Microgap and bacterial microleakage during the osseointegration period: An in vitro assessment of the cover screw and healing abutment in a platform-switched implant system

Fernandes, Pedro Ferrás; Grenho, Liliana; Fernandes, María Helena; Sampaio-Fernandes, J.C.; Gomes, Pedro

doi:10.1016/j.prosdent.2021.07.030

Cited by 11 publications

(18 citation statements)

References 25 publications

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“…Failure in implant dentistry can be caused by several factors, such as surgical trauma, structural design, overload, peri-implantitis, periosteal reflection, the autoimmune response of the host, type of tightening (torque or pre-torque), presence of a microgap between implant and abutment and consequent bacterial microleakage [ 1 , 2 , 3 ].…”

Section: Introductionmentioning

confidence: 99%

“…Several studies have reported the penetration of bacteria into the cavities and gaps generated by the presence of microgap at the implant-abutment interface, causing a bacterial reservoir that can interfere with the health of the peri-implant tissue, causing inflammation and bone loss [ 3 , 4 , 5 , 6 , 7 ]. The size and shape of bacteria can be very variable: Cocci are spherical with a diameter of 1–3 µm; rods, comprehend very small bacteria like Pelagibacter ubique (diameter 0.2 µm; length 0.5 µm), Escherichia coli (diameter 1–2 µm; length 1–8 µm), and relatively big ones, like Epulopiscium fishelsoni (diameter 40–80 µm; length 250–600 µm) [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

“…Combined implant-abutment connections are characterized by the combination of geometric features that provide antirotational and prosthetic positioning properties [ 15 ]. Even when the implant and the abutment are correctly connected, microleakage produced by a microcap can be generated, allowing the passage of acids, enzymes, bacteria, and/or their metabolic products [ 3 , 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

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Bacterial Microleakage at the Implant-Abutment Interface: An In Vitro Study

et al. 2022

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The objective of this study is to evaluate, in vitro, the microleakage of bacteria of 3 different implant connections for a period of 14 days. 60 dental implants (AoN) (n = 20) were distinguished into three groups, accordingly to the type of connection: External Hexagon (EH), Internal Hexagon (IH), and Cone Morse (CM) connection. All implants were inserted and fixed on sterile special vinyl support. Ten fixtures for each group were inoculated in the internal platform with 1.0 μL of Streptococcus oralis (SO) and the other ten with the same amount of Pseudomonas aeruginosa (PA). The penetration of bacterial suspension into the surrounding solution was determined by the observation of the turbidity of the broth. Five implants for each sub-group were randomly observed at SEM, to verify the correct fitting of the abutments. Considering the total of the samples analyzed, CM showed significantly lower bacterial contamination, with respect to IH. In particular, bacterial contamination was found in 45%, 55%, and 20% of EH, IH, and CM, respectively. Analyzing results for the type of inoculated bacteria, P. aeruginosa showed a higher ability to contaminate all the connections, with respect to S. oralis.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Bacterial Microleakage at the Implant-Abutment Interface: An In Vitro Study

et al. 2022

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“…One-stage procedures, which have been receiving increasing attention recently, involve the initial healing period of peri-implant tissues 20,21) . Therefore, the exposure to the highly diverse oral microbiota during the osseointegration period might jeopardize implant survival 22) . Furthermore, several other studies have emphasized the importance of determining the seal at the implant-healing abutment interface [22][23][24] .…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the exposure to the highly diverse oral microbiota during the osseointegration period might jeopardize implant survival 22) . Furthermore, several other studies have emphasized the importance of determining the seal at the implant-healing abutment interface [22][23][24] . Fernandes et al 22) reported that during a 30-day follow-up period, approximately 50% of tested healing abutments experienced microleakage.…”

Section: Introductionmentioning

confidence: 99%

The impact of Morse taper implant design on microleakage at implant-healing abutment interface

et al. 2022

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The microbial leakage at the implant-abutment interface (IAI) is one cause of peri-implant infection that puts long-term implant stability at risk. The present study compared two types of Morse taper implants in terms of sealing performance at the implanthealing abutment interface. Three implant systems, one of which exhibited a partial face-contact design (TSO) and the other two a line-contact design (TSM and BLT), were analyzed in vitro using two quantitative implant leakage measuring techniques: airinjection pressure measurement test and microbial examination. An in-house-developed device was used to determine implant leakage by recording the initial drop in pressure while injecting air through the implant. The microbial examination measured the absorbances of culture mediums in which the inoculated implants were contained. Significant difference was found between the partial face-and line-contact groups (p<0.001). Both tests revealed that partial face-contact implants are more prone to leakage than line-contact implants.

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