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Ossificação da sutura palatina mediana após o procedimento de expansão rápida da maxila: estudo radiográfico; Midpalatal suture ossification post rapid palatal expansion: a radiographic study

SILVA FILHO, Omar Gabriel da; GRAZIANI, Guilherme Fernandes; LAURIS, Rita de Cássia Moura Carvalho; LARA, Tulio Silva
Fonte: Dental Press Editora Publicador: Dental Press Editora
Tipo: Artigo de Revista Científica
POR
Relevância na Pesquisa
57.51%
OBJETIVO: o presente trabalho tem como objetivo acompanhar radiograficamente a evolução da ossificação da sutura palatina mediana em pacientes submetidos à expansão rápida da maxila, bem como comprovar a validade de se avaliar a neoformação óssea através deste exame complementar de diagnóstico. METODOLOGIA: a amostra constou de 38 pacientes no estágio de dentadura mista que se submeteram ao protocolo de expansão rápida da maxila, sendo 2/4 de volta pela manhã e 2/4 de volta à noite, totalizando 1 volta completa por dia, compreendendo um período de 7 dias. RESULTADOS: radiografias oclusais de maxila tomadas no pós-tratamento evidenciaram uma variação individual quanto ao período necessário para a completa neoformação óssea da sutura palatina mediana. A imagem radiográfica apresentou-se como um método confiável para a determinação da época correta de remoção do aparelho expansor. Tendo em vista a estabilidade pós-tratamento a longo prazo, o aparelho expansor deve ser removido somente após a completa ossificação da sutura. CONCLUSÕES: os resultados revelaram que são necessários mais de três meses para que o processo de ossificação e reorganização sutural se processe após o procedimento de expansão rápida da maxila.; OBJECTIVE: the current study aims at following up radiographically the evolution of the midpalatal suture during the expansion procedure since the opening of the suture until bone formation. METHODS: the sample comprised 38 patients in the mixed dentition stage submitted to the rapid palatal expansion protocol of the Hospital for Rehabilitation of Craniofacial Anomalies. RESULTS: it was observed an individual variation on the period of bone ossification of the midpalatal suture...

Effect of a low-level laser on bone regeneration after rapid maxillary expansion

Cepera, Fernanda; Torres, Fernando C.; Scanavini, Marco A.; Paranhos, Luiz R.; Capelozza Filho, Leopoldino; Cardoso, Mauricio A.; Siqueira, Danieli C. R.; Siqueira, Danilo F.
Fonte: MOSBY-ELSEVIER; NEW YORK Publicador: MOSBY-ELSEVIER; NEW YORK
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
47.45%
Introduction: In this study, we evaluated the effects of a low-level laser on bone regeneration in rapid maxillary expansion procedures. Methods: Twenty-seven children, aged 8 to 12 years, took part in the experiment, with a mean age of 10.2 years, divided into 2 groups: the laser group (n=14), in which rapid maxillary expansion was performed in conjunction with laser use, and the no-laser group (n=13), with rapid maxillary expansion only. The activation protocol of the expansion screw was 1 full turn on the first day and a half turn daily until achieving overcorrection. The laser type used was a laser diode (TWIN Laser; MMOptics, Sao Carlos, Brazil), according to the following protocol: 780 nm wavelength, 40 mW power, and 10 J/cm(2) density at 10 points located around the midpalatal suture. The application stages were 1 (days 1-5 of activation), 2 (at screw locking, on 3 consecutive days), 3, 4, and 5 (7, 14, and 21 days after stage 2). Occlusal radiographs of the maxilla were taken with the aid of an aluminum scale ruler as a densitometry reference at different times: T1 (initial), T2 (day of locking), T3 (3-5 days after T2), T4 (30 days after T3), and T5 (60 days after T4). The radiographs were digitized and submitted to imaging software (Image Tool; UTHSCSA...

