9 results on '"Hernando Valentim da Rocha-Júnior"'
Search Results
2. Tomographic Evaluation of Mandibular Thickness on Premolar and Molar Regions Related to Monocortical Screws
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Guto Fidalgo, Jonathan Ribeiro, Hernando Valentim da Rocha Júnior, Luiz Fernando Magacho, Manuella Zanela, Charles Marin, and Nicolas Homsi
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Orthodontics ,Molar ,business.industry ,Statistical difference ,Mandible ,Dentistry ,Surgical planning ,Article ,Standard deviation ,medicine.anatomical_structure ,stomatognathic system ,Otorhinolaryngology ,Premolar ,Medicine ,Surgery ,Tomography ,Oral Surgery ,business ,Fixation (histology) - Abstract
The aim of this study was to measure the thickness of the mandible from the external cortical plate to the teeth roots on premolar and molar regions using CT scan to determine the safety margin for the application of monocortical screws for internal rigid fixation. Thirty-one patients underwent CT-scan imaging for surgical planning. The images were used to measure bilaterally the distance from the external cortex of the mandible to the roots of teeth on premolar and molar region by means of Dental Slice software (Bioparts Prototipagem Biomedica, Brasília, DF, Brazil). Mean, median, standard deviation, one-way ANOVA and post hoc Tukey's test were used for statistical analysis. No statistical differences for thickness were found between right and left side ( p = 0.1652). The mean thickness for the left side was 4.17 ± 1.68 mm and for right side 3.93 ± 1.49 mm. Increase in mandibular thickness from anterior to posterior regions in both sides was observed and statistical difference was found among the different groups according to the measured region ( p < 0.05). The present results can predict the safety zone for the use of monocortical screws in the mandible, but the use of CT scan is imperative and individual analysis is desired owing to anatomical variations. Further studies with larger samples are necessary to confirm these data and should include other anatomic structures, different regions of mandible/maxilla, as well as other ethnic groups.
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- 2016
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- View/download PDF
3. Tratamento cirúrgico conservador para tumor de Warthin: relato de caso
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Breno dos Reis Fernandes, Bruno Coelho Mendes, Hernando Valentim da Rocha Júnior, Jonathan Ribeiro da Silva, Renato Machinez Machado, Gabriel Mulinari-Santos, Henrique Hadad, and Roberta Okamoto
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General Medicine - Abstract
O tumor de Warthin é a segunda lesão mais comum da glândula parótida, sendo raro em qualquer outra glândula salivar. Possui comportamento benigno, com crescimento lento e indolor. Neste artigo é relatado um caso clínico onde o tumor apresentou evolução de um ano, sem sintomatologia associada, gerando assimetria facial ao paciente, sendo realizado tratamento cirúrgico conservador apenas por enucleação da lesão, visando reduzir cirurgias maiores como a parotidectomias parciais ou totais. Após acompanhamento de 5 anos o paciente não apresenta sequelas do tratamento cirúrgico ou sinal de recorrência da lesão.Descritores: Glândula Parótida; Neoplasia; Cirurgia Bucal.
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- 2018
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4. Treatment of frontal bone fracture sequelae through inversion of the bone fragment
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Guto Fidalgo Daumas Moraes, Nicolas Homsi, Hernando Valentim da Rocha Júnior, Jonathan Ribeiro da Silva, Carlos Fernando de Almeida Barros Mourão, and Luiz Fernando Magacho
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Osso Frontal ,Motorcycle accident ,Anterior wall ,lcsh:Surgery ,Traumatismos Craniocerebrais ,03 medical and health sciences ,0302 clinical medicine ,Fixação de Fratura ,Fracture Fixation ,Fracture fixation ,medicine ,Humans ,Craniocerebral Trauma ,Frontal sinus ,Bone Transplantation ,Skull Fractures ,business.industry ,030206 dentistry ,Anatomy ,lcsh:RD1-811 ,Bone fragment ,Frontal bone ,medicine.anatomical_structure ,Frontal bone fracture ,Frontal Bone ,Frontal Sinus ,Surgery ,business ,Duct (anatomy) ,030217 neurology & neurosurgery - Abstract
Treatment of frontal sinus fractures depends on the structures involved: the anterior wall, the posterior wall and the nasofrontal duct. It may vary from the correction of the defect in the anterior wall to the cranialization with obliteration of the nasofrontal duct. The inversion of the frontal sinus's anterior wall to correct the defect in the fractured region is a good treatment option for sequelae, since this technique eliminates or reduces the use of biomaterial in the area, and allows direct assessment of the permeability of the nasofrontal duct. This work describes the technique of fractured segment inversion for the treatment of frontal sinus fracture sequelae in a motorcycle accident victim. RESUMO O tratamento das fraturas do seio frontal depende das estruturas envolvidas: a parede anterior, a parede posterior e o ducto nasofrontal. Os tratamentos podem variar entre corrigir um defeito na parede anterior até a realização de uma cranialização com obliteração do ducto nasofrontal. O uso da inversão da parede anterior do seio frontal para corrigir o defeito na região fraturada representa uma boa opção de tratamento para os casos de sequelas, já que esta técnica elimina ou reduz a utilização de biomaterial nesta área, e permite avaliação da permeabilidade do ducto nasofrontal por acesso direto. Este trabalho descreve a técnica de inversão do segmento fraturado para tratamento de sequelas de fratura do seio frontal em paciente vítima de acidente motociclístico.
