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At least 793 records · Page 44Linked to original sources
PubMed2005

Orthodontic treatment of a traumatically intruded tooth with ankylosis by traction after surgical luxation.

This report presents the treatment of a patient with anterior crossbite and displacement of ankylosed maxillary and mandibular right lateral incisors. The maxillary lateral incisor, which was traumatically intruded, was successfully treated with 2 surgical luxations followed by orthodontic traction. The mandibular lateral incisor, which was avulsed and replanted, experienced replacement root resorption during orthodontic treatment and was ultimately extracted. Two years after active orthodontic treatment, the occlusal results were considered satisfactory.

Cephalometry↗
PubMed2003

Reduction of osteoclasts in a critical embryonic period is essential for inhibition of mouse tooth eruption.

Alveolar bone resorption by osteoclasts is essential for tooth eruption. Osteoclast-deficient Csfm(op) homozygous (op/op) mice, which lack functional macrophage colony-stimulating factor (M-CSF), suffer from osteopetrosis and completely lack tooth eruption. Although osteoclasts appear, and osteopetrosis is cured with age in op/op mice, tooth eruption is never seen. This fact suggests that there is a critical period when osteoclasts are required for tooth eruption. In this study, to detect the critical period, we administered an antagonistic antibody directed against c-Fms, a receptor for M-CSF, to inbred C57BL/6 mice for various periods. Administration of this antibody decreased tartrate-resistant acid phosphatase-positive (TRAP) osteoclasts, and incisor eruption was completely inhibited by continual administration of this antibody from embryonic day 15.5 (E15.5) until postnatal day 12.5 (D12.5). A 1-day delay of this administration abolished the inhibition of incisor eruption. The number of TRAP-positive osteoclasts was significantly reduced between E16.5 and E18.5 in the mice treated with antibody from E15.5 compared with those treated from E16.5. These results indicate that this period, during which the number of osteoclasts decreases significantly, is critical for inhibiting incisor eruption in C57BL/6 mice.

Acid Phosphatase↗
PubMedDate not supplied

[Histologic changes in human periodontal tissue after transplantation of teeth with completely formed roots].

Authors present the histological evolution of the periodontal tissues after complete-root teeth transplantation in human. They point out that there is a great distinction between the histological and clinical results. It is difficult to obtain the neoformation of a normal periodontal ligament. In spite of the histological failure, they obtained a good clinical result: there fore the complete-root tooth transplantation must be considered an acceptable surgical procedure.

Adolescent↗
PubMed2001

Bacteria on the apical root surfaces of untreated teeth with periradicular lesions: a scanning electron microscopy study.

AIM: The purpose of this study was to examine the presence of bacteria on the apical root surfaces of untreated teeth associated with chronic periradicular lesions. METHODOLOGY: Twenty-seven extracted teeth with extensive carious lesions, radiolucent lesions of varying sizes and attached periradicular lesions after extraction, were selected for study. Following fixation, lesions were removed and the apical 5-mm portion of each root was sectioned. Root tips were dehydrated, sputter-coated with gold, and then examined for the occurrence of bacteria on the apical root surfaces using a scanning electron microscope. RESULTS: Bacterial cells were usually observed close to the apical foramen, but restricted to the root canal. Morphologically, these bacteria consisted of cocci and rods. A dense bacterial aggregate composed mainly of rods was observed within the root canal and surrounding the apical foramen of one specimen. Beyond the apical foramen, other bacterial morphological types were recognized, including coaggregations of cocci and filaments, characterizing a fully developed 'corn cob'. CONCLUSIONS: Extraradicular bacteria were observed in one tooth out of 27 (4% of the cases).

Bacteria↗
PubMed1998

Immediate placement of an endosseous root-form implant in an HIV-positive patient: report of a case.

Use of combination antiretroviral therapy regimens, including a protease inhibitor, has greatly improved the survival and systemic health of HIV-positive patients. Due to the esthetic requirements of the patient in this case report, placement of an endosseous implant into a fresh extraction site, restored with a single crown, was the treatment of choice. The implant and restoration are functioning well 18 months after placement of the fixture.

Adult↗
PubMed1992

Infantile osteopetrosis: a case report on dental findings.

In this paper we have described the case of a 7-yr-old Moroccan osteopetrotic boy, who had received a bone marrow transplant (BMT). He was transplanted from his older brother and, despite immunosuppressive therapy, developed chronic graft-versus-host disease and was placed on corticotherapy. Seven months after the bone marrow transplant, graft versus host disease (GVHD) was stabilized, but corticotherapy had inhibited growth. There was evidence of normalizing bone, his hearing was better but he had not recovered vision. Dental findings before the bone marrow transplant revealed some missing teeth, failure of teeth to erupt and decayed teeth but no enamel hypoplasia. The patient had developed one carious lesion on one unerupted tooth: bacteria seem to have found a way through the gubernaculum dentale. The scanning electronmicrographs showed decayed tooth and tissues fitted into each other. Since the bone marrow transplant, no tooth has erupted. We think that, in this case, failure of tooth eruption would be the sign of osteopetrosis.

Bone Marrow Transplantation↗
PubMed1980

Effect of extraction in the late mixed dentition on the eruption of the first premolar in Macaca nemestrina.

The effect of deciduous tooth extraction in the late mixed dentition on the eruption of succedaneous teeth was studied in ten Macaca nemestrina. Nineteen deciduous teeth were extracted: nine maxillary and ten mandibular left deciduous first molars. Regardless of sex, arch, chronologic or dental age, all first premolars on the experimental side erupted before those on the control side and this pattern was statistically significant. Extraction of deciduous molars in the late mixed dentition is seen to accelerate eruption of first premolars in Macaca nemestrina. This could be the result of eliminating the need for deciduous tooth root resorption during the normal process of eruption.

Age Factors↗
PubMed1985

Evaluation of hydroxylapatite root implants in baboons.

To determine if there is a need for close conformation of a hydroxylapatite implant to the root socket for successful prevention of alveolar ridge resorption after tooth extraction, second premolars and lateral incisors of six mature baboons were extracted bilaterally, and custom-fitted root replicas or half-length, plug-shaped forms of hydroxylapatite were implanted in the fresh sockets. Results showed that precise fit, as achieved by a custom-fitted implant, was not necessary for success. All implants were completely accepted, with evidence of new bone formation continuing for up to six months, the duration of the study. No resorption of the alveolar ridge was observed by gross or microscopic examination.

Alveolar Process↗