Dissertations / Theses on the topic 'Cicatrização alveolar'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 19 dissertations / theses for your research on the topic 'Cicatrização alveolar.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
Regina, Gonçalves de Araújo Flávia. "Desnutrição neonatal e bacteremia em processo de alveolite dentária em ratos: análise bacteriológica e histológica." Universidade Federal de Pernambuco, 2011. https://repositorio.ufpe.br/handle/123456789/8364.
Full textCoordenação de Aperfeiçoamento de Pessoal de Nível Superior
A desnutrição neonatal, mesmo após um período de recuperação nutricional, é capaz de comprometer os mecanismos de defesa no organismo adulto. Isto se deve ao fato de que o período neonatal corresponde a uma fase de grande vulnerabilidade, em decorrência da formação dos diversos sistemas orgânicos. Assim sendo, o objetivo dessa pesquisa foi estudar o processo de alveolite dentária em seus aspectos bacteriológicos e histológicos relacionandoos com o desenvolvimento de bacteremia em ratos adultos desnutridos no período neonatal. Foram utilizados 40 ratos, machos, Wistar, amamentados por mães que receberam dieta durante a lactação contendo 17% de caseína, grupo nutrido (N) ou 8% de caseína, grupo desnutrido (DN). Após o desmame, os animais foram recuperados com dieta padrão, Labina® contendo 23% de proteínas mistas até o final do experimento. Depois de 90 dias, estes animais foram submetidos à extração do incisivo superior direito e indução da alveolite, os quais permitiram obter os seguintes resultados: antes e depois da extração evidenciou-se menor crescimento bacteriano dado por unidade formadora de colônia (UFC) na região perialveolar de incisivos superiores direito dos animais desnutridos, tal fato ocorreu de forma inversa após a alveolite, onde se constatou uma maior quantidade de UFC nestes animais. O percentual de hemoculturas positivas obtido após a alveolite foi maior nos animais desnutridos. Com relação à osteocalcina, houve redução da mesma no grupo N-28 e aumento no grupo DN-28; a disponibilidade do cálcio iônico foi maior nos animais nutridos e o processo de cicatrização alveolar apresentou também um maior desenvolvimento nestes animais. Pode-se assim concluir que, a desnutrição neonatal foi capaz de provocar uma diminuição na resposta imunológica dos animais, promovendo alterações perceptíveis em suas defesas contra os agentes infecciosos ainda no organismo adulto. Estas alterações foram evidenciadas na composição da microbiota pertencente à região peri-alveolar e no desenvolvimento de bacteremia, comprovando através deste, a existência de uma relação direta entre doenças bucais e sistêmicas. Outrossim, foi observado retardo no processo de cicatrização alveolar com modificações nos níveis de osteocalcina e do cálcio iônico
Coutinho, Carolina Chiantelli Cláudio. "Expressão das proteínas osteoprotegerina, RANK e RANKL durante o processo de reparo alveolar em ratos : estudo imunoistoquímico /." Araçatuba, 2005. http://hdl.handle.net/11449/88947.
Full textAbstract: In the bone healing dynamics, the resorption and neoformation processes are dependent. Proteins involved in the cellular differentiation determinate the activation or inhibition of the activities that regulate the gain or loss of bone mass. From all of the identified bone proteins, it may be distinguished the OPG, RANK and RANKL. The present study has the aim to identify, in the different periods of alveolar bone healing chronology, the expression of OPG, RANK and RANKL proteins using the immunohistochemistry methodology. To perform this study, 60 male rats had the right upper incisive extracted and they were perfused at 14, 21 and 28 pos-operative days. The hemimaxilla with the rat extraction socket was removed, pos fixed and decalcified in EDTA. Then, they were cryoprotected and longitudinal slices with 14 ìm thickness were obtained in cryostat. The slices were submitted to immunohistochemistry reaction and the primary antibodies used were against OPG, RANK and RANKL proteins. It was used the avidinbiotin system to amplify the sign and diaminobenzidine was the cromogen. The results show that there is a balance in the expression of the proteins, showing that there is an increase in the expression of RANK at 14 and 21 pos-operative periods. In relation to OPG and RANKL, these proteins presents a similar expression in all of the pos-extraction periods analysed in this study and at 28 days after the extraction there is the greater expression of both proteins.
Orientador: Roberta Okamoto
Coorientador: Roelf Justino Cruz Rizollo
Banca: Idelmo Rangel Garcia Júnior
Banca: Victor Elias Arana-Chavez
Mestre
Almeida, Júnior Paulo. "Influência de três hemostáticos tópicos no processo de reparo em feridas de extração dental : análise histológica e histométrica em ratos /." Araçatuba, 2004. http://hdl.handle.net/11449/88932.
