The validity of self-reported dental agenesis.

The optimal tools for obtaining a diagnosis of dental agenesis (DA) among adults are childhood dental records and radiographs. However, these are often not available, and therefore the present study aimed to assess whether DA in adults could be validly assessed by self-reported information guided by a questionnaire. A questionnaire eliciting information on DA of permanent teeth was constructed, pilot-tested, and subsequently posted to a case group consisting of 334 young adults, for whom the DA status had been ascertained in the period from 1992 to 2002.

Agenesis of permanent teeth in 8138 Danish schoolchildren: prevalence and intra-oral distribution according to gender.

Objective: The purpose of this study was to describe agenesis of permanent teeth in children with respect to prevalence and intra-oral distribution according to gender.

Methods And Subjects: The study was population based and included all children in one district of the municipality of Aarhus, Denmark, in 1974-1979 (1657 girls and 1668 boys) and 1992-2002 (2409 girls and 2404 boys). The children underwent systematical clinical and radiographic examination.

Unilateral primary or secondary retention of permanent teeth, and dental malformations.

The purpose of the present investigation was to describe the dentition in subjects with local primary or secondary unilateral retention of two or more permanent teeth, and to elucidate the aetiology by comparing the regions of retention with the innervation pattern of the jaws. The material comprised radiographic dental orthopantomograms (OTP) from 12 patients with an age range of 6-18 years (six females and six males). The locations of retention and the dental morphology in the affected regions were analysed.

Oligodontia in Danish schoolchildren.

Oligodontia is a rare condition, and only limited data are available on its prevalence. The present paper is based on data from Danish schoolchildren. When these data are combined with comparable data on Danish schoolchildren published previously by the senior author, it is shown that oligodontia occurs in 0.

Orthodontic treatment-service studied retrospectively in a group of Danish children aged 15-16 years.

In a group of adolescent children in 9th grade attending a municipal dental health service, a certain amount of orthodontic treatment has been performed. 27% of the children had completed, or were undergoing, orthodontic appliance therapy. 9% of the children had completed extraction therapy only.