Effect of soft laser in bone repair after expansion of the midpalatal suture in dogs

Costa Evangelista Santiago, Vania Cristina; Piram, Adriana; Fuziy, Acacio
Fonte: MOSBY-ELSEVIER; NEW YORK Publicador: MOSBY-ELSEVIER; NEW YORK
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
47.13%
Introduction: The purpose of this research was to study the influence of soft laser treatment on the process of bone repair after expansion of the midpalatal suture. Methods: The sample for this case-control experimental study was 11 dogs. They were randomly divided into 2 groups, both of which underwent rapid maxillary expansion with a hyrax appliance. The animals in group 1 were also treated with laser therapy. They were killed, and histologic specimens of the palatal suture were prepared. The Student t test was applied for independent data, and the Mann-Whitney test was used for nonparametric data. Results: A significant difference was observed in the quality of the palatal sutures between the animals in groups 1 and 2. The connective tissues of the sutures in the group 1 animals were similar to the original configurations, with more advanced osteogenesis and fibrogenesis, compared with those of group 2. Conclusions: Soft laser appears to influence the behavior of the repair process, contributing to suture reorganization and palatal bone osteogenesis during and after expansion. (Am J Orthod Dentofacial Orthop 2012; 142: 615-24)

Orthodontic movement of a maxillary incisor through the midpalatal suture A case report

Garib, Daniela Gamba; Janson, Guilherme; Santos, Patrícia Bittencourt Dutra dos; Baldo, Taiana de Oliveira; Oliveira, Gabriela Ulian de; Ishikiriama, Sergio Kiyoshi
Fonte: E H ANGLE EDUCATION RESEARCH FOUNDATION, INC; NEWTON N Publicador: E H ANGLE EDUCATION RESEARCH FOUNDATION, INC; NEWTON N
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
47.06%
Orthodontic space closure is a treatment alternative when a maxillary central incisor is missing. The objective of this report was to present an unusual treatment in which a right maxillary central incisor was moved through the midpalatal suture to replace the absent contralateral tooth. The biologic aspects and clinical appearance of the recontoured lateral and central incisors were analyzed. The position of the examined teeth and the appearance of the surrounding soft tissues were satisfactory; however, the upper midline frenulum deviated to the left. The incisor was successfully moved with no obvious detrimental effects as observed on the final radiographs. In the radiographic and tomographic examinations, the midline suture seemed to have followed the tooth movement. The patient expressed satisfaction with the results. It was concluded that orthodontic movement of the central incisor to replace a missing contralateral tooth is a valid treatment option, and the achievement of an esthetic result requires an interdisciplinary approach, including restorative dentistry and periodontics. (Angle Orthod. 2012;82:370-379.)

Avaliação da neoformação óssea na sutura palatina mediana por meio de radiografia digitalizada após a expansão assistida cirurgicamente

Malmström, Marcia Ferreira Vasconcelos
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 17/06/2005 PT
Relevância na Pesquisa
26.81%
Este trabalho objetivou avaliar a neoformação óssea na região da sutura palatina mediana, por meio da densidade óptica em radiografias oclusais digitalizadas, obtidas periodicamente de pacientes adultos submetidos à expansão rápida da maxila assistida cirurgicamente. A amostra constou de 147 radiografias oclusais convencionais obtidas nas fases inicial, pós-expansão imediata e contenção de até 120 dias, as quais foram digitalizadas por meio de um escaner ScanMaker 9800XL com leitor de transparência e analisadas no programa editor de imagem Adobe Photoshop para a obtenção dos valores de pixels, correspondentes à densidade óptica na região da sutura. A análise das radiografias oclusais convencionais foi realizada por um Radiologista. Os testes estatísticos empregados foram a análise de variância (ANOVA), com nível de significância de 5%, e teste de Tukey. A análise de covariância foi realizada para verificação da influência da idade e do sexo nos resultados. Constatou-se que os valores finais da densidade óptica foram significantemente inferiores que os valores iniciais, no período de 120 dias de contenção fixa. A partir dos resultados conclui-se que: 1) Os valores de pixels mostraram uma variabilidade individual no processo de remodelação da sutura; 2) A densidade óptica apresentou um aumento na fase final de contenção de 120 dias...