Full textBanca: Élio Hitoshi Shinohara
Banca: Celso Koogi Sonoda
Resumo: A hemorragia após extração dental constitui-se em uma das complicações mais freqüentes na prática da cirurgia oral. Devido à dificuldade para se exercer manobras como pinçamentos e ligaduras de vasos neste tipo de hemorragias, existe a possibilidade do preenchimento do alvéolo com materiais hemostáticos de ação tópica. O propósito deste estudo foi analisar a influência de três hemostáticos tópicos (Hemostop®, Pro Tape® e ViscoStat®) na cronologia do processo de reparo em feridas de extração dental por meio de uma análise histológica e histométrica. Para tanto foram utilizados 60 ratos (Wistar) machos divididos em quatro grupos de 15 animais cada. Todos os animais foram submetidos à extração do incisivo central superior direito, seguido ou não da colocação de agente hemostático entre o terço médio e apical do alvéolo dental, e posterior sutura com fio reabsorvível. Em grupos de cinco, os animais foram sacrificados aos 7, 14 e 28 dias pós-operatórios por inalação excessiva de éter sulfúrico. Suas maxilas foram separadas, fixadas em formalina, descalcificadas em EDTA e incluídas em parafina. Foram realizados cortes de 6 æm de espessura e corados com Hematoxilina e Eosina, e Tricrômio de Masson. Após a análise histológica, em microscópio óptico; e histometria óssea, com o software ImageLab, os resultados foram submetidos ao teste não-paramétrico de Kruskal-Wallis. Pela metodologia aplicada foi possível concluir que: 1) houve atraso na cronologia do processo de reparo alveolar em todos os grupos tratados; 2) os materiais analisados provocaram intensa reação inflamatória no tecido adjacente; 3) em todos os períodos estudados (7, 14 e 28 dias), a análise histométrica revelou maior neoformação óssea nos animais do grupo 1 (controle). No entanto, a análise estatística constatou diferença significante (p<0,05) somente no 70 dia,...(Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The hemorrhage after dental extraction is one of the most frequent complications in practice of the oral surgery. Due to the difficulty to exercise maneuvers as arrestty and ligature of blood vessel in this type of hemorrhages, exists the possibility of the filling of the alveolus with hemostatics materials of topical action. The purpose of this study was to analyze the influence of three topical hemostatics (Hemostop®, Pro Tape® and ViscoStat®) in the chronology of the repair process in wounds of dental extraction through a histologic and histometric analysis. For such, 60 male's rats (Wistar) were used divided in four groups of 15 animals each. All the animals were submitted to the extraction of the right superior central incisor, followed or not of the placement of hemostatics agent among the medium and apical third of the dental alveolus, and subsequent suture with reabsorble filament. In groups of five, the animals were sacrificed to the 7, 14 and 28 postoperative days by excessive inhalation of sulfuric ether. Your maxillaries were separate, fixed in formalin solution, decalcified in EDTA and included in paraffin. Cuts of 6 æm of thickness were accomplished and stained with hematoxylin and eosin, and Masson's trichromic. After the histologic analysis, in optical microscope; and histometric bony, with the software ImageLab, the results were submitted to the no-parametric test of Kruskal-Wallis. For the applied methodology it was possible conclude that: 1) there was delay in the chronology of the alveolar repair process in all the treated groups; 2) the analyzed materials instigated a intense inflammatory reaction in the adjacent tissue; 3) in all the studied periods (7, 14 and 28 days), the histometric analysis revealed larger bony neoformation in the animals of the group 1 (control group)...(Complete abstract click electronic access below)
Mestre
PESSOA, Wagner Soares. "Avaliação do elixir sanativo® sobre o processo de alveolite dental induzida em ratos (Rattus norvegicus albinus)." Universidade Federal de Pernambuco, 2008. https://repositorio.ufpe.br/handle/123456789/8840.
Full textUniversidade Federal do Piauí
Alveolite é um processo inflamatório que envolve as porções ósseas mais superficiais do alvéolo dentário. Para possibilitar uma avaliação do mecanismo de alveolite de extração dental em ratos machos tratados com Elixir Sanativo®, através de exame histológico com o auxílio de microscopia de luz, foram utilizados 36 ratos (Rattus norvegicus albinus) Wistar. Os animais foram anestesiados com quetamina (10 mg/Kg de peso) + xilazina (0,5 mg/Kg de peso), submetidos a extração do incisivo superior direito e subseqüente alveolite dental, através da introdução de chumaço de algodão com adrenalina 1: 1000 durante 15 minutos. Comprovada a alveolite dental, após 48 horas os animais foram divididos em dois grupos: I os que receberam água (controle) e II, tratado com Elixir Sanativo® na dose de 4,1 mg/mL administrado na água de beber. Cada grupo foi subdividido em 3 subgrupos A, B e C, correspondendo ao 6º; 15º e 21º dia de alveolite dental, respectivamente. Os espécimens foram fixados em formol a 10% por 24 horas, descalcificados e processados convencionalmente para microscopia óptica comum. A cicatrização alveolar procedeu-se mesmo diante da alveolite dental, ocorrendo discretamente no grupo IIA, mais desenvolvida no grupo IIB e comparável aos achados normais no grupo IIC quando comparados com o grupo controle. Os melhores resultados foram obtidos com 21 dias de tratamento
Miranda, Rosa de Fatima Silva de. "Avaliação cronologica da cicatrização alveolar atraves de radiografias em humanos voltada para o intersse pericial." [s.n.], 1995. http://repositorio.unicamp.br/jspui/handle/REPOSIP/288330.
Full textDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
Made available in DSpace on 2018-07-21T18:48:48Z (GMT). No. of bitstreams: 1 Miranda_RosadeFatimaSilvade_M.pdf: 2981777 bytes, checksum: 773d95c91d3c5a9a54c8b2ac36e3d4cf (MD5) Previous issue date: 1995
Resumo: A cicatrização dos alvéolos dentários, resultantes de exodontias, se realizam numa sequência cronológica que nos permite estimar o tempo decorrido entre a data da extração e a fase de cicatrização alveolar, em pessoas vivas ou em cadáveres, que apresentam ausência de elementos dentários. No presente trabalho, utilizamos uma amostra de 20 pacientes, de ambos os sexos, na faixa etária de 19 a 50 anos, que se submeteram a intervenções exodônticas com controle radiográfico de 8 dias, até a cicatrização total que, em apenas um caso, atingiu 273 dias. Concluímos que há uma seqüência cronológica da cicatri~ação alveolar, demonstrando que os alvéolos do arco dentário superior possuem um período de cicatrização mais acelerado que os inferiores. Verificamos, também, que não houve diferenças significantes na cicatrização alveolar entre os sexos. Foram, ainda, determinadas, estatísticamente, duas funções matemáticas para os arcos dentários superior e inferior, a fim de se calcular o tempo decorrido entre a extração do dente e o nível de cicatrização alveolar
Abstract: Chronological evaluation of alveolar healing, using radiographs in humans, tumed to investigation interest. Dental alveolar healing, resulted of tooth extractions, develops in a chronological sequence which allows to estimate the time went on between the date of the tooth extraction and the phase of alveolar healing in live people and corpses that show tooth absence. In the present study, we used a sample of 20 subjects of both sex, aged among 19 and 50 years old that were submitted to tooth extractions with radiographic control of 8 days, until the complete alveolar healing, that only in a single case achieved 273 days. We conclude that there ar~ a chronological sequence of alveolar healing, showing that the alveolus of superior dental arch had a more accelerated healing period that there was not significant difference about the alveolar healing between the sexo There were still determined statistical date, assessing varjance, regression and correlation analysis and two mathematical functions to the superior and inferior dental arches, with the purpose of calculate the time passed between the tooth extraction andthe time passed between the tooth extraction and the levei of alveolar heaJing
Mestrado
Odontologia Legal e Deontologia
Mestre em Ciências
Souza, Júnior José Moisés de. "O efeito dos extratos de semente de uva e semente de toranja na cicatrização alveolar." reponame:Repositório Institucional da UFSC, 2017. https://repositorio.ufsc.br/xmlui/handle/123456789/176804.
