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PubMed1989

[A resorption].

Explore the source record for details and available documents.

Adolescent↗
PubMed1999

[A light and scanning electron microscopic study of primary teeth in hypophosphatasia].

OBJECTIVE: To investigate the features of primary tooth structure in hypophosphatasia. METHODS: Three primary teeth from two patients at age of 3 yr-6 month and 4 yr-2 month, who were diagnosed hypophosphatasia. The structural changes of these teeth were examined by light microscopy, polarizing microscopy and scanning electron microscopy. RESULTS: The complete absence of cementum was a prominent feature in all the teeth, three small island-shape cementun areas were found in scanning electron microscopy. A large number of resorptions were found on the root surfaces, particularly near apical portions of roots. The main findings included disturbances of dentin mineralization, hypoplasia or aplasia of root cementum and external resorption of root dentin. CONCLUSION: The hypoplasia or aplasia of root cementum was thought to be the prime etiological factor in the early loss of primary teeth.

Child, Preschool↗
PubMed2006

External invasive resorption in a three-rooted lower first molar.

Several pathoses can be present concurrently in one tooth, and if that tooth has an unusual anatomical variation, the diagnosis and treatment can be further complicated. This case stresses the importance of accurate assessment and diagnosis prior to intervention and their role in identifying cases for referral to a specialist in today's increasingly litigious environment.

Adult↗
PubMed1979

The elective retention of vital roots for alveolar bone preservation: a pilot study.

A technique for retaining alveolar bone beneath complete dentures involving sumergence of vital canine roots below the level of the alveolar bone is reported. Early or late complications occurred in five of the eight roots retained. Radiographic and histologic examination showed the continuance of pulpal vitality and an absence of resorption of roots during the test period. The clinical at the end of 20 months' observation indicated that the procedure may provide a practical means of retaining alveolar bone for some individuals.

Adult↗
PubMed2003

The Periotest in traumatology. Part II. The Periotest as a special test for assessing the periodontal status of teeth in children that have suffered trauma.

The research was carried out on the upper permanent incisor teeth of 101 children aged 8-12 years attending the trauma clinic at the University Dental Hospital, Manchester, UK. The double blind, cross-over study involved Periotest readings being taken by one examiner and traditional special tests being carried out by another examiner. The traditional special tests chosen were mobility testing, percussion sounds and radiographs. The Periotest readings and special tests were then repeated at the child's recall appointment. The results revealed that there was a significant difference (P < 0.001) between the number of abnormalities detected by the Periotest and those detected by the traditional special tests. There was also found to be a significant difference (P < 0.001) in the detection of undesirable sequelae between the Periotest and the traditional special tests.

Chi-Square Distribution↗
PubMed1991

Autotransplantation of teeth in cases with agenesis or traumatic loss of maxillary incisors.

The purpose of this study was to investigate the prognosis of 50 consecutively autotransplanted teeth to the maxillary incisor region. Thirty-five were transplanted in cases of traumatic injuries, eleven in cases of agenesis and four in cases with impaction of maxillary canines. The average follow-up time was 7 years and 6 months (range 4-17 years). The transplants were examined clinically in respect of tooth vitality and radiographically in respect of root canal obliteration, periradicular changes, root formation, and root length. The results show a success rate of 82 per cent. It is concluded that the procedure of tooth transplantation has the advantage of maintaining or restoring alveolar bone volume and gives the opportunity to replace a missing tooth without involvement of neighbouring teeth as prosthetic abutments.

Adolescent↗
PubMed1989

Ossifying fibroma of the mandible and maxilla: review of 18 cases.

A clinical, radiographic, histologic and follow up study of 18 cases of ossifying fibroma involving the mandible and maxilla was performed. Differences in behavior and management according to age, location, radiographic appearance and histopathology were not evident. A wide range of microscopic findings within and between cases was evident, while the radiographic finding consisting of sharp delineation was consistent in all cases. The presence or absence of cementum or cementum-like material and various types of formed elements was likewise of little clinical significance. Finally, a potential source of the neoplastic cell from the periodontal apparatus may help explain the range of histologic findings.

Adolescent↗
PubMed1990

Periodontal repair in dogs: effect of saliva contamination of the root surface.

This study evaluated whether periodontal repair following reconstructive surgery may be compromised by saliva contamination of the root surfaces during the surgical procedure. Circumferential periodontal defects, 5 to 6 mm in vertical dimension, were surgically created in the mandibular premolars in 9 beagle dogs and immediately treated. The denuded root surfaces in left and right jaw quadrants in 4 dogs were treated with either filter sterilized saliva or saline, while in the remaining 5 dogs the root surfaces were treated with unfiltered saliva or saline. The wounds were closed and allowed to heal for 4 weeks. The dogs were sacrificed and tissue blocks prepared for histometric analysis. Results showed no difference between teeth treated with filtered or unfiltered saliva and the saline treated controls. Connective tissue repair to the root surfaces exceeded 70% of the defect height in all experimental groups. Regeneration of cementum and alveolar bone was limited and did not exceed 30% of the defect height. The results indicate that contamination of the root surface by saliva during the surgical procedure does not necessarily compromise connective tissue repair to the root surface.

Alveolar Bone Loss↗