scholarly journals Surface Roughness and Streptococcus mutans Adhesion on Metallic and Ceramic Fixed Prosthodontic Materials after Scaling

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 1027
Author(s):  
Jenni Hjerppe ◽  
Sampo Rodas ◽  
Johanna Korvala ◽  
Paula Pesonen ◽  
Anna Kaisanlahti ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Stainless Steel ◽  
Surface Treatment ◽  
Streptococcus Mutans ◽  
Bacterial Adhesion ◽  
Lithium Disilicate ◽  
Human Saliva ◽  
Contact Angles ◽  
Cobalt Chromium ◽  
Ultrasonic Scaler

The aim of this study was to evaluate the surface roughness of fixed prosthodontic materials after polishing or roughening with a stainless steel curette or ultrasonic scaler and to examine the effect of these on Streptococcus mutans adhesion and biofilm accumulation. Thirty specimens (10 × 10 × 3 mm3) of zirconia (Zr), pressed lithium disilicate (LDS-Press), milled lithium disilicate glazed (LDS-Glaze), titanium grade V (Ti) and cobalt-chromium (CoCr) were divided into three groups (n = 10) according to surface treatment: polished (C), roughened with stainless steel curette (SC), roughened with ultrasonic scaler (US). Surface roughness values (Sa, Sq) were measured with a spinning disc confocal microscope, and contact angles and surface free energy (SFE) were measured with a contact angle meter. The specimens were covered with sterilized human saliva and immersed into Streptococcus mutans suspensions for bacterial adhesion. The biofilm was allowed to form for 24 h. Sa values were in the range of 0.008–0.139 µm depending on the material and surface treatment. Curette and ultrasonic scaling increased the surface roughness in LDS-Glaze (p < 0.05), Ti (p < 0.01) and CoCr (p < 0.001), however, surface roughness did not affect bacterial adhesion. Zr C and US had a higher bacterial adhesion percentage compared to LDS-Glaze C and US (p = 0.03). There were no differences between study materials in terms of biofilm accumulation.

scholarly journals Bacterial Adhesion on Lithium Disilicate Ceramic Surface Exposed to Different Hydrofluoric Solutions

Ceramics ◽  
2018 ◽  
Vol 1 (1) ◽  
pp. 145-152
Author(s):  
Daniela Santos ◽  
Emily Silva ◽  
Adaias Matos ◽  
Beatriz Monteiro ◽  
Rodrigo Medeiros ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Bacterial Adhesion ◽  
Artificial Saliva ◽  
Lithium Disilicate ◽  
The Other ◽  
Ceramic Surface ◽  
Streptococcus Sanguinis ◽  
Before And After ◽  
Major Surface ◽  
Ceramic Restorations

The effect of Fluorine solutions on the surface and bacterial adhesion of lithium disilicate is a concern. The aim was to evaluate the surface roughness and the adhesion of Streptococcus sanguinis on lithium disilicate ceramic, under the influence of different solutions containing Fluorine. Forty lithium disilicate (IPS e.max Press Impulse) discs (2.5 × 5 mm) was divided into 4 groups (n = 10): artificial saliva (Group AS), 0.2% sodium fluoride (Group NaF), 1.23% acidulated phosphate fluoride gel (Group APF), and mouthwash (Group MW). Roughness analyses were performed before and after the immersion. The surface aspect was evaluated by scanning electron microscopy (SEM) and the adhesion of Streptococcus sanguinis were evaluated after immersion in the solutions. The data obtained were submitted to the analysis of variance (ANOVA) and the Tukey test (α = 0.05). The Group APF presented a bigger roughness (3.263), statistically different to the other solutions. The bacterial adhesion in the Group APF (5.85) presented statistical difference to the other solutions. The SEM micrographs showed a rougher surface in Group APF. The 1.23% APF gel promoted major surface roughness and bacterial adhesion and could be inadequate for the use of patients with lithium disilicate ceramic restorations. Clinical significance: The Fluorine solution can affect the lithium disilicate ceramics, generating a rough and non-esthetic surface. This altered surface could be susceptible to bacterial adhesion, being directly related with periodontal health, the longevity of the restoration and the success of the rehabilitation.

