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Search Results: 1 - 10 of 188812 matches for " Henrique Duque de Miranda Chaves; Barbosa "
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Análisis Histológico del Proceso de Reparación en Defectos óseos: Reconocimiento de Defectos Críticos Histological Analyses of Osseous Repair Defects: Recognized of Critic Defects
Henrique Duque de Miranda Chaves Netto,Sergio Olate,Maria das Gra?as Alfonso Miranda Chaves,José Ricardo de Albergaria Barbosa
International Journal of Morphology , 2009,
Abstract: Los procedimientos quirúrgicos que envuelven la rehabilitación de la región maxilofacial requieren frecuentemente el uso de injertos para la reconstrucción de de deformidades congénitas o adquiridas. De esta forma, defectos óseos pueden clasificarse como críticos o no críticos. En esta investigación fueron utilizados 6 canes machos realizando 2 defectos bicorticales de 8mm de diámetro en la calota craneal de cada animal; el relleno de las cavidades se realizo como grupo 1 con coagulo sanguíneo y grupo 2 con hueso autógeno en partículas. A través de un an análisis histológico descriptivo se observo en el periodo de tres semanas de sacrificio que el grupo 2 fue el único en presentar regiones de aposición de nuevo tejido óseo. En el periodo de 6 semanas el grupo 2 presento partículas de hueso autógeno utilizadas para el relleno en estado de reabsorción avanzada en ausencia de los bordes nítidos entre el defecto y el hueso preexistente. De este modo se concluye que el método que auxilie en el proceso de reparación tecidual como los injertos óseos autógenos, están indicados en la recuperación de defectos críticos, iguales o mayores que 8mm. Surgical procedures involving maxillofacial region frequently require bone grafting to reconstruct the congenital or acquired defects, as well to aesthetic. The bone defect can critical or non-critical. To perform the present studied were used 8 dogs, males. It was performed 2 bicortical defects having 8 mm of diameter on the calvarium of each animal. The cavities were filled up thru the following way: group 1 - blood clot, group 2 - particulate autogenous bone graft. Thru the descriptive radiologic and histological analysis, it was observed on 3 weeks period that The group 2 was the only one that presented new bone apposition. On the 6 weeks sacrifice period. The group 2 was the only one that showed advanced resorption stage of the bone grafts particles used for fulfillment being, also the only one that showed periphery of the defects without limit. On this way, it may be conclude that bone defects over 8mm can be considered Critical, being necessary some method to help tissue repair, as well as, autogenous bone grafts works well when helping this regeneration process, being indicated to assist bone repair like this performed on this study.
Early Osseous Tissue Formation Associated to Submerged and Non-Submerged Dental Implants: A Histomorphometric Animal Study
Olate,Sergio; Chaves Netto,Henrique Duque de Miranda; Mazzonetto,Renato; Albergaria-Barbosa,Jose Ricardo de;
International Journal of Morphology , 2012, DOI: 10.4067/S0717-95022012000100023
Abstract: the purpose of this research was to compare the bone formation around submerged and non-submerged implants installed in a mandible of dog. seven beagle dogs were used in this protocol; initially, was performed extraction of posterior teeth of mandible and after 3 month healing were installed two dental implants with surface treatment (subtraction of titanium via acidification) in each hemimandible. a transmucosal healing screw of 7 mm without oclusal contact was installed at the anterior implant as a model of non-submerged implant; in the posterior implant were installed a cover screw, using the submerged technique. after six weeks of healing, histomorphometric analysis of osseous tissue between the threads was performed. was analyzed the implant unit as well as the cervical, meddle and apical region of implant. student t test with 5% significance was used. the non-submerged implant model showed more bone formation than submerged implant without statistically significance (p=0.106); for regional analyses, cervical area shows more osseous formation than middle and apical areas. the regional analyses did not present statistical difference between areas for comparative analysis of submerged and non-submerged implant model. non-submerged implant model it's not an obstacle for osseous formation.
