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A dental an omaly causing complaints is described which was cleared up in the course of focus examination. The successful removal and identification of the surplus small molar dens geminatum after clinical and x-ray examinations are reported on.
The skull of a prehistoric, Middle Mississippian, American Indian shows two mesodens that migrated to the distal margin of the palate. These teeth are positioned in such a way as to avoid the most common intraoral forces affecting tooth movement. The resorption of the palatal bone, distal to the teeth indicates movement caused by forces predicted by the Blood Vessel Thrust Theory.
After having examined the many theories on the pathogenesis of molar polydontias, the paper describes a very interesting clinical case involving the lower 4th molar. The results suggest that the most reliable theories are those postulating either the hyperactivity of the epithelial tract or the proliferous production of enamel (in the broadest sense).
This case report describes a labially positioned maxillary midline mesiodens in an 8-year-old male. The clinical and radiographic appearance and therapeutic considerations are presented. The purpose of this article is to alert the clinician to the importance of radiographic localization prior to surgical intervention, because in some instances a labial surgical approach is preferred over the traditional palatal technique. In this case a labial surgical approach was utilized which allowed for greater conservation of alveolar bone and improved access during removal of the mesiodens.
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The records of 3,056 orthodontic patients, for whom adequate orthopantomogram radiographs were available, were examined to assess the prevalence of hypo-hyperdontia. The level of 0.45% was in line with previous studies. However, only 131 patients were eligible to be assessed for congenital absence of third molars. It may be that if a more mature sample were examined, the actual prevalence might be higher than the quoted figure.
Two rare cases of dentigerous cysts arising from mesiodens are presented. The pathogenesis, differential diagnosis and management of this condition are discussed.
After presenting the aetiopathogenetic, clinical, radiological and therapeutic aspects of cleidocranial dysostosis syndrome, a case is reported. The patient, a boy of 14, was the subject of examination since birth.
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The authors describe the case of mesiodens in two non-identical twins and in their grandfather. They recall that, although no investigation confirmed the hereditary nature of the mesiodens, it is quite undeniable in view of the frequency of familial cases. They think there is a recessive gene on an autosome and a gene on the inhibiting chromosome X. They discount the theory of mutation.
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Explore the source record for details and available documents.