Dental age estimation in Belgian children: Demirjian's technique revisited.

Aim: The purpose of this study was to evaluate the accuracy of Demirjian's dental age estimation in children in a Belgian Caucasian population and to adapt the scoring system in case of a significant overestimation as frequently reported. We selected 2523 orthopantomograms of 1265 boys and 1258 girls, of which 2116 (1029 boys and 1087 girls) were used for estimating the dental age with the Demirjian's technique. The 407 other orthopantomograms were beyond the original age limit. A second sample of 355 orthopantomograms was used to evaluate the accuracy of the original method and the adapted method. A signed-rank test was performed to search for significant age differences between the obtained dental age and the chronological age. A weighted ANOVA was performed in order to adapt the scoring system for this Belgian population. The overestimation of the chronological age was confirmed. The adapted scoring system resulted in new age scores expressed in years and in a higher accuracy compared to the original method in Belgian Caucasians.     

Estimating Age of Majority on Third Molars Developmental Stages in Young Adults from Thailand Using a Modified Scoring Technique*

Abstract: The aim of this study was to achieve a referral database for dental age estimation of unaccompanied minors of Thai nationality. A total of 1199 orthopantomograms were collected from original Thai women and men equally divided in age categories between 15 and 24 years. On the radiographs, the developmental stage of the third molars was scored applying a modified scoring technique. Inter- and intra-observer reliabilities were tested using kappa statistics. Correlation between the scores of all four wisdom teeth and left–right symmetry were evaluated with Pearson’s correlation coefficient. Student’s t-test on asymmetry was performed and regression formulas were calculated. The present database was the first to assemble third molar developmental scores on radiographs of Thai individuals and provides more appropriate dental age estimation of unaccompanied Thai minors. Future research on similar databases of different nationalities worldwide may expose ethnical influences on dental development.     

Non-destructive dental-age calculation methods in adults: intra- and inter-observer effects

The aim of the present study was to obtain data on the reliability and reproducibility of two non-destructive dental-age estimation methods in adults by calculating inter- and intra-observer effects. Both a morphological and a radiological technique available in the scientific literature were evaluated on a number of recently extracted teeth: the morphological technique was evaluated on a total of 160 teeth by two examiners, while three examiners applied the radiological technique on apical radiographs of 72 extracted teeth. Paired t-tests were used to calculate intra- and inter-observer differences. For the morphological method, both examiners were able to produce dental-age estimations that did not differ significantly from the real age of the teeth, obtaining a mean error between 0.5 and 1.8 years and a standard deviation of this error between 9.0 and 11.3 years. When using the radiological technique according to the original protocol, all three examiners produced age estimations that were statistically comparable to the real age of the teeth with a mean error of 0.5-2.5 years and a standard deviation of 4.6-9.8 years. For both techniques, intra-observer differences were observed. Based on the results of this study, it can be concluded that both non-destructive dental-age estimation techniques were able to produce reasonably accurate dental-age estimations, at least when these techniques were applied appropriately. However, the forensic odontologist is recommended to use different age estimation techniques and perform repetitive measurements in order to verify the reproducibility of the calculations performed.     

Age calculation using X-ray microfocus computed tomographical scanning of teeth: a pilot study

To correlate dental age with an individual's chronological age based on the calculated volume ratio of pulp versus tooth volume measured, an X-ray microfocus computed tomography unit (microCT) with 25 microm spatial resolution was used to non-destructively scan 43 extracted single root teeth of 25 individuals with well-known chronological age. Custom-made analysis software was used by two examiners to obtain numerical values for pulpal and tooth volume. The ratio of both was calculated and statistically processed. No significant intra- or inter-examiner differences were found. In fact, a very strong concordance correlation coefficient was found. Linear regression analysis showed a coefficient of determination (r) of 0.31 which suggests that there is a rather weak correlation between the volume ratio of pulp versus tooth and biological age. Although rather time consuming, this technique shows promising results for dental age estimation in a non-destructive manner using X-ray microfocus computed tomography.     

Tendenzen der Gegenwartskultur: Zwischen Normalismus und Vergewöhnlichung

Der Aufsatz thematisiert in konzeptueller und empirischer Hinsicht Aspekte von Normalität. Zum einen werden verschiedene Ansätze behandelt, die Normalität als eine Ebene und als ein Resultat praktischer Wirklichkeitskonstruktion entwerfen. Als besonders anschlussfähig und weiterführend erweisen sich Konzepte und Argumente der Differenzierungstheorie, der Diskurstheorie, der Zivilisationstheorie, der Habitustheorie, der Rahmentheorie und der Stigmatheorie. Zum anderen ist es das Ziel, gegenläufige Entwicklungstendenzen in der Normalitätskonstruktion der Gegenwartskultur zu identifizieren und aufzuklären. Diese Tendenzen werden unter den Titeln ?Normalismus“ (J. Link) und ?Vergewöhnlichung“ (J. Weiß) diskutiert.     

