Análise das alterações na curvatura corneana com implante intra-estromal: estudo experimental em coelhos

Detalhes bibliográficos
Autor(a) principal: Godoy, Cinara Sakuma De Oliveira
Data de Publicação: 2007
Outros Autores: Wahab, Samia Ali, Moreira, Hamilton [UNIFESP], Moreira, Luciane Bugman, Godoy, Glaucio De [UNIFESP]
Tipo de documento: Artigo
Idioma: por
Título da fonte: Repositório Institucional da UNIFESP
Texto Completo: http://dx.doi.org/10.1590/S0004-27492007000200021
http://repositorio.unifesp.br/handle/11600/3588
Resumo: PURPOSE: To evaluate the effect of intrastromal corneal ring implantation on corneal curvature in rabbits. METHODS: Thirty eyes of 15 rabbits were divided into two groups: group 1 with 7 animals and group 2 with 8 animals. The left eye underwent surgery and the right eye was used as control. Ultrasound pachymetry and corneal topography were performed prior to surgery. Anterior segment biomicroscopy and corneal topography were performed after surgery. In group 1, implantation of two ring segments was performed. In group 2, ring segments were implanted separately. Topographical findings, before and after surgery, were compared through quantitative and qualitative alterations and divided into four quadrants. RESULTS: Quantitative analysis showed no significant difference between the groups in the preoperative period. Experiment group 1 showed nasal (p=0.02) and temporal (p=0.04) corneal steepening, compared to control group 1. Experiment group 2 showed nasal and temporal corneal steepening and superior and inferior corneal flattening (p=0.02 for all quadrants) compared to the control group 2. Qualitative analysis showed uniform astigmatism in both control groups. In experiment group 1, against-the-rule regular symmetrical astigmatism was observed after surgery. In experiment group 2, against-the-rule regular asymmetrical astigmatism was found after implantation of the first ring segment, and against the rule regular symmetrical astigmatism was observed after implantation of the second segment. CONCLUSION: In this study, significant corneal flattening occurred in quadrants where ring segments extremities were located and corneal steepening was observed in quadrants where its body was located. Implantation of one ring segment induces asymmetrical astigmatism.
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spelling Análise das alterações na curvatura corneana com implante intra-estromal: estudo experimental em coelhosAnalysis of corneal curvature alteration following intrastromal corneal ring implantation: experimental study in rabbitsCorneal topographyProsthesis implantationCorneal stromaAstigmatismRabbitsTopografia da córneaImplante de próteseEstroma cornealAstigmatismoCoelhosPURPOSE: To evaluate the effect of intrastromal corneal ring implantation on corneal curvature in rabbits. METHODS: Thirty eyes of 15 rabbits were divided into two groups: group 1 with 7 animals and group 2 with 8 animals. The left eye underwent surgery and the right eye was used as control. Ultrasound pachymetry and corneal topography were performed prior to surgery. Anterior segment biomicroscopy and corneal topography were performed after surgery. In group 1, implantation of two ring segments was performed. In group 2, ring segments were implanted separately. Topographical findings, before and after surgery, were compared through quantitative and qualitative alterations and divided into four quadrants. RESULTS: Quantitative analysis showed no significant difference between the groups in the preoperative period. Experiment group 1 showed nasal (p=0.02) and temporal (p=0.04) corneal steepening, compared to control group 1. Experiment group 2 showed nasal and temporal corneal steepening and superior and inferior corneal flattening (p=0.02 for all quadrants) compared to the control group 2. Qualitative analysis showed uniform astigmatism in both control groups. In experiment group 1, against-the-rule regular symmetrical astigmatism was observed after surgery. In experiment group 2, against-the-rule regular asymmetrical astigmatism was found after implantation of the first ring segment, and against the rule regular symmetrical astigmatism was observed after implantation of the second segment. CONCLUSION: In this study, significant corneal flattening occurred in quadrants where ring segments extremities were located and corneal steepening was observed in quadrants