RESUMO
Perforation of the Schneiderian membrane constitutes a major intraoperative complication of maxillary sinus floor elevation with graft materials, but postoperative perforation of the sinus membrane is very rare. This case report demonstrates that conservative treatment involving drainage and the administration of systemic antibiotics can be used to successfully treat postoperative sinus membrane perforation with infection of the graft material.
Assuntos
Seio Maxilar/patologia , Mucosa Nasal/patologia , Complicações Pós-Operatórias , Levantamento do Assoalho do Seio Maxilar/efeitos adversos , Infecção da Ferida Cirúrgica/etiologia , Adulto , Autoenxertos/transplante , Substitutos Ósseos/uso terapêutico , Transplante Ósseo/métodos , Implantação Dentária Endóssea/métodos , Implantes Dentários , Seguimentos , Humanos , Masculino , Fístula Bucal/etiologia , Fístula do Sistema Respiratório/etiologia , Irrigação Terapêutica/métodosRESUMO
PURPOSE: The purposes of the present study were to evaluate the effects of frequent applications of low-level laser therapy (LLLT) on corticotomy-assisted tooth movement in a beagle dog model and to compare the effects in the mandible and maxilla. MATERIALS AND METHODS: In 4 male beagles, the maxillary and mandibular second premolars were extracted. The third premolars were corticotomized and then protracted from the canines with a continuous force of 200 g. Daily LLLT (using an aluminum gallium indium phosphide [AlGaInP] diode) was applied at the buccal mucosa of the corticotomized premolars on 1 side only. The tooth movement was measured for 8 weeks. Fluorochromes were injected intravenously at the start of the experiment (T0) and after 2 (T2), 4 (T4), and 8 (T8) weeks to evaluate new bone formation on the tension sides. Histomorphometric and immunohistologic evaluations were performed. RESULTS: In the mandible, the movement of the corticotomized premolars in the LLLT plus corticotomy group was less than that in the corticotomy-only group, although the difference was not statistically significant. In the maxilla, no significant differences between the 2 groups were found. Osteoclastic and proliferating cell activities and the amount of new bone formation were greater in the mandibular LLLT plus corticotomy group than in the corticotomy-only group. CONCLUSIONS: The frequent application of LLLT showed no significant effect on the corticotomized tooth movement.
Assuntos
Terapia com Luz de Baixa Intensidade/métodos , Mandíbula/cirurgia , Técnicas de Movimentação Dentária/métodos , Fosfatase Ácida/análise , Processo Alveolar/efeitos da radiação , Processo Alveolar/cirurgia , Animais , Antraquinonas , Dente Pré-Molar/efeitos da radiação , Dente Pré-Molar/cirurgia , Reabsorção Óssea/classificação , Proliferação de Células/efeitos da radiação , Cães , Fluoresceínas , Corantes Fluorescentes , Isoenzimas/análise , Lasers Semicondutores/uso terapêutico , Masculino , Mandíbula/efeitos da radiação , Maxila/efeitos da radiação , Maxila/cirurgia , Modelos Animais , Fios Ortodônticos , Osteoclastos/patologia , Osteogênese/fisiologia , Osteogênese/efeitos da radiação , Projetos Piloto , Antígeno Nuclear de Célula em Proliferação/análise , Reabsorção da Raiz/classificação , Fosfatase Ácida Resistente a Tartarato , Tetraciclina , Fatores de Tempo , Técnicas de Movimentação Dentária/instrumentaçãoRESUMO
OBJECTIVES: To investigate the relationship between two-dimensional (2D) and three-dimensional (3D) bone imaging parameters. STUDY DESIGN: Bone specimens were obtained from the mandibles of five male pigs weighing around 110 kg each. A total of 111 samples were measured two-dimensionally with using solid state digital intraoral radiography. Of these 111 samples, 43 were selected for 3D analysis and measured by microcomputed tomography. Through destructive mechanical testing, strength parameters were obtained. RESULTS: Correlations between the 2D and 3D parameters were rare; however, both 2D and 3D parameters separately showed significant correlations with strength. Multiple linear regression analyses using both 2D and 3D parameters together showed greater predictability than those using only 2D or only 3D parameters. CONCLUSION: Architectural parameters in 2D and 3D independently affect trabecular strength; the combination of the two can be used to improve bone strength predictability.
Assuntos
Mandíbula/anatomia & histologia , Mandíbula/fisiologia , Animais , Densidade Óssea , Análise do Estresse Dentário , Elasticidade , Imageamento Tridimensional , Modelos Lineares , Masculino , Mandíbula/diagnóstico por imagem , Radiografia Dentária Digital , Estresse Mecânico , Suínos , Tomografia Computadorizada por Raios XRESUMO
OBJECTIVE: This study compared the difference between 3 intraoral radiographic techniques on digital subtraction radiography (DSR) in vivo that are commonly used in a clinical setting. STUDY DESIGN: We evaluated and statistically analyzed the errors in the DSR image in 6 regions with 3 radiographic techniques: paralleling technique with a bite block attached to XCP, paralleling technique using XCP, and bisecting-angle technique. RESULTS: The amount of error using the bisecting-angle technique was too large for DSR, compared to that of the paralleling technique with a bite block attached to XCP. In the mandibular anterior region, the paralleling technique using XCP was not different from paralleling technique with a bite block attached to XCP. The lowest degree of error was present in the anterior region whereas the highest was present in the molar region. CONCLUSION: Bisecting-angle technique should be avoided, and paralleling technique using XCP can be used in the mandibular anterior region for DSR.