Development,patterns and causes of violence against foreigners in Germany: Social and biographical characteristics of perpetrators and the process of escalation

Acts of violence against foreigners have increased dramatically since 1991 in Germany. The author underlines the wave‐like process of escalation and tries to identify triggering and amplifying factors (police reaction, political deficits, public opinion). He analyses police data concerning biographical and socio‐demographic characteristics of the perpetrators and discusses some of the prominent scientific interpretations (disintegration, individualisation, right‐wing activities) concerning the recent waves of right‐wing and xenophobic violence in Germany.     

Third Molar Development: Evaluation of Nine Tooth Development Registration Techniques for Age Estimations

Multiple third molar development registration techniques exist. Therefore the aim of this study was to detect which third molar development registration technique was most promising to use as a tool for subadult age estimation. On a collection of 1199 panoramic radiographs the development of all present third molars was registered following nine different registration techniques [Gleiser, Hunt (GH); Haavikko (HV); Demirjian (DM); Raungpaka (RA); Gustafson, Koch (GK); Harris, Nortje (HN); Kullman (KU); Moorrees (MO); Cameriere (CA)]. Regression models with age as response and the third molar registration as predictor were developed for each registration technique separately. The MO technique disclosed highest R² (F 51%, M 45%) and lowest root mean squared error (F 3.42 years; M 3.67 years) values, but differences with other techniques were small in magnitude. The amount of stages utilized in the explored staging techniques slightly influenced the age predictions.     

Dental age estimation through volume matching of teeth imaged by cone-beam CT

A custom-made voxel counting software for calculating the ratio between pulp canal versus tooth volume based on cone-beam CT tooth images was developed and evaluated. The aim of this study was to attempt establishing a correlation between the chronological age of a certain individual and the pulp/tooth volume ratio of one of the teeth. Twenty-eight single rooted teeth of 19 individuals with well-known chronological age were scanned by the cone-beam CT (3D Accuitomo, J. Morita, Kyoto, Japan). Next the images were analyzed using the custom-made software. Linear regression analysis was performed. The results of the analysis showed a moderate correlation between the pulp/tooth volume ratio and biological age with a coefficient of determination (R2) of 0.29. Although the present work was limited to a pilot study, the developed technique showed promising results for dental age estimation in a non-invasive manner using cone-beam CT images in living individuals.     

Extradition on the Two Sides of the Atlantic: The U.S. Model as Blueprint for the European Arrest Warrant?

This article compares the EU’s enhanced extradition model, in the form of the European Arrest Warrant, with the more mature American interstate extradition mechanism. The US Constitution’s Extradition Clause mandates interstate extradition and, after a slow start-up, has led to a smooth and obligatory procedure. In the EU, the European Arrest Warrant, based on the principle of mutual recognition, has made a number of significant changes to traditional extradition and has simplified extradition between EU member states. Yet, it does not operate without problems and the first decade has revealed what the difficulties with extradition on the basis of mutual recognition are. The comparison with the US seeks to draw lessons from the US experience. The main finding is that in a number of areas the US example can direct the EU toward further improving its extradition scheme, while at the same time it is not realistic to expect that the EU will achieve a similar degree of harmony as in the US, required for an obligatory extradition scheme. The article argues that it is important to recognise these limits in order to make the European Arrest Warrant a success.     

Balancing constituency and congruence: How constituency involvement affects positional congruence between organized interests and the general public

This article asks to what extent and under which conditions interest groups are congruent with public opinion. We argue that interest groups can be caught in a balancing act between engaging with their constituency on the one hand and aligning their position with the broader public on the other hand. We contribute to previous studies by arguing that the effect of interest group type on congruence is moderated by the degree to which constituencies are involved in advocacy processes and the salience of policy issues. We test these expectations by analyzing 314 media claims made by Belgian interest groups regarding 58 policy issues. The results demonstrate that citizen groups with formal members are more prone to share the position of the broader public compared to concentrated interest groups such as business associations, especially if they involve their members in advocacy activities and when issues are salient in the media.