Effects of different sterilization methods on surface characteristics and biofilm formation on zirconia in vitro

Han, Anqin; Tsoi, James Kit‐Hon; Matinlinna, Jukka Pekka; Zhang, Yu; Chen, Zhuofan

doi:10.1016/j.dental.2017.11.012

Cited by 45 publications

(33 citation statements)

References 58 publications

(68 reference statements)

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“…The wettability of 3Y-TZP was also significantly changed by the treatments. When not subjected to autoclaving, the polished surface of 3Y-TZP was hydrophobic as previously reported [ 11 , 46 ], irrespective of whether ultrasonic scaling was performed (contact angle: approximately 70°). In contrast, the surface affected by LTD was hydrophilic (contact angle: approximately 28°), and additional ultrasonic scaling using a steel scaler tip returned the wettability from hydrophilic to hydrophobic.…”

Section: Discussionsupporting

confidence: 76%

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Surface properties of dental zirconia ceramics affected by ultrasonic scaling and low-temperature degradation

et al. 2018

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Zirconia (3Y-TZP) dental prostheses are widely used in clinical dentistry. However, the effect of ultrasonic scaling performed as a part of professional tooth cleaning on 3Y-TZP dental prostheses, especially in conjunction with low-temperature degradation (LTD), has not been fully investigated. The present study aimed to evaluate the influence of ultrasonic scaling and LTD on the surface properties of 3Y-TZP in relation to bacterial adhesion on the treated surface. 3Y-TZP specimens (4 × 4 × 2 mm) were polished and then subjected to autoclaving at 134°C for 100 h to induce LTD, followed by 10 rounds of ultrasonic scaling using a steel scaler tip for 1 min each. Surface roughness, crystalline structure, wettability, and hardness were analyzed by optical interferometry, X-ray diffraction analysis, contact angle measurement, and nano-indentation technique, respectively. Subsequently, bacterial adhesion onto the treated 3Y-TZP surface was evaluated using Streptococcus mitis and S. oralis. The results demonstrated that the combination of ultrasonic scaling and LTD significantly increased the Sa value (surface roughness parameter) of the polished 3Y-TZP surface from 1.6 nm to 117 nm. LTD affected the crystalline structure, causing phase transformation from the tetragonal to the monoclinic phase, and decreased both the contact angle and surface hardness. However, bacterial adhesion was not influenced by these changes in surface properties. The present study suggests that ultrasonic scaling may be acceptable for debridement of 3Y-TZP dental prostheses because it did not facilitate bacterial adhesion even in the combination with LTD, although it did cause slight roughening of the surface.

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Section: Discussionsupporting

confidence: 76%

“…The surface properties (e.g. surface roughness, surface free energy, and chemical conditions of the topmost surface) of zirconia play an important role in achieving appropriate biocompatibility and in reducing bacterial adhesion [ 10 , 11 ]. Ultrasonic scaling may mechanically alter the surface properties.…”

Section: Introductionmentioning

confidence: 99%

Surface properties of dental zirconia ceramics affected by ultrasonic scaling and low-temperature degradation

et al. 2018

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“…e reduction of the density of CH 3 groups compared to the hydroxyl groups has an important influence by increasing the hydrophilic behavior [17] of the sterilized hybrid coatings. Similar results were published by Wittenburg et al [36] and Han et al [37] when glass and zirconia surfaces were sterilized using similar processes. e highest contact angle values were found for the autoclaved samples, followed by the samples sterilized with ethylene oxide, and hydrogen peroxide plasma.…”

Section: Teos/mtes (24 H)supporting

confidence: 88%

Effect of Sterilization on the Properties of a Bioactive Hybrid Coating Containing Hydroxyapatite

Baldin

Malfatti

Rodói

et al. 2019

Advances in Materials Science and Engineering

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The objective of this study was to evaluate the influence of sterilization on a hybrid coating obtained from a sol composed of alkoxysilane tetraethoxysilane (TEOS) and organoalkoxysilane methyltriethoxysilane (MTES) containing 10% (mass) of hydroxyapatite particles. The coating was obtained by dip coating, by applying two layers (protective/bioactive), which were cured at different temperatures (450°C and 60°C). The effects of sterilization on the superficial, electrochemical, bioactive, and mechanical properties of the coating were evaluated by performing different sterilization processes, namely, steam autoclave, hydrogen peroxide plasma, and ethylene oxide. Subsequently, the coating was characterized by using scanning electron microscopy (SEM/FEG), and FTIR measurements were performed to characterize the chemical structure. The bioactivity and degradability of the coating were analyzed by mass variation after immersion in SBF and X-ray diffraction (XRD) analysis. The electrochemical behavior was assessed by open circuit potential (OCP) and potentiodynamic polarization curves and the mechanical behavior by wear resistance. Results showed that all sterilization processes caused significant morphological changes in the hybrid coating. The autoclaved sample presented the highest structural chemical changes, and, consequently, the highest degradability, even though it had a superior bioactive behavior in relation to the other samples. In addition, the sterilization processes influenced the electrochemical behavior of the hybrid coating and altered the mechanical resistance to abrasion, thus presenting lower wear performance in relation to the nonsterilized sample.

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“…Several surface modifications have been conducted on zirconia to modify surface roughness to promote cell attachment, e.g. grit blasting ("sand blasting") [39][40] , sterilization 41) , and hydrofluoric acid etching 39,42,43) . It was found that grit blasting can improve the mechanical properties of bioactive glass infiltrated zirconia with better osteoblast cell response 44) .…”

Section: Grit Blastingmentioning

confidence: 99%

An introduction of biological performance of zirconia with different surface characteristics: A review

et al. 2020

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Zirconia (ZrO2) ceramic is widely used in dentistry as a clinical dental biomaterial. In this review, we are focusing on and summarizing the biological performance of zirconia under different surface characteristics. We have included an initial tissue cell attachment study on zirconia and bacterial adhesion on zirconia. Our results suggest that surface modifications applied on zirconia may change the interfacial surface characteristics e.g. surface roughness, surface free energy, and chemistry of zirconia. The modifications also result in advanced biological performance of zirconia, including enhanced tissue cell attachment and reduction of bacterial adhesion. The recent laboratory research has provided many interesting modification methods and showed clinically interesting and promising outcomes. A few of the outcomes are validated and have been applied in clinical dentistry.

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Effects of different sterilization methods on surface characteristics and biofilm formation on zirconia in vitro

Abstract: It is evident that various sterilization methods could change the surface which contribute to different biofilm formation and colour on zirconia.

Cited by 45 publications

References 58 publications

Surface properties of dental zirconia ceramics affected by ultrasonic scaling and low-temperature degradation

Surface properties of dental zirconia ceramics affected by ultrasonic scaling and low-temperature degradation

Effect of Sterilization on the Properties of a Bioactive Hybrid Coating Containing Hydroxyapatite

An introduction of biological performance of zirconia with different surface characteristics: A review

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