Unilateral condylar hyperplasia: a treatment strategy.

Condylar hyperplasia (CH) is a pathologic condition that causes overdevelopment of the condylar head and neck as well as the mandible. Slowly progressive unilateral enlargement of the head and the neck of the condyle causes crossbite malocclusion, facial asymmetry, and shifting of the midpoint of the chin to the unaffected side. The etiology and the pathogenesis of CH remain uncertain. The diagnosis is made by clinical and radiologic examinations and bone scintigraph. A difference in uptake of 10% or more between condyles is regarded as indicative of CH, and the affected condyles had a relative uptake of 55% or more. When the diagnosis of active CH is established, the treatment consists of removal of the growth center by a partial condylectomy. The authors present the case of a 46-year-old male patient with right active type II CH or hemimandibular hyperplasia who underwent a high condylectomy.

The primary closure approach of dog bite injuries of the nose.

The nose holds an outstanding position on the face, acquiring great importance within the context of facial aesthetics. Because of the functional, psychological, and social aspects of trauma in a society increasingly demanding about aesthetics, treatment institution must reduce, as accurate as possible, the sequelae that hinder social integration. This clinical report relates an immediate nasal reconstruction of a complex animal bite wound. A 7-year-old patient was victim of a dog bite with avulsion of the left nasal ala and part of the ipsilateral nasal tip. The treatment was immediate nasal reconstruction with auricular composite graft. After 1 year of follow-up, the shape of nasal ala was stable, and the color was consistent with the surrounding tissue. The 2 nasal sides exhibited satisfactory symmetry when evaluated. It can be concluded that the composite graft derived from the auricular helix is a safe option for reconstruction of nasal ala defects with compromised margins in pediatric patients when conditions of reimplantation do not exist.

Processo de reparo ósseo diante de três tipos de superfície de titânio: análise histomorfométrica e por microscopia eletrônica de varredura associada ao EDS: estudo experimental / Bone repair process on three types of titanium surface: histomorphometric analysis and scanning electron microscopy combined with EDS: experimental study

Proposição: Tendo em vista a influência positiva do tratamento de superfície do implante no processo de reparo e/ou regeneração óssea peri-implantar, propusemos neste estudo caracterizar histologicamente o tecido ósseo neoformado em condições diferentes de superfícies de titânio. Material e Método: foram realizados procedimentos cirúrgicos em 75 ratos (Rattus norvegicus albinus,Wistar), divididos em 3 grupos de 25 animais, onde se obteve acesso ao terço superior da tíbia direita de cada rato para a posterior instalação dos implantes. O 1º grupo recebeu o implante de superfície polida (GRUPO POLIDO - GP), o 2° recebeu um implante com superfície usinada (GRUPO USINADO - GU) e o 3º grupo recebeu o implante de superfície tratada com ácido (GRUPO TRATADO - GT). No total foram 3 grupos, 25 implantes por grupo e 1 implante por animal. Nos períodos de 3, 7, 15, 21 e 40 dias pós-operatórios, os animais foram submetidos à eutanásia e com as amostras teciduais obtidas foram realizadas as análises histomorfométricas, por microscopia eletrônica de varredura (MEV) e Espectroscopia de Raios X por Dispersão em Energia (EDS). Resultados: O resultado das análises por MEV das superfícies demonstrou diferenças topográficas entre elas, sendo a superfície mais lisa e regular a do GP, seguida pela superfície do GU e, por fim, a superfície com maior rugosidade, a do GT. Comparando-se os valores de BIC (Bone to Implant Contact) dos três grupos para um mesmo período (medindo tanto osso em contato com a região cortical quanto medular da tíbia), houve diferença estatisticamente significante (p<0,05) somente no período inicial de osseointegração (7 dias) entre os valores de GP e GT, onde p=0,0189 e a porcentagem de BIC foi de 70% e 94%, respectivamente. Conclusão: O processo de osseointegração dos implantes aconteceu com o mesmo padrão qualitativo tanto nas superfícies polidas (GP), quanto nas usinadas (GU) e tratadas com subtração ácida (GT). Em contato com a superfície de titânio dos...

