the planet are faced with dangers that have and can be issued from the absence or deficiency of proper public knowledge and guiding ethical principles for handling many of the new scientific and engineering discoveries and innovations, such as artificial intelligence, nanotechnology, and plant, animal, and human gene editing, etc. To avoid inadvertent adverse impacts, which could seriously endanger our normal ways of life and even existence, knowledge has to be humanized and massively disseminated. Even at the expense of some mistakes, the benefits certainly outweigh the loss. -/- This book is a small effort along this path. -/- . (shrink)