ABSTRACT
ABSTRACT The understanding of bone repair phenomena is a fundamental part of dentistry and maxillofacial surgery. Objective The present study aimed to evaluate the influence of buried magnetic field stimulation on bone repair in rat calvaria after reconstruction with autogenous bone grafts, synthetic powdered hydroxyapatite, or allogeneic cartilage grafts, with or without exposure to magnetic stimulation. Material and Methods Ninety male Wistar rats were divided into 18 groups of five animals each. Critical bone defects were created in the rats’ calvaria and immediately reconstructed with autogenous bone, powdered synthetic hydroxyapatite or allogeneic cartilage. Magnetic implants were also placed in half the animals. Rats were euthanized for analysis at 15, 30, and 60 postoperative days. Histomorphometric analyses of the quantity of bone repair were performed at all times. Results These analyses showed significant group by postoperative time interactions (p=0.008). Among the rats subjected to autogenous bone reconstruction, those exposed to magnetic stimulation had higher bone fill percentages than those without magnetic implants. Results also showed that the quality of bone repair remained higher in the former group as compared to the latter at 60 postoperative days. Conclusions After 60 postoperative days, bone repair was greater in the group treated with autogenous bone grafts and exposed to a magnetic field, and bone repair was most pronounced in animals treated with autogenous bone grafts, followed by those treated with powdered synthetic hydroxyapatite and allogeneic cartilage grafts.
Subject(s)
Animals , Male , Bone Regeneration/physiology , Bone Transplantation/methods , Magnetic Field Therapy/methods , Magnetic Fields , Skull/surgery , Time Factors , Random Allocation , Reproducibility of Results , Treatment Outcome , Rats, Wistar , Durapatite/therapeutic use , Bone Substitutes/therapeutic useABSTRACT
O presente trabalho estudou os acidentes pérfuro-cortantes ocorridos entre alunos, professores e funcionários da Faculdade de Odontologia da Universidade Federal do Rio Grande do Sul. Foram identificados os instrumentos causadores, os locais atingidos, a condição de saúde geral do indivíduo envolvido no acidente pérfuro-cortante e, também, as principais circunstâncias. Os dados analisados foram obtidos a partir do Formulário de Acidente e Incidente de Serviço (FAIS), instituído pela Faculdade com a finalidade de registrar as ocorrências. Foram notificados 25 acidentes pérfuro-cortantes entre os anos de 2004 a 2006, com uma média de 8,33 casos ao ano. Os momentos de atendimento de pacientes e manipulação do instrumental foram os mais citados. As disciplinas ou setores mais relacionados foram a Periodontia e a Odontogeriatria. Os instrumentos mais envolvidos foram curetas periodontais e agulhas anestésicas. Em 24% dos casos os indivíduos não utilizavam nenhum tipo de Equipamento de Proteção Individual (EPI); em 2 casos notificou-se a falta de orientação para atendimento médico ou de enfermagem. Dos 21 alunos envolvidos nos acidentes, 1 não havia feito a vacina contra a Hepatite B e 5 deles notificaram a ausência de vacinação contra o Tétano. Em 3 dos 25 casos estudados os pacientes relataram ser portadores de doenças ou patógenos transmissíveis. Após o estudo, verificou-se que a instituição necessita aperfeiçoar seus métodos de controle de biossegurança.
The present work studied the puncher-cutting accidents occurred among students, professors and employees of the College of Dentistry of the Federal University of Rio Grande do Sul. The dental instruments, the places affected, the condition of general health of the person involved in the puncher-cutting accidents and also the main circumstances were identified. The data analyzed were obtained from the Formulário de Acidente e Incidente de Serviço (FAIS), made by the college with the purpose of register the incidents. Twenty-five puncher-cutting accidents were reported between 2004 to 2006, with an average of 8,33 cases per year. The moments of appointment of patients and manipulation of dental instruments were the most mentioned. The most related subjects or departments were Periodontics and Geriatric Dentistry. The most involved instruments were periodontal curettes and injection dental needles. In 24% of the cases the individuals did not use any kind of Individual Protection Equipment (IPE), in two cases were reported the lack of orientation for medical appointment or nursing. From the 21 students involved in the accidents, one had not made the vaccine against the Hepatitis B and 5 of them reported the absence of vaccination against the Tetanus. From the 25 cases studied only three of the patients said that they have transmitted diseases or pathogens. After study, found that institution needs improve their methods of biosafety control.