scholarly journals EFFECT OF SILICA COATING IN ACRYLIC ARTIFICIAL TEETH ON SURFACE ROUGHNESS, CONTACT ANGLE, AND GROWTH OF STREPTOCOCCUS MUTANS

2021 ◽  
Vol 8 (2) ◽  
pp. 106
Author(s):  
Adella Syvia Maharani ◽  
Pramudya Aditama ◽  
Murti Indrastuti ◽  
Suparyono Saleh
Keyword(s):  
Surface Roughness ◽  
Contact Angle ◽  
Streptococcus Mutans ◽  
Bacterial Adhesion ◽  
Acrylic Resin ◽  
Silica Coating ◽  
Contact Angle Measurement ◽  
Angle Measurement ◽  
Group I ◽  
Artificial Teeth

ABSTRACTBackground: Acrylic resin artificial teeth is easily to have bacterial adhesion. It is necessary to perform a treatment on that surface, in order to reduce bacterial adhesion. This study aimed to reveal the effect of silica coating in acrylic resin artificial teeth on surface roughness, contact angle measurement, and the growth of Streptococcus mutans.Method: The study was conducted on two groups (n=16) of disk-shaped acrylic resin artificial teeth with a diameter of 10 mm and thickness of 2 mm. A 2% silica coating material was obtained by diluting 2 g silica nanoparticles on 100 ml of ethanol. Surface roughness, contact angle measurement, and the growth of Streptococcus mutans was measured using surface roughness measuring instrument, camera digital, and colony counter. The data obtained were then analyzed using T-test (p<0.05).Result: The results showed that the surface roughness and contact angle measurement in group I (0.29±0.08 μm); (79,49º ± 10,88º) was higher than group II (0.17±0.05 μm); (34,77º±0,05º). The growth of Streptococcus mutans in group I was also higher (32.28±3.75 CFU/ml) than group II (24.83±3.47 CFU/ml). Conclusion: The study concluded that there is an effect of silica coating on surface roughness, contact angle measurement, and the growth of Streptococcus mutans in acrylic resin artificial teeth.

scholarly journals Qualitative Evaluation of the Effects of Professional Oral Hygiene Instruments on Prosthetic Ceramic Surfaces

Materials ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 21
Author(s):  
Francesco Grande ◽  
Edoardo Mochi Zamperoli ◽  
Mario Cesare Pozzan ◽  
Fabio Tesini ◽  
Santo Catapano
Keyword(s):  
Surface Roughness ◽  
Stainless Steel ◽  
Bacterial Adhesion ◽  
Qualitative Evaluation ◽  
The Other ◽  
Metal Free ◽  
Zirconia Sample ◽  
Dental Prostheses ◽  
Ceramic Surfaces ◽  
Scanning Electron

During professional hygiene procedures, different instruments used may cause various damage to dental prostheses. Deplaquing and scaling with curettes and ultrasonic instruments may inadvertently increase the surface roughness of the material and the risk of future bacterial adhesion and/or also compromise the marginal seal of the prosthesis. Hence, the aim of this study was to assess the qualitative effects of two types of curettes and one piezoelectric instrument with a stainless-steel tip on three types of metal-free samples. After treating the samples with different instrumentations, they were analyzed using the scanning electron microscope and then underwent a qualitative microanalysis by using a spectroscopy machine. All the materials tested in this study have undergone significant changes of their superficial structure after instrumentation both with mechanical and manual instruments. Plastic curettes appeared to be less aggressive than the other instruments. Disilicate samples show a significantly lower degree of surface glazing erosion compared to the zirconia sample with all the instruments used.

