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At least 577 records · Page 32Linked to original sources
PubMed1990

Effects of removing inferior alveolar neurovascular structures on mandibular growth and the eruption of permanent dentition in puppies.

Investigation was performed on the effects of removing the inferior alveolar neurovascular structures on the permanent dentition and mandibular growth. Five puppies with erupted deciduous teeth had the inferior alveolar neurovascular structures removed unilaterally. When the test animals were 28 weeks old, examination revealed that the deciduous teeth on the side operated had exfoliated but permanent teeth did not replace them. On the other hand, the permanent teeth on the side not operated on replaced the exfoliated deciduous teeth. After a second period of 28 weeks, the germs of the permanent teeth on the side operated on were still buried in the mandibular bone, and the permanent teeth on the side not operated on erupted normally. Mandibular measurements demonstrated that translative and transformative growth and developmental processes were normal in both the sides operated on and the sides not operated on.

Animals↗
PubMed1990

Orientation and eruptive patterns of the mandibular second premolar.

Distal migration of the mandibular second premolar into a first molar extraction site is a clinical finding often correlated with the early loss of a permanent mandibular first molar. Signs of this tendency can be detected radiographically as early as 6 to 7 years of age when the mineralization of the crown of the mandibular second premolar is almost complete. The results of a study of 2000 panoramic dental radiographs of children, aged 8 to 18 years, are reported.

Adolescent↗
PubMed1993

Third molars as an acute problem in Finnish university students.

The study was carried out to determine the risk of acute disease of third molars in young adult patients. The subjects in this case-control study were 100 consecutive university students who complained of third molar problems when making an appointment. The third molars were mostly mandibular, partly erupted, and distoangularly oriented. Severity of discomfort and interference with daily activities were graded by the patients on average as 5.0 (SD +/- 2.7) and 3.6 (SD +/- 2.9), on a scale from 0 through 10. Distoangular lower third molars caused the most discomfort and interfered most with activities of patients. The risk of acute disease in patients with distoangularly oriented third molars was 3.6 times that in other patients. Bivariate analysis showed that if the follicle of a distoangular third molar were enlarged, the risk of acquiring acute disease was 44 times that in other patients. It was concluded that early removal of partially erupted and distoangularly oriented lower third molars is recommended, especially when they are associated with an enlarged follicle.

Acute Disease↗
PubMed1993

Third molars confusing the diagnosis of carcinoma.

The purpose of this study was to describe cases of oral cancer in which the initial presenting symptoms were considered to be due to third molars and in which the underlying carcinoma therefore escaped early diagnosis. Between 1986 and 1990 a total of five cases with squamous cell carcinoma associated with a third molar (impacted, partially or totally erupted, or recently extracted) were treated at our unit. Because of acute or chronic symptoms related to disturbed eruption of third molars, the detection of a simultaneous malignant change and referral were delayed. In conclusion, all third molars, especially impacted, partially erupted, or overerupted ones, should be examined critically, especially if the patient has symptoms.

Adult↗
PubMed1994

Incompletely erupted third molars in the line of mandibular fractures. A retrospective analysis of 57 cases.

A retrospective investigation was carried out of 57 cases of mandibular angle fractures, where a completely or partially impacted third molar was present in the line of fracture. Closed reduction was used in all of the cases, using intermaxillary fixation over a period of 42 days. Antibiotics were given to all patients for a period of 1 week. Thirty-one patients (55%) were treated within the first 24 hours and 43 (75%) within 48 hours. Infection at the fracture site occurred in two patients (3.5%). Both of these patients had been treated within the first 24 hours. It is concluded that closed reduction with retention of the mandibular third molar within the line of a mandibular angle fracture can be carried out with less morbidity compared with cases in which rigid fixation is used and movement of the jaws permitted immediately. Because of the size of the study group, no relationship could be demonstrated between cases with infection and the time from trauma to fixation.

Adolescent↗
PubMed1994

Limitation of panoramic radiography in diagnosing adenomatoid odontogenic tumors.

Adenomatoid odontogenic tumor is frequently not diagnosed preoperatively even when radiographs are available. This study evaluates radiographic findings with special emphasis on the characteristic radiopacities of adenomatoid odontogenic tumor. In correlating radiologic findings with pathologic findings, differences in diagnostic accuracy between intraoral periapical and panoramic radiographs were found. The intraoral periapical radiograph allows perception of the radiopacities in adenomatoid odontogenic tumor as discrete foci having a flocculent pattern within radiolucency even with minimal calcified deposits. Panoramic radiography was often unable to demonstrate radiopacities in adenomatoid odontogenic tumor when the calcification was minimal. The result indicates that intraoral radiographs may be essential for correct radiographic interpretation of an adenomatoid odontogenic tumor in the presence of minimal quantities of calcified deposits.

Adolescent↗