Avaliação da regeneração óssea, sob a influência do laser de baixa intensidade, na região da sutura palatina de ratos após expansão da maxila; Evaluation of osseous regeneration, using the low-power laserterapy in the midpalatal suture in rats after maxillary expansion

Simões, Francisco Xavier Paranhos Coêlho
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 04/03/2008 PT
Relevância na Pesquisa
36.93%
Uma das condutas terapêuticas mais adotadas na prática ortodôntica para a correção da mordida cruzada posterior é a expansão rápida da maxila. A recidiva pós-disjunção demonstra a necessidade do uso de contenção para garantir o sucesso da terapia. A sutura neoformada e as maxilas devem se manter em sua nova posição por um período mínimo para adquirir estabilidade. Seria um benefício acelerar a neoformação óssea na sutura palatina após a expansão com o objetivo de reduzir o tempo do período de contenção. O uso do laser na regeneração óssea é justificada pela possibilidade de diminuir o tempo de contenção garantindo assim maior estabilidade pós-tratamento. O presente estudo teve como objetivo verificar o efeito do laser de baixa intensidade com diferentes potências na regeneração óssea na região da sutura palatina. Foram utilizados 20 ratos (Wistar), com 45 (quarenta e cinco) dias de idade, divididos em 5 (cinco) grupos, sendo 4 (quatro) ratos cada um, assim descritos: Grupo 1 Não irradiados nem submetidos a disjunção e Grupo 2 Não irradiados, mas submetidos a disjunção. Os Grupos experimentais serão assim distribuídos: Grupo 3 submetidos a disjunção e irradiados com dose única de 4J/cm2; Grupo 4 submetidos a disjunção e irradiados com dose única de 8 J/cm2 e Grupo 5 - submetidos a disjunção e a irradiação com 2 doses de 4 J/cm2. Os grupos irradiados receberam as doses no momento 0 (zero início do estudo) e dois dias após a primeira dose...

Comportamento da sutura palatina mediana em crianças submetidas à expansão rápida da maxila: avaliação mediante imagem de tomografia computadorizada

Silva Filho, Omar Gabriel da; Lara, Tulio Silva; Silva, Helena Cristina da; Bertoz, Francisco Antônio
Fonte: Dental Press Editora Publicador: Dental Press Editora
Tipo: Artigo de Revista Científica Formato: 94-103
POR
Relevância na Pesquisa
26.95%
OBJETIVO: o presente estudo, de caráter prospectivo, objetivou avaliar a imagem da sutura palatina mediana em crianças submetidas à expansão rápida da maxila por meio de tomografia computadorizada, após a fase de contenção. METODOLOGIA: a amostra constou de 17 crianças de ambos os gêneros, na faixa etária compreendida entre 5 anos e 2 meses e 10 anos e 5 meses no início do tratamento, provenientes da Clínica de Ortodontia Interceptiva da Sociedade de Promoção Social do Fissurado Lábio-Palatal da Universidade de São Paulo (PROFIS-USP), Bauru/SP. Tomografias computadorizadas foram implementadas para avaliar o comportamento da sutura palatina mediana em diferentes momentos do tratamento. RESULTADOS E CONCLUSÕES: constatou-se que, após um período médio de 8 a 9 meses de contenção com o aparelho expansor, a sutura palatina mediana mostrou-se completamente ossificada, desde a região da espinha nasal anterior até a espinha nasal posterior. Tal informação esclarece o comportamento da sutura palatina mediana frente à expansão rápida da maxila e reitera o senso comum quanto ao caráter biológico do procedimento.; AIM: The aim of this prospective study was to evaluate the midpalatal suture in children submitted to rapid palatal expansion with computerized tomography. METHODS: The sample was comprised of 17 children aged between 5 years and 2 months and 10 years and 5 months...