Full textMade available in DSpace on 2017-06-27T04:23:10Z (GMT). No. of bitstreams: 1 346669.pdf: 995587 bytes, checksum: 8054493fca8cb8f53ef8943c197bf95d (MD5) Previous issue date: 2017
Objetivos: Produtos naturais podem levar a alterações nos parâmetros dos tecidos moles e mineralizados, devido ao seu efeito sobre as células e matriz extracelular. Foram investigados os efeitos de dois suplementos dietéticos nos fatores de crescimento, inflamatórios e de coagulação e também o osso recém-formado em alvéolo de extração de humanos. Métodos: Este estudo teve aprovação institucional para pesquisa em seres humanos da Comissão Nacional de Ética em Pesquisa. Os indivíduos tomaram 300 mg 3 vezes ao dia de extrato de semente de uva [GEU] ou extrato de semente de toranja [GTO], iniciando duas semanas antes da extração dentária e mantendo esse regime por sessenta dias (n = 10 por grupo). Dentes com indicação de extração foram removidos e os alvéolos preenchidos com uma esponja de colágeno e suturados. Após 24 h, recolheu-se uma amostra do alvéolo, extraiu-se RNA com TRIzol e converteu-se em cDNA. Reação de transcriptase reversa seguida de reação em cadeia da polimerase quantitativo (qRT-PCR) foi realizada para TGFß-1, VEGF, PDGF, BMP-4, BMP-7, RUNX-2, IL1-ß, CXCL2, IL-6, VWF e F2 trombina. Sessenta dias após a extração do dente, foi obtido uma amostra óssea do local antes da colocação do implante dentário, fixado em formalina tamponada a 10% e desmineralizado por EDTA 0,5 M com pH 7,6. As amostras foram incorporadas em parafina, seccionadas e coradas em hematoxilina e eosina (H&E) para morfologia, picrosirius red (PSR) para avaliar a organização/maturação de colágeno e fosfatase ácida resistente ao tartarato (TRAP) para contagem de osteoclastos. Resultados: qRT-PCR revelou que o grupo GTO apresentou uma diminuição estatisticamente significante nos fatores de crescimento TGFß-1 e PDGF e nos marcadores inflamatórios IL1-ß, CXCL2 e IL-6. GEU mostrou um aumento no fator de coagulação VWF. As análises histológicas mostraram uma clara diminuição da densidade do colágeno, maturação óssea, densidade osteoclástica aumentada e presença abundante de plaquetas e tecido conjuntivo frouxo no grupo GEU. Conclusão: Houve um impacto significativo de suplementos dietéticos específicos na cicatrização de alvéolos de extração com diminuição dos marcadores inflamatórios em GTO e formação óssea atrasada observada em GEU. São necessários outros estudos nesta linha de pesquisa, para que se possa compreender adequadamente as modificações que ocorrem nos alvéolos de extração em pacientes que fazem o uso de suplementos alimentares.
Abstract : Objectives: Natural products could lead to altered soft and mineralized tissue parameters due to their effect on cells and extracellular matrix. We investigated the effects of two dietary supplements on growth, inflammatory and coagulation factors and newly formed bone in extraction sockets in humans. Methods: This study had institutional approval for human subjects research from the Comissão Nacional de Ética em Pesquisa. Subjects took 300 mg t.i.d. of Grape Seed Extract [GEU] or Grapefruit Seed Extract [GTO] starting two weeks prior to dental extraction and maintained this regimen for sixty days (n=10 per group). Non-restorable teeth were extracted and sockets filled with a commercially available collagen patch and sutured. After 24 h, a socket sample was collected, RNA extracted with TRIzol and converted into cDNA. Quantitative real time PCR (qRT-PCR) was performed for TGFß-1, VEGF, PDGF, BMP-4, BMP-7, RUNX-2, IL1-ß, CXCL2, IL- 6, VWF and thrombin. Sixty days after tooth extraction, a central core was obtained from the site prior to dental implant placement, fixed in 10% buffered formalin and demineralized by 0.5 M EDTA pH 7.6. Samples were embedded in paraffin, sectioned and stained in hematoxylin and eosin (H&E) for morphology, picrosirius red (PSR) for evaluation of the organization/maturation of collagen and tartrate resistant acid phosphatase (TRAP) for osteoclast count. Results: qRT-PCR revealed that the GTO group had a statistically significant decrease in the growth factors TGFß-1 and PDGF and in the inflammatory markers IL1-ß, CXCL2 e IL-6. GEU showed an increase in the coagulation factor VWF. Histological analyses showed a clear decrease in collagen density, bone maturation, increased osteoclast density and abundant presence of platelets and loose connective tissue in GEU group. Conclusions: There was a significant impact of specific dietary supplements in healing of extraction sockets with decreased inflammatory markers with GTO and delayed bone formation observed with GEU. Further studies are needed in this line of research to adequately understand the changes occurring in extraction sockets in patients using dietary supplements.
