scholarly journals Predicting the Mesiodistal Crown Dimensions of the Permanent First Molars from the Deciduous Second Molars

2021 ◽  
Vol 2021 ◽  
pp. 1-5
Author(s):  
Dunia Ahmed Al-Dulaimy ◽  
Mohammed Nahidh ◽  
Mohammed Rafid A. Al-Khannaq
Keyword(s):  
Gender Differences ◽  
High Precision ◽  
New Method ◽  
Mixed Dentition ◽  
Regression Equations ◽  
And Gender ◽  
Crown Dimensions

Background. This study aims to formulate regression equations that predict the mesiodistal crown widths of the permanent first molars utilizing the mesiodistal crown widths of the deciduous second molars. Methods. Fifty pairs of study models belonging to 50 Iraqi children aged eight to nine years with sound mixed dentition were used to measure the mesiodistal crown widths of the permanent first molars and deciduous second molars using a pointed digital sliding caliper with 0.01 mm sensitivity. Side and gender differences were assessed, and the correlations between these teeth were obtained to develop the regression equations. Results. The results revealed no significant side differences, so the samples were merged and analyzed for gender differences, which were found to be significant in all examined teeth except the mandibular permanent first molar. Direct, moderate, and highly significant correlations between the mesiodistal crown widths of the permanent first molars and deciduous second molars were found, which led to the development of regression equations. After applying these equations, the resultant predicted widths were compared to the actual widths, and the results revealed nonsignificant method differences. Conclusions. A new method was developed to predict the widths of permanent first molars from the adjacent primary second molars with high precision.

scholarly journals Estimation of stature from percutaneous length of tibia amongst Bengalee population-an observational study in a teaching institution in West Bengal, India

2019 ◽  
Vol 7 (5) ◽  
pp. 1653
Author(s):  
Tapas Ghosh
Keyword(s):  
Gender Differences ◽  
Observational Study ◽  
West Bengal ◽  
Accurate Estimation ◽  
Long Bones ◽  
Regression Equations ◽  
Body Parts ◽  
Teaching Institution ◽  
And Gender

Background: Assessment of stature from measurement of percutaneous body parts is important for identification. This assessment can be done from long bones, especially tibia and femur. Tibia is ideal in this context as it is subcutaneous, and measurement is easy. Various regression equations correlating stature with percutaneous length of tibia (PCLT) are outdated, incorrect or inappropriate. So, the present study aimed at finding a recent relationship, and if possible, correlation between PCLT and stature.Methods: PCLT and stature of 470 subjects of Burdwan district, West Bengal, India, were recorded.Results: New regression equations were derived from the data, taking into consideration the racial, geographic, secular and gender differences. After determining that PCLT and stature were related and positively correlated, the newly formulated regression equations were evaluated and found to be statistically significant.Conclusions: The new regression equations derived from this study could be employed for more accurate estimation of stature.

scholarly journals New Regression Equations for Mixed Dentition Space Analysis in an Iranian Population

2013 ◽  
Vol 14 (6) ◽  
pp. 1156-1160 ◽  
Author(s):  
Mohammad Hossein Toodehzaeim ◽  
Hossein Aghili ◽  
Elham Shariatifar ◽  
Mahboobe Dehghani
Keyword(s):  
Linear Regression ◽  
Correlation Coefficients ◽  
Iranian Population ◽  
New Method ◽  
Mixed Dentition ◽  
Regression Equations ◽  
Space Analysis ◽  
Novel Approach ◽  
Mixed Dentition Analysis ◽  
Mandibular Incisors