The Effect of Surface Conditions on Corrosion Resistance of a Cobalt-Chromium Alloy

2021 ◽  
Vol 887 ◽  
pp. 358-363
Author(s):  
V.S. Spektor ◽  
S.M. Sarychev ◽  
A.A. Orlov
Keyword(s):  
Surface Roughness ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Medical Devices ◽  
Chromium Alloy ◽  
Cobalt Chromium ◽  
Implantable Medical Devices ◽  
Surface Conditions ◽  
Cobalt Chromium Alloy ◽  
Effect Of Surface

The article discusses the effect of the surface conditions on the corrosion resistance of alloys based on cobalt, titanium and stainless steel, which are currently used for the manufacture of components for implantable medical devices. It is shown that an increase in surface roughness has practically no effect on the corrosion resistance of alloys based on cobalt and titanium.

scholarly journals Bacterial adhesion on conventional and self-ligating metallic brackets after surface treatment with plasma-polymerized hexamethyldisiloxane

2017 ◽  
Vol 22 (4) ◽  
pp. 77-85 ◽  
Author(s):  
Rogerio Amaral Tupinambá ◽  
Cristiane Aparecida de Assis Claro ◽  
Cristiane Aparecida Pereira ◽  
Celestino José Prudente Nobrega ◽  
Ana Paula Rosifini Alves Claro
Keyword(s):  
Surface Roughness ◽  
Surface Treatment ◽  
Bacterial Adhesion ◽  
Chemical Vapor ◽  
Sem Analysis ◽  
Film Deposition ◽  
Orthodontic Brackets ◽  
Test Results ◽  
Conventional Brackets ◽  
Film Layer

ABSTRACT Introduction: Plasma-polymerized film deposition was created to modify metallic orthodontic brackets surface properties in order to inhibit bacterial adhesion. Methods: Hexamethyldisiloxane (HMDSO) polymer films were deposited on conventional (n = 10) and self-ligating (n = 10) stainless steel orthodontic brackets using the Plasma-Enhanced Chemical Vapor Deposition (PECVD) radio frequency technique. The samples were divided into two groups according to the kind of bracket and two subgroups after surface treatment. Scanning Electron Microscopy (SEM) analysis was performed to assess the presence of bacterial adhesion over samples surfaces (slot and wings region) and film layer integrity. Surface roughness was assessed by Confocal Interferometry (CI) and surface wettability, by goniometry. For bacterial adhesion analysis, samples were exposed for 72 hours to a Streptococcus mutans solution for biofilm formation. The values obtained for surface roughness were analyzed using the Mann-Whitney test while biofilm adhesion were assessed by Kruskal-Wallis and SNK test. Results: Significant statistical differences (p< 0.05) for surface roughness and bacterial adhesion reduction were observed on conventional brackets after surface treatment and between conventional and self-ligating brackets; no significant statistical differences were observed between self-ligating groups (p> 0.05). Conclusion: Plasma-polymerized film deposition was only effective on reducing surface roughness and bacterial adhesion in conventional brackets. It was also noted that conventional brackets showed lower biofilm adhesion than self-ligating brackets despite the absence of film.

A Study on the Characteristics of Micro Electropolishing for Stainless Steel

2011 ◽  
Vol 328-330 ◽  
pp. 474-477 ◽  
Author(s):  
Sung Hyun Kim ◽  
Sang Gyun Lee ◽  
Seung Geon Choi ◽  
Eun Sang Lee ◽  
Seung Bok Choi ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Stainless Steel ◽  
Surface Treatment ◽  
Anodic Dissolution ◽  
Current Density ◽  
Electrochemical Reaction ◽  
Treatment Method ◽  
Electrode Gap ◽  
Machining Time ◽  
Burr Size

Electropolishing, the anodic dissolution process without contact with tools, is a surface Treatment method to make a surface planarization using an electrochemical reaction with low current density. Stainless steel can be put various applications which require purity and high precision surface of products. The aim of this study is to investigate the characteristic of electropolishing effect for stainless steel workpieces. In order to analyze the characteristics of electropolishing effect, surface roughness and micro-burr size were measured in terms of machining conditions such as current density, machining time and electrode gap. The tendencies about improvement of surface roughness by electropolishing for stainless steel workpieces were determined.

scholarly journals Adsorption Analysis of Lactoferrin to Titanium, Stainless Steel, Zirconia, and Polymethyl Methacrylate Using the Quartz Crystal Microbalance Method

