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At least 1,027 records · Page 57Linked to original sources
PubMed1990

[The condition of dentition and the prediction of eruption at lower third molars of Japanese adolescent males].

This study was examined the relationships between the condition of dentition of lower third molar and malocclusions and shape of mandibles, and to predict eruption for third molars by their relationships. Data were obtained from 90 degrees and 60 degrees rotated cephalometlic radiographs, orthopantomographic radiographs, mandibular occlusal films and gnathostatic models of 101 males showing a complete permanent dentition anterior to the second molars and who had not had extraction lower their molars and orthodontic treatments, were selected from 147 dental students at Asahi University. they were divided into 8 groups by condition of lower third molar dentitions. Bilateral presence of lower third molar occurred in 69.3% and unilateral in 20.8% on 60 degrees rotated cephalometlic radiographs. Bilateral eruption or half eruption occurred in 24.7% and impaction in 44.6% on gnathostatic models. Coronal arch length of erupted cases was longer than that of impacted cases. A apired t-test revealed the significant difference (p less than 0.05). Over bite of impacted cases were deeper than that of erupted cases (p less than 0.05). Arch length discrepancy of presented and impacted cases were larger. There were normal occlusions in each group. Most mal-occlusions were prognathia, second to deep bite, bi-maxillary. The most frequent lower arch conditions were crowding (65%). I. M. P. A. of bilateral impacted cases were langer. Mandiblar length (Cd-Pog) of erupted cases were longer. The distance from Xi-point to the distal surface of second molar was border at 25mm for lower third molar eruption.

Adolescent↗
PubMed1990

[Treated case with horizontally impacted mandibular first molar caused by submerged primary molar].

A case is here presented in which mandibular first molar was horizontally impacted under the submerged primary molar. The patient was an 8 year-old-boy referred from a general dentist through the Department of Pedodontics in this hospital, whose chief complaint was a horizontally impacted mandibular first molar. Skeletally, diagnosis revealed an Angle Class II Division 2 malocclusion. The impacted first molar was uprighted with a lingual arch and a utility arch following the extraction of the submerged primary molar. The submerged primary molar was probably ankylosed causing a locking of the first molar which rotated as the root formed. The result of rotation during forming twisted the roots of the first molar, which will make root canal treatment difficult if the pulp is infected in the future. It may concluded that dental arches should be carefully observed even in the deciduous dentition.

Ankylosis↗
PubMed1975

The teeth.

Explore the source record for details and available documents.

Amelogenesis Imperfecta↗
PubMed1990

[Experience with surgical-orthodontic management of impacted and retained upper canines].

On basis of experiences obtained in the course of the surgical orthodontic treatment of 26 upper impacted and retained, respectively, incisors it has been established that, at given conditions, positioning the incisor into occlusion should be tried, even if the axis position approaches 90 degrees. The lesion is discovered relatively lately, many do not risk the treatment and the number of interrupted treatments is high as well. There is possibility to avoid possible complications, interruption of joining to force system, loss of anchorage, pulpa necrosis, root resorption, cysta follicularis.

Child↗
PubMed1990

[Retained canine. Surgical exposure and guided traction].

The Authors, after making a distinction between retained and included canine, examine the local and general causes of retention; moreover they illustrate clinical and radiological methods to reach the correct diagnosis; finally they highlight the importance of parodontal tissues during surgical treatment and particularly they describe a clinical case of surgical exposure and subsequent "under mucosal traction" on an intermediate retained canine.

Cuspid↗
PubMedDate not supplied

[Gardner syndrome].

Three patients, sisters of B, 12 and 14 years of age with a diagnosis of Gardner's Syndrome are reported. The family history indicated that their mother died of a carcinoma of the intestine at the age of 30. This Syndrome, which is of dominant autosomic inheritance, can be seen in aur city, with so heterogeneous hereditary features. Dentists must know the oral cavity characteristics of this disease (odontomas, cementomas, cysts, supernumerary teeth) that accompany gastric, intestinal, skeletal and tissular disturbances an of other organs (polyps, osteomas, cysts, adenomas), being intestinal poliposis of the colon the most important feature that becomes an "Adenocarcinoma", in the third ald fourth decade in a 100% of the cases. Its incidence in our city is real. The proper diagnosis is made when the clinical study is completed and the dentist may be the first one to watch this syndrome's feature in the oral cavity. A proper medical diagnosis would allow a preventive procedure and a patient's control until the "total surgery of the colon", which is the appropriate therapeutic procedure, is achieved; although there are controversies as regards the time to be carried out.

Adolescent↗
PubMed1989

Surgical and orthodontic management of compound odontoma.

Practitioners should always consider the possibility of an odontoma when the eruption of teeth is delayed. The authors report an example of compound odontoma associated with delayed eruption of incisor teeth, and describe the surgical and orthodontic management of the case.

Child↗
PubMed1977

Ameloblastic fibroma.

A case of an ameloblastic fibroma in the mandible of a 14-year-old boy with a six-month follow-up is reported. A brief comparison is made between the ameloblastic fibroma and the simple ameloblastoma.

Adolescent↗