Early Osseous Tissue Formation Associated to Submerged and Non-Submerged Dental Implants: A Histomorphometric Animal Study Formación Temprana de Tejido óseo Asociado a Implantes Dentales Sumergidos y no Sumergidos: Un Estudio Histomorfométrico Animal
Sergio Olate,Henrique Duque de Miranda Chaves Netto,Renato Mazzonetto,Jose Ricardo de Albergaria-Barbosa
International Journal of Morphology , 2012,
Abstract: The purpose of this research was to compare the bone formation around submerged and non-submerged implants installed in a mandible of dog. Seven beagle dogs were used in this protocol; initially, was performed extraction of posterior teeth of mandible and after 3 month healing were installed two dental implants with surface treatment (subtraction of titanium via acidification) in each hemimandible. A transmucosal healing screw of 7 mm without oclusal contact was installed at the anterior implant as a model of non-submerged implant; in the posterior implant were installed a cover screw, using the submerged technique. After six weeks of healing, histomorphometric analysis of osseous tissue between the threads was performed. Was analyzed the implant unit as well as the cervical, meddle and apical region of implant. Student t test with 5% significance was used. The non-submerged implant model showed more bone formation than submerged implant without statistically significance (p=0.106); for regional analyses, cervical area shows more osseous formation than middle and apical areas. The regional analyses did not present statistical difference between areas for comparative analysis of submerged and non-submerged implant model. Non-submerged implant model it's not an obstacle for osseous formation. El objetivo de esta investigación fue comparar la formación ósea alrededor de implantes dentales sumergidos y no sumergidos instalados en mandíbula de perro. Siete perros Beagle fueron utilizados en este protocolo; inicialmente fueron realizadas las exodoncias de dientes posteriores de mandíbula y luego de 3 meses de recuperación fueron instalados dos implantes dentales con tratamiento de superficie en cada hemimandíbula (substracción de titanio vía acidificación). En el implante anterior fue instalado también un conector transmucoso de 7 mm sin contacto oclusal y en el implante posterior fue instalado el tornillo de cierre. Luego de 6 semanas de recuperación, se realizó un análisis histomorfométrico del tejido óseo presente entre las roscas. Se analizó el implante como unidad así como también sus sectores cervical, medio y apical. Se utilizó la prueba estadística t de student con 5% de significancia estadística. El implante no sumergido presentó mayor formación ósea sin diferencias estadísticamente significativa (p=0.106); en los análisis regionales, el área cervical presentó mayor formación ósea que las áreas medianas y apicales. El análisis regional no presentó diferencias estadísticamente significativas entre ambos tipos de implante. El modelo de implante no sume
Análisis Descriptivo de la Reparación ósea Asociada a Implantes Dentales Endóseos Instalados en Perros con Técnica Sumergida en Dos Períodos de Evaluación
Olate,Sergio; Chaves-Netto,Henrique Duque de Miranda; Jaimes,Miguel; Mazzonetto,Renato; Albergaria-Barbosa,Jose Ricardo de;
International Journal of Morphology , 2009, DOI: 10.4067/S0717-95022009000200023
Abstract: osseointegrated implants are a part of clinical practice in different areas of the aesthetic and functional human rehabilitation where dentistry is not an exception; being like that, dental implants are a responses to great necessity of patient with partial or total dental lost. exist an important and crescent research in implantology, being very important to recognize the histological characteristic of the osseous repair when dental implant are installed. the aim of this research was to recognize the histological descriptive characteristic of the osseous repair in two evaluation period. the experimental model in this research was five dogs submitted to dental extraction of mandibular bilateral bicuspid. after three month were installed bilateral implants with two implants design and different load protocols. the animals' sacrifices were realized three and six weeks after implants installation. the histological evaluation was realized in a tissue of implant with submerged techniques. was observed osseous repair characteristic for two evaluation period. for three weeks period was observed mineralized tissue in contact with implant and non mineralized connective tissue in increase from superior to inferior areas. reparation areas were related to adjacent angiogenic phenomena. for sex weeks period, was observed a major osseous formation, change connective tissue for mineralized tissue. was observed too matures osseous tissue with well formed havers channel. we conclude that exist a biological sequence of osseous repair present for a two evaluation period, where in a sex weeks is observed osseous tissue with good definition, theoretically capable for stress support.