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Eiji Yoshida ◽  
Tohru Hayakawa
Keyword(s):  
Surface Roughness ◽  
Stainless Steel ◽  
Zeta Potential ◽  
Polymethyl Methacrylate ◽  
Quartz Crystal Microbalance ◽  
Quartz Crystal ◽  
Contact Angles ◽  
Equilibrium Analysis ◽  
Value Analysis ◽  
Biofilm Development

It is postulated that biofilm formation in the oral cavity causes some oral diseases. Lactoferrin is an antibacterial protein in saliva and an important defense factor against biofilm development. We analyzed the adsorbed amount of lactoferrin and the dissociation constant (Kd) of lactoferrin to the surface of different dental materials using an equilibrium analysis technique in a 27 MHz quartz crystal microbalance (QCM) measurement. Four different materials, titanium (Ti), stainless steel (SUS), zirconia (ZrO2) and polymethyl methacrylate (PMMA), were evaluated. These materials were coated onto QCM sensors and the surfaces characterized by atomic force microscopic observation, measurements of surface roughness, contact angles of water, and zeta potential. QCM measurements revealed that Ti and SUS showed a greater amount of lactoferrin adsorption than ZrO2and PMMA. Surface roughness and zeta potential influenced the lactoferrin adsorption. On the contrary, theKdvalue analysis indicated that the adsorbed lactoferrin bound less tightly to the Ti and SUS surfaces than to the ZrO2and PMMA surfaces. The hydrophobic interaction between lactoferrin and ZrO2and PMMA is presumed to participate in better binding of lactoferrin to ZrO2and PMMA surfaces. It was revealed that lactoferrin adsorption behavior was influenced by the characteristics of the material surface.

scholarly journals Adherence of Streptococcus mutans to Fiber-Reinforced Filling Composite and Conventional Restorative Materials

2009 ◽  
Vol 3 (1) ◽  
pp. 227-232 ◽  
Author(s):  
Lippo V.J Lassila ◽  
Sufyan Garoushi ◽  
Johanna Tanner ◽  
Pekka K Vallittu ◽  
Eva Söderling
Keyword(s):  
Surface Roughness ◽  
Streptococcus Mutans ◽  
Polymer Matrix ◽  
Bacterial Adhesion ◽  
Glass Fibers ◽  
Composite Resins ◽  
Fiber Reinforced ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite ◽  
Restorative Materials

Objectives. The aim was to investigate the adhesion of Streptococcus mutans (S. mutans) to a short glass fibers reinforced semi-IPN polymer matrix composite resin. The effect of surface roughness on adhesion was also studied. For comparison, different commercial restorative materials were also evaluated. Materials and Methods. Experimental composite FC resin was prepared by mixing 22.5 wt% of short E-glass fibers, 22.5 wt% of IPN-resin and 55 wt% of silane treated silica fillers using high speed mixing machine. Three direct composite resins (Z250, Grandio and Nulite), resin-modified glass ionomers (Fuji II LC), amalgam (ANA 2000), fiber-reinforced composite (FRC) (everStick and Ribbond), and pre-fabricated ceramic filling insert (Cerana class 1) were tested in this study. Enamel and dentin were used as controls. The specimens (n=3/group) with or without saliva were incubated in a suspension of S. mutans allowing initial adhesion to occur. For the enumeration of cells on the disc surfaces as colony forming units (CFU) the vials with the microbe samples were thoroughly Vortex-treated and after serial dilutions grown anaerobically for 2 days at +37°C on Mitis salivarius agars (Difco) containing bacitracin. Bacterial adhesion was also evaluated by using scanning electron microscopy. Surface roughness (Ra) of the materials was also determined using a surface profilometer. All results were statistically analyzed with one-way analysis of variance (ANOVA). Results. Composite FC resin and other commercial restorative materials showed similar adhesion of S. mutans, while adhesion to dentin and enamel was significantly higher (p<0.05). Surface roughness had no effect on bacterial adhesion. Saliva coating significantly decreased the adhesion for all materials (p<0.05). Composite FC resin had a significantly higher Ra value than control groups (p<0.05). Conclusions. Short fiber-reinforced composite with semi-IPN polymer matrix revealed similar S. mutans adhesion than commercial restorative materials.

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