Avaliação clínica e histológica de ratos submetidos à injeção em ventre lingual de ácido hialurônico em distintas concentrações
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional PUCRS |
Texto Completo: | http://hdl.handle.net/10923/395 |
Resumo: | Hyaluronic Acid (HA) is currently the most applied resorbable filling material. Its indiscriminate use has showed the adverse reactions. Scientific literature does not conclusively clarify the aetiology of the adverse effects, which can occur after material injection. The current research has aimed at evaluating, through clinical and histological analysis, local and systemic tissue response to the injection of 2 different hyaluronic acid concentrations in rat’s tongue. Fifty-four female Wistar rats (Rattus norvegicus) were randomically allocated into 3 groups according to the treatment (5. 5mg/mL HA, 25mg/mL HA and 0. 9 % NaCl - control) and 3 experimental times (7 days, 60 days and 90 days). Immediately before euthanasia, clinical analysis was performed guided by the parameters of presence and absence of inflammatory signs or any other alteration of the normal pattern. After euthanasia, the tongue and the right kidney of each animal were removed for microscopic analysis. Presence or absence of inflammatory reaction was measured in the tongue sections stained by hematoxylin and eosin (HE) and reactions were classified as mild, moderate or severe. The proportion of collagen fibers present was established in the sections stained with picrosirius. Presence or absence of inflammatory response in the total extension of each slide was observed in the kidney samples (HE). The clinical changes present were not statistically significant among groups (Kruskal-Wallis; p>0. 05). The groups that received HA injection presented a higher degree of inflammation if compared to the control groups in all monitoring periods (Kruskal-Wallis, p<0. 01). Regarding fibroplasias, the 25mg/mL HA group tended to form more collagen if compared to the control group (ANOVA Mixed Models; p=0. 016). In 100% of the analyzed kidney samples, there was no inflammatory reaction. According to the methodology used in this study, the obtained results allows the conclusion that (1) HA at 5. 5 and 25mg/mL presented variable and occasional clinic changes in all evaluation periods; (2) HA in the chosen concentrations, within 7 days, promoted a moderate degree of tissue inflammation; (3) After 60 and 90 days, inflammatory reaction surrounding HA particles became milder, reducing risks of adverse reactions to the material; (4) HA at 25mg/mL provoked larger concentrations of collagen if compared to the control group; (5) There was no inflammatory response and/or renal systemic migration due to the injection of HA at 5. 5mg/mL and 25mg/mL in up to 90 days of monitoring. |
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Borghetti, Ruchielli LoureiroFigueiredo, Maria Antonia Zancanaro de2011-12-27T14:14:08Z2011-12-27T14:14:08Z2011http://hdl.handle.net/10923/395Hyaluronic Acid (HA) is currently the most applied resorbable filling material. Its indiscriminate use has showed the adverse reactions. Scientific literature does not conclusively clarify the aetiology of the adverse effects, which can occur after material injection. The current research has aimed at evaluating, through clinical and histological analysis, local and systemic tissue response to the injection of 2 different hyaluronic acid concentrations in rat’s tongue. Fifty-four female Wistar rats (Rattus norvegicus) were randomically allocated into 3 groups according to the treatment (5. 5mg/mL HA, 25mg/mL HA and 0. 9 % NaCl - control) and 3 experimental times (7 days, 60 days and 90 days). Immediately before euthanasia, clinical analysis was performed guided by the parameters of presence and absence of inflammatory signs or any other alteration of the normal pattern. After euthanasia, the tongue and the right kidney of each animal were removed for microscopic analysis. Presence or absence of inflammatory reaction was measured in the tongue sections stained by hematoxylin and eosin (HE) and reactions were classified as mild, moderate or severe. The proportion of collagen fibers present was established in the sections stained with picrosirius. Presence or absence of inflammatory response in the total extension of each slide was observed in the kidney samples (HE). The clinical changes present were not statistically significant among groups (Kruskal-Wallis; p>0. 05). The groups that received HA injection presented a higher degree of inflammation if compared to the control groups in all monitoring periods (Kruskal-Wallis, p<0. 01). Regarding fibroplasias, the 25mg/mL HA group tended to form more collagen if compared to the control group (ANOVA Mixed Models; p=0. 