Abstract Aims Prediction of the mesiodistal crown width of unerupted canines and premolars is an important aspect of mixed dentition analysis. The accuracy of Tanaka-Johnston equations, the most commonly method, is questionable when it is applied to different ethnic groups. In this study, we aimed to develop a new regression equation for this prediction in an Iranian population. Materials and methods The dental casts of 120 Iranian subjects with complete permanent dentition were selected. Mesiodistal crown widths of teeth were measured with digital caliper. In the first part of the study, the correlation and linear regression equations between four mandibular incisors and the canine-premolars segments of both arches were developed (modified Tanaka-Johnston equation). In the second part, as a new method, correlation and linear regression equations were developed between the sum of mandibular central incisorsmaxillary first molars and the canine-premolars segments. Results It was found that the correlation coefficients between the sum of mandibular central incisors-maxillary first molars and the maxillary and mandibular canine-premolars segments were higher (r = 0.66, 0.68 respectively) than the one between the four mandibular incisors and the canine-premolars segments (r = 0.58. 0.64). Conclusion New linear regression equations were derived. In this study, the sum of mandibular central incisors and maxillary first molars was better predictor for unerupted canines and premolars. This novel approach allows the prediction of width of unerupted canines and premolars to take place at earlier age. Clinical significance Using the new method, orthodontists could take advantage of mixed dentition analysis at earlier age. Moreover, to test the derived equations on a larger sample size and in other ethnicities is highly recommended. How to cite this article Toodehzaeim MH, Aghili H, Shariatifar E, Dehghani M. New Regression Equations for Mixed Dentition Space Analysis in an Iranian Population. J Contemp Dent Pract 2013;14(6):1156-1160.

Brief Report. The PCL-R and Gender

2000 ◽  
Vol 16 (3) ◽  
pp. 147-149 ◽  
Author(s):  
Martin Grann
Keyword(s):  
Gender Differences ◽  
Sexual Behavior ◽  
Discriminant Analysis ◽  
Juvenile Delinquency ◽  
Violent Offenders ◽  
Matched Pairs ◽  
Psychopathy Checklist ◽  
Psychopathy Checklist Revised ◽  
And Gender

Summary: Hare's Psychopathy Checklist - Revised (PCL-R; Hare, 1991 ) was originally constructed for use among males in correctional and forensic settings. In this study, the PCL-R protocols of 36 matched pairs of female and male violent offenders were examined with respect to gender differences. The results indicated a few significant differences. By means of discriminant analysis, male Ss were distinguished from their female counterparts through their relatively higher scores on “callous/lack of empathy” (item 8) and “juvenile delinquency” (item 18), whereas the female Ss scored relatively higher on “promiscuous sexual behavior” (item 11). Some sources of bias and possible implications are discussed.

Personal Problem Solving of Partners in Divorce Proceedings

2015 ◽  
Vol 36 (1) ◽  
pp. 82-103 ◽  
Author(s):  
Tereza Soukupova ◽  
Petr Goldmann
Keyword(s):  
Gender Differences ◽  
Problem Solving ◽  
Thematic Apperception Test ◽  
Scoring Systems ◽  
Personal Control ◽  
Personality Characteristics ◽  
Personal Problem ◽  
Thematic Apperception ◽  
And Gender ◽  
The Given

Abstract. The Thematic Apperception Test is one of the most frequently administered apperceptive techniques. Formal scoring systems are helpful in evaluating story responses. TAT stories, made by 20 males and 20 females in the situation of legal divorce proceedings, were coded for detection and comparison of their personal problem solving ability. The evaluating instrument utilized was the Personal Problem Solving System-Revised (PPSS-R) as developed by G. F. Ronan. The results indicate that in relation to card 1, men more often than women saw the cause of the problem as removable. With card 6GF, women were more motivated to resolve the given problem than were men, women had a higher personal control and their stories contained more optimism compared to men’s stories. In relation to card 6BM women, more often than men, used emotions generated from the problem to orient themselves within the problem. With card 13MF, the men’s level of stress was less compared to that of the women, and men were more able to plan within the context of problem-solving. Significant differences in the examined groups were found in those cards which depicted significant gender and parental potentials. The TAT can be used to help identify personality characteristics and gender differences.

Sex and Gender Differences

2012 ◽  
Vol 220 (2) ◽  
pp. 57-60 ◽  
Author(s):  
Markus Hausmann ◽  
Barbara Schober
Keyword(s):  
Gender Differences ◽  
Sex And Gender ◽  
And Gender ◽  
Sex And Gender Differences

False Consensus and Gender Differences in the Clinton-Lewinsky Sex Scandal

1999 ◽  
Author(s):  
Clifford E. Brown ◽  
Nancy A. Perhot ◽  
Julia L. Schmidt
Keyword(s):  
Gender Differences ◽  
False Consensus ◽  
And Gender
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