Susceptibilidade à infiltração bacteriana na interface de três modelos de implante-componente protético: cone Morse, hexágono externo e hexágono interno

Resumo (EN)

The purpose of this research was to investigate the probability of Staphylococcus aureus (Sau) and Streptococcus mutans (Smut) bacterial infiltration through the prosthetic implant-pillar interface. Three study groups were divided into internal hexagon (HI; n = 10), external hexagon (HE; n = 10) and Morse cone (CM; n = 10), as well as a control group (n = 1) which was defined for each study group. One hundred μl of both bacterial suspensions were added to Petri dishes containing 15 mL of MH agar, which were scattered and incubated at 36.5 ° C for 24 h. Colony forming units were obtained and the results were compared between the groups. The results showed that the HE and HI connections were significantly more effective in preventing Sau infiltration, whereas a significantly higher number of bacteria was observed in the CM type implant, in relation to the HE type (p <0.001) and type HI (p <0.01), without statistically significant differences between HE and HI implants (p> 0.05). For Smut infiltration the differences were observed between the CM and HE groups (p <0.001) and between the CM and HI groups (p <0.001), demonstrating the greatest infiltration in the CM group. It is possible to conclude that HE and HI connections have been shown to be more effective in preventing bacterial infiltration and that the DAI (Dimas, Alexandre e Ivana) technique is feasible to evaluate the infiltration of microorganisms through the implant-pillar interface.