Post expansion evaluation of the midpalatal suture in children submitted to rapid palatal expansion: A CT study

Da Silva Filho, Omar Gabriel; Lara, Tulio Silva; Da Silva, Helena Cristina; Bertoz, Francisco Antônio
Fonte: Universidade Estadual Paulista Publicador: Universidade Estadual Paulista
Tipo: Artigo de Revista Científica Formato: 142-148
ENG
Relevância na Pesquisa
57.35%
The aim of this prospective study was to evalute the midpalatal suture in children submitted to rapid palatal expansion, at the end of the retention stage, with CT scans. The sample was comprised of 17 children aged between 5 years 2 months and 10 years 5 months. The tomographic images showed that the midpalatal suture was completely ossified from the anterior nasal spine area to the posterior nasal spine area at the end of the retention phase, that is, 8 to 9 months post-expansion.

Ossificação da sutura palatina mediana após o procedimento de expansão rápida da maxila: Estudo radiográfico

Filho, Omar Gabriels da Silva; Graziani, Guilherme Fernandes; Lauris, Rita de Cássia Moura Cervalho; Lara, Tulio Silva
Fonte: Universidade Estadual Paulista Publicador: Universidade Estadual Paulista
Tipo: Artigo de Revista Científica Formato: 124-131
POR
Relevância na Pesquisa
37.38%
Objective: the current study aims at following up radiographically the evolution of the midpalatal suture during the expansion procedure since the opening of the suture until bone formation. Methods: the sample comprised 38 patients in the mixed dentition stage submitted to the rapid palatal expansion protocol of the Hospital for Rehabilitation of Craniofacial Anomalies. Results: it was observed an individual variation on the period of bone ossification of the midpalatal suture, which justifies the radiographic follow-up as determinant for the appliance removal. Due to long-term post-treatment stability, the expander should be removed after the new suture is completely formed. Conclusions: the findings show that it is necessary more than three months for the complete reorganization of the midpalatal suture during the passive phase of the rapid palatal expansion.

Midpalatal suture maturation: Classification method for individual assessment before rapid maxillary expansion

Angelieri, Fernanda; Cevidanes, Lucia H. S.; Franchi, Lorenzo; Goncalves, Joao R.; Benavides, Erika; McNamara, James A.
Fonte: Elsevier B.V. Publicador: Elsevier B.V.
Tipo: Artigo de Revista Científica Formato: 759-769
ENG
Relevância na Pesquisa
47.56%
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP); Introduction: In this study, we present a novel classification method for individual assessment of midpalatal suture morphology. Methods: Cone-beam computed tomography images from 140 subjects (ages, 5.6-58.4 years) were examined to define the radiographic stages of midpalatal suture maturation. Five stages of maturation of the midpalatal suture were identified and defined: stage A, straight high-density sutural line, with no or little interdigitation; stage B, scalloped appearance of the high-density sutural line; stage C, 2 parallel, scalloped, high-density lines that were close to each other, separated in some areas by small low-density spaces; stage D, fusion completed in the palatine bone, with no evidence of a suture; and stage E, fusion anteriorly in the maxilla. Intraexaminer and interexaminer agreements were evaluated by weighted kappa tests. Results: Stages A and B typically were observed up to 13 years of age, whereas stage C was noted primarily from 11 to 17 years but occasionally in younger and older age groups. Fusion of the palatine (stage D) and maxillary (stage E) regions of the midpalatal suture was completed after 11 years only in girls. From 14 to 17 years...

An assessment of the maxilla after rapid maxillary expansion using cone beam computed tomography in growing children

Woller,Jessica L.; Kim,Ki Beom; Behrents,Rolf G.; Buschang,Peter H.
Fonte: Dental Press International Publicador: Dental Press International
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/02/2014 EN
Relevância na Pesquisa
27.13%
INTRODUCTION: With the advent of cone beam computed tomography (CBCT), it is now possible to quantitatively evaluate the effects of rapid maxillary expansion (RME) on the entire maxillary complex in growing patients. OBJECTIVE: The purpose of this study is to use three-dimensional images to evaluate the displacement that occurs at the circummaxillary sutures (frontonasal, zygomaticomaxillary, intermaxillary, midpalatal, and transpalatal sutures) following rapid maxillary expansion in growing children. METHODS: The CBCT scans of 25 consecutively treated RME patients (10 male, 15 female) with mean age of 12.3 ± 2.6 years, were examined before expansion and immediately following the last activation of the expansion appliance. RESULTS: Statistically significant (P < 0.05) amounts of separation were found for the displacement of the bones of the frontonasal suture, the intermaxillary suture, the zygomaticomaxillary sutures, and the midpalatal suture. The change in angulation of the maxillary first molars due to RME was also statistically significant. There was no statistically significant displacement of the transpalatal suture. CONCLUSIONS: Rapid maxillary expansion results in significant displacement of the bones of circummaxillary sutures in growing children.

