1/42. Dysosteosclerosis: a case with unique dental findings and SEM evaluation of a hypoplastic tooth.A ten-year-old boy, who had the typical dental findings of dysosteosclerosis such as yellowish, hypoplastic teeth, retarded eruption, which upon eruption, decayed rapidly, is presented. To date this is the first known case reported with a congenital absence of the first permanent molars. Furthermore, SEM evaluation of the enamel and dentin was performed on a tooth from a patient with dysosteosclerosis for the first time. These studies showed weak ultrastructural compositions due to irregular calcification.- - - - - - - - - - ranking = 1keywords = tooth (Clic here for more details about this article) |
2/42. Oral findings in digeorge syndrome: clinical features and histologic study of primary teeth.OBJECTIVE: For the purpose of supplementing the shortage of dental information about digeorge syndrome, we report two cases of the syndrome seen in Japanese boys. STUDY DESIGN: Two cases were compared with respect to orofacial and dental findings; one was a case of complete digeorge syndrome and the other a case of partial digeorge syndrome. Extracted deciduous teeth from the two boys underwent histologic study. RESULTS: Each patient showed systemic developmental delay, hypocalcemia, and slight mental retardation. In the orofacial area, hypertelorism, a short philtrum, thick and reflected lips, and hypoplasia of the nasopharynx were also observed. A dental examination showed delayed formation and eruption of permanent teeth, aplasia of the nasopharynx, and enamel hypoplasia along with enamel hypocalcification. Structural streaks with increased calcification were histologically detected in the deciduous tooth from the patient with complete digeorge syndrome. CONCLUSIONS: Common characteristic orofacial and dental findings were noted in the two digeorge syndrome cases. Furthermore, histologic study of the deciduous tooth from the boy with complete digeorge syndrome suggests that there was some relationship between transient relative hypercalcemia and dentinal hypermineralized streaking of the tooth.- - - - - - - - - - ranking = 0.6keywords = tooth (Clic here for more details about this article) |
3/42. Abrasion, erosion, and abfraction combined with linear enamel hypoplasia: a case report.Linear enamel hypoplasia is a developmental disturbance of enamel resulting in clinically visible horizontal defects in enamel that are present on eruption of the tooth. Nondevelopmental lesions of the hard tissues of the tooth, including carious, abrasion, erosion, attrition, and abfraction lesions, require varying amounts of time after tooth eruption to develop. Because linear enamel hypoplasia lesions are present on eruption and are exposed to the factors responsible for abrasion, erosion, and abfraction, nondevelopmental lesions could occur within them in any combination. This report describes a patient with multiple teeth with linear enamel hypoplasia lesions containing nondevelopmental defects as well as nondevelopmental defects that occurred separately. Severe pain and a unique lesion morphology were associated with the linear enamel hypoplasia defects. Affected teeth were extracted because of advanced periodontitis and were sectioned to determine the nature of the enamel and dentin lesions.- - - - - - - - - - ranking = 0.6keywords = tooth (Clic here for more details about this article) |
4/42. Malformation in the primary and permanent dentitions following trauma prior to tooth eruption: a case report.Dento-facial injuries that occur prior to the eruption of teeth in the primary dentition are rare, but can result in damage to the primary dentition. We report a rare case where an injury to the anterior maxilla and mandible of an infant prior to primary tooth eruption resulted in hypoplasia, displacement and impaction of the primary dentition and damage to a developing permanent tooth.- - - - - - - - - - ranking = 1.2keywords = tooth (Clic here for more details about this article) |
5/42. Simultaneous occurrence of unusual odontodysplasia and oligodontia in the permanent dentition: report of a case.odontodysplasia is an uncommon clinicopathological condition with a variety of expressions. Although it is generally recognized as a localized disorder of dental tissue, its aetiology has not yet been well explained. In the present case, odontodysplasia with oligodontia in the permanent dentition is reported. The patient was in good health with normal stature and no other physical abnormalities. His parents and siblings were dentally and medically normal. The primary teeth appeared to be normal except for the primary second molars, where the enamel was malformed. However, the permanent incisors that had erupted into the oral cavity showed rough and hypoplastic enamel. An orthopantomogram showed 17 congenitally missing permanent teeth and malformation of the other 11 permanent teeth and tooth-germs. Because these findings were caused by developmental disturbances of both the mesodermal and ectodermal dental components, we diagnosed the present case as odontodysplasia accompanied by oligodontia in the permanent dentition.- - - - - - - - - - ranking = 0.2keywords = tooth (Clic here for more details about this article) |
