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Master's Dissertation
DOI
https://doi.org/10.11606/D.25.1999.tde-07012005-092122
Document
Author
Full name
Mariza Akemi Matsumoto
Institute/School/College
Knowledge Area
Date of Defense
Published
Bauru, 1999
Supervisor
Committee
Consolaro, Alberto (President)
Nary Filho, Hugo
Rezende, Maria Lucia Rubo de
Title in Portuguese
Análise Microscópica de Rebordos Alveolares Maxilares Reconstruídos com Enxertos Autógenos de Crista Ilíaca e Região Mentoniana.
Keywords in Portuguese
cirurgia bucal
implantes dentários
Abstract in Portuguese
A instalação de implantes osseointegrados em rebordos atróficos reconstruídos com a utilização de enxertos ósseos autógenos vem sendo amplamente utilizada, principalmente com a adoção de dois tempos cirúrgicos . Neste estudo, buscou-se, à luz da microscopia óptica, avaliar o reparo e a qualidade óssea obtidos em rebordos maxilares que receberam enxertos de duas zonas doadoras, a crista ilíaca e o mento. Para tanto, dez pacientes submetidos à este tipo de reconstrução integraram a amostra. No período de quatro meses após este procedimento cirúrgico, no momento da colocação dos implantes, foram obtidos cinco espécimes de cada tipo de enxerto, por meio de biópsias realizadas com brocas trefinas. As peças cirúrgicas passaram por procedimento histotécnico de rotina e foram coradas pelas técnicas de H.E. e Tricrômico de Mallory. Como resultados, verificou-se tecido ósseo em franco processo de remodelação, evidenciado pelas numerosas áreas de osteogênese presentes em ambos os enxertos. Da análise das superfícies de matriz óssea mineralizada obteviveram-se valores significativamente maiores para as regiões que receberam enxerto de mento. Desta forma, concluiu-se que o período de quatro meses se mostrou suficiente para a incorporação dos enxertos, sendo viável a instalação dos implantes neste momento. Quanto à qualidade óssea, os enxertos de mento apresentaram-se superiores aos de ilíaco, possivelmente devido à sua arquitetura original.
Title in English
Microscopical analysis of reconstructed maxillary alveolar ridges using iliac crest and chin autogenous bone grafts
Abstract in English
The insertion of endosseous implants in atrophic ridges reconstructed with autogenous bone grafts has been extensively used, most of the times using two-stage technique. In this study, bone graft repair and bone quality achieved in maxillary ridges reconstructed using iliac crest and chin bone grafts were analysed under light microscopy. Ten patients who underwent this procedure were observed in this study. After 4 months of the bone graft surgery, at the moment of the implants installation, 5 specimens were obtained from biopsies made in each bone graft group using trephine burs. The specimens underwent routine histotechnical procedure and stained by H.E. and Mallory triple stain. As a result, process of bone turnover was revealed by the areas of intense osteogenesis. From the analysis of mineralized bone tissue surface areas, significant greater values were verified in maxillary ridge regions reconstructed with chin graft. From these results, it was concluded that the period of 4 months was sufficient to the incorporation of the grafts. It was also concluded that chin grafts presented better bone quality than iliac crest grafts.
 
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MarizaMatsumoto.pdf (3.89 Mbytes)
Publishing Date
2005-01-18
 
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