Mechanical force-induced midpalatal suture remodeling in mice

Hou, Bo; Fukai, Naomi; Olsen, Bjorn R.
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
47.51%
Mechanical stress is an important epigenetic factor for regulating skeletal remodeling, and application of force can lead to remodeling of both bone and cartilage. Chondrocytes, osteoblasts and osteoclasts all participate and interact with each other in this remodeling process. To study cellular responses to mechanical stimuli in a system that can be genetically manipulated, we used mouse midpalatal suture expansion in vivo. 6-weeks-old male C57BL/6 mice were subjected to palatal suture expansion by opening loops with an initial force of 0.56N for periods of 1, 3, 7, 14 or 28 days. Periosteal cells in expanding sutures showed increased proliferation, with Ki67 positive cells representing 1.8±0.1% to 4.5±0.4% of total suture cells in control groups and 12.0±2.6% to 19.9±1.2% in experimental/expansion groups (p<0.05). Starting at day 1, cells expressing alkaline phosphatase and type I collagen were seen. New cartilage and bone formation was observed at the oral edges of the palatal bones at day 7; at the nasal edges only bone formation without cartilage appeared to occur. An increase in osteoclast numbers suggested increased bone remodeling, ranging from 60 to 160% throughout the experimental period. Decreased Saffranin O staining after day 3 suggested decreased proteoglycan content in the secondary cartilage. MicroCT showed a significant increase in maxillary width at days 14 and 28 (from 2334±4μm to 2485±3μm at day 14 and from 2383±5μm to 2574±7μm at day 28...

The polycystic kidney disease 1 (Pkd1) gene is required for the responses of osteochondroprogenitor cells to midpalatal suture expansion in mice

Hou, Bo; Kolpakova-Hart, Elona; Fukai, Naomi; Wu, Kimberly; Olsen, Bjorn R.
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
47.51%
Mechanical stress is known to modulate postnatal skeletal growth and development. However, the mechanisms underlying the mechanotransduction are not fully understood. Polycystin-1 (PC1) is a promising candidate among proteins that may play a role in the process as it has been shown to function as a flow sensor in renal epithelium and it is known to be important for skeletal development. To investigate whether PC1 is involved in mechanotransduction in skeletal tissues, mice with a conditional deficiency for PC1 in neural crest cells, osteoblasts or chondrocytes were subjected to midpalatal suture expansion. Dynamic bone labeling revealed that new bone formation in response to expansion was significantly reduced in Wnt1Cre;Pkd1 mice, as the suture area containing new bone was 14.0±3.4% in mutant mice versus 65.0±3.8% in control mice at 2 weeks (p<0.001). In contrast, stress-induced new bone formation was not affected in OsxCre;Pkd1 mice. The increase in cell proliferation and differentiation into osteoblasts, seen in wild-type mice 1 day after force delivery, was not observed until 14 days in Wnt1Cre;Pkd1 mice. TUNEL labeling showed a significant increase in apoptotic suture cells at days 1 and 3 (from 7.0±0.5% to 13.5±1.4% at day 1 and from 4.6±1.1% to 10.5±1.7% at day 3...