Análisis Histológico del Proceso de Reparación en Defectos óseos: Reconocimiento de Defectos Críticos
Chaves Netto,Henrique Duque de Miranda; Olate,Sergio; Chaves,Maria das Gra?as Alfonso Miranda; Barbosa,José Ricardo de Albergaria; Mazzonetto,Renato;
International Journal of Morphology , 2009, DOI: 10.4067/S0717-95022009000400027
Abstract: surgical procedures involving maxillofacial region frequently require bone grafting to reconstruct the congenital or acquired defects, as well to aesthetic. the bone defect can critical or non-critical. to perform the present studied were used 8 dogs, males. it was performed 2 bicortical defects having 8 mm of diameter on the calvarium of each animal. the cavities were filled up thru the following way: group 1 - blood clot, group 2 - particulate autogenous bone graft. thru the descriptive radiologic and histological analysis, it was observed on 3 weeks period that the group 2 was the only one that presented new bone apposition. on the 6 weeks sacrifice period. the group 2 was the only one that showed advanced resorption stage of the bone grafts particles used for fulfillment being, also the only one that showed periphery of the defects without limit. on this way, it may be conclude that bone defects over 8mm can be considered critical, being necessary some method to help tissue repair, as well as, autogenous bone grafts works well when helping this regeneration process, being indicated to assist bone repair like this performed on this study.
Bifosfonatos y Osteonecrosis de los Maxilares: Consideraciones Sobre su Tratamiento
Jaimes,Miguel; Chaves Netto,Henrique Duque de Miranda; Olate,Sergio; Chaves,Maria das Gra?as Alfonso Miranda; Barbosa,José Ricardo de Albergaria;
International Journal of Morphology , 2008, DOI: 10.4067/S0717-95022008000300028
Abstract: bisphosphonates are strong osteoclastic inhibitor activities, being these drugs usually for treatment of múltiple myeloma and bone metastases of solid tumors like breast cáncer. the osteonecrosis of the maxillary bones was first described in 2003. the relation of these medicines and maxillary bone osteonecrosis still uncertain. the incidence of this bone necrosis was very low before biphosphonates using. nowadays this complication reach at least 10% of patients in these therapy using. the present work mean to alert for possible complication in biphosphonates using patients, thru a literature review and a clinical case presentation.
Craniofacial Morphometry for Craniofacial Implant
Olate,Sergio; de Moraes,Paulo Hemerson; Caria,Paulo Henrique Ferreira; Netto,Henrique Duque de Miranda Chaves; Barbosa,José Ricardo de Albergaria;
International Journal of Morphology , 2012, DOI: 10.4067/S0717-95022012000300063
Abstract: craniofacial implants are being increasingly used to treat patients with sequelae of oncological resections, trauma, and congenital deficiencies, among other issues. the aim of this investigation was to establish the minimum and maximum bone dimensions present in the most used places for the insertion of craniofacial implants. a descriptive study was designed analyzing 40 human skulls using cone-beam computed tomography; in the volumetric reconstruction the points most often used in clinical investigations for the insertion of implants were selected, representing the orbital, perinasal, zygomatic bone and periauricular regions, measuring the distance between the cortical bones on the sagittal, axial and coronal planes; comparisons between gender and with other investigations with a similar aim were also made. in the supraorbital area, values of 7.92±1.82 mm were found and in the lateral area values of 7.54±0.98 mm, allowing the placement of implants 5 or 6 mm in length. in the area of the zygomatic bone, dimensions of 10.4±2.35 mm were obtained, allowing the placement of implants 8 mm in length. in the periauricular area values were obtained of 2.93±0.55 mm in the superior region and 3.1±0.7 mm in the inferior region, whereas in the perinasal area implants 4 mm in length can be placed. we concluded that the craniomaxillofacial bone structure presents acceptable widths for the installation of implants; the periauricular region presents lower dimensions, with the possibility of intracranial communication in areas above the external auditory meatus.
