Union between deciduous and permanent as intrusive luxation sequelae: A case report.

Traumatic dental injuries (TDI) are common in children due learning to walk and lack of balance that leads to falls. Luxation is the trauma that occurs most frequently in the deciduous, being that the intrusive and the avulsive are the ones that cause more damage to the permanent successors. The potential to cause disturbances to the developing permanent germ is high due to anatomical proximity and depends on age, direction of intrusion, severity and treatment. The consequences to the permanent range from hypocalcifications of enamel to retention of the permanent germ. In this case, the developmental disturbance of the tooth 21 presenting with acute dentoalveolar abscess was a result of a three-degree intrusive luxation of the deciduous predecessor. The tooth 61 was misdiagnosed initially as avulsion, but it was a total intrusion as uncovered after a radiographic examination that showed an image suggestive of the presence of the deciduous tooth. The deciduous was extracted along with his permanent successor through outpatient procedure under antibiotic coverage and local anesthesia. The macro and microscopic analysis of the piece evidenced the presence of elements 21 and 61 closely united, as well as alterations provoked in both. There was remission of the infectious process and after 7 days it was verified the correct healing of the surgical wound. The radical outcome of this case emphasizes the relevance of appropriate clinical support as soon as possible in all TDI.

Peripheral odontogenic fibroma in a child with Ellis-van Creveld syndrome: Case report.

INTRODUCTION: Ellis-van Creveld (EVC) syndrome is an autosomal recessive disorder predominantly characterized by a disproportionate dwarfism, ectodermal dysplasia, postaxial polydactyly, and congenital heart malformations and pulmonary hypoplasia. OBJECTIVE: In this article, we hereby present a case of a 6-year-old Brazilian boy with EVC syndrome who presented a rare oral lesion as well as a remarkable number of classical and uncommon oral and dental features. CASE REPORT: Clinical and radiographic examination revealed multiple enamel hypoplasia, teeth agenesis, conical teeth, lower canine rotation, bilateral posterior crossbite, taurodontism of deciduous and permanent molars and delayed tooth eruption, dental caries, and absent vestibular sulcus. Additionally, a whitish lobulated nodule located in the alveolar ridge in the anterior region of the mandible was noted. Anatomopathological examination was compatible with the diagnosis of peripheral odontogenic fibroma (POF). In a 10-month clinical follow-up, no signs of recurrence were observed. CONCLUSION: In view of the characteristic oral findings of EVC syndrome and the potential for recurrence of POF, the pediatric dentist plays an essential role in clinical follow-up, planning and preventive, and rehabilitative treatment.

Immediate reimplantation of primary teeth: a histological study in dogs.

Reimplantation of primary teeth has been the subject of various clinical and histological studies, but very little is known about the effect of this treatment on primary teeth. The aim of the present study was to histologically evaluate the biological response of dog primary teeth after immediate reimplantation. Twelve dogs were divided into two groups according to postoperative time: 1 week and 3 weeks. Twenty-one upper and lower intermediate incisors were extracted and submitted to endodontic treatment, reimplantation and splinting. The 21 homologous teeth not submitted to treatment served as controls. The animals were killed after the respective experimental periods, and the obtained specimens were processed for histological analysis. Most dogs of the 1-week group exhibited the following alterations: gingival epithelium was inserted in the cemento-enamel junction, with a small number of chronic inflammatory cells being observed in the gingival corium; the periodontal ligament was partially reestablished, with a more expressive chronic inflammatory infiltrate being observed in the apical third; small root resorption was observed on the palatine/lingual side in the apical third. In contrast, in 3-week animals, gingival epithelial insertion was predominantly absent on the buccal side, and a moderate chronic inflammatory infiltrate was present; the periodontal ligament generally showed no bone-cementum reinsertion especially on the palatine/lingual side, with an expressive inflammatory infiltrate in the apical region, and large root resorption was mainly observed on the palatine and lingual sides. In conclusion, reimplantation causes histological alterations in the tooth and its supporting periodontal structures that suggest the impossibility of its maintenance.

Reimplante imediato de dentes decíduos: estudo histológico em cäes / Immediate replantation of primary teeth: histologic study in dogs

O reimplante de dentes permanentes tem sido objeto de vários estudos clínicos e histológicos, mas muito pouco se sabe sobre o efeito deste tratamento nos dentes decíduos. O propósito do presente estudo foi avaliar, histologicamente, a resposta biológica dos dentes decíduos de cäes, após serem reimplantados de forma imediata. Foram utilizados 12 cäes divididos em 2 grupos de acordo com o período experimental de 1 e 3 semanas. Em 21 incisivos intermédios superiores e inferiores realizou-se a extraçäo, a endodontia, o reimplante e a esplintagem. Os 21 dentes homólogos, sem tratamento, serviram como controle. Decorridos os períodos experimentais, os animais foram sacrificados, e as peças obtidas, processadas para análise histológica. Verificou-se na maioria dos cäes de uma semana que: o epitélio gengival estava inserido na junçäo amelocementária com pequeno número de células inflamatórias crônicas no cório gengival; o ligamento periodontal mostrou-se parcialmente restabelecido com infiltrado inflamatório crônico mais expressivo no 1/3 apical; pequenas reabsorçöes radiculares foram observadas no lado palatino/lingual no 1/3 apical. Já nos cäes de três semanas observou-se: ausência de inserçäo epitelial gengival, predominantemente no lado vestibular, com moderado infiltrado inflamatório crônico; o ligamento periodontal, no geral, mostrou-se com ausência de reinserçäo ósseo-cementária principalmente no lado palatino-lingual, com infiltrado inflamatório expressivo na regiäo apical e também, grandes reabsorçöes radiculares foram encontradas predominantemente nos lados palatino e lingual. Com a análise dos resultados obtidos da metodologia empregada, concluiu-se que o reimplante provocou alteraçöes histológicas, tanto no dente quanto em suas estruturas periodontais, sugestivas de impossibilidade de sua manutençäo