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

He, Yiting; Fok, Alex; Aparicio, Conrado; Teng, Wei

doi:10.1111/cid.12792

Cited by 23 publications

(25 citation statements)

References 32 publications

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“…Zirconia abutments should only be restricted to cases where there is a high demand for aesthetics. These results corroborate the study of He et al [ 46 ] (2019) in which the conical connection showed more resistance against the formation of microgaps at the implant–abutment interface than the external hexagonal connection. Additionally, Gil et al [ 28 ] concluded that internal connections had a smaller microgap than external connections, with significant statistical differences.…”

Section: Discussionsupporting

confidence: 92%

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Review of the Mechanical Behavior of Different Implant–Abutment Connections

Vinhas

Aroso

Salazar

et al. 2020

IJERPH

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Introduction: Different implant–abutment connections have been developed to reduce mechanical and biological failure. The most frequent complications are loss of preload, screw loosening, abutment or implant fracture, deformations at the different interfaces, and bacterial microleakage. Aim: To review the evidence indicating whether the implant–abutment connection type is significant regarding the following issues: (1) maintenance of the preload in static and dynamic in vitro studies; (2) assessment of possible deformations at the implant–abutment interfaces, after repeated application of the tightening torque; (3) evaluation of the sealing capability of different implant connections against microleakage. Materials and Methods: In June 2020, an electronic literature search was performed in Medline, EBSCO host, and PubMed databases. The search was focused on the ability of different implant connections to maintain preload, resist deformation after tightening and retightening, and prevent microleakage. The related titles and abstracts available in English were screened, and the articles that fulfilled the inclusion criteria were selected for full-text reading. Results: The literature search conducted for this review initially resulted in 68 articles, among which 19 articles and 1 systematic review fulfilled the criteria for inclusion. The studies were divided according to the three proposed objectives, with some studies falling into more than one category (maintenance of preload, surface abutment–implant deformation, and resistance to microleakage). Conclusions: Conical abutment appears to result in fewer mechanical complications, such as screw loosening or fractures, and higher torque preservation. After SEM evaluation, damage was observed in the threads of the abutment screws, before and after loading in internal and external connections. Internal hexagon implants and predominantly internal conical (Morse taper) implants showed less microleakage in dynamic loading conditions. We suggest further studies to guarantee excellence in methodological quality.

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Section: Discussionsupporting

confidence: 92%

“…In 2019, He et al [ 46 ] developed numerical and experimental methods for investigating the formation of microgaps and the change in contact area at the implant–abutment interface of conical and external hexagon connections under oblique cyclic loading. Abutments were screwed into five implants of each connection with a torque of 20 Ncm.…”

Section: Resultsmentioning

confidence: 99%

Review of the Mechanical Behavior of Different Implant–Abutment Connections

Vinhas

Aroso

Salazar

et al. 2020

IJERPH

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“…The CAD model of the system was exported to MIDAS computer code [13]. ABAQUS computer code [14], also exploited in [12], will be selected to perform more accurate and complete simulations. Therefore, according to the experimental apparatus that could be realized to obtain values against which to compare the numerical results, a cylinder was discretized by more than 5000 3D axi-symmetrical brick element ( Figure 2).…”

Section: Finite Element Methods Modellingmentioning

confidence: 99%

“…This type of approach is commonly used in various fields, from structural mechanics [8], to computational fluid dynamics (CFD) [9,10]. Furthermore, the FEM has been used also in dental implantology [11,12].…”

Section: Introductionmentioning

confidence: 99%

Modeling of Screw-Dental Structure Interaction: First Step Toward Finite Element Analysis

Pasculli

Rizzo

Mangifesta

et al. 2020

Nonlinear Phenomena in Complex Systems

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This research is focused on the screw-structure interaction under dynamic impulses aimed to the contact analysis of gap propagation at dental implant-abutment interface under dynamic loading. The purpose is to investigate the fracture mechanism that occurs during the screw penetration in a support and during the support vibration. Numerical Finite Element (FEM) analyses are calibrated through experimental laboratory measurements on support materials and screws typologies. Uncertainty due to the laboratory error propagation is investigated using Polynomial Chaos Expansion (PCE) of experimental measurements. The research is planned through the following steps: FEM calibration trough laboratory experiments on materials; laboratory experiments and material mechanics identification; uncertainty error propagation analysis through PCE expansion; fragility curves for numerical model calibration; FEM models calibration trough laboratory measurements on cycling loads. Therefore, the main purpose of the research activity, of which this article constitutes a preliminary and an explorative step, is to study a methodology that minimizes the local damage of the dental material due to the generation of micro-cracks following the implantation actions. Accordingly, in this paper, preliminary results are reported.

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“…Conical systems appear to control this inconvenience better than internal and external connections. According to He et al, the conical connection presents more resistance against formation of micro-gaps at the implant-abutment interface than the external hexagonal connection [24].…”

Section: Conicalmentioning

confidence: 99%

The Impact of Implant–Abutment Connection on Clinical Outcomes and Microbial Colonization: A Narrative Review

et al. 2020

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Introduction: Osseointegration are often suffering from oral conditions, especially, the micro gap at the implant–abutment connection represents a site for bacterial plaque aggregation, leading to increased inflammatory cells and causing peri-implantitis. Aim: The aim of this narrative review was to describe the different kinds of implant–abutment connections and their ability to reduce bacterial leakage and thus prevent peri-implantitis. Materials and methods: The following databases were consulted: Pubmed, Scopus, Cochrane Library, and Research gate and a total of 528 articles were found. After reading the abstract and titles, 473 items were excluded. The remaining articles (n = 55) were assessed for full-text eligibility. Thirty-three studies were included in the review. Results and Conclusions: We selected 22 clinical trials and 11 reviews, examining a total sample of 2110 implants. From the review, it was clear that there exists a relationship between the implant–abutment interface and bacterial leakage. All the connections presented an amount of micro-gap and bacterial micro-leakage, though conical and mixed connection systems seemed to behave better. Moreover, both connections seemed to have a better load distribution and the mixed system also had anti-rotational properties which are very useful during the positioning of the prosthesis.

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

Cited by 23 publications

References 32 publications

Review of the Mechanical Behavior of Different Implant–Abutment Connections

Review of the Mechanical Behavior of Different Implant–Abutment Connections

Modeling of Screw-Dental Structure Interaction: First Step Toward Finite Element Analysis

The Impact of Implant–Abutment Connection on Clinical Outcomes and Microbial Colonization: A Narrative Review

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