ARAÚJO, Flávia Regina Gonçalves de. "Resposta bacteriológica e histológica em processo de alveolite em ratos (Rattus norvegicus albinus) tratados com Mercurius solubilis." Universidade Federal de Pernambuco, 2006. https://repositorio.ufpe.br/handle/123456789/8541.
Full textCoordenação de Aperfeiçoamento de Pessoal de Nível Superior
O objetivo deste estudo foi observar a resposta bacteriológica e histológica nos processos de alveolite em ratos Wistar machos tratados com Mercurius solubilis 12 CH. Os animais foram anestesiados com quetamina (10 mg/kg de peso) + xilazina (0,5 mg/kg de peso), submetidos à extração do incisivo superior direito e subseqüente alveolite, perfazendo, inicialmente, 3 grupos: I água (controle), II - Mercurius solubilis 12 CH 0/20 mL (placebo) e III - Mercurius solubilis 12 CH. Posteriormente, estes grupos foram divididos em 3 subgrupos: A, B e C, correspondendo ao 6o, 15o e 21o dia de alveolite, respectivamente. A microbiota oral foi coletada através de swab em BHI para semeio e bacterioscopia. Após o semeio, as placas de Petri foram incubadas a 37°C por 48 horas. Para o exame histológico, os espécimens foram fixados em formol a 10% por 24 horas, descalcificados e processados para microscopia de luz. Observaram-se alterações quantitativas e qualitativas da microbiota oral ao compararem-se os grupos após extração e alveolite. Os grupos I e II apresentaram maior surgimento de bactérias patogênicas, enquanto o grupo III conservou a microbiota com as características mais próximas da normal. O Mercurius solubilis 12 CH não apresentou atividade bactericida, porém conservou a microbiota dentro dos parâmetros de normalidade. A cicatrização alveolar procedeu-se mesmo diante da alveolite, ocorrendo discretamente no grupo I, mais desenvolvida no grupo II e comparável aos achados normais no grupo III. Tanto do ponto de vista bacteriológico quanto histológico, os melhores resultados foram obtidos após 21 dias de tratamento com o Mercurius solubilis 12 CH
Bergoli, Roberta Dalmolin. "Efeito da isotretinoína no reparo alveolar após exodontia: estudo em ratos." Pontifícia Universidade Católica do Rio Grande do Sul, 2009. http://hdl.handle.net/10923/504.
Full textThe objective of this study was to evaluate the effects of daily intake of isotretinoin in standard therapeutic doses (7,5mg/kg) for cystic acne vulgaris’ treatment on the alveolar repair after extraction of upper incisors, in rats. Thirty two male Wistar rats were used, with medium age of 60 days, that were allocated in the Control group (CG= 12 rats) and in the Experimental group (EG= 20 rats). Each group was subdivided in 4 subgroups according to 7, 21, 28 and 90 days’ periods in which they were euthanasied after surgery. All animals from experimental group received daily doses of isotretinoin during a period of 30 days before surgery. After this period, the extractions were carried out and animals continued to receive the medication until the respective day of sacrifice. All animals from experimental group were submitted to a peripheral blood collection through orbital venous plexus to analysis of calcium serum level before beginning the use of the medicine and at the time of euthanasia. The obtained operatory pieces (maxilla) were processed and, submitted to histological sections of 6 μm thickness, and staining in HE. Histological slides were submitted to descriptive microscopic analysis, under light microscopy. Results showed that there was an acceleration in alveolar repair process among all rats from experimental group (7, 21, 28 e 90 days), when compared to respective control groups. Calcium serum levels had a decrease statistically significant between 1st and 2nd blood collections in groups 21, 28 and 90 days. Based on results, it was possible to conclude that all animals from experimental group presented a more accelerated alveolar healing compared to animals from corresponding control groups, indicating that isotretinoin accelerated the repair.
O objetivo deste estudo foi avaliar os efeitos da administração diária de 7,5 mg/Kg de isotretinoína por via oral, para o tratamento de acne vulgar cística sobre o reparo alveolar após exodontia de incisivos superiores, em ratos. Foram utilizados 32 ratos machos (Wistar), com idade média de 60 dias que foram distribuídos em grupo Controle (12 ratos) e grupo Experimental (20 ratos). Cada grupo foi dividido em quatro subgrupos de acordo com os períodos de observação em 7, 21, 28 e 90 dias após a extração. Os animais do grupo experimental receberam doses diárias de isotretinoína por um período de 30 dias antes da cirurgia. Após este período, foram realizadas as extrações e os animais continuaram a receber a medicação até os respectivos dias das eutanásias. Os animais do grupo experimental foram submetidos à coleta de sangue periférico através do plexo venoso orbital para análise do nível sérico de cálcio antes de iniciarem uso da medicação e no dia da eutanásia. As peças operatórias obtidas (hemimaxila direita) foram processadas, submetidas aos cortes histológicos de 6μm de espessura, e coradas em HE. As lâminas histológicas foram analisadas de forma descritiva sob microscopia de luz. Os resultados mostraram que houve uma aceleração no processo de reparo alveolar no grupo experimental, em todos os períodos (7, 21, 28 e 90 dias), quando comparados aos seus respectivos grupos controles. O nível sérico de cálcio teve uma diminuição estatisticamente significativa entre a 1º e a 2º coleta de sangue nos grupos de 21, 28 e 90 dias. Com base nos resultados, foi possível concluir que os animais do grupo experimental mostraram uma cicatrização alveolar mais acelerada do que os animais do grupo controle, indicando que a ingestão diária de isotretinoína em dose correspondente para o tratamento de acne cística acelerou o reparo alveolar.
Coutinho, Carolina Chiantelli Cláudio [UNESP]. "Expressão das proteínas osteoprotegerina, RANK e RANKL durante o processo de reparo alveolar em ratos: estudo imunoistoquímico." Universidade Estadual Paulista (UNESP), 2005. http://hdl.handle.net/11449/88947.