Effect of heterologous bone marrow mononuclear cell transplantation on midpalatal expansion in rats

GUO, JIE; WANG, LUE; XU, HAIHUA; CHE, XIAOXIA
Fonte: D.A. Spandidos Publicador: D.A. Spandidos
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
37.23%
The aim of this study was to explore whether bone marrow mononuclear cell (BMMC) transplantation is able to accelerate the bone remodeling induced by midpalatal expansion in rats. A total of 48 male Sprague-Dawley rats (mean weight, 208.36±7.32 g) were divided into control and midpalatal expansion with or without BMMC transplantation groups. Histological and morphological changes were observed in each group. The osteogenic activities and differential potentials of the transplanted BMMCs labeled with bromodeoxyuridine in the midpalatal bone tissue were assessed by osteocalcin expression. The receptor activator of nuclear factor κB ligand (RANKL)/osteoprotegerin (OPG) ratio was determined by reverse transcription-quantitative polymerase chain reaction (RT-qPCR) to reflect the equilibrium between bone resorption and formation. The results demonstrated that the width of the maxillary dental arch increased distinctly within 2 weeks of midpalatal expansion with BMMC transplantation. The morphology of the midpalatal suture in this group changed significantly; the cartilage was completely replaced by fibrous-like tissue expressing osteocalcin. The palatal bone was reorganized from a cancellous form into a mature compact structure after an additional 2-week relapse period. Immunostaining results indicated that the heterologous transplanted BMMCs survived and differentiated into osteoblasts during the remodeling induced by midpalatal expansion. The RANKL/OPG expression ratio significantly decreased after 2 weeks of midpalatal expansion with BMMC transplantation due to the inhibition of RANKL expression. Heterologous BMMC transplantation appears to accelerate the midpalatal bone remodeling induced by expansion of the rats through increasing the number of osteoprogenitor cells and regulating the RANKL-OPG signaling pathway.

Diabetes mellitus altera a sinalização osteogênica e atrasa o processo de reparo ósseo após expansão rápida da maxila; Diabetes Mellitus modify the osteogenesis signaling and compromise bone repair after rapid maxillary expansion

Arnez, Maya Fernanda Manfrin
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 18/09/2014 PT
Relevância na Pesquisa
26.74%
Introdução: O diabetes mellitus (DM) é uma doença crônica caracterizada pela hiperglicemia associada a diversas alterações sistêmicas e uma das suas complicações é o processo de reparo ósseo comprometido. Entretanto, ainda não há estudos utilizando análises celulares e biomoleculares que avaliem o processo de reparo ósseo desta desordem metabólica quando associada à expansão rápida da maxila (ERM). Objetivo: O objetivo deste estudo foi avaliar a remodelação óssea e sinalização osteogênica durante a aplicação de mecânica ortodôntica para ERM em ratos diabéticos tipo1- induzidos. Material e Métodos: Cento e cinquenta ratos Wistar, machos, foram divididos aleatoriamente em seis grupos de estudo. Grupos: controle (C, n=30), veículo (V, n=15), diabetes mellitus tipo 1 induzido com estreptozotocina (D, n=30), controle submetido à ERM (Cd, n=30), veículo submetido à ERM (Vd, n=15) e diabetes mellitus tipo 1 induzido com estreptozotocina submetido à ERM (Dd, n=30). Os animais foram eutanasiados aos 3, 7 e 10 dias após ERM . Análises histológicas, mudanças no padrão de expressão gênica e proteica de osteoprotegerina, (OPG), RANK, RANKL, osteonectina (ONC), osteocalcina (OCC), sialoproteína óssea (BSP)...

Effect of low-level laser therapy after rapid maxillary expansion on proliferation and differentiation of osteoblastic cells

Bernardes da Silva, Ana Paula R.; Petri, Alice D.; Crippa, Grasiele E.; Stuani, Adriana Sasso; Stuani, Andrea Sasso; Rosa, Adalberto Luiz; Sasso Stuani, Maria Bernadete
Fonte: SPRINGER LONDON LTD; LONDON Publicador: SPRINGER LONDON LTD; LONDON
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
37.56%
The aim of this study was to investigate the osteoblastic activity of cells derived from the midpalatal suture upon treatment with low-level laser therapy (LLLT) after rapid maxillary expansion (RME). A total of 30 rats were divided into two groups: experimental I (15 rats with RME without LLLT) and experimental II (15 rats with RME + LLLT). The rats were euthanized at 24 h, 48 h, and 7 days after RME, when the osteoblastic cells derived from the rats' midpalatal suture were explanted. These cells were cultured for periods up to 17 days, and then in vitro osteogenesis parameters and gene expression markers were evaluated. The cellular doubling time in the proliferative stage (3-7 days) was decreased in cultured cells harvested from the midpalatal suture at 24 and 48 h after RME + LLLT, as indicated by the increased growth of the cells in a culture. Alkaline phosphatase activity at days 7 and 14 of the culture was increased by LLLT in cells explanted from the midpalatal suture at 24 and 48 h and 7 days after RME. The mineralization at day 17 was increased by LLLT after RME in all periods. Results from the real-time PCR demonstrated that cells harvested from the LLLT after RME group showed higher levels of ALP, Runx2, osteocalcin, type I collagen...