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- 2016
5. Surgical Treatment of Retrobulbar Hematoma
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Eduardo Hochuli-Vieira, Guto Fidalgo, João Paulo Bonardi, Hernando Valentim da Rocha-Júnior, Nicolas Homsi, Jonathan Ribeiro, Leonardo de Freitas Silva, and Fabrizio Albieri
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medicine.medical_specialty ,business.industry ,030206 dentistry ,General Medicine ,Surgery ,03 medical and health sciences ,0302 clinical medicine ,Otorhinolaryngology ,Medicine ,030223 otorhinolaryngology ,Surgical treatment ,business ,Retrobulbar hematoma - Published
- 2017
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6. Surgical Treatment of Stage III Bilateral Maxillary Osteonecrosis in an Oncologic Patient
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Nicolas Homsi, Abel Silveira Cardoso, Hernando Valentim da Rocha Júnior, Ana Carolina Organista Corner, and Eduardo Seixas Cardoso
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medicine.medical_specialty ,business.industry ,medicine ,Radiology, Nuclear Medicine and imaging ,Dentistry (miscellaneous) ,Surgery ,Oral Surgery ,Stage (cooking) ,Surgical treatment ,business ,Pathology and Forensic Medicine - Published
- 2018
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7. Intraoral schwannoma: a case report
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Bruno Almeida Boiça, Bruno Gomes Duarte, Cecilia Luiz Pereira-Stabile, Hernando Valentim da Rocha-Júnior, and Luiz Fernando Magacho da Silva
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Adult ,Male ,medicine.medical_specialty ,Usually asymptomatic ,Nerve sheath ,Schwannoma ,Oral cavity ,Malignant transformation ,Benign tumor ,Diagnosis, Differential ,Lesion ,otorhinolaryngologic diseases ,medicine ,Humans ,business.industry ,medicine.disease ,Lip ,Cheek ,Otorhinolaryngology ,Lip Neoplasms ,Oral and maxillofacial surgery ,Surgery ,Radiology ,Oral Surgery ,medicine.symptom ,business ,Neurilemmoma - Abstract
Schwannoma (neurilemmona) is a benign nerve sheath composed of Schwann cells. This tumor represents 1 % of all benign tumor, usually observed in the head and neck region, and in, rare cases, this lesion may be observed in oral cavity. They are usually asymptomatic, do not recur, and malignant transformation is rare. We presented a case report of schwannoma in the lower lips.
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- 2013
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8. Treatment of frontal bone fracture sequelae through inversion of the bone fragment
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JONATHAN RIBEIRO DA SILVA, CARLOS FERNANDO DE ALMEIDA BARROS MOURÃO, HERNANDO VALENTIM DA ROCHA JÚNIOR, LUIZ FERNANDO MAGACHO, GUTO FIDALGO DAUMAS MORAES, and NICOLAS HOMSI
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Frontal Bone ,Fracture Fixation ,Craniocerebral Trauma ,Surgery ,RD1-811 - Abstract
ABSTRACT Treatment of frontal sinus fractures depends on the structures involved: the anterior wall, the posterior wall and the nasofrontal duct. It may vary from the correction of the defect in the anterior wall to the cranialization with obliteration of the nasofrontal duct. The inversion of the frontal sinus's anterior wall to correct the defect in the fractured region is a good treatment option for sequelae, since this technique eliminates or reduces the use of biomaterial in the area, and allows direct assessment of the permeability of the nasofrontal duct. This work describes the technique of fractured segment inversion for the treatment of frontal sinus fracture sequelae in a motorcycle accident victim.
