Microbiological assessment of the implant‐abutment interface in different connections: cross‐sectional study after 5 years of functional loading

Abstract

Outcomes suggested that all the analyzed connections resulted contaminated after 5 years of functional loading. However, the connection design might influence bacterial activity levels qualitatively and quantitatively, especially inside the implant connection.

Contact analysis of gap formation at dental implant‐abutment interface under oblique loading: A numerical‐experimental study

“…These oral fluids could carry bacteria and small molecules such as VOC 6 into the peri-implant sulcus or inside the implant, as found by some in vivo studies. 25 However, within the range of loads (10-100 N) tested in our FE analysis (Figure 8), the gap sizes, especially those within the bridging zone, may not be large enough for the invasion of bacteria, the size of which can reach 6 μm. 26 According to previous FE studies, the implant-abutment gaps in systems with the conical connection were smaller than those with nonconical ones.…”

Systematic review of some prosthetic risk factors for periimplantitis

“…This stresses that a pathogenic flora alone is not capable of causing periimplantitis. In a microbiologic study on cemented fixed prostheses after 5 years of functional loading by Canullo et al, 14 none of the examined implant/abutment connections had the capacity to prevent microbiologic leakage. However, in the internal hexagon with external collar connection group and in the conical connection group, Canullo and al 14 found significantly lower bacterial counts in the periimplant sulcus and inside the connection.…”

“…In a microbiologic study on cemented fixed prostheses after 5 years of functional loading by Canullo et al, 14 none of the examined implant/abutment connections had the capacity to prevent microbiologic leakage. However, in the internal hexagon with external collar connection group and in the conical connection group, Canullo and al 14 found significantly lower bacterial counts in the periimplant sulcus and inside the connection. This suggests that the connection design might influence bacterial activity levels qualitatively and quantitatively and a cleaning of connections is suggested in patients with periimplantitis to reduce the bacterial levels at the connection level given their presence in all compartments.…”

Fatigue induced changes in conical implant–abutment connections

“…The etiopathogenesis of periimplantitis is not yet fully understood [20]. Besides bacterial contamination wear at the implant-abutment interface with discharge of wear debris is currently discussed [21][22][23].…”