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At least 1,549 records · Page 86Linked to original sources
PubMed2004

[An example of "leveling extraction" for repair of the 21st tooth supraposition].

A supercomplect retained tooth, situated under the 21st tooth, was removed in order to eliminate the supraposition (vestibular position) of the 21st tooth under conditions of lack of place in the dental arch. The 14th tooth on the contralateral side of the jaw was removed in order to maintain the symmetry and order of the anterior part of the maxillary dental arch and for creating place for the 21st tooth. Further transposition of the 13th tooth to the place previously occupied by 14th tooth, 11th tooth instead of 12th tooth, and establishment of the 21st tooth into correct position in the dental arch were carried out using orthodontic devices.

Adolescent↗
PubMedDate not supplied

Oral manifestations of Ehlers-Danlos syndrome type VII: histological examination of a primary tooth.

A two-year, 2-month old girl with Ehlers-Danlos syndrome Type VII is described. The patient presented with bleeding after tooth brushing, and exhibited microdontia and yellow discoloration of teeth. She had carious teeth, but did not exhibit periodontal disease, poor wound healing after extraction, radiographic evidences of pulp stones, or malformed roots. Microscopic examination of a decalcified section of an extracted tooth stained with H & E demonstrated some inclusions in the dentin, around which collagen was either missing or scanty, as confirmed by counterstaining with van Gieson's solution. The sections of pulp stained with van Gieson's solution showed an abnormal pattern of fibrous tissue. Furthermore, the radiopacity of the dentin of this patient was significantly higher than that of the control dentin.

Child, Preschool↗
PubMed1978

[A ranking scale of the susceptibility to loss of various types of teeth as an additional aid to the decision for the extraction of permanent teeth in orthodontic treatments].

A statistically established rank scale of the predisposition to decay of the different types of teeth permits to evaluate more exactly the sacrifice of masticatory units in orthodontically indicated tooth extraction. Thus, in case of doubt, it gives additional advice on the choice of the teeth to be removed.

Child↗
PubMedDate not supplied

[Implantation of flakes of castor oil resin in rat dental alveolus].

The purposes of the present study were: 1) to investigate the biocompatibility of a natural resin (made of fatty acids extracted from Ricinus communis) implanted in the dental alveolus of rats and 2) to verify any possible interference of that material in the osseous healing following tooth extraction. The resin (AUG-EX, Poliquil Araraquara Polímeros Químicos LTDA, Araraquara--SP) was placed inside de alveoli immediately after extraction of the upper right incisors. The animals were sacrificed 1, 2, 3 and 6 weeks after extraction or extraction + implantation. The hemi-maxillae were decalcified and processed for paraffin embedding. Longitudinal 6-micrometer-thick semi-serial sections stained with hematoxylin and eosin were obtained. Histologic examination showed particles of irregular shape and variable size (700-1200 microns) localized in the medium/cervical alveolar thirds, with a scanty but persistent foreign body reaction. From the second week on, as the relative volume of bone trabeculae increased, it was seen in close contact with the surface of the implanted material in some regions. Histometric analysis (differential point counting method), used to quantify the healing process in the apical third, showed a small but significant decrease (13%-20%) in new bone formation in the implanted rats. In conclusion, the results show that, in spite of its biocompatible nature, the studied resin hinders the post-extration healing process.

Animals↗