the term riga-fede disease has been used to describe chronic traumatic ulceration that occurs on the ventral surface of the tongue by natal and neonatal teeth in infants. it is important to diagnose the lesion and treat it by eliminating the source of trauma. in this case report, the neonatal tooth was extracted and after 2 weeks the lesion was resolved and the baby was feeding well.in addition...

Regional odontodysplasia is a rare developmental anomaly involving dental tissues. The precise etiology is not yet known. The affected teeth are usually small with atypical morphology with yellow or brown discoloration. One hundred and seventy six cases of regional odontodysplasia have been published to-date. Analysis of the published cases shows that the age at the time of diagnosis ranges fro...

A total of 139 extracted mandibular second molars were injected with India ink and demineralized. They were made clear and transparent with methyl salicylate, and the anatomy of their canals was studied. It was found that 86.3% of mandibular second molars had two roots, 9.3% had one root, and 4.3% had three roots. Ninety percent of the mesial roots of the mandibular second molars with two roots...

Teeth are the most durable and enduring structures of human anatomy, surviving fragmentation, partial incineration and severe decomposition. The role of teeth in identification is manifested as significant specifiers of deceased or living individuals. The characteristics of dental morphology are genetically-inherited and ascribable to racial or familial ancestry. Dental age identification is at...

Previous studies have suggested minor differences between primary and permanent teeth in terms of dentin composition and morphology. Other reports indicated lower bond strengths of resin composites to dentin of primary teeth compared with dentin of permanent teeth; however, no information is available regarding differences in the micromorphology of the resin-dentin interface that may explain th...

As a key core component of cotton pickers, the spindle is prone to wear hook teeth. This research explores characteristics teeth pickers under different working areas. The sampled spindles were cut, element composition and hardness tooth coating substrate determined, surface morphology was characterized, its area thickness extracted. Results show that main constituent elements are Cr Fe, respec...

Identifying isolated teeth of fossil selachians only based on qualitative characters is sometimes hindered by similarity in their morphology, resulting often in heated taxonomic debates. On the other hand, the use of quantitative characters (i.e. measurements) has been often neglected or underestimated in characterization and identification of fossil teeth of selachians. Here we show that, empl...

OBJECTIVE The aim of the present study was to evaluate the demographic profile of supernumerary molar (SM) teeth in people in various regions of Turkey. STUDY DESIGN A retrospective analysis was carried out on an initial sample of 104,902 subjects drawn from the ortopantographics files from 10 clinics in 7 Turkish cities with documentation of demographic data, the presence of SM teeth, their ...

Mature cystic teratomas are a form of ovarian germ cell tumor and often called ‘dermoid cysts’ because they are mostly cystic. Many teratomas have teeth with morphologically identifiable crowns and roots. The objective of this study was to carry out morphometric measurements of teratomatous teeth extracted from a mature cystic teratoma excised from a 28-year-old female patient. The extracted te...

The interaction between the two main competing geometric determinants of teeth (the geometry of function and the geometry of occlusion) were investigated through the construction of three-dimensional spatial models of several mammalian tooth forms (carnassial, insectivore premolar, zalambdodont, dilambdodont, and tribosphenic). These models aim to emulate the shape and function of mammalian tee...