Purpose: Given the positive influence of the surface treatment of implants in the healing and/or peri-implant bone regeneration process, we proposed on this study histologically characterize the newly formed bone tissue under different titanium surfaces. Material and Methods: Surgical procedures were performed on 75 rats (Rattus norvegicus Albinus, Wistar) were divided into 3 groups of 25 animals, where we had access to the upper third of the right tibia of each rat for the subsequent installation of the implants. The first group received the implant polished surface (POLISHED GROUP - GP), the second received an implant with machined surface (MACHINED GROUP - GU) and the third group received the implant surface treated with acid (TREATED GROUP - GT). In total there were 3 groups, 25 implants per group and 1 implant per animal. In periods of 3, 7, 15, 21 e 40 postoperative day, the animals were euthanized and tissue samples obtained were submitted to the histomorphometric analyses by scanning electron microscopy (SEM) and were performed by Energy Dispersive X Ray Spectroscopy (EDS). Results: The results of SEM analysis of the surfaces showed topographical differences among them being the most smooth and regular surface of the GP, then the surface of the GU and, finally, with greater surface roughness, the GT. Comparing the BIC values of the three groups for the same period (measuring both cortical as trabecular region of the tibia), a statistically significant 17 difference (p <0.05) was found only in the initial period of osseointegration (7 days) between the GP and GT values, where p = 0.0189 and the BIC percentage was 70% and 94%, respectively. Conclusion: The process of osseointegration of implants happened with same quality standard in both polished surfaces (GP), as on machined (GU) and treated with acid subtraction (GT). In contact with the surface of titanium implants bone corticalization occurred even in the next bone marrow of tibias areas. The...

Processo de reparo ósseo diante de três tipos de superfície de titânio: análise histomorfométrica e por microscopia eletrônica de varredura associada ao EDS: estudo experimental / Bone repair process on three types of titanium surface: histomorphometric analysis and scanning electron microscopy combined with EDS: experimental study

Tendo em vista a influência positiva do tratamento de superfície do implante no processo de reparo e/ou regeneração óssea peri-implantar, propusemos neste estudo caracterizar histologicamente o tecido ósseo neoformado em condições diferentes de superfícies de titânio. Material e Método: foram realizados procedimentos cirúrgicos em 75 ratos (Rattus norvegicus albinus,Wistar), divididos em 3 grupos de 25 animais, onde se obteve acesso ao terço superior da tíbia direita de cada rato para a posterior instalação dos implantes. O 1º grupo recebeu o implante de superfície polida (GRUPO POLIDO - GP), o 2° recebeu um implante com superfície usinada (GRUPO USINADO - GU) e o 3º grupo recebeu o implante de superfície tratada com ácido (GRUPO TRATADO - GT). No total foram 3 grupos, 25 implantes por grupo e 1 implante por animal. Nos períodos de 3, 7, 15, 21 e 40 dias pós-operatórios, os animais foram submetidos à eutanásia e com as amostras teciduais obtidas foram realizadas as análises histomorfométricas, por microscopia eletrônica de varredura (MEV) e Espectroscopia de Raios X por Dispersão em Energia (EDS). Resultados: O resultado das análises por MEV das superfícies demonstrou diferenças topográficas entre elas, sendo a superfície mais lisa e regular a do GP, seguida pela superfície do GU e, por fim, a superfície com maior rugosidade, a do GT. Comparando-se os valores de BIC (Bone to Implant Contact) dos três grupos para um mesmo período (medindo tanto osso em contato com a região cortical quanto medular da tíbia), houve diferença estatisticamente significante (p<0,05) somente no período inicial de osseointegração (7 dias) entre os valores de GP e GT, onde p=0,0189 e a porcentagem de BIC foi de 70% e 94%, respectivamente. Conclusão: O processo de osseointegração dos implantes aconteceu com o mesmo padrão qualitativo tanto nas superfícies polidas (GP), quanto nas usinadas (GU) e tratadas com subtração ácida (GT)...

Purpose: Given the positive influence of the surface treatment of implants in the healing and/or peri-implant bone regeneration process, we proposed on this study histologically characterize the newly formed bone tissue under different titanium surfaces. Material and Methods: Surgical procedures were performed on 75 rats (Rattus norvegicus Albinus, Wistar) were divided into 3 groups of 25 animals, where we had access to the upper third of the right tibia of each rat for the subsequent installation of the implants. The first group received the implant polished surface (POLISHED GROUP - GP), the second received an implant with machined surface (MACHINED GROUP - GU) and the third group received the implant surface treated with acid (TREATED GROUP - GT). In total there were 3 groups, 25 implants per group and 1 implant per animal. In periods of 3, 7, 15, 21 e 40 postoperative day, the animals were euthanized and tissue samples obtained were submitted to the histomorphometric analyses by scanning electron microscopy (SEM) and were performed by Energy Dispersive X Ray Spectroscopy (EDS). Results: The results of SEM analysis of the surfaces showed topographical differences among them being the most smooth and regular surface of the GP, then the surface of the GU and, finally, with greater surface roughness, the GT. Comparing the BIC values of the three groups for the same period (measuring both cortical as trabecular region of the tibia), a statistically significant 17 difference (p <0.05) was found only in the initial period of osseointegration (7 days) between the GP and GT values, where p = 0.0189 and the BIC percentage was 70% and 94%, respectively. Conclusion: The process of osseointegration of implants happened with same quality standard in both polished surfaces (GP), as on machined (GU) and treated with acid subtraction (GT). In contact with the surface of titanium implants bone corticalization occurred even in the next bone marrow of tibias areas...