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At least 289 records · Page 16Linked to original sources
PubMed1989

Cleidocranial dysplasia: a light microscope, electron microscope, and crystallographic study.

An unusual case of cleidocranial dysplasia associated with more than 60 unerupted teeth is presented and examined with light and scanning electron microscopes and crystallographic techniques. The present case revealed pseudoprognathism with facial asymmetry, the right side being larger than the left. The extracted teeth showed enamel hypoplasia in light and scanning electron microscopy, yet the crystalline composition did not differ from that of the normal teeth. The potential causes of lack of eruption and supernumerary tooth formation in cleidocranial dysplasia are discussed.

Adult↗
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

Computed tomography of the jaws in familial adenomatosis coli.

Familial adenomatosis coli is known to be associated with tooth impactions, odontomas, and osteomas. Three cases were examined by panoramic radiography and computed tomography. Computed tomography was especially useful for detecting osteomas in the maxilla and also revealed a wavy cortical thickening in the mandible in one instance. The latter finding has been reported for other bones in the body but not previously for the mandible.

Child↗
PubMed1985

Squamous odontogenic tumor related to an unerupted lower canine.

A new case of squamous odontogenic tumor (SOT) is presented. This is the seventeenth case of SOT to be reported and the first reported case related to a lower unerupted canine. A review of the literature reveals the extreme variability of the clinical and radiologic features of this tumor. Conversely, the microscopic characteristics of SOT are clearly defined: numerous islands of benign squamous epithelium scattered in an apparently mature connective tissue, absence of peripheral columnar cells with palisading nuclei, and absence of stellate reticulum. Keratin pearl formation, intraepithelial microcyst formation, and calcification are present to a variable extent. A circular arrangement of fibroblasts and fibrous condensation and/or hyalinization are observed around some epithelial islands, suggesting a reaction of the connective tissue to the epithelial proliferation. The observation of small epithelial islands near the apical surface of the retained tooth supports the theory that the tumor originates from Malassez's rests. The treatment of choice seems to be conservative, with thorough enucleation, but it should be borne in mind that multifocal cases have been described.

Connective Tissue↗
PubMed1990

Morbidity associated with incompletely erupted third molars in the line of mandibular fractures.

A retrospective analysis of 105 mandibular fractures associated with incompletely erupted third molars was undertaken. It was found that there was no difference in the rates of complication if the teeth were retained or extracted, or if an open or closed reduction was performed. The combination of tooth retention with open reduction, however, shows a trend toward being the treatment most prone to postoperative complications.

Fracture Fixation↗
PubMed1992

Odontogenic keratocysts: a clinical and histologic comparison of the parakeratin and orthokeratin variants.

Four hundred forty-nine cases of odontogenic keratocyst (OKC) were separated into three histologic categories: parakeratinized, orthokeratinized, or a combination of the two types. Demographic and clinical data, such as anatomic location and recurrence, were obtained from the biopsy forms. Results showed that 86.2% of the 449 cases were parakeratinized, 12.2% were orthokeratinized, and 1.6% had features of both orthokeratin and parakeratin. There were no statistically significant differences between orthokeratinized and parakeratinized OKCs when age, race, sex, presenting symptoms, and the clinical impression were compared. The orthokeratinized OKC was more often associated with an impacted tooth (75.7%), as compared with 47.8% for the parakeratinized OKC (P = .001). Parakeratinized OKCs recurred in at least 42.6% of the cases, compared with only 2.2% for orthokeratinized OKCs. This study emphasizes the importance of distinguishing between the parakeratin and orthokeratin variants of OKC. In addition, data are presented that show the need for longer follow-up than previously documented.

Adult↗
PubMed2005

Dental team management for a patient with cleidocranial dysostosis.

Cleidocranial dysostosis is a rare autosomal condition that affects ossification. The dental abnormalities associated with it present a remarkable challenge in orthodontic treatment planning. Early diagnosis is extremely important to give the patient the best treatment options. Patients with cleidocranial dysostosis require a team approach with good communication and cooperation from the patient. Timing of the intervention is critical, and many surgeries might be required. The patient in this report was treated with a team effort that involved several dental specialties to achieve an optimal result.

Child↗
PubMed2004

Clinical outcome of third molars in adults followed during 18 years.

PURPOSE: The aim of the present study was to follow the clinical changes in third molar status during an 18-year period in patients aged 20 to 38 years. PATIENTS AND METHODS: The series consisted of 118 subjects (37 men and 81 women). In the beginning of the study, the mean age was 20.2 years (SD, +/-0.6 year), and at the end, it was 38.6 years (SD, +/-0.6 year). Panoramic radiographs were taken at baseline and at age 38. All of the subjects were clinically examined at baseline and at the end of the study. A portion of the subjects (n = 69) were also examined at age 32. RESULTS: Most of the initially unerupted third molars were removed during the follow-up period (73%, maxilla and mandible together). More than half of the initially partially erupted third molars were removed during the follow-up period (64%, maxilla and mandible together). The percentage of erupted third molars found in the mouth at age 38 increased significantly depending on the initial status. Of the initially unerupted, partially erupted, or erupted third molars, 10%, 33%, and 50%, respectively, were erupted at age 38 (maxilla and mandible together). Changes in the status of third molars continued from age 32 to age 38, although to a lesser extent (8%). The 3 third molars with advanced eruption were all maxillary teeth in men. CONCLUSION: Third molars undergo continuous clinical change on a reduced scale at least up to the age of 38 years.

Adult↗