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At least 559 records · Page 31Linked to original sources
PubMed1991

Primary impaction of primary teeth: a review and report of three cases.

Primary impaction of primary teeth is rare. Only ten cases have been found in the world literature. It affects almost always second molars and the finding is usually occasional. Three cases of this abnormality, two of the upper jaw and one of the mandible, are presented. The analysis of the characteristics of these cases and the cases in the literature, suggests that ankylosis has probably a leading role in the etiopathogenesis. The following criteria for a correct diagnosis is presented: 1) deep retention into the bone; 2) absence of caries, restorations and resorptions; 3) frequent passing of the corresponding permanent premolar; and possible retention of the corresponding adjacent tooth. More attention is recommended in the study of the lesion for the future.

Adolescent↗
PubMed1991

[An embryological analysis of the variation in the lipid content of the dental pulp at different developmental stages].

The authors have considered the per cent differences of lipidic content in Bos taurus dental pulp taken from differently aged animals. The studies have been carried out on 6-7 months fetus, on 1-2 years old animals (deciduous erupted tooth and developing non erupted permanent teeth) and on 8-10 years old animals. Moreover the percentages of free and esterified cholesterol, fatty free acids, triglycerides as well as different phospholipids have been calculated.

Aging↗
PubMed1990

Oral complications associated with endotracheal general anesthesia.

A series of 745 consecutive cases of endotracheal anesthesia were collected at the National Taiwan University Hospital. Evaluation of the oral conditions was performed before, during and after the anesthesia. Injuries to oral structures were recorded. An 18% incidence of oral injuries was noted and the frequency for dental damage was 12.1%. Maxillary incisors, especially the left ones, were accident-prone. Risk factors identified in this study included large decay or restoration, advanced periodontitis, presence of dental prosthesis, shedding deciduous tooth, class II jaw relationship and anterior crowding. More than one third of the complications occurred during the maintenance or emergence stage of the anesthesia. Recommendations for prevention and management of this problem were given.

Adolescent↗
PubMedDate not supplied

Occlusal disturbances resulting from neglected submerged primary molars.

Several studies indicated that submerged teeth have no long-term effect on occlusal development. Individual cases, however, may present extreme complications. Lack of close supervision, in such instances, may lead to serious consequences. Two cases of negligence (one on the parents' part and the other a consequence of the dentist's carelessness) are presented. The need for a close follow-up of submerged teeth is emphasized, and a rigid periodical recall schedule is suggested.

Ankylosis↗
PubMed1990

Triplication and twinning in one dental arch: report of a case.

This report documents the case of a young patient who presented with dental conjoining anomalies in both sides of the maxillary arch. One defect involved primary incisor twinning and the other a rare instance of primary incisor triplication--three conjoined teeth.

Child, Preschool↗
PubMed1990

[Odontology and orthodontics during the renaissance (Bartholomeo Eustachio)].

During the Renaissance (14th-16th cent.) many significant progresses were noticed in the field of Anatomics. This was a result of the fact that many Greek intellectuals had been forced to immigrate to N. Italy because of the conquest of Constantinople and the dissolution of the Byzantine Empire. On the other hand, the dissection of human bodies had been allowed. During this flourishing the first among the most famous dessectors of that time was Andrea Vesalius succeeded by Bartholomeo Eustachio, professor of Anatomics at the famous, that time, university of Sapienza (N. Italy). Eustachio is the first scientist who was systematically dealt with the biology of Dental System, having the work under the title "Libellus de Dentibus" published at Venice in 1563. By this work, Eustachio gives the most precise description of the Dental System, his development as well as of the dental abnormalities. In more specific words, he brought to light in any detail and for the first time, the phenomena characterizing the development of this system, described in details the morphology of each tooth (deciduous and permanent), the formation in the uterus of the dental germs, as well as the non synchronized fact of their development. He, furthermore, distinguished (classified) the Dento-facial abnormalities into abnormalities of the teeth, of the alveolar and of the maxillae. Eustachio born at San Severino of Angona, died in 1574 but most of his works were published after his death as most important.

Anatomy↗
PubMed1990

[The dental teaching of G. Blasius (1626-1682)].

According to Blasius there are only ten bones in the face. He still believes that the canine reaches the orbita, that the root of the deciduous tooth generates the permanent tooth, and that the teeth permanently grow. His dental pathology and therapy compared to the knowledge of contemporary authors is incomplete: dentitio difficilis, epulis and parulis are not mentioned.

Anatomy↗
PubMed1990

Bilaterally inverted impaction of upper primary central incisors.

A case of bilaterally inverted impaction of the upper primary centrals of a 3-year-old Chinese girl is reported. This dental anomaly rarely occurs in primary dentition. To our knowledge, this is the first report to describe such a dental anomaly.

Child, Preschool↗
PubMed1990

Surgical exposure and orthodontic alignment of an unerupted primary maxillary second molar impacted by an odontoma and a dentigerous cyst: a case report.

This report describes the surgical and orthodontic management of a 3-year old girl with an unerupted primary maxillary second molar impacted by an odontoma and a dentigerous cyst. Following surgical removal of the odontoma and dentigerous cyst, further surgical intervention and orthodontic traction were required to bring the primary maxillary second molar into correct occlusion with resultant proper functioning and good periodontal health.

Child, Preschool↗