Avaliação e mensuração da sutura palatina mediana por meio da radiografia oclusal total digitalizada em pacientes submetidos à expansão rápida maxilar; Evaluation and measurement of midpalatal suture through the digitalized occlusal radiography in patients submitted to rapid maxillary expansion

DAVID, Sandra Maria Nobre; CASTILHO, Julio Cezar de Melo; ORTOLANI, Cristina Lucia Feijó; DAVID, Antonio Francisco; MANHÃES JUNIOR, Luiz Roberto Coutinho; MATSUI, Roberto Hiroshi
Fonte: Dental Press Editora Publicador: Dental Press Editora
Tipo: Artigo de Revista Científica
POR
Relevância na Pesquisa
67.48%
OBJETIVOS: avaliar e mensurar a sutura palatina mediana por meio de radiografias oclusais totais de maxila digitalizadas, antes e depois da sua disjunção. MÉTODOS: a amostra constou de 17 pacientes, com idades entre 7 e 22 anos. Radiografias oclusais totais da maxila foram executadas antes e depois da abertura da sutura palatina mediana, e digitalizadas em scanner HP Scanjet 6110 C com adaptador de transparências HPC 6261 6100 C, utilizando-se o programa Deskscan II. Para a avaliação e medição, foi utilizado o programa Radioimp® (Radiomemory, MG/Brasil). Na análise estatística, foram utilizados a média, o desvio-padrão, o coeficiente de variação e os testes "t" e ANOVA. CONCLUSÕES: após os resultados, foi possível concluir que (1) na região dos incisivos, houve uma abertura palatina mediana estatisticamente significativa; (2) houve abertura de diastema entre os incisivos centrais superiores em torno de 69,37% dos casos; (3) houve uma maior abertura da sutura palatina mediana na região a 10mm a partir da crista para posterior, em comparação com a região a 3mm para posterior do parafuso expansor; (4) na região a 3mm para posterior do parafuso expansor houve uma abertura de 35,97%, e na região a 10mm para posterior da crista uma abertura de 69...

Avaliação e mensuração da sutura palatina mediana por meio da radiografia oclusal total digitalizada em pacientes submetidos à expansão rápida maxilar

David, Sandra Maria Nobre; Castilho, Julio Cezar de Melo; Ortolani, Cristina Lucia Feijó; David, Antonio Francisco; Manhães Junior, Luiz Roberto Coutinho; Matsui, Roberto Hiroshi
Fonte: Dental Press Editora Publicador: Dental Press Editora
Tipo: Artigo de Revista Científica Formato: 62-68
POR
Relevância na Pesquisa
47.34%
OBJETIVOS: avaliar e mensurar a sutura palatina mediana por meio de radiografias oclusais totais de maxila digitalizadas, antes e depois da sua disjunção. MÉTODOS: a amostra constou de 17 pacientes, com idades entre 7 e 22 anos. Radiografias oclusais totais da maxila foram executadas antes e depois da abertura da sutura palatina mediana, e digitalizadas em scanner HP Scanjet 6110 C com adaptador de transparências HPC 6261 6100 C, utilizando-se o programa Deskscan II. Para a avaliação e medição, foi utilizado o programa Radioimp® (Radiomemory, MG/Brasil). Na análise estatística, foram utilizados a média, o desvio-padrão, o coeficiente de variação e os testes t e ANOVA. CONCLUSÕES: após os resultados, foi possível concluir que (1) na região dos incisivos, houve uma abertura palatina mediana estatisticamente significativa; (2) houve abertura de diastema entre os incisivos centrais superiores em torno de 69,37% dos casos; (3) houve uma maior abertura da sutura palatina mediana na região a 10mm a partir da crista para posterior, em comparação com a região a 3mm para posterior do parafuso expansor; (4) na região a 3mm para posterior do parafuso expansor houve uma abertura de 35,97%, e na região a 10mm para posterior da crista uma abertura de 69...

