Effects of temperature and precipitation on the temporal patterns of dispersing tobacco thrips, Frankliniella fusca, and onion thrips, Thrips tabaci, caught on yellow sticky traps were estimated in central and eastern North Carolina and eastern Virginia from 1997 through 2001. The impact that these environmental factors had on numbers of F. fusca and T. tabaci caught on sticky traps during Apri...

In the present study, the exact mathematical definitions of concepts of a “center of resistance” and a ”center of rotation of a tooth” are introduced. These concepts are widely used in the literature on orthodontic biomechanics, however they are nonstrictly defined. A center of resistance and a center of rotation are shown to exist only in particular cases. The conditions of their existence and...

INTRODUCTION Tooth agenesis is a phenomenon that occurs relatively commonly. The incidence of the missing teeth presented in the previous reports varies according to the studied population. OBJECTIVE The aim of this study was to find the prevalence of tooth agenesis in a population group in Bucharest. METHODS AND RESULTS The prevalence and distribution of dental agenesis was determined in a...

In this report, the case of a patient who has been treated with a different use of a tooth-borne custom-made mandibular symphyseal distraction device is presented. The difference in the application is that the distal arm of the device was sectioned during the retention phase to allow the possible relapse of displaced condyles to their original positions while the labial segment expansion is bei...

One of the most important indicators of dental caries prevalence is the total count of decayed, missing or filled surfaces in a tooth. These count data are often clustered in nature (several count responses clustered within a subject), over-dispersed as well as spatially referenced (a diseased tooth might be positively influencing the decay process of a set of neighbouring teeth). In this artic...

OBJECTIVE The aim of the study was to analyze the prevalence and distribution of ectopic eruption of the permanent maxillary first molar (EEM) in individuals scheduled for orthodontic treatment and to investigate the association of EEM with dental characteristics, maxillary skeletal features, crowding, and other dental anomalies. METHODS A total of 1,317 individuals were included and randomly...

Primary failure of eruption represents a cessation of tooth eruption before emergence not due to a physical barrier or abnormal position and has no systemic cause. This failure of tooth eruption is rare phenomenon and it has not been associated with alterations of dental follicle. This case report describes a permanent right first molar with primary failure of eruption at the inferior border of...

The chronology of human development involves complex systems of sequence or order that can scarcely be hinted at in the standard texts. Anatomy students learn one order of ossification for the carpal bones, beginning with the capitate and hamate, and proceeding through the triquetral, lunate, and the multangulars. Dental students learn the median order of tooth eruption as first molar (Ml), cen...

The aim of this work was to create digitally phase-shift images avoiding the mechanical adjustments of the PZT, testing them with the digital shearography method. It was tested using a well-known object, a cantilever beam of aluminium under deformation, and a tooth. The results presented the ability to create the deformation map and curves with reliability and sensitivity, reducing the cost, an...