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A case of combined epithelial odontogenic tumor associated with an unerupted maxillary canine tooth is described. The relative proportion of adenomatoid odontogenic tumor tissue and calcifying epithelial odontogenic tumor areas in a given tumor in determining the behaviour and growth potential of this entity is discussed.
Dentigerous cyst is one of the most prevalent types of odontogenic cyst and is associated with crown of an unerupted or developing tooth. Dentigerous cyst is more commonly seen with mandibular third molar and maxillary canine and rarely other teeth are involved. Here we report a case of dentigerous cyst involving permanent maxillary central incisor.
Retention, that is, a permanent tooth which is unerupted more than a year after the normal age of eruption, is a relatively rare event, except in the case of the third molars and the upper canines. Transmigration is defined as the phenomenon of more than half an unerupted impacted tooth crossing the midline. We report the clinical case of a twenty-year-old patient presenting transmigration of the lower left canine, with a type 4 transmigration pattern (Mupparapu). Likewise, we carried out a review of the literature of the cases that have been published on transmigration, updating the main aspects of this pathology.
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Almost twice as much fatty acid was extracted without demineralization from the mature enamel of erupted teeth treated with 2:1 chloroform-methanol as from the enamel of unerupted teeth (32.64 micrograms/g versus 15.60 micrograms/g). Palmitic C16:0, stearic C18:0, oleic C18:1 omega 9 and linoleic acids C18:2 omega 6 were the chief fatty acids detected by gas-liquid chromatography. The percentage of free fatty acids and diglycerides was larger in unerupted than erupted teeth, whereas that of triglycerides, phosphatidylethanolamine and phosphatidylcholine was larger in erupted teeth. These changes may be due to bacteria and other contaminants (saliva and pellicle). The large amounts of free fatty acids, diglycerides, cholesterol and phospholipids as intrinsic components were probably due to the persistence of membrane remnants entombed during enamel formation, as indicated by the visualization of holes and by the increase in the size and number of focal holes after lipid-solvent interaction with the enamel surface. These defects always occurred in rods and never in inter-rod material. Other minute defects, including empty-widened intercrystal spaces, were also observed inside some rods.
A case is described in which two separate developmental odontogenic cysts were associated with an unerupted lower third molar tooth. Radiological and histological examination showed that these were a lateral periodontal cyst and a follicular (dentigerous) cyst. This unusual occurrence provides substantial evidence that the periodontal cyst may have an origin from the cell rests of Malassez.
An unerupted maxillary third molar tooth from a 57-year-old Caucasian male, which showed radiographic evidence of crown resorption, but was otherwise symptomless, was examined post-extraction by light and scanning electron microscopy. (SEM) Appearances of the residual dental tissues were consistent with a diagnosis of an invading external resorption with formation of pulpal granulation tissue, dentinal resorption and some dentinal metaplasia. SEM of crown fragments indicated a generally uniform pattern of enamel resorption, for which the ameloblasts rather than multinucleate cells were implicated. By extrapolation of the activity of the former cells during the late stages of amelogenesis and tooth eruption, it is suggested that resorptive activity of and by enamel epithelium may explain not only the coronal origin of this type of idiopathic resorption, (which is otherwise unexplained), but also its progress into the pulp and the pulp reactions.
The causes of tooth impaction are as numerous as are ways to manage the problem. Treatment is usually instituted only after an unfavourable eruption prognosis of the impacted tooth has been established from radiographic and clinical examination. Advantages of guided eruption and surgical removal have to be weighed. Fifteen cases of various degrees of impaction, difficulty of treatment, complications and failures of eruption are discussed.
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AIM: The aims of this study were firstly to determine the fate of unerupted permanent maxillary incisor teeth following supernumerary tooth removal and secondly to make recommendations regarding the management of such incisor teeth following supernumerary tooth extraction. STUDY DESIGN: This is a retrospective study. METHODS: Records of children attending the Departments of Paediatric Dentistry, Edinburgh Dental Institute, Lothian Primary Care NHS Trust and Dundee Dental Hospital, Tayside University Hospitals Trust between 1995 and 2002 were examined with regard to non-eruption of one or both maxillary central incisors in association with supernumerary teeth requiring surgical removal. Subsequent permanent maxillary incisor eruption was recorded and in those cases of incisor non-eruption, further surgical interventions were noted. RESULTS: In all 118 sets of patient records were included in the study (87 males, 31 females) with a mean age at presentation of 8.8 years (range 5.3-11.6 years). Failure of eruption of the associated permanent maxillary central incisor teeth occurred in 27% of cases, in relation to both conical and tuberculate supernumerary teeth. All tuberculate supernumerary teeth associated with non-eruption cases were palatally placed and 59% were adjacent to maxillary incisors with near complete apex formation. To facilitate incisor eruption in these cases, 41% required surgical exposure of the non-erupted incisor tooth and 59% required surgical exposure with bonding of an orthodontic bracket and gold chain for orthodontic traction. CONCLUSION: Non-erupted permanent maxillary incisor teeth with near complete apical formation, associated with palatally placed, tuberculate-shaped supernumerary teeth, may benefit from having an orthodontic bracket and gold chain placed at the same time as the surgical procedure to remove the supernumerary tooth to facilitate future orthodontic traction.
Three hundred ninety-six odontomas were included in this study, with each case assigned to one of three categories using commonly accepted histologic criteria for compound and complex forms. Analysis revealed that compound odontomas were the most common type (70 percent of all cases). They were most common in the 11 to 15-year-old age-group and in the maxillary incisor area or the canine regions of either jaw. There was a nearly equal sex distribution. Complex odontomas showed similar age and sex distribution; they had a greater tendency to occur in the molar regions. Complex odontomas were also associated with unerupted teeth more often than compound odontomas. Tooth agenesis in the area of an odontoma or the impaction of a primary tooth by an odontoma occurred infrequently. This study showed that there is a correlation between the site of an odontoma and the age at which it is generally treated.
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Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
We retrospectively reviewed the clinical records and radiographs of 100 patients who had had supernumerary teeth removed. Their mean (SD) age was 9 years 3 months (2). The 100 patients had a total of 127 unerupted maxillary incisors associated with supernumerary teeth. The supernumerary tooth was removed without exposure of the permanent tooth more often among the 79 younger children (aged 10 years or less) (SND=3.52, P<0.01), and when the incisors were less mature (Cvek classification 1, 2, and 3) (SND=5.27, P<0.01). Of these incisors with immature roots that were treated conservatively, 60 (72%) erupted and 24 (28%) required further operation. Of the mature incisors treated conservatively, 10 (63%) required further operation. In this study, almost three-quarters of immature incisors erupted spontaneously after removal of the associated supernumerary teeth. Over half of the mature teeth required further operation. Mature teeth should be exposed with or without bonding at the time of removal of the supernumerary teeth.