Full textFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Na dinâmica da reparação óssea os fenômenos de reabsorção e neoformação são dependentes e acoplados. Proteínas efetivamente envolvidas na diferenciação celular determinam ativação ou inibição das atividades que regulam o ganho ou perda de massa óssea. Dentre as proteínas ósseas identificadas e envolvidas na dinâmica óssea podemos destacar a OPG, a RANK e RANKL como marcadores de atividades celulares. O presente trabalho tem como objetivo identificar, nos diferentes períodos da cronologia do processo de reparo alveolar através de técnica imunoistoquímica, a presença das proteínas OPG, RANK e RANKL. Para tanto foram utilizados 60 ratos machos submetidos à exodontia do incisivo superior direito e perfundidos aos 14, 21 e 28 dias pós-operatórios. As hemi-maxilas contendo o alvéolo dental em reparação foram removidas, pósfixadas, descalcificadas em EDTA, crioprotegidas e obtidos cortes longitudinais com 14æm em criostato. Os cortes foram submetidos à reação imunoistoquímica mediante a utilização de anticorpos primários para OPG, RANK e RANKL, como amplificador foi utilizado o sistema avidina-biotina e a diaminobenzidina (DAB) como cromógeno. Os resultados mostram que qualitativamente ocorre um balanço na expressão das proteínas que caracterizam reabsorção e neoformação óssea nos diferentes períodos estudados, onde aos 14 e 21 dias ocorre maior expressão de RANK. Com relação às proteínas OPG e RANKL, observa-se que elas apresentam-se expressas nas células da linhagem osteoblástica de forma similar, sendo que 28 dias é o período de maior expressão destas proteínas.
In the bone healing dynamics, the resorption and neoformation processes are dependent. Proteins involved in the cellular differentiation determinate the activation or inhibition of the activities that regulate the gain or loss of bone mass. From all of the identified bone proteins, it may be distinguished the OPG, RANK and RANKL. The present study has the aim to identify, in the different periods of alveolar bone healing chronology, the expression of OPG, RANK and RANKL proteins using the immunohistochemistry methodology. To perform this study, 60 male rats had the right upper incisive extracted and they were perfused at 14, 21 and 28 pos-operative days. The hemimaxilla with the rat extraction socket was removed, pos fixed and decalcified in EDTA. Then, they were cryoprotected and longitudinal slices with 14 ìm thickness were obtained in cryostat. The slices were submitted to immunohistochemistry reaction and the primary antibodies used were against OPG, RANK and RANKL proteins. It was used the avidinbiotin system to amplify the sign and diaminobenzidine was the cromogen. The results show that there is a balance in the expression of the proteins, showing that there is an increase in the expression of RANK at 14 and 21 pos-operative periods. In relation to OPG and RANKL, these proteins presents a similar expression in all of the pos-extraction periods analysed in this study and at 28 days after the extraction there is the greater expression of both proteins.
Llanos, Alexandre Hugo. "Comparação das alterações dimensionais do rebordo alveolar pós-exodontia entre a técnica de preservação alveolar com a utilização de substituto ósseo xenógeno e a cicatrização espontânea: ensaio clínico aleatório." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/23/23146/tde-04042018-112542/.
Full textThe healing process of post-extraction sockets is bone resorption. After tooth extraction, spontaneous healing will lead to loss of volume and shape of the original ridge. Alveolar ridge preservation involves any procedure that limits the effects of post-extraction resorption. The objective of this study was to evaluate the use of the xenogenic bone substitute in the post-extraction alveolar preservation compared to spontaneous healing in anterior maxilla teeth with vestibular wall defects greater than 50%. Thirteen patients with anterior maxillary tooth extraction with a > 50% buccal wall loss were treated. All the surgeries were made flapless. Patients were randomly assigned to a test group: alveolar preservation with bone substitute (7 participants); and control group: spontaneous healing (6 participants). The primary outcome was the dimensional alteration of the alveolar ridge calculated between the tomographic images at the beginning (post-extraction) and after 4 months of the intervention, at the thickness 1mm below the coronal portion of the crest (HW-1). Secondary outcomes were measures buccal and palatine, and HW-3 and HW-5 cross-sections. The HW-1 measure reduced 51.21% in the test group and 82.80% in the control group, with a statistically significant intergroup difference of 31.59%. For the other horizontal measurements, there was a statistically significant reduction for both HW-3 and HW-5 between the two groups. In sockets with buccal wall loss greater than 50%, the use of the bone substitute provided a 30% lower horizontal loss.
Silva, Jordan Lima da. "Análise comparativa entre o sistema digital Digora e a digitalização da radiografia convencional na avaliação da densidade radiográfica do processo de reparo alveolar /." Araçatuba, 2005. http://hdl.handle.net/11449/101043.
Full textAbstract: Conventional radiographic film It is a technology that the surgeon-dentists more are made familiar being comfortable to in terms of the technique and the interpretation. The digital x-ray is an advance that is being adopted slowly for the dentistry. The digital image incorporates computer science in the captation, the exposition, the distinction, and the storage of the direct radiographic images. The digital image offers some distinct advantages on the film, but as all the emergent technology presents new different challenges and so that the users surpass them. The intention of this study was to evaluate through the radiograpic examination for the Digora system the radiographic density of the behavior of the fabric bone during the process of repair in the region of molar enclosed inferiors after exodontia in human beings. Standardized procedures had been used for the surgery of the patients as well as for the attainment of the radiographic images. Bone suggestive fabric image mineralized was observed in the periods of 60 and 90 days comparing the conventional and digital method. The gotten results allow to conclude that the quality of the digital conventional image is lower efficient than the digital one gotten directly for the accompaniment of the postoperative bone repair.
Orientador: Wilson Roberto Poi
Coorientador: Gilberto Aparecido Coclete
Doutor
Almeida, Júnior Paulo [UNESP]. "Influência de três hemostáticos tópicos no processo de reparo em feridas de extração dental: análise histológica e histométrica em ratos." Universidade Estadual Paulista (UNESP), 2004. http://hdl.handle.net/11449/88932.
