The effect of dynamic loading on bacterial microleakage of the dental implant fixture-abutment interface: An in vitro study

Amjadi, Mehrak; Khajavi, Azadeh; Youssefi, Navid; Barjini, Negar; Kazemi, Zahra

doi:10.4103/jips.jips_96_21

Cited by 2 publications

(1 citation statement)

References 15 publications

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“…In a two-part implant abutment system, a microgap is present at IAI, through which the seepage of fluid and micro molecules from the saliva, crevicular fluid, and bacteria occurs during cyclic loading of the implant supported crown. 1 The presence of bacteria in the internal recess of implant and penetration of the bacteria through microgap may increase the risk of soft tissue inflammation and bone loss around the implant. 2 Potential colonization of microgap is probably related to precision of fit between implant components and loading forces when implants are in function.…”

Section: Introductionmentioning

confidence: 99%

Comparative Analysis of Microbial Leakage in Implant Recess of Three Different Internal Implant Abutment Connections: An In Vitro Study

Kumar,

Sharma,

Singla

et al. 2023

Dental Journal of Advance Studies

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Objective/Introduction: Bacterial infiltration at implant abutment junction is a potential risk for soft tissue inflammation and bone loss around the implant. Potential colonization of microgap is related to precision of fit at the mating interfaces of implant and abutment and is dependent on structural geometry of implant abutment connection. Considering the limited information regarding differences in microbial penetration at the junction in implants with degree of taper in internal connections, this study conducted comparative analysis of microbial seal of three different implant abutment connections-1.5 mm internal hex (IH), 4° tapered, and 11° conical hex (CH) implants. Materials and methods: Three study groups with 18 implant abutment assemblies in each, included 1.5 mm IH (BioHorizon®), 4° taper (4° CH) internal conical connection (Ankylos®), and 11° taper (11°CH) connection (Neobiotech® Active) implants. Each assembly was suspended in Escherichia coli as well as Enterococcus faecalis suspension in brain heart infusion (BHI) separately and incubated at 37°C for 3 days. Wash from respective implant internal recess was assessed for microbial contamination. Results: Internal hex group showed significantly higher E. coli (44.4%) and E. faecalis (50.0%) leakage than 4°CH and 11°CH groups. The difference in microbial leakage in 4°CH (11.1%) and 11°CH (16.7%) for both the study microbes was statistically insignificant (p = 0.630), thus partially accepting the null hypothesis. Conclusion:The type of connection significantly influences microbial leakage at implant abutment junction with internal connection more conducive to bacterial infiltrations than conical connection implants. However, degree of taper of conical connection does not have a significant effect on bacterial permeability of the implant abutment connection.

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Section: Introductionmentioning

confidence: 99%

Comparative Analysis of Microbial Leakage in Implant Recess of Three Different Internal Implant Abutment Connections: An In Vitro Study

Kumar,

Sharma,

Singla

et al. 2023

Dental Journal of Advance Studies

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Evaluation of sealing efficacy and removal convenience of sealing materials for implant abutment screw access holes

Zhou

Lyu

et al. 2022

BMC Oral Health

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Background Sealing materials are used to fill abutment screw access holes (SAH) to prevent microleakage and protect the central screws in oral implant restoration. However, thus far, no consensus has been reached on sealing material selection. In this study, a comparison of the sealing efficacy and removal convenience of different sealing materials for cement-retained implant restoration was conducted. Methods Various sealing materials were classified into five groups, namely, gutta-percha (GP), temporary restorative paste (TRP), vinyl polysiloxane (VPS), polytetrafluoroethylene (PTFE) tape, and onlay resin (OR), and 35 sets of analog-abutments were allocated into five groups of seven specimens. A sealing efficacy test was conducted using a modified dye-penetration method, in which a lower absorbance indicated better sealing efficacy. For the removal-convenience test, the materials were removed from each SAH after solidification, and the retrieval time was recorded. Results On days 1 and 10, PTFE exhibited the highest absorbance value with significant differences compared to the other groups. On day 30, TRP and PTFE showed significantly higher absorbance values than GP, VPS, and OR, but no significant difference was detected between TRP and PTFE (p = 0.424). The absorbance values of TRP and PTFE from days 1, 10, and 30 showed significant intragroup differences, while those of the other groups did not. In terms of the removal convenience on days 1, 10, and 30, VPS achieved the best performance, followed by PTFE, OR, TRP, and GP. Conclusion Within the limitations of this experiment, VPS and OR showed better sealing efficacy against microleakage and a more convenient removal than the other materials; thus, VPS and OR are recommended for clinical use.

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The effect of dynamic loading on bacterial microleakage of the dental implant fixture-abutment interface: An in vitro study

Cited by 2 publications

References 15 publications

Comparative Analysis of Microbial Leakage in Implant Recess of Three Different Internal Implant Abutment Connections: An In Vitro Study

Comparative Analysis of Microbial Leakage in Implant Recess of Three Different Internal Implant Abutment Connections: An In Vitro Study

Evaluation of sealing efficacy and removal convenience of sealing materials for implant abutment screw access holes

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