Prevailing Status and Treatment Seeking Awareness Among Patients Attending in The Orthodontics Department of Bangabandhu Sheikh Mujib Medical University

Background: Malocclusion is problem since antiquity. But people’s perception about the problem varies with their geographical location and cultural background. The problem seems to be more acute in developing countries like Bangladesh. Objectives: The present study was undertaken to assess the awareness about aesthetic problem of malocclusion and treatment seeking behavior among the patients attending in orthodontic department of BSMMU. Methods: The present cross-sectional study was carried out in the Department of Orthodontic, Faculty of Dentistry, BSMMU, over a period 24 months from January 2008 to December 2009. A total of 110 participants who were suffering from malocclusion and came for dental treatment were the study population. Results: The mean age of the patients was 21 years and the youngest and the oldest patients were 8 and 32 years old respectively with female to male ratio being roughly 3:2. Graduate or postgraduate level educated patients were predominant (53.6%). Over 70% of the respondents viewed malocclusion as an aesthetic problem, 50% as functional problem, 55.5% social problem and 69.1% oral problem. Two-third (67%) told that malocclusion was a treatable condition. Approximately 43% of the patients identified trauma as a cause of malocclusion, 40% gingivitis or periodontitis and 35.5% dental caries. About one-third (32.7%) of the respondents was of the opinion that certain habits should be avoided to prevent malocclusion, 15.5% told timely treatment of malocclusion, 30% told prevention of early loss of teeth due to caries, 12.7% were in favour of the use of a space maintainer in places of premature loss of a deciduous tooth. Over 90% of the respondents held the view that symptoms of malocclusion, its prevention and different treatment options should get the priority in educating the society about malocclusion. However, 80% of the respondents told that causative factors should discussed. Regarding ways of behaviour change communication (BCC), TV got the first priority (94%) followed by newspaper (92%), teacher (88%), school health programme (84.5%), friends (76%), health educators (43.6%) and poster got the least priority (30.9%). Conclusion: The study concludes that a substantial proportion of the patients of malocclusion are not aware of the causes and consequence of malocclusion. However, the patients are aware that malocclusion is an aesthetic problem and can be corrected. Key words: Malocclusion; aesthetic problem; treatment seeking behavior. DOI: http://dx.doi.org/10.3329/bsmmuj.v4i2.8637 BSMMU J 2011; 4(2):94-9

Concentrational study of nutrients related to chelators assisted sunflower (Helianthus annuus L.) from artificially cadmium-contaminated soil

The present study investigates the appliance of cadmium (Cd) noxiousness and damage to nutrient concentration in sunflower hybrids, FH-533 and Hysun-33, as well as the role of natural and synthetic chelator’s oxalic acid (OA) and ethylene triamine tetraacetic acid (EDTA) respectively in reducing the Cd toxicity in sunflower plant. Sunflower, known as heavy metal phytoextractor, was grown in soil artificially contaminated with soluble salt CdCl2 at 250 ppm and 450 ppm. Pot experiment was conducted in a complete randomized design with three replicates for cadmium metal, chelating agents and sunflower hybrids at seedling, vegetative and reproductive stages. Application of Cd of 250 ppm and 450 ppm imposed the negative effect on shoot and root dry biomass by directly or indirectly disturbing the nutrient uptake. Maximum growth and nutrient uptake were observed when chelators (EDTA and OA) were applied alone respectively. In Cd contaminated soil the application of EDTA proved helpful in ameliorating the toxic effect of Cd250 on nutrient content of both sunflower hybrids as compared to Cd450, the Hysun-33 showed better results in terms of K, Ca, Fe, Zn, P, N as compared to FH-533, so it can be cultivated on Cd adulterated soil for better yield. The presented results offer a novel solution for optimization of sunflower cultivation on soil affected by Cd, as well as for increased health-promoting nutrients of sunflower