A bilinear elastic constitutive model applied for midpalatal suture behavior during rapid maxillary expansion

Serpe,Larissa Carvalho Trojan; Las Casas,Estevam Barbosa de; Toyofuku,Ana Cláudia Moreira Melo; González-Torres,Libardo Andrés
Fonte: Sociedade Brasileira de Engenharia Biomédica Publicador: Sociedade Brasileira de Engenharia Biomédica
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/01/2015 EN
Relevância na Pesquisa
67.41%
Introduction: This study aims to evaluate the influence of the biomechanical behavior of the midpalatal suture (MPS) during the rapid maxillary expansion (RME) when modeled by the Finite Element Method. Methods Four simulation alternatives are discussed and, for each analysis, the suture is considered as a functional unit with a different mechanical behavior: (i) without MPS elements, (ii) MPS with Young's modulus (E) equal to 1 MPa, (ii) MPS with E equal to 0.01 MPa and (iv) MPS with bilinear elastic behavior. Results The stress analysis showed that, when MPS is not considered in the model, stress peaks are reduced in magnitude and their distribution is restricted to a smaller area when compared to the model with the inclusion of MPS (E=1 MPa). The increased suture stiffness also has a direct influence on MPS displacements after 30 expander activations. Conclusion The consideration of the MPS in RME computer models influences greatly the calculated displacements between the suture bone ends, even as the stress levels in maxillary structures. Furthermore, as proposed for the described model, the elastic bilinear behavior assigned to MPS allows coherent prediction of stresses and displacements results, being a good representation for this suture overall behavior.

Evaluation of opening pattern and bone neoformation at median palatal suture area in patients submitted to surgically assisted rapid maxillary expansion (SARME) through cone beam computed tomography

SALGUEIRO, Daniel Gomes; RODRIGUES, Vitor Hugo Leite de Oliveira; TIEGHI NETO, Victor; MENEZES, Carolina Carmo de; GONÇALES, Eduardo Sanches; FERREIRA JÚNIOR, Osny
Fonte: Universidade de São Paulo. Faculdade de Odontologia de Bauru Publicador: Universidade de São Paulo. Faculdade de Odontologia de Bauru
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; ; Formato: application/pdf
Publicado em 01/08/2015 ENG
Relevância na Pesquisa
37.49%
AbstractSurgically assisted rapid maxillary expansion (SARME) is the treatment of choice to adult patients even with severe transversal maxillary discrepancies. However, the adequate retention period to achieve the bone remodeling, thus assuring treatment stability, is controversial.Objective To evaluate the opening pattern and bone neoformation process at the midpalatal suture in patients submitted to surgically assisted (SARME) through cone beam computed tomography (CBCT).Material and Methods Fourteen patients were submitted to SARME through subtotal Le Fort I osteotomy. Both the opening pattern and the mean bone density at midpalatal suture area to evaluate bone formation were assessed pre- and post-operatively (15, 60 and 180 days) through CBCT.Results Type I opening pattern (from anterior to posterior nasal spine) occurred in 12 subjects while type II opening pattern (from anterior nasal spine to transverse palatine suture) occurred in 2 individuals. The 180-day postoperative mean (PO 180) of bone density value was 49.9% of the preoperative mean (Pre) value.Conclusions The opening pattern of midpalatal suture is more related to patients’ age (23.9 years in type I and 33.5 years in type II) and surgical technique. It was not possible to observe complete bone formation at midpalatal suture area at the ending of the retention period studied (180 days).