6/42. Histological and analytical studies of a tooth in a patient with cleidocranial dysostosis.A histopathological and analytical study of a permanent tooth from a patient with cleidocranial dysostosis (CCD) was performed. The patient was a 47-year-old woman, who had 10 erupted permanent teeth and 2 partially erupted and 19 completely impacted teeth, including supernumerary teeth. The erupted right upper premolar was extracted and observed using a light microscope and an electron probe X-ray microanalyzer (EPMA). Findings showed enamel hypoplasia, predominantly irregular globular dentin and Tomes' granular layer, and a complete lack of cellular cementum in the ground section. The incremental von Ebner and counter Owen lines were obscure. Comparative quantitative analysis using the EPMA showed that the quantities of calcium and phosphate were lower in the enamel and dentin than those of the control sample.- - - - - - - - - - ranking = 1keywords = tooth (Clic here for more details about this article) |
7/42. Otodental syndrome: a case report and genetic considerations.A 5-year-old boy presented with otodental syndrome. His maxillary and mandibular incisors were within normal limits. The premolar/molar areas in all quadrants were occupied by markedly macrodontic teeth showing globular shape. The canines had a similar rounded shape. Two canines and 1 of the other abnormal teeth demonstrated areas of yellow hypoplastic enamel. Radiographs revealed that some of the abnormal teeth had bifurcated pulp chambers and pulp stones. Premolar tooth germs were absent. audiometry demonstrated that the child had a marked bilateral sensorineural hearing loss for frequencies above 1000 Hz. No other members of the immediate family were clinically affected. The parents of the child were not aware of any similarly affected relatives. Suggestions with respect to possible genetic mechanisms and gene participation in the etiology of this syndrome are offered.- - - - - - - - - - ranking = 0.2keywords = tooth (Clic here for more details about this article) |
8/42. amelogenesis imperfecta: diagnosis and resolution of a case with hypoplasia and hypocalcification of enamel, dental agenesis, and skeletal open bite.A case of amelogenesis imperfecta with hypoplasia, hypocalcification of the enamel, congenital absence of teeth 12 and 22, delayed eruption of tooth 23, edge-to-edge incisal relationship, open bite, and bilateral posterior cross bite at the level of the first and second premolars is presented. Lateral skull teleradiography indicated a Class III skeletal pattern of maxillary origin associated with a dolichofacial pattern with multiple indicators of facial hyperdivergence. The patient presented a major esthetic abnormality of the face and required orthodontic treatment prior to a prosthetic solution with full-coverage metal-ceramic crowns in both the maxilla and the mandible. The diagnosis of cases such as this one and the therapeutic implications from an orthodontic and prosthetic standpoint are reported.- - - - - - - - - - ranking = 0.2keywords = tooth (Clic here for more details about this article) |
9/42. Esthetic rehabilitation of anterior teeth affected by enamel hypoplasia: a case report.Alterations during tooth structure formation, mainly on anterior teeth, are known to severely compromise esthetics. This article presents a case report in which the etiology and clinical characteristics of anterior teeth affected by enamel hypoplasia are analyzed. The restoration treatment sequence is also discussed, demonstrating that the use of a hybrid and a microfilled composite associated with tooth hybridization (interdiffusing zone) can be used to conservatively rehabilitate a smile. CLINICAL SIGNIFICANCE: This article presents a simple and conservative technique for restoring disfiguring areas of enamel hypoplasia to achieve an optimally esthetic result.- - - - - - - - - - ranking = 0.4keywords = tooth (Clic here for more details about this article) |
10/42. Hypoplasia of primary and permanent teeth following osteitis and the implications of delayed diagnosis of a neonatal maxillary primary molar.A 2-year-and-6-month-old Japanese girl with delayed eruption of a maxillary right primary canine and disturbance in the development of maxillary right primary molars was examined. The crown of the maxillary right first primary molar was severely decayed and hypoplastic. The periodontal tissues on the maxillary right posterior region were swollen and slight erythrogenic change was observed. Radiographic examination revealed a disturbance in the development of the permanent successor and the primary teeth in the maxillary right quadrant. According to the history, the maxillary right first primary molar had erupted on day seven after birth. It is suggested that the disturbance in development of the permanent successor and the primary teeth was secondary to osteitis caused by infection of the neonatal tooth. Appropriate dental treatment had not been administered for more than two years because the neonatal molar had not been diagnosed.- - - - - - - - - - ranking = 0.2keywords = tooth (Clic here for more details about this article) |
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