Full textCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
A hemorragia após extração dental constitui-se em uma das complicações mais freqüentes na prática da cirurgia oral. Devido à dificuldade para se exercer manobras como pinçamentos e ligaduras de vasos neste tipo de hemorragias, existe a possibilidade do preenchimento do alvéolo com materiais hemostáticos de ação tópica. O propósito deste estudo foi analisar a influência de três hemostáticos tópicos (Hemostop®, Pro Tape® e ViscoStat®) na cronologia do processo de reparo em feridas de extração dental por meio de uma análise histológica e histométrica. Para tanto foram utilizados 60 ratos (Wistar) machos divididos em quatro grupos de 15 animais cada. Todos os animais foram submetidos à extração do incisivo central superior direito, seguido ou não da colocação de agente hemostático entre o terço médio e apical do alvéolo dental, e posterior sutura com fio reabsorvível. Em grupos de cinco, os animais foram sacrificados aos 7, 14 e 28 dias pós-operatórios por inalação excessiva de éter sulfúrico. Suas maxilas foram separadas, fixadas em formalina, descalcificadas em EDTA e incluídas em parafina. Foram realizados cortes de 6 æm de espessura e corados com Hematoxilina e Eosina, e Tricrômio de Masson. Após a análise histológica, em microscópio óptico; e histometria óssea, com o software ImageLab, os resultados foram submetidos ao teste não-paramétrico de Kruskal-Wallis. Pela metodologia aplicada foi possível concluir que: 1) houve atraso na cronologia do processo de reparo alveolar em todos os grupos tratados; 2) os materiais analisados provocaram intensa reação inflamatória no tecido adjacente; 3) em todos os períodos estudados (7, 14 e 28 dias), a análise histométrica revelou maior neoformação óssea nos animais do grupo 1 (controle). No entanto, a análise estatística constatou diferença significante (p<0,05) somente no 70 dia,...
The hemorrhage after dental extraction is one of the most frequent complications in practice of the oral surgery. Due to the difficulty to exercise maneuvers as arrestty and ligature of blood vessel in this type of hemorrhages, exists the possibility of the filling of the alveolus with hemostatics materials of topical action. The purpose of this study was to analyze the influence of three topical hemostatics (Hemostop®, Pro Tape® and ViscoStat®) in the chronology of the repair process in wounds of dental extraction through a histologic and histometric analysis. For such, 60 male's rats (Wistar) were used divided in four groups of 15 animals each. All the animals were submitted to the extraction of the right superior central incisor, followed or not of the placement of hemostatics agent among the medium and apical third of the dental alveolus, and subsequent suture with reabsorble filament. In groups of five, the animals were sacrificed to the 7, 14 and 28 postoperative days by excessive inhalation of sulfuric ether. Your maxillaries were separate, fixed in formalin solution, decalcified in EDTA and included in paraffin. Cuts of 6 æm of thickness were accomplished and stained with hematoxylin and eosin, and Masson's trichromic. After the histologic analysis, in optical microscope; and histometric bony, with the software ImageLab, the results were submitted to the no-parametric test of Kruskal-Wallis. For the applied methodology it was possible conclude that: 1) there was delay in the chronology of the alveolar repair process in all the treated groups; 2) the analyzed materials instigated a intense inflammatory reaction in the adjacent tissue; 3) in all the studied periods (7, 14 and 28 days), the histometric analysis revealed larger bony neoformation in the animals of the group 1 (control group)...(Complete abstract click electronic access below)
Mandetta, Carolina de Moraes Rego. "Efeito da terapia fotodinâmica antimicrobiana na descontaminação de alvéolos infectados previamente a instalação de implantes imediatos e na cicatrização de alvéolos pós-extração com ou sem material de enxerto. Estudo histomorfométrico e microtomográfico em cães." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/58/58132/tde-17052018-165020/.
Full textAlveolar bone resorption following tooth loss is an inherent condition of the natural healing process. Therefore, several techniques, such as immediate implants placement and post extraction socket preservation, have been suggested in order to limit the adverse changes suffered by the alveolar process. However, extraction sockets commonly results from the removal of teeth affected by chronic infection, which conventionally contraindicates immediate bone graft and implant placement unless meticulous wound debridement and alveolar irrigation associated to a suitable pre- and post-operatory antibiotic protocol are employed. Alternatives ought to be tested in order to substitute the indiscriminate use of systemic antibiotic therapy. The aim of the present study was to evaluate the effect of the antimicrobial photodynamic therapy (aPDT) in the decontamination of infected post extraction sockets, previously to immediate implant placement and in the healing of post extraction sockets associated or not to xenografts. In the first phase, periodontitis was induced with ligatures in the mandibular premolars of eight beagle dogs. After 2 months, in the second phase of the study the dogs had their mandibular bicuspids bilaterally extracted, and randomly one hemi-mandible was decontaminated by mechanic debridement associated to saline solution irrigation (Control Group - CG), and the other hemi-mandible was decontaminated with mechanic debridement and saline solution irrigation associated to antimicrobial photodynamic therapy (Test Group - TG). Thereafter, 3 immediate implants in each side of the mandible were placed and the following groups were devised: TG-I (Test Group - Implant) and CG-I (Control Group - Implant). The remaining sockets were used for the study of the healing dynamic. The sockets were randomly assigned to the following groups: Test Group - Blood clot (TG-BC), Test Group Bio- Oss® (TG-BO), TG - BOC (Test Group Bio-Oss® Collagen), Control Group - Blood Clot (CG-BC), Control Group - Bio-Oss® (CG-BO) and Control Group - Bio-Oss® Collagen (CG-BOC). After 12 weeks, the dogs were sacrificed and the specimens were processed for microtomographic, histological and histomorphometric analysis. When the post extraction healing process was evaluated, the aPDT decontaminated sockets (TG-BC, TG-BO and TG-BOC) presented better numerical results in comparison to both buccal bone crest height (BCL) and in the bucco-lingual dimension (BLD). However, there were no statistically differences among the groups for these parameters in the histomorphometric analysis. Only the BCL measured in the two-dimensional microtomographic analysis showed statistic better results in the TG-BC when compared to the CG-BC. In the evaluation of the immediate implant placement the histomorphometric analysis presented statistically better results for the TG-I in the bone-implant contact (BIC), as well as in the vertical buccal bone loss (VBBL). The bone density (BD) was numerically better in the TG-I than in the CG-I. Both two-dimensional (VBBL) and three-dimensional (bone volume BV, percentage of the total bone volume - BV/TV, bone surface density - BS/TV, trabecular thickness Tb.Th, trabecular separation Tb.Sp and trabecular number TB.N) microtomographic analysis showed statistically better results in the TG-I. The aPDT showed potential in the decontamination of infected post extraction sockets previously to immediate implant placement and in the healing of post extraction sockets associated or not to xenogeneic grafts, without the use of systemic antibiotics.