where its body was located. Implantation of one ring segment induces asymmetrical astigmatism.OBJETIVO: Avaliar os efeitos do implante de anel corneano intra-estromal sobre a curvatura da córnea em coelhos. MÉTODOS: Trinta olhos de 15 coelhos foram divididos em 2 grupos: o primeiro com 7 e o segundo com 8 animais. O olho esquerdo foi operado e o direito serviu de controle nos 2 grupos. Paquimetria ultra-sônica e ceratoscopia computadorizada foram realizadas no pré-operatório; biomicroscopia de segmento anterior e ceratoscopia computadorizada, no pós-operatório. No grupo 1, foi realizado implante de dois segmentos de anel. No grupo 2, os segmentos foram implantados separadamente. Compararam-se os achados topográficos do pré e do pós-operatório por meio de alterações quantitativas e qualitativas em 4 quadrantes. RESULTADOS: A análise quantitativa no pré-operatório não demonstrou diferença significativa entre os grupos. No grupo experimento 1, houve abaulamento corneano nos setores nasal (p=0,02) e temporal (p=0,04), na comparação com o grupo controle 1. No grupo experimento 2, observou-se o mesmo fato (p=0,02 nasal e temporal) quando comparado ao grupo controle 2. Após implante do segundo segmento, observou-se aplanamento significativo nos setores superior e inferior e abaulamento nos setores nasal e temporal (p=0,02 para todos os quadrantes). Pela análise qualitativa, observou-se astigmatismo uniforme nos grupos controle 1 e 2. No grupo experimento 1, observou-se astigmatismo simétrico contra a regra. No grupo experimento 2, observou-se astigmatismo contra a regra assimétrico, após implante do primeiro segmento, e simétrico, após o segundo implante. CONCLUSÃO: Observou-se aplanamento corneano significativo no eixo onde se localizam as extremidades do segmento de anel e abaulamento nos setores onde se localiza seu corpo. O implante de apenas um segmento induz astigmatismo assimétrico.Universidade Federal do ParanáUFPRUniversidade Federal de São Paulo (UNIFESP)Faculdade Evangélica do ParanáUNIFESPHospital de Olhos do ParanáUNIFESPSciELOConselho Brasileiro de OftalmologiaUniversidade Federal do ParanáUFPRUniversidade Federal de São Paulo (UNIFESP)Faculdade Evangélica do ParanáHospital de Olhos do ParanáGodoy, Cinara Sakuma De OliveiraWahab, Samia AliMoreira, Hamilton [UNIFESP]Moreira, Luciane BugmanGodoy, Glaucio De [UNIFESP]2015-06-14T13:36:47Z2015-06-14T13:36:47Z2007-03-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion303-311application/pdfhttp://dx.doi.org/10.1590/S0004-27492007000200021Arquivos Brasileiros de Oftalmologia. Conselho Brasileiro de Oftalmologia, v. 70, n. 2, p. 303-311, 2007.10.1590/S0004-27492007000200021S0004-27492007000200021.pdf0004-2749S0004-27492007000200021http://repositorio.unifesp.br/handle/11600/3588porArquivos Brasileiros de Oftalmologiainfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UNIFESPinstname:Universidade Federal de São Paulo (UNIFESP)instacron:UNIFESP2024-07-28T12:39:45Zoai:repositorio.unifesp.br/:11600/3588Repositório InstitucionalPUBhttp://www.repositorio.unifesp.br/oai/requestbiblioteca.csp@unifesp.bropendoar:34652024-07-28T12:39:45Repositório Institucional da UNIFESP - Universidade Federal de São Paulo (UNIFESP)false
dc.title.none.fl_str_mv Análise das alterações na curvatura corneana com implante intra-estromal: estudo experimental em coelhos
Analysis of corneal curvature alteration following intrastromal corneal ring implantation: experimental study in rabbits
title Análise das alterações na curvatura corneana com implante intra-estromal: estudo experimental em coelhos
spellingShingle Análise das alterações na curvatura corneana com implante intra-estromal: estudo experimental em coelhos
Godoy, Cinara Sakuma De Oliveira
Corneal topography
Prosthesis implantation
Corneal stroma
Astigmatism
Rabbits
Topografia da córnea
Implante de prótese
Estroma corneal
Astigmatismo
Coelhos
title_short Análise das alterações na curvatura corneana com implante intra-estromal: estudo experimental em coelhos
title_full Análise das alterações na curvatura corneana com implante intra-estromal: estudo experimental em coelhos
title_fullStr Análise das alterações na curvatura corneana com implante intra-estromal: estudo experimental em coelhos
title_full_unstemmed Análise das alterações na curvatura corneana com implante intra-estromal: estudo experimental em coelhos
title_sort Análise das alterações na curvatura corneana com implante intra-estromal: estudo experimental em coelhos
