Histological and immunohistochemical analyses of the chronology of healing process after immediate tooth replantation in incisor rat teeth.

Dental tissues have special characteristics, and its regenerative capacity is noteworthy. However, understanding the circumstances that lead to regeneration is challenging. In this study, the chronology of the healing process after immediate replantation of rat incisor teeth was examined by histological and immunohistochemical analyses within a 60-day period. Thirty-six male Wistar rats had their maxillary right incisors extracted and replanted after 15 min in saline storage. The rats were sacrificed immediately 3, 7, 15, 28, and 60 days after replantation. The histological analysis showed rupture of the periodontal ligament and formation of a blood clot, which started being replaced by a connective tissue after 3 days. At 7 days, the gingival mucosa epithelium was reinserted and areas of root resorption could be seen. At 15 days, the periodontal ligament was repaired. At 3 days, the pulp presented an absence of the odontoblast layer, which started being replaced by a connective tissue. This tissue suffered gradual calcification, filling the root canal at 28 and 60 days. The root ends were closed. The immunohistochemical analysis revealed greater expression of OP, OPG, and RANK proteins in the initial periods (0 and 3 days), while TRAP expression predominated at 28 and 60 days (P < 0.05). In conclusion, in delayed tooth replantation, there is great new bone formation activity in the earlier periods of the repair process, while a predominance of bone resorption and remodeling is observed in the more advanced periods.

Efeito educativo de capa de caderno impressa com informações sobre avulsão e reimplante dentários, em estudantes da sexta série do ensino fundamental / Educational effect on sixth grade primary school children after the use of notebook cover, which contained printed information about tooth avulsion and replantation

A avulsão dentária é causa frequente de perda de dente em crianças, adolescentes e adultos jovens. O dente avulsionado deve ser imediatamente reimplantado em seu alvéolo por qualquer pessoa no local do acidente e não apenas pelo cirurgião-dentista. Porém, a falta de conhecimento sobre trauma dentário é significante. Há a necessidade de um programa especial objetivando educar escolares em relação a procedimentos emergenciais nos casos de trauma dentário. Por esta razão, foram produzidos 134 cadernos escolares com capas contendo figuras e textos sobre avulsão e reimplante dentários, que foram distribuídos a 134 estudantes da sexta série do ensino fundamental (grupo experimental). Outro grupo semelhante (grupo controle), com 108 integrantes, recebeu cadernos escolares com capas sem informações relacionadas ao trauma dentário. A pesquisa foi desenvolvida em 2 escolas estaduais de Aaçatuba, SP, Brasil e, para prevenir interferências nos resultados, os grupos não foram desenvolvidos numa mesma escola. Após utilizarem os cadernos por 9 meses em sala de aula, os estudantes dos dois grupos responderam um questionário padronizado pela Teoria de Resposta ao Item, específico para avaliar conhecimento de escolares da sexta série do ensino fundamental de Araçatuba, SP, Brasil. Os Dados foram coletados e processados, usando-se o programa EPIINFO 2010. Setenta e sete por cento dos estudantes tinham idades em torno de 12 anos e 95% relataram praticar algum tipo de atividade física. Os resultados demonstraram que a utilização dos cadernos com as capas relacionadas à avulsão e ao trauma dentários, por 9 meses, proporcionou o conhecimento a esses estudantes sobre a chance do reimplante dentário, após avulsão. Também possibilitou aos escolares associarem o termo técnico trauma dentário com batida violenta no dente. Setenta e sete por cento dos estudantes do grupo experimental escolheram o leite como meio de conservação do dente avulsionado. Na hipótese de estarem frente a um...

Tooth avulsion is a common cause of tooth loss in children, adolescents and young adults. The avulsed tooth should be immediately reimplanted into its socket, a procedure that can be performed by anyone at the accident site and not only by dental surgeons. However, the lack of knowledge about dental trauma is significant. It is necessary to increase the number of programs designed to educate school-aged students about emergency procedures to handle cases of dental trauma. For this reason, the educational effect of a printed notebook cover with information on tooth avulsion and replantation was evaluated in this study, after using them for 9 months by students of the sixth grade in a public school from Araçatuba city, SP , Brazil. To this purpose, 134 of these students (experimental group) received notebooks, whose cover was printed with illustrations and explanatory texts related to tooth avulsion and replantation. Another group received notebooks, whose covers were not related to dental trauma (control group). To avoid interferences in this etudy, each group was developed in a different school. An evaluation of the educational effects on students was performed at the end of the school year, through a specific questionnaire standatized by Item Response Theory (IRT). Data collected was processed using the EPIINFO 2010 program. Seventy-seven percent of the students were aged around 12 years. Ninity-five percent reported they practice some sort of physical activity. The results of this study showed that the use of a printed notebook cover with information on tooth avulsion and replantation during nine months, increased students knowledge about this subject. Students were also able to associate the technical term dental trauma with a violent knock to the tooth. Regarding the storage methods to preserve the avulsed tooth, 77% of students responded that they would keep it in milk, but in the lack of this alternative, 70.3% would pick up it, put it back into its...

Peripheral ossifying fibroma.

The peripheral ossifying fibroma (POF) is a common gingival growth usually arising from the interdental papilla. The anterior maxilla is the most common location of involvement. The etiology and pathogenesis of POF remains unknown. Some investigators consider it a neoplastic process, whereas others argue that it is a reactive process; in either case, the lesion is thought to arise from cells in the periodontal ligament. Trauma or local irritants, such as dental plaque, calculus, microorganisms, masticatory force, ill-fitting dentures, and poor quality restorations, have been implicated in the etiology of POF. The recommended treatment is the excisional biopsy; however, it can leave a defect if the procedure is not followed by a subepithelial connective tissue graft. The main objective of this article was to present a clinical case of excisional biopsy of a POF followed by a subepithelial connective tissue graft to correct the defect caused by the biopsy. The biopsy defect was satisfactorily repaired, and the lesion has not recurred after 6 years of follow-up.

Aspectos psicossociais na assistência odontológica ambulatorial ao portador de deficiência mental / Psychosocial aspects in dental care for handicapped

Os autores ressaltam a importância do Serviço Social e da sociologia na distinção e solução de problemas psicossociais que possam interferir no processo de colaboração do paciente portador de deficiência mental à assistência odontológica. Mostram que a efetividade desta assistência depende do trabalho integrado de equipe multiprofissional. Estratégias e associações de técnicas de controle psicológico do comportamento são sugeridas como recursos indispensáveis à adaptação desse paciente à situação odontológica ambulatorial

Síndrome de Klippel-Trenaunay relato de um caso clínico / Klippel-Trenaunay syndrome case report

A síndrome de Klippel-Trenaunay é uma tríade de anomalias congênitas caracterizada por nevo vascular, veias varicosas e hipertrofia óssea e dos tecidos moles. Os autores realizaram uma revista de literatura, abordando aspectos gerais e odontológicos desta síndrome e relataram o caso de uma criança de 9 anos de idade apresentando hemi-hipertrofia facial, má posição individual de dentes e má-oclusão. Os achados bucais são suficientemente frequentes para justificar o domínio do conhecimento global desta síndrome por cirurgiões-dentistas, alertando-os às possíveis complicações durante procedimentos odontológicos