El área Cervical de Implantes Dentales Presenta Mayor Formación ósea que el área Apical en Diferentes Condiciones de Dise?o y Carga: Resultados Preliminares
Olate,Sergio; Chaves Netto,Henrique Duque de Miranda; Mu?ante-Cárdenas,José Luis; Mazzonetto,Renato; Albergaria-Barbosa,José Ricardo de;
International Journal of Morphology , 2009, DOI: 10.4067/S0717-95022009000200016
Abstract: dental implants have evolved of substantial form in the last 40 years; however, doubt about osseous repair characteristic are maintained because new design and surgical method are applied. the aim of this research is show the mineralized tissue in different areas of the implant. was done a study based to a immediate load model applied in 7 male dogs mandible. was realized the dental extractions of de bilateral mandibles bicusp and after to 3 month of recuperations was installed two bilaterally implants, been conical and cylindered shape. after of two sacrifices period was realized a histomorphometric analysis in the selection cut. the results are present with perceptual form, establishing cervical, meddle and apical comparison. conical implants with immediaterestoration model were present more osseous formations in all evaluated level. for all conditions of work, cervical area presented more mineralized tissue than apical area. we conclude that immediately restoration model it is not an obstacle for the installation of the appropriate sequence for the osseous reparation and that different factors have been associated to the more osseous formation in the cervical area of the dental implants.
Manipulación del Plano Oclusal en Cirugía Ortognática: Consideraciones Faciales
Olate,Sergio; Chaves Netto,Henrique Duque de Miranda;
International journal of odontostomatology , 2010, DOI: 10.4067/S0718-381X2010000100005
Abstract: occlusal plane has been an important element in orthognatic surgery during these last 20 years. the primary investigations have shown that facial characteristics are highly associated to mandibular positioning. thus, occlusal plane rotation allows an acclusal plan different from the initial one, even as vertical and anterior-posterior positioning more favorable en endings of aesthetic. besides the studies carried through to measure y to characterize these movements are limited, they are favorable. they have demonstrated that occlusal plane rotation versatile y stable, being useful en different types of facial deformities. the meaning of this work are identify the more important characteristic about occlusal plane rotation as well analyze the most cited articles in the literature.
Bifosfonatos y Osteonecrosis de los Maxilares: Consideraciones Sobre su Tratamiento Biphosphonate and Jaws Osteonecrosis: Considerations About of Treatment
Miguel Jaimes,Henrique Duque de Miranda Chaves Netto,Sergio Olate,Maria das Gra?as Alfonso Miranda Chaves
International Journal of Morphology , 2008,
Abstract: Los bifosfonatos son potentes inhibidores de los osteoclastos, son drogas usadas principalmente para el tratamiento de mieloma múltiple y en metástasis óseas de tumores sólidos como el cáncer de mama. En el a o 2003 fue relatado el primer caso de osteonecrosis de los maxilares (ONM) asociado al uso de bifosfonatos, sin embargo aun no se ha establecido una relación causa efecto de estas drogas sobre la ONM. La incidencia en tiempos anteriores en relación al uso de bifosfonatos era muy baja, siendo que hoy día alcanza 10% o más en las patologías mencionadas tratadas con estas drogas. Este artículo tiene por objetivo alertar sobre una posible complicación en pacientes que hacen uso de bifosfonatos, a través de la revisión de la literatura y la presentación de un caso clínico. Bisphosphonates are strong osteoclastic inhibitor activities, being these drugs usually for treatment of múltiple myeloma and bone metastases of solid tumors like breast cáncer. The osteonecrosis of the maxillary bones was first described in 2003. The relation of these medicines and maxillary bone osteonecrosis still uncertain. The incidence of this bone necrosis was very low before biphosphonates using. Nowadays this complication reach at least 10% of patients in these therapy using. The present work mean to alert for possible complication in biphosphonates using patients, thru a literature review and a clinical case presentation.
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