Análise das características microscópicas do tecido peri-implantar em diferentes tipos de conexão protética em implantes / Comparative analysis of peri-implant soft tissue microscopic characteristics between two types of implant-prosthetic connections

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

The microscopic characteristics of the peri-implant soft tissue around different types of prosthetic interface for implants has been evaluated by means of histological analysis, 10 patients carrying implant supported bridges has been selected on the basis of the inclusion criteria and divided in two groups, with group I formed by five patients with external hexagon interface type implants and group II formed by five patients with morse taper interface type implants. Gingival soft tissue samples that were in direct contact with prosthetic component have been collected through a surgical procedure, being a sample of each patient, all the samples had been stored in bottles containing 10% formaldehyde and sent to the laboratory for the accomplishment of the analysis. In the analysis, the degree of tissue organization, presence and intensity of the inflammation and the degree of fibrosity has been observed. The five samples of group I presented hyperplasia of the epithelium, being all classified as degree 2, all kept its integrity, being classified as preserved, none of the samples of this group presented attack of inflammatory cells to the epithelium. In the analysis of the connective tissue, four samples of this group were presented normal, without the inflammation presence, only one of the samples presented signals of inflammation, being classified as moderate one, all the samples presented its connective tissue organized, concerning the fibrosity degree, two samples had been classified as degree 3, two as degree 2 and a sample as degree 1, and a sample of this group possessed radicular cementum fragments wrapped by collagen fibers. In group II, four samples presented hyperplasia of the epithelium, being classified as degree 2, only one sample was free of hyperplasia, when the integrity of the epithelium was evaluated, three samples had been classified as preserved and two classified as disorganized, with the presence of inflammatory cells in the interior of the epithelium. Three samples of this group presented attack of inflammatory cells to the epithelium. In the analysis of the connective tissue, all the samples had been classified as organized, with four of the samples presenting signals of inflammation, with classified intensity as degree 3 in two samples and as degree 2 in others two samples, only one sample was classified free of inflammation. Russells corpuscles have been found in three samples. Evaluating the fibrosity degree, three samples have been classified as degree 2 and two as degree 3, radicular cementum fragments were found in one sample of this group. In the statistics analysis statistical no significant differences were found for the variable hyperplasia, fibrosity and intensity of the inflammation when evaluated separately. When the interaction of the three variables was evaluated, also no statistical significant differences were found, having the two groups presented very close results. On the basis of the results obtained in this study, it was not possible to affirm that the present methodology allows to establish that an implantation system can provide better condition to the peri-implant soft tissue surroundings when compared with the other system.

ASSUNTO(S)

gingiva gengiva histology dental implants histologia implantes dentários

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