Silva, Jordan Lima da [UNESP]. "Análise comparativa entre o sistema digital Digora e a digitalização da radiografia convencional na avaliação da densidade radiográfica do processo de reparo alveolar." Universidade Estadual Paulista (UNESP), 2005. http://hdl.handle.net/11449/101043.
Full textCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
A película radiográfica é uma tecnologia que os cirurgiões-dentistas estão mais familiarizados estando confortáveis em termos da técnica e da interpretação. A radiografia digital é um avanço que está sendo adotado lentamente pelo cirugião-dentista, oferecendo algumas vantagens distintas sobre a película. O propósito deste estudo é comparar o sistema radiográfico digital Digora com a digitalização da radiografia convencional, avaliando a densidade radiográfica do processo de reparo alveolar na região de molares inferiores inclusos após exodontia em humanos. Os princípios e técnica para a exodontia foram padronizados assim como para a obtenção das imagens radiográficas. Imagem sugestiva de tecido ósseo mineralizado foi observada nos períodos de 60 e 90 dias, comparando os sistemas digital e convencional digitalizado. A estatística sugere perda nos valores da densidade, nos períodos estudados, para o sistema das radiografias convencionais digitalizadas em relação ao sistema Digora. Os resultados obtidos permitem concluir que a qualidade da imagem convencional digitalizada é menos precisa quando comparada a digital, para o acompanhamento do reparo ósseo pós-operatório.
Conventional radiographic film It is a technology that the surgeon-dentists more are made familiar being comfortable to in terms of the technique and the interpretation. The digital x-ray is an advance that is being adopted slowly for the dentistry. The digital image incorporates computer science in the captation, the exposition, the distinction, and the storage of the direct radiographic images. The digital image offers some distinct advantages on the film, but as all the emergent technology presents new different challenges and so that the users surpass them. The intention of this study was to evaluate through the radiograpic examination for the Digora system the radiographic density of the behavior of the fabric bone during the process of repair in the region of molar enclosed inferiors after exodontia in human beings. Standardized procedures had been used for the surgery of the patients as well as for the attainment of the radiographic images. Bone suggestive fabric image mineralized was observed in the periods of 60 and 90 days comparing the conventional and digital method. The gotten results allow to conclude that the quality of the digital conventional image is lower efficient than the digital one gotten directly for the accompaniment of the postoperative bone repair.
Roso, Melissa. "O potencial terapêutico da tecnologia PRGF na cicatrização dos tecidos moles após extração dentária." Master's thesis, 2017. http://hdl.handle.net/10284/6120.
Full textPRGF technology is based on the detailed study of the use, formulation and activation of a platelet-rich autogenic preparation with the main characteristic of easy use and biocom-patibility. The deep study of the intrinsic properties of platelets, together with a protocol with platelet concentration, activation and kinetic release, allowed the development of a very ver-satile technology with enormous therapeutic potential. The objective of the present study was to review the literature to demonstrate that PRGF presents promising results during the tissue healing process, showing a lower mean value of pain, facial edema, greater alveolar volume residual, attesting its regenerative abili-ties, indicating this therapy as a possible way to improve postoperative morbidity rates after dental extraction.
Nunes, Sílvia Mariana Vila. "Resultados comparativos da utilização de pilares de cicatrização customizados em implantes imediatos pós extração maxilares." Master's thesis, 2020. http://hdl.handle.net/10400.14/31076.
Full textIntroduction: After a single-tooth extraction, physiological remodeling processes are unavoidable which leads to a total loss of the periodontal ligament and resorption of the bundle bone. Immediate implant placement (IIP) associated with the use of bone substitutes and collagen matrices seems to reduce the amount of resorption at periimplant areas. Recently, customized healing abutments appeared as another solution to seal the socket and preserve the original soft tissue contour. The aim of this study is to compare the clinical differences reported during the first year of treatment between two types of alveolar sealing, when used with immediate implants in the aesthetic area. Materials and Methods: The present study was designed as a prospective, randomized, controlled clinical trial with a parallel-group design. Patients treated with single-tooth maxillary implants after atraumatic flapless extraction, between 15 and 25, were allocated into two groups regarding a different type of socket sealing: Group I received a collagen matrix and group II was treated with a customized healing abutment. Digital impressions were taken prior to extraction (T0), one month (T1), four months (T2) and 12 months (T3) after implant insertion. The digital files were superimposed with computer software allowing to evaluate volumetric changes between different time points at peri-implant tissue areas like Buccal Volume Variation (BVv) and Total Volume Variation (TVv). Mucosa variation between T0 and T3 was digitally computed assessing the papilla presence at mesial (MPHv) and distal (DPHv) sites and the mucosa height (MGHv). Mean values were compared and statistical significance was set at 0,05. Results: Twenty-eight patients (mean age 54,00+/-12,20 years), fourteen in each group, were evaluated after a 12-month period. No complications occurred in all included patients during the follow-up periods. Significant differences between mean values of BVv at T1 (p=0,043) were observed at the Group I and Group II (-9,75+/-6,65% and -4,76+/-5,29%, respectively). Also, during the first month of treatment, TVv appeared as statistically significant (p=0,021) showing a variation of -8,90+/-5,03% at Group I and -4,17+/-4,52% at Group II. At one-year follow-up, no significant differences were found in terms of volume variation between the two groups. Regarding mucosa variation, only mean values of MPHv exhibited significant differences (p=0,048), observing a variation of -0,47+/-0,38mm at Group I and -0,24+/-0,18mm at Group II. Conclusion: Both treatment modalities showed a predictable socket sealing option in maxillary immediate implant placement yet failed to prevent volume tissue loss on periimplant areas. At the first month of treatment, customized abutments presented less volume variation, although no differences could be assessed at the 1-year follow up.