Mesiodistal Crown Dimensions of Permanent Teeth in Bangladeshi Population

Background: Variation in tooth size is influenced by genetic and environmental factors. Several studies have reported tooth size variation between and within different racial groups. In order to improve the quality of dental care available, there is a great need for data on the mesiodistal crown dimensions of the individual teeth of Bangladeshi population. Objectives: To find nominative data on the mesiodistal crown dimensions of permanent teeth in Bangladeshi population and to compare the findings with those reported in other populations. Methods: This observational study was done from January, 2008 to June, 2010 in the Department of Orthodontics, Faculty of Dentistry, Bangabandhu Sheikh Mujib Medical University. A total of 244 Bangladeshi subjects (77 males and 167 females), aged 7 – 36 years (mean 18.3 years) with no age limit who attended at the above mentioned place for treatment were included in the study. Main outcome measure was mesiodistal crown dimension of each tooth class of permanent dentition. Mesiodistal crown dimensions were measured from dental casts of the permanent teeth. Results: Males had significantly larger teeth than females for maxillary central incisors (p < 0.05) and for the mandibular second premolars (p < 0.001). In both sexes, the maxillary lateral incisors showed the greatest variability [coefficient of variation (CV) 10.7%] and the maxillary canines the least (CV 6.9%) in mesiodistal crown dimension. Mandibular canines displayed greater sexual dimorphism in mesiodistal crown size than in any other tooth classes. Comparisons of the mesiodistal crown dimensions between population groups showed that Bangladeshis have tooth sizes close to those of North Indians, Icelanders and Jordanians but larger than those of North American Whites. Conclusions: From this study, a standard for the mesiodistal crown dimensions of permanent dentition of Bangladeshi males and females are obtained. Key Words: Crown dimension; Mesio-Distal width; Permanent dentition. DOI: http://dx.doi.org/10.3329/bsmmuj.v4i2.8635 BSMMU J 2011; 4(2):81-8

A cross sectional study to assess the prevalence of malocclusion in 08-12 years old school age children of the selected urban & rural community of Bangladesh

Objective: To determine the prevalence of malocclusion in school-age children from a selective area of the urban and rural community of Bangladesh. Methods: A cross-sectional descriptive survey was conducted among 748 children aged 08-12 years old were examined from October 2019 to September 2020 in Sylhet Sardar Upazila, Bangladesh. Angle”s classification was used for recording molar relationship with malocclusion traits. The study participants were examined by disposable dental tools (calibrated probs and mirror) including torchlight. After the collection of all data, it was compiled and analyzed by Statistical Package for the Social Sciences (SPSS) Windows version 23. Chi-square test was used for categorical variables. P values <0.05 were considered as statistically significant. Result: The prevalence of malocclusion in urban school-age children was 237(63.4%) and in rural 213(57.0%).In urban area, the prevalence of malocclusion was 109(58.3%) in boys and 128(68.4%) in girls group. The majority (70.5%) were found Angle’s class I in urban group and 148(69.5%) in rural. One forty three (60.3%) patients were found increased overbite with malocclusion in urban group and 124(58.2%) in rural. Angle’s class-I malocclusion and Increased overbite were the most commonly occurring malocclusion. Conclusion: Prevalence of malocclusion was more in urban school age children when compared with rural. Malocclusion was significantly more in girls than boys in both urban and rural area. Angle’s class-I malocclusion and Increased overbite were the most commonly occurring malocclusion of school age children from a selected urban and rural community of Bangladesh

Effect of Climate Change on Polyphenols Accumulation in Grapevine

Phenolics compounds in grapes contribute to berry and must color, organoleptic properties, nutritional value, antioxidant properties and provide protection against environmental challenges. Climate change has place mammoth challenges for the viticulture industry in different viticulture regions. Environmental variables determine to the greater extent, suitable grapes varieties for fresh as well as premium quality wine production. Grape berry composition is particularly affected by heat, drought, and intensity of solar irradiation. It is expected that climatic extremes will have an adverse effect on berry quality traits such as phenolic compounds in different grape cultivars. Polyphenols particularly anthocyanins decrease at elevated temperature, similarly flavanols levels increase with better exposure to solar radiation. Water availability is crucial for better vine growth and good production, however modest water stress particularly near veraison, upregulates the activity of key enzymes of the phenylpropanoid and flavonoid pathways. Therefore, it is important to know that how and when phenolic substance accumulate in berries and how various cultivars respond. This review elaborates the effect of weather conditions on biosynthesis of different phenolic compounds in grapes. Berry phenolic substances e.g., total phenolic compounds (TPC), total anthocyanins (TAC) and total flavonoid contents (TFC) synthesis is strongly regulated under the influence of environmental conditions during growing season. In this chapter we, shall focus on accumulation of phenolic compounds in grapevine in relation to climatic variations

Degradation effect of Auger recombination and built-in polarization field on GaN-based light-emitting diodes

In this work, theoretical investigation of the influence of Auger recombination coefficient and built-in polarization field on the internal quantum efficiency (IQE) in terms of lateral-vertical single quantum well (SQW) as well as multiquantum well (MQW) GaN-based blue light-emitting diodes are presented. The degradation effect of the built-in polarization field on the IQE of vertical light-emitting diodes is used to strengthening the Auger recombination coefficient in comparison to lateral light-emitting diodes. This result has been found consistent in both single-as well as multi-quantum well structures. In addition, when Auger recombination coefficient has been included in the analysis, vertical multiquantum well structure shows more degradation in the IQE in comparison to the lateral structures. The effect has been dominant in vertical MQW case