016). In 100% of the analyzed kidney samples, there was no inflammatory reaction. According to the methodology used in this study, the obtained results allows the conclusion that (1) HA at 5. 5 and 25mg/mL presented variable and occasional clinic changes in all evaluation periods; (2) HA in the chosen concentrations, within 7 days, promoted a moderate degree of tissue inflammation; (3) After 60 and 90 days, inflammatory reaction surrounding HA particles became milder, reducing risks of adverse reactions to the material; (4) HA at 25mg/mL provoked larger concentrations of collagen if compared to the control group; (5) There was no inflammatory response and/or renal systemic migration due to the injection of HA at 5. 5mg/mL and 25mg/mL in up to 90 days of monitoring.O ácido hialurônico (AH) é o material de preenchimento estético reabsorvível mais empregado na atualidade. Seu uso indiscriminado tem frequentemente evidenciado reações indesejáveis nos usuários destes produtos. A literatura científica disponível não esclarece, de forma conclusiva, a etiologia dos efeitos adversos que podem ocorrer a partir da sua injeção. A presente pesquisa teve por objetivo avaliar, por meio da análise clínica e histológica, a resposta tissular local e sistêmica de duas concentrações de AH em língua de ratos. Cinquenta e quatro ratos fêmeos (Rattus norvegicus, Wistar) foram distribuídos em 3 grupos de tratamento (AH 5,5mg/mL, AH 25mg/mL e NaCl 0,9 % - controle) e 3 tempos experimentais (7 dias, 60 dias e 90 dias). Antes da eutanásia, procedeu-se a avaliação clínica, através de parâmetros de presença e ausência de sinais. Posteriormente, removeu-se língua e rim direito para análise microscópica. Nos cortes de língua corados por hematoxilina e eosina (HE), mensurou-se parâmetros de ausência ou presença de reação inflamatória, sendo esta classificada como leve, moderada ou severa. Nos cortes corados com picrosírius, estabeleceuse o percentual de fibras colágenas presentes. Nas amostras obtidas do rim (HE), foram observadas a presença ou ausência de resposta inflamatória em toda a extensão da lâmina. As alterações clínicas presentes não foram estatisticamente significativas entre os grupos (Kruskal-Wallis; p>0,05). Histologicamente, os grupos AH apresentaram maior grau de inflamação que os controles em todos os tempos do experimento (Kruskal-Wallis, p< 0,01). Quanto à fibroplasia, o grupo AH 25mg/mL tendeu a formar mais colágeno se comparado ao grupo controle (ANOVA Mixed Models; p=0. 016). Em 100% das amostras de rim analisadas, não se observou resposta inflamatória. A partir da metodologia utilizada neste estudo, os resultados obtidos permitem concluir que (1) O AH nas concentrações de 5,5 e 25mg/mL provocou alterações clínicas variáveis e ocasionais em todos os períodos; (2) O AH nas Atr 14 concentrações utilizadas, em até 7 dias, promoveu um grau moderado de inflamação tecidual; (3) A reação inflamatória circunjacente às partículas do AH diminuiu de intensidade entre 60 e 90 dias, reduzindo a possibilidade de reações adversas pelo uso do material; (4) O AH 25mg/mL suscitou maior formação de colágeno se comparado ao grupo controle; (5) Não houve resposta inflamatória e/ou migração sistêmica renal a partir da injeção do AH a 5,5mg/mL e 25mg/mL em até 90 dias de observação.Made available in DSpace on 2011-12-27T14:14:08Z (GMT). No. of bitstreams: 2 000431505-0.pdf: 2652734 bytes, checksum: 34930e0dc8e71cd2f8bedee48c925054 (MD5) license.txt: 581 bytes, checksum: 44ea52f0b7567232681c6e3d72285adc (MD5)Pontifícia Universidade Católica do Rio Grande do SulPorto AlegreODONTOLOGIAESTOMATOLOGIAHISTOLOGIAÁCIDO HIALURÔNICOAvaliação clínica e histológica de ratos submetidos à injeção em ventre lingual de ácido hialurônico em distintas concentraçõesinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisPontifícia Universidade Católica do Rio Grande do SulFaculdade de OdontologiaPrograma de Pós-Graduação em OdontologiaMestrado2011porreponame:Repositório Institucional PUCRSinstname:Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS)instacron:PUC_RSinfo:eu-repo/semantics/openAccessORIGINAL000431505-0.pdfTexto Completoapplication/pdf2652734repositorio.pucrs.br/jspui/bitstream/10923/395/1/000431505-0.pdf34930e0dc8e71cd2f8bedee48c925054MD51LICENSElicense.txttext/plain581repositorio.pucrs.br/jspui/bitstream/10923/395/2/license.txt44ea52f0b7567232681c6e3d72285adcMD52TEXT000431505-0.pdf.txt000431505-0.pdf.txtExtracted texttext/plain175432repositorio.pucrs.br/jspui/bitstream/10923/395/3/000431505-0.pdf.txteab35198989dff318821fb5d0cd79cebMD5310923/3952017-09-28 11:05:35.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ório InstitucionalPRI |
dc.title.pt_BR.fl_str_mv |