- Full Text
- View/download PDF
9. Mechanical comparison of four methods for internal fixation of Bilateral Sagittal Osteotomy after advancement with clockwise rotation of the mandible
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Pedro Henrique Mattos de Carvalho, Alexandre Elias Trivellato, Hernando Valentim da Rocha Júnior, Valfrido Antonio Pereira Filho, and Cassio Edvard Sverzut
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A osteotomia sagital bilateral é uma das técnicas mais comumente empregada para correções de deformidades mandibulares, tendo se mostrado uma técnica extremamente versátil, por resultar em um íntimo contato dos segmentos, favorecendo uma efetivo reparo ósseo e além de permitir uma fixação adequada e precisa. O objetivo do presente estudo foi realizar uma comparação mecânica de quatro métodos para fixação interna da osteotomia sagital bilateral após avanço com giro horário da mandíbula. Foram utilizadas 56 réplicas de mandíbulas inteiras de poliuretano rígido, customizadas e padronizadas com osteotomia sagital bilateralmente conforme técnica descrita por Epker BN em 1977, mas modificada. Após a simulação de um amplo avanço, onze milímetros (mm) com giro horário da mandíbula (6 graus) em relação ao plano oclusal, os segmentos ósseos foram fixados com placas e parafusos do sistema 2,0mm do lado direito e esquerdo. Grupo I, uma placa em \"H\" duplo, grupo II, duas miniplacas, grupo III, \"técnica híbrida\" e grupo IV, três parafusos bicorticais \"L-invertido\". As mandíbulas foram submetidas a carga entre os incisivos centrais e entre a cúspide mésio e disto vestibular do primeiro molar direito. Na carga entre os incisivos, houve diferença estatisticamente significante no grupo I (placa em \"H\" duplo), em que a média foi maior que as médias dos grupos IV e II no deslocamento de 1 mm (F=4,705; p=0,010). Na carga no primeiro molar, houve diferença das médias de carga quando comparado os grupos no deslocamento de 1 mm (F=5,166; p=0,007). A média do método \"técnica-híbrida\" foi maior que as médias dos métodos da placa em \"H\" duplo e duas placas. Já o método \"L invertido\" não se diferenciou dos outros métodos. Houve diferença das médias de carga quando comparado os grupos no deslocamento de 3 mm (F=3,582; p=0,029). A média do método \"técnica-híbrida\" foi maior que a média do método \"duas placas\". Já os demais métodos não apresentaram diferenças. Houve diferença das médias de carga quando comparado os grupos no deslocamento de 5 mm (F=3,142; p=0,044). A média do método \"L invertido\" foi maior que a média do método \"duas placas\". Os demais métodos não apresentaram diferenças. Entre os deslocamentos de 7 mm não foi observada diferença estatisticamente significante (7 mm: p=0,057). No presente estudo o método \"técnica-híbrida\" foi o de melhor desempenho mecânico, mostrando um comportamento superior em mais momentos quando avaliou-se a carga empregada e os respectivos deslocamentos. Bilateral sagittal osteotomy is one of the most commonly used techniques for correction of mandibular deformities, showing an extremely versatile technique, resulting in an intimate contact of the segments, favoring an effective bone repair and besides allowing an adequate and precise fixation. The objective of the present study was to perform a mechanical comparison of four methods for internal fixation of bilateral sagittal osteotomy after advancement with clockwise rotation of the mandible. We used 56 replicates of rigid polyurethane jaws, customized and standardized with bilateral sagittal osteotomy according to the technique described by Epker BN in 1977, but modified. After simulation of a wide advancement, eleven millimeters (mm) with clockwise rotation of the mandible (6 degrees) in relation to the occlusal plane, the bone segments were fixed with plates and screws of the system 2.0mm of the right and left side. Group I, a double \"H\" plate, group II, two miniplates, group III, \"hybrid technique\" and group IV, three \"L-inverted\" bicortical screws. The mandibles were loaded between the central incisors and between the mesial cusp and the buccal aspect of the right first molar. In the load between the incisors, there was a statistically significant difference in group I (double \"H\" plate), in which the mean was greater than the means of groups IV and II in the displacement of 1 mm (F = 4.705, p = 0.010) . In the first molar load, there were differences in the load means when compared to the groups at 1 mm displacement (F = 5,166, p = 0.007). The mean of the \"technique-hybrid\" method was higher than the mean of the \"double\" H-plate and two-plate methods. The \"inverted L\" method did not differ from the other methods. There was a difference in loading averages when compared to groups at 3 mm displacement (F = 3,582, p = 0.029). The mean of the \"technique-hybrid\" method was higher than the mean of the \"two-plate\" method. The other methods did not present differences. There was a difference in loading means when comparing the groups in the 5 mm displacement (F = 3.142; p = 0.044). The mean of the \"inverted L\" method was higher than the average \"two plate\" method. The other methods did not present differences. Among the 7 mm displacements, no statistically significant difference was observed (7 mm: p = 0.057). In the present study the \"technique-hybrid\" method was the one with the best mechanical performance, showing a superior behavior in more moments when the load used and the respective displacements were evaluated.
- Published
- 2019
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