Objective: This study seeks to review current and relevant literature on global Angle class III malocclusion prevalence. Materials and Methods: The electronic databases PubMed, ISI Web of Knowledge, and the Cochrane Database of Systematic Review were searched using specific inclusion criteria to obtain applicable articles. All pertinent references were also examined for acceptability. Results: A total of 20 articles were identified using the inclusion criteria. The prevalence of Angle class III malocclusion ranged from 0% to 26.7% in different populations reported in the literature examined. Meta-regression analysis showed no statistically significant association between prevalence rates and the method of assessment, age group and year of the study. However, much of the study-to-study variation (approximately 40%) could be explained by population. Conclusion: These results suggest that the prevalence of Angle class III malocclusion varies greatly within different races and geographic regions. Chinese and Malaysian populations have a higher prevalence of Angle class III malocclusion compared to other racial groups, while Indian populations have a lower prevalence than all other racial groups examined.

The purpose of this study was to evaluate the ability of students in a U.S. dental school to learn and apply two indices of orthodontic need: the Index of Orthodontic Treatment Need (IOTN) and the Index of Complexity, Outcome, and Need (ICON). Dental students were randomly selected and separated into three groups: control, IOTN, and ICON. Each evaluated thirty casts that had previously been evaluated by a panel of thirteen orthodontists to develop a gold standard of orthodontic treatment need for these casts. Students re-evaluated the same thirty casts after IOTN and ICON training for their own group, while the control group did not receive any training. Logistic regression of pre-and post-training agreement with the gold standard was calculated for each group to create a clear quadratic relationship. Signiicant differences were not found between pre-and post-training evaluation for either the IOTN or the ICON groups as compared to the control. However, the IOTN group did show more improvement when compared with the ICON group. This study demonstrates that the use of the IOTN index improved assessment in predoctoral dental students to determine orthodontic treatment need.Dr. Cubas is a

The Latino population is the fastest growing and the largest minority group in the United States comprising 16% of the population younger than 18 years of age. Yet, little is known about the effect of acculturation in oral health related quality of life in Latino children and their parents. Objective: The objective of this study was to assess the effect of acculturation in parent and child's perceptions of the child's oral health status and oral health related quality of life (OHRQoL) as well as the effect in the concordance between children and parents/caregivers. Method: Sixty-three Latino children between the ages of 8 and 15, and their parents were recruited from the waiting room at the University of California, San Francisco Orthodontic and Pediatric Clinics. Parent and children each separately completed the Child Oral Health Impact Profile questionnaire (COHIP) for children and COHIP for parent/caregiver. Results: Of the sixty-three children, fifteen children (23.8%) had a more negative perception of their oral health than their parents whereas twenty-three children (36.5%) had a more positive perception. In terms of agreement between children and parents, questions about oral health showed the lowest level of agreement (34.9%) and self-image questions the highest (55.6%). Conclusion: The study findings indicate that the more acculturated the child, the more negative their perception of their oral health. The level of disagreement between parent and child, underscores the importance of obtaining both the child and parent OHRQoL perceptions.

Background: Mineral trioxide aggregate (MTA), is commonly used in endodon9c and re--stora&ve procedures. Objec&ve: Our objec&ve was to introduce gas adsorp&on porosimetry as a viable method for evalua1on of general porosity and specific pore characteris1cs of set Portland cement used in subs1tute for MTA, to inves1gate the effect of two different obtu--ra#on methods (compac#on and compac#on in conjunc#on with indirect ultrasonic agita--!on of the cement paste), and to evaluate the correla.on between the specific pore char--acteris(cs to compressive strength in general. Material and Methods: Portland cement samples were prepared and divided into two groups based on compac4on techniques. An ini#al stereomicroscopic evalua*on was done to assess any differences in appearance of pores randomly selected from either of the two experimental groups. Specific pore charac--teris&cs and compressive strength werequan&fied by a gas adsorp&on porosimeter and an Instron universal tes(ng machine. A two--tailed student t--test was used for sta,s,cal com--parison of data, and a regression analysis was done to evaluate the correla6on between each specific pore characteris-c and compressive strength in general. Results: The gas po--rosimetry method provided measurable values rela2ng to specific pore characteris2cs of Portland cement. The stereomicroscopy evalua6on revealed marked differences between samples from the two groups, namely visibly larger pores both on the outside surface and in cross--sec$ons of specimens prepared by the indirect ultrasonic ac$va$on method. Con--clusions: Gas adsorp*on porosimetry is a feasible method for evalua*on of specific pore characteris)cs of Portland cement and poten)ally other dental materials as well.