Context:Mixed dentition arch analysis system is an important criterion in determining the type of orthodontic treatment plan. Different mixed dentition arch analysis system are available and among them both Moyer's and Tanaka-Jhonson method of space analysis was developed for North American children. Anthropological study reveals that tooth size varies among different ethnicities The present study was performed to determine the reliability of Moyer's and Tanaka-Jhonson's method of mixed dentition arch analysis system among Bengali population.Aims:To perform the comparative evaluation of the two mixed dentition space analysis system among Bengali population.Materials and Methods:Dental casts of maxillary and mandibular arches of 70 Bengali children with permanent dentitions were fabricated. The mesiodistal crown dimensions of all erupted permanent incisors, canines, and premolars were measured with digital callipers. For particular sum of mandibular incisors, Moyer's and Tanaka-Jhonson's mixed dentition arch analysis were calculated and further statistical analysis was carried on.Statistical analysis used:Descriptive statistics including the mean, standard deviation, and minimum and maximum values, unpaired‘t’ tests, correlation coefficient “r” were calculated and tabulated.Results:Tanaka and Johnston regression equations under-estimated the mesiodistal widths of permanent canines and premolars. On the other hand, there were no statistically significant differences between actual mesiodistal widths of canines and premolars and the predicted widths from Moyers charts at the 50% level for the lower and upper arches, among Bengali population.Conclusions:The study suggested that both Moyer's and Tanaka-Jhonson's mixed dentition arch analysis are applicable in Bengali population but with little modification in their regression equation.

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Context:Facial analysis is the first step in the evaluation of patients with orthodontic, cosmetic, or reconstructive procedures of the face, and one of the most important components of orthodontic diagnosis and treatment planning. It is a well-established fact that human faces differ from one another on the basis of race and ethnicity. The study will provide the aesthetic guidelines to assess the facial discrepancy in Bengali children to develop a proper treatment plan.Aims:To find out the mean values for selective linear measurements on the facial soft tissue of Bengali children, to demonstrate gender differences in the measurements.Materials and Methods:A cross-sectional study was done on 250 Bengali children of 6-14 years age, by measuring certain identified facial landmarks using a digital caliper.Statistical Analysis Used:Analytical statistical method with the help of student's t-test was used to determine mean values, standard deviation, and gender differences in the measurements using SPSS version 11.0.Results:In 6-8 years age group, male's average inter-endocanthion distance was significantly higher than that of females (P < 0.05), whereas in 12-14 years age group, the same parameter for females was significantly higher than that of males (P < 0.001). In 9-11 years age group, the average distance of exocanthion to exocanthion was higher for males compared to females, but the difference was not significant at 5% level (P > 0.05), though for 87% of cases, it was significant (P = 0.13). Total facial height for male subject was significantly high compared to that of females (P < 0.001) in 12-14 years age group.Conclusions:The study will provide the aesthetic guidelines to assess the facial discrepancy in Bengali children and provide a proper treatment plan through a simple and economically reasonable soft tissue analysis method.

The present study was carried out to find out the amount of cariogenic and cariostatic trace elements in mixed saliva. It was observed that Cu, Pb, Na showed significant variation in case of one surface as compared to caries free group. Between the non-caries and multiple caries group Cu, Pb, K showed no significant variation Zn showed highly significant variation.