author Godoy, Cinara Sakuma De Oliveira
author_facet Godoy, Cinara Sakuma De Oliveira
Wahab, Samia Ali
Moreira, Hamilton [UNIFESP]
Moreira, Luciane Bugman
Godoy, Glaucio De [UNIFESP]
author_role author
author2 Wahab, Samia Ali
Moreira, Hamilton [UNIFESP]
Moreira, Luciane Bugman
Godoy, Glaucio De [UNIFESP]
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Universidade Federal do Paraná
UFPR
Universidade Federal de São Paulo (UNIFESP)
Faculdade Evangélica do Paraná
Hospital de Olhos do Paraná
dc.contributor.author.fl_str_mv Godoy, Cinara Sakuma De Oliveira
Wahab, Samia Ali
Moreira, Hamilton [UNIFESP]
Moreira, Luciane Bugman
Godoy, Glaucio De [UNIFESP]
dc.subject.por.fl_str_mv Corneal topography
Prosthesis implantation
Corneal stroma
Astigmatism
Rabbits
Topografia da córnea
Implante de prótese
Estroma corneal
Astigmatismo
Coelhos
topic Corneal topography
Prosthesis implantation
Corneal stroma
Astigmatism
Rabbits
Topografia da córnea
Implante de prótese
Estroma corneal
Astigmatismo
Coelhos
description PURPOSE: To evaluate the effect of intrastromal corneal ring implantation on corneal curvature in rabbits. METHODS: Thirty eyes of 15 rabbits were divided into two groups: group 1 with 7 animals and group 2 with 8 animals. The left eye underwent surgery and the right eye was used as control. Ultrasound pachymetry and corneal topography were performed prior to surgery. Anterior segment biomicroscopy and corneal topography were performed after surgery. In group 1, implantation of two ring segments was performed. In group 2, ring segments were implanted separately. Topographical findings, before and after surgery, were compared through quantitative and qualitative alterations and divided into four quadrants. RESULTS: Quantitative analysis showed no significant difference between the groups in the preoperative period. Experiment group 1 showed nasal (p=0.02) and temporal (p=0.04) corneal steepening, compared to control group 1. Experiment group 2 showed nasal and temporal corneal steepening and superior and inferior corneal flattening (p=0.02 for all quadrants) compared to the control group 2. Qualitative analysis showed uniform astigmatism in both control groups. In experiment group 1, against-the-rule regular symmetrical astigmatism was observed after surgery. In experiment group 2, against-the-rule regular asymmetrical astigmatism was found after implantation of the first ring segment, and against the rule regular symmetrical astigmatism was observed after implantation of the second segment. CONCLUSION: In this study, significant corneal flattening occurred in quadrants where ring segments extremities were located and corneal steepening was observed in quadrants where its body was located. Implantation of one ring segment induces asymmetrical astigmatism.
publishDate 2007
dc.date.none.fl_str_mv 2007-03-01
2015-06-14T13:36:47Z
2015-06-14T13:36:47Z
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1590/S0004-27492007000200021
Arquivos Brasileiros de Oftalmologia. Conselho Brasileiro de Oftalmologia, v. 70, n. 2, p. 303-311, 2007.
10.1590/S0004-27492007000200021
S0004-27492007000200021.pdf
0004-2749
S0004-27492007000200021
http://repositorio.unifesp.br/handle/11600/3588
url http://dx.doi.org/10.1590/S0004-27492007000200021
http://repositorio.unifesp.br/handle/11600/3588
identifier_str_mv Arquivos Brasileiros de Oftalmologia. Conselho Brasileiro de Oftalmologia, v. 70, n. 2, p. 303-311, 2007.
10.1590/S0004-27492007000200021
S0004-27492007000200021.pdf
0004-2749
S0004-27492007000200021
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv Arquivos Brasileiros de Oftalmologia
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 303-311
application/pdf
dc.publisher.none.fl_str_mv Conselho Brasileiro de Oftalmologia
publisher.none.fl_str_mv Conselho Brasileiro de Oftalmologia
dc.source.none.fl_str_mv reponame:Repositório Institucional da UNIFESP
instname:Universidade Federal de São Paulo (UNIFESP)
instacron:UNIFESP
instname_str Universidade Federal de São Paulo (UNIFESP)
instacron_str UNIFESP
institution UNIFESP
reponame_str Repositório Institucional da UNIFESP
collection Repositório Institucional da UNIFESP
repository.name.fl_str_mv Repositório Institucional da UNIFESP - Universidade Federal de São Paulo (UNIFESP)
repository.mail.fl_str_mv biblioteca.csp@unifesp.br
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