Brito, Maria Leonor Albuquerque Figueiredo da Costa. "Caracterização da mucosa alveolar como factor de previsibilidade na preservação óssea alveolar após extracção dentária : um novo método de classificação." Master's thesis, 2015. http://hdl.handle.net/10400.14/19541.
Full textAfter tooth extraction, dimensional changes occur in the alveolar bone, related to cellular healing which inevitably leads to bone resorption. These changes must be known and properly evaluated before surgery and prosthetic rehabilitation. A group of 12 patients underwent post-extraction evaluation in Oral Surgery appointment at the University Dental Clinic of the Catholic University of Portugal in Viseu. In each patient was extracted, by flapless technique, a single maxillary tooth, with the requirement of the presence of adjacent teeth, located in region between the tooth 15 and 25, with indication for extraction. Inclusion and exclusion criteria were defined, and all patients with a systemic disease or local factors that enhance bone resorption were excluded. The vertical and horizontal bone dimensional changes were evaluated for each gingival group, previously set, in three different times, at the time of extraction (Baseline), 1 month after extraction (T1) and 3 months after extraction (T2). The results were predictable, according to the bibliography, checking whether there has vertical and horizontal bone loss, over the three months, were severe in the gingival group G1 and less pronounced in G3. It has been found that there is a strong correlation between loss of vertical bone volume and thickness of attached gingiva.
Campos, Carolina Costa da Fonseca Lacerda. "Alterações da mucosa no processo de remodelação óssea alveolar após extração dentária." Master's thesis, 2015. http://hdl.handle.net/10400.14/18758.
Full textDental extraction is a procedure which necessarily damages the surrounding tissues of the tooth, including the peri-alveolar mucosa. At the end of dental extraction, the Dentist must assure the decontamination and debridement of the wound and promote it’s healing by hemostasis, with or without suture ligation. Alveolar bone and wound repair involves certain healing stages that differ between them. The aim of this study was the evaluation of the clinical changes of the perialveolar mucosa during the process of post-extractional bone healing in the verbal consultation of Oral Surgery of the University Clinic of the Portuguese Catholic University – Viseu. The study included patients with indication for dental extraction, due to caries or fracture, on the anterior sector (1.5 to 2.5), between November 2014 and April 2015. Distinct assessment moments were considered: moment of extraction (baseline), 1 month after tooth extraction (T1) and 3 months after tooth extraction (T2). The evaluated clinical parameters were changes in attached gingiva height, gum level, vestibule-palatine bone width and bone crest level. All collected information, as well as statistical findings of this project, will be relevant to Dentists in relation to changes in the mucosa which may be expected in matters of esthetic reabilitations of the anterior sector. The results were registered and subjected to statistical treatment using Office Excel 2013 (Microsoft ® Seattle, WA, EUA).
Gómez, Ortiz Josefa. "Linear and volumetric analysis on the effect of a customized healing abutment at maxillary immediate implant sites." Master's thesis, 2021. http://hdl.handle.net/10400.14/34388.
Full textIntroduction The placement of immediate post-extraction implants is a frequent treatment modality in clinical practice, and the processes that are involved in the healing of the alveolar are being investigated, taking into account that the inevitability of physiological remodeling phenomena after tooth extraction can result in significant changes in alveolar bone. The aim of this study is to compare the clinical differences determined through tissue changes between two types of alveolar sealing after placement of an immediate implant in the maxillary arch over two years of treatment. Materials and Methods The present study followed a methodology of prospective, controlled, randomized clinical study with parallelism of test groups. The treatment protocol was randomly divided according to the alveolus closure technique used. Thus, in group I, patients who had the post-extractional alveolus sealed with a reabsorbable matrix of collagen sutured through a simple suture interrupted with polyamide thread 6/0 to the adjacent alveolar mucosa were allocated; patients in group II received a customized healing abutment, without the need for sutures. All patients were rehabilitated prostheticly and provisionally, with Maryland crown type. Ten days after the surgical procedure, the sutures of group I were removed and scheduled the postoperative controls, which included visits to one (T1), four (T2), twelve (T3) and twenty-four (T4) months after implant insertion. The digital models of the arch in question corresponding to T1, T2, T3 and T4 were exported from the intraoral optical scanner software used in STL format and imported into the computer program, following the analysis protocol of already published models. The mean values were compared and the statistical significance was established at 0.05. Results Thirty-four patients participated in this study, with a mean age of 53.38±11.46 years. No patient was diagnosed with periodontal disease during the 24-month follow-up period. In group I, most tissue changes occurred during the first (T0-T1), fourth (T0-T2) and twelfth month of observation (T0-T3) in comparison with twenty-four months (T0-T4). These results are not significant to XII a 1 year of follow-up in relation to variations in linear measurements and volumetric measurements. Regarding the variation in vestibular volume, the alterations occurred in the two years of follow-up (T0-T4) individuals in group I had an average loss of -8.53%±6.51 and individuals in group II of -12.00%±7.09, with significant differences between the two groups. Conclusion The group of patients who received the collagen membrane had favorable results over the two years of treatment in the maintenance of peri-implant tissues in relation to the customized abutment.