Avaliação clínica e histológica de ratos submetidos à injeção em ventre lingual de ácido hialurônico em distintas concentrações |
title |
Avaliação clínica e histológica de ratos submetidos à injeção em ventre lingual de ácido hialurônico em distintas concentrações |
spellingShingle |
Avaliação clínica e histológica de ratos submetidos à injeção em ventre lingual de ácido hialurônico em distintas concentrações Borghetti, Ruchielli Loureiro ODONTOLOGIA ESTOMATOLOGIA HISTOLOGIA ÁCIDO HIALURÔNICO |
title_short |
Avaliação clínica e histológica de ratos submetidos à injeção em ventre lingual de ácido hialurônico em distintas concentrações |
title_full |
Avaliação clínica e histológica de ratos submetidos à injeção em ventre lingual de ácido hialurônico em distintas concentrações |
title_fullStr |
Avaliação clínica e histológica de ratos submetidos à injeção em ventre lingual de ácido hialurônico em distintas concentrações |
title_full_unstemmed |
Avaliação clínica e histológica de ratos submetidos à injeção em ventre lingual de ácido hialurônico em distintas concentrações |
title_sort |
Avaliação clínica e histológica de ratos submetidos à injeção em ventre lingual de ácido hialurônico em distintas concentrações |
author |
Borghetti, Ruchielli Loureiro |
author_facet |
Borghetti, Ruchielli Loureiro |
author_role |
author |
dc.contributor.author.fl_str_mv |
Borghetti, Ruchielli Loureiro |
dc.contributor.advisor1.fl_str_mv |
Figueiredo, Maria Antonia Zancanaro de |
contributor_str_mv |
Figueiredo, Maria Antonia Zancanaro de |
dc.subject.por.fl_str_mv |
ODONTOLOGIA ESTOMATOLOGIA HISTOLOGIA ÁCIDO HIALURÔNICO |
topic |
ODONTOLOGIA ESTOMATOLOGIA HISTOLOGIA ÁCIDO HIALURÔNICO |
description |
Hyaluronic Acid (HA) is currently the most applied resorbable filling material. Its indiscriminate use has showed the adverse reactions. Scientific literature does not conclusively clarify the aetiology of the adverse effects, which can occur after material injection. The current research has aimed at evaluating, through clinical and histological analysis, local and systemic tissue response to the injection of 2 different hyaluronic acid concentrations in rat’s tongue. Fifty-four female Wistar rats (Rattus norvegicus) were randomically allocated into 3 groups according to the treatment (5. 5mg/mL HA, 25mg/mL HA and 0. 9 % NaCl - control) and 3 experimental times (7 days, 60 days and 90 days). Immediately before euthanasia, clinical analysis was performed guided by the parameters of presence and absence of inflammatory signs or any other alteration of the normal pattern. After euthanasia, the tongue and the right kidney of each animal were removed for microscopic analysis. Presence or absence of inflammatory reaction was measured in the tongue sections stained by hematoxylin and eosin (HE) and reactions were classified as mild, moderate or severe. The proportion of collagen fibers present was established in the sections stained with picrosirius. Presence or absence of inflammatory response in the total extension of each slide was observed in the kidney samples (HE). The clinical changes present were not statistically significant among groups (Kruskal-Wallis; p>0. 05). The groups that received HA injection presented a higher degree of inflammation if compared to the control groups in all monitoring periods (Kruskal-Wallis, p<0. 01). Regarding fibroplasias, the 25mg/mL HA group tended to form more collagen if compared to the control group (ANOVA Mixed Models; p=0. 016). In 100% of the analyzed kidney samples, there was no inflammatory reaction. According to the methodology used in this study, the obtained results allows the conclusion that (1) HA at 5. 5 and 25mg/mL presented variable and occasional clinic changes in all evaluation periods; (2) HA in the chosen concentrations, within 7 days, promoted a moderate degree of tissue inflammation; (3) After 60 and 90 days, inflammatory reaction surrounding HA particles became milder, reducing risks of adverse reactions to the material; (4) HA at 25mg/mL provoked larger concentrations of collagen if compared to the control group; (5) There was no inflammatory response and/or renal systemic migration due to the injection of HA at 5. 5mg/mL and 25mg/mL in up to 90 days of monitoring. |
publishDate |
2011 |
dc.date.accessioned.fl_str_mv |
2011-12-27T14:14:08Z |
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2011-12-27T14:14:08Z |
dc.date.issued.fl_str_mv |
2011 |
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Pontifícia Universidade Católica do Rio Grande do Sul Porto Alegre |
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Pontifícia Universidade Católica do Rio Grande do Sul Porto Alegre |
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