Reconstrução alveolar por aumento do assoalho do seio maxilar com beta-tricálcio fosfato ou osso autógeno para reabilitação com prótese implantossuportada
Data
2017-10-06
Autores
Ferreira, Sabrina [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Estadual Paulista (Unesp)
Resumo
A altura insuficiente do osso alveolar é um fator limitante para a reabilitação oral com próteses implantossuportadas. Taxas de sucesso clínico com uso de biomateriais à base de beta-tricálcio fosfato (b-TCP) para elevação do assoalho do seio maxilar (EASM) mostraram que são excelentes alternativas ao osso autógeno (OA). Portanto, objetivo foi avaliar a formação óssea do enxerto de b-TCP em bloco, seis meses após EASM, comparada ao OA por meio de análises tomográfica, microtomográfica e histomorfométrica. Para isso, Oito seios maxilares foram enxertados com b-TCF e sete OA. Após 6 meses, foram obtidas biópsias durante à instalação de implantes dentários. Não houve diferença significante (ANOVA) entre a contração do volume dos seios maxilares preenchidos por OA e b-TCP (p=0,113), bem como para todos os parâmetros microtomográfico (ANOVA) BV/TV (p=0.089), Tb.Th (p=1.000), Tb.Sp (p=0,989) e Tb.N (p=0.917). Na histomorfometria quando comparada a porcentagem ósseo em OA e b-TCP também não foi encontrada diferença estatística (ANOVA, p=0,794). Em conclusão, os resultados deste estudo indicam que ambos OA e b-TCP são adequados para o uso com segurança para o procedimento de EASM pela técnica da janela lateral. O material sintético apresenta boa estabilidade volumétrica com formação óssea semelhante ao OA suportada pelos parâmetros em análises 2D e 3D que se complementam. No entanto, a metodologia da análise volumétrica utilizada neste estudo parece representar a estabilidade volumétrica geral do procedimento, não somente do biomaterial, quando na técnica for utilizado o enxerto em bloco e não particulado.
The insufficient height of the alveolar bone is a limiting factor for oral rehabilitation with implants. Clinical success rates using beta-tricalcium phosphate (b-TCP) biomaterials for maxillary sinus floor elevation (MSFE) have been shown to be excellent alternatives to autogenous bone (AB). Therefore, the objective was to evaluate bone formation of the b-TCP graft in a block, six months after MSFE, compared to AB by means of tomographic, microtomographic and histomorphometric analyzes. For this, eight maxillary sinuses were grafted with b-TCF and seven AB. After 6 months, biopsies were obtained during the installation of dental implants. There was no significant difference (ANOVA) between the volume contraction of the maxillary sinus filled by AB and b-TCP (p = 0.113), as well as for all microtomographic parameters (ANOVA) BV/TV (p = 0.089), Tb.Th (p = 1.000), Tb.Sp (p = 0.989) and Tb.N (p = 0.917). In histomorphometry, when comparing bone percentage in AB and b-TCP, no statistical difference was found (ANOVA , p = 0.794). In conclusion, the results of this study indicate that both AB and b-TCP are suitable for safe use for the MSFE procedure by the side window technique. The synthetic material presents good volumetric stability with bone formation similar to AB supported by the parameters in 2D and 3D analyzes that complement each other. However, the volumetric analysis methodology used in this study seems to represent the general volumetric stability of the procedure, not only of the biomaterial, when in graft and non-particulate graft technique.
The insufficient height of the alveolar bone is a limiting factor for oral rehabilitation with implants. Clinical success rates using beta-tricalcium phosphate (b-TCP) biomaterials for maxillary sinus floor elevation (MSFE) have been shown to be excellent alternatives to autogenous bone (AB). Therefore, the objective was to evaluate bone formation of the b-TCP graft in a block, six months after MSFE, compared to AB by means of tomographic, microtomographic and histomorphometric analyzes. For this, eight maxillary sinuses were grafted with b-TCF and seven AB. After 6 months, biopsies were obtained during the installation of dental implants. There was no significant difference (ANOVA) between the volume contraction of the maxillary sinus filled by AB and b-TCP (p = 0.113), as well as for all microtomographic parameters (ANOVA) BV/TV (p = 0.089), Tb.Th (p = 1.000), Tb.Sp (p = 0.989) and Tb.N (p = 0.917). In histomorphometry, when comparing bone percentage in AB and b-TCP, no statistical difference was found (ANOVA , p = 0.794). In conclusion, the results of this study indicate that both AB and b-TCP are suitable for safe use for the MSFE procedure by the side window technique. The synthetic material presents good volumetric stability with bone formation similar to AB supported by the parameters in 2D and 3D analyzes that complement each other. However, the volumetric analysis methodology used in this study seems to represent the general volumetric stability of the procedure, not only of the biomaterial, when in graft and non-particulate graft technique.
Descrição
Palavras-chave
Fosfatos de cálcio, Levantamento do assoalho do seio maxilar, Enxerto ósseo, Regeneração óssea, Implante dentário, Calcium phosphates, Sinus floor augmentation, Bone transplantation, Bone regeneration, Dental implantation