Abutment Coating With Diamond‐Like Carbon Films to Reduce Implant–Abutment Bacterial Leakage

Cardoso, Mayra; Sangalli, Jorgiana; Koga-Ito, Cristiane Yumi; Ferreira, Leandro Lameirão; Sobrinho, Argemiro Soares da Silva; Nogueira, Lafayette

doi:10.1902/jop.2015.150362

Cited by 17 publications

(13 citation statements)

References 30 publications

(64 reference statements)

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“…Research on antiseptic, sealing agent and disinfectant does not support the use of these methods for reducing bacterial leakage into the implant. [33][34][35] In any case, to the authors' knowledge, there is not yet a proven relation between the volume of leakage or bacteria and the severity of peri-implant inflammation. On the other hand, the frictional movement between the implant and abutment produces debris and ions, which may lead to further complications such as corrosion and peri-implant inflammation.…”

Section: Discussionmentioning

confidence: 92%

“…[33][34][35] In any case, to the authors' knowledge, there is not yet a proven relation between the volume of leakage or bacteria and the severity of peri-implant inflammation. [33][34][35] In any case, to the authors' knowledge, there is not yet a proven relation between the volume of leakage or bacteria and the severity of peri-implant inflammation.…”

Section: Evaluation Based On Micro-ct Imagesmentioning

confidence: 92%

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

Fok

Aparicio

et al. 2019

Clin Implant Dent Rel Res

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Purpose: To develop numerical and experimental methods for investigating the formation of micro-gaps and the change in contact area at the implant-abutment interface of two different connector designs under oblique cyclic loading.Materials and Methods: Samples (n = 10 per group) of two-piece implant systems with the conical connection (group A) and the external hexagonal connection (group B) were subjected to cyclic loading with increasing load amplitudes up to 220 N.After loading, the samples were scanned using micro-CT, with silver nitrate as a highcontrast penetrant, and the level of leakage was assessed using a discrete scoring system. Three-dimensional finite element (FE) analyses of the two implant systems were also conducted to reveal the micro-gap formation process, especially bridging of the internal abutment screw space. The experimental and numerical results for the bridging load were then compared.Results: 90% of the samples in group A showed leakage into the internal implant space at a load of around 100 N; while over 80% of those in group B did so at a load of around 40 N. This agreed with the FE analysis, which showed bridging of the internal implant space at loads similar to those measured for the two implant systems.Residual gaps of less than 1.49 μm were predicted for group A only after unloading. Conclusions:The FE-predicted loads for bridging agreed well with those found experimentally for leakage to occur. The conical connection showed more resistance against formation of micro-gaps at the implant-abutment interface than the external hexagonal connection. Although the minimum load required to bridge the internal implant space was within the range of human biting force, the relation between bacterial invasion and micro-gaps needs further research. K E Y W O R D S finite element analysis, implant connection design, implant-abutment micro-gap, microcomputed tomography

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Section: Discussionmentioning

confidence: 92%

Section: Evaluation Based On Micro-ct Imagesmentioning

confidence: 92%

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

Fok

Aparicio

et al. 2019

Clin Implant Dent Rel Res

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“…The DLC doped with silver nanoparticles has been reported effective in the reduction of bacterial adhesion in acrylic resin26 and bacterial infiltration in the implant/abutment interface. 27 Several studies seek, with variation in the deposition, composition, and application parameters, to obtain more stable conditions of this coating over the desired surface. [28][29][30][31][32][33][34][35] However, the deposition parameters for this coating are not established in Dentistry literature.…”

Section: Received 21 March 2019; Accepted 15 April 2019mentioning

confidence: 99%

Diamond-like carbon films over reconstructive TMJ prosthetic materials: Effects in the cytotoxicity, chemical and mechanical properties

Silva

Figueiredo

Prado

et al. 2019

Journal of Oral Biology and Craniofacial Research

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Increasingly more young patients have been submitted to reconstruction of the Temporomandibular Joint (TMJ), so, the prostheses must to present more functional longevity. Objective: To evaluate the effect of diamond-like carbon film (DLC) over titanium alloy (Ti6Al4V) and polyethylene (UHWPE) samples, their mechanical and chemical properties and cellular cytotoxicity. Methods: Titanium and UHWPE specimens, with 2.5 cm in diameter and 2 mm thickness were coated through plasma enhanced chemical vapor deposition (PECVD) with DLC or DLC doped with silver (DLC-Ag). Scanning electron microscopy (SEM) morphological analysis, Energy-dispersive spectroscopy (EDS) chemical analysis, scratching test, mechanical fatigue test, surface roughness analysis, and cellular cytotoxicity were performed. Data were statistically analyzed using one-way ANOVA (p < 0.05) or two-way ANOVA and multiple comparison Tukey test. Results: In the SEM analysis, morphological differences were observed on substrates after DLC deposition. The film chemically modified the substrate surfaces, according to the EDS analysis. The initial critical load failure occurred at 6.1 N for DLC and 9.7 N for the DLC-Ag film. The DLC film deposition over the polyethylene promoted a decrease in the polymer's damaged area after mechanical fatigue cycling. The cytotoxicity analysis demonstrated less biocompatibility in experimental groups, when compared to control, however, increased biocompatibility was observed, at 10 days, in all groups. Conclusion: The diamond-like carbon coating enhanced the chemical and mechanical properties from substrates, however modified biological interaction course of the titanium alloy (Ti6Al4V) and polyethylene (UHWPE) samples. Parameters for film deposition remain to be improved in order to obtain best biocompatibility.

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“…Under loaded conditions, the pump effect provided by micro-movements of components may facilitate the microbial/fluid leakage into the implants. To date, several studies using culture-based methods or DNA probes have proved the microleakage through the implant-abutment interface even in static conditions (Teixeira et al 2011;Cardoso et al 2015). However, considering the very small size of oral bacteria and that implant connections still fail in preventing microbial/fluids leakage, a more plausible explanation for the absence of DNA hybridization detection should be credited to the sensitivity detection of this methodology.…”

Section: Discussionmentioning

confidence: 99%

Experimental conical‐head abutment screws on the microbial leakage through the implant‐abutment interface: an in vitro analysis using target‐specific DNA probes

Pita

Nascimento

Santos

et al. 2016

Clinical Oral Implants Res

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Abutment Coating With Diamond‐Like Carbon Films to Reduce Implant–Abutment Bacterial Leakage

Abstract: IH implants show a higher frequency of bacterial leakage; and DLC and Ag-DLC films do not significantly reduce the frequency of bacterial leakage and bacteria load inside the implants.

Cited by 17 publications

References 30 publications

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

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

Diamond-like carbon films over reconstructive TMJ prosthetic materials: Effects in the cytotoxicity, chemical and mechanical properties

Experimental conical‐head abutment screws on the microbial leakage through the implant‐abutment interface: an in vitro analysis using target‐specific DNA probes

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