Biomaterial investigations in dentistry最新文献

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In vitro abrasivity and chemical properties of charcoal-containing dentifrices. 含炭牙垢的体外磨耗性和化学性质。
Biomaterial investigations in dentistry Pub Date : 2020-11-03 DOI: 10.1080/26415275.2020.1838284
Foteini Machla, Aida Mulic, Ellen Bruzell, Håkon Valen, Ida Sofia Refsholt Stenhagen
{"title":"<i>In vitro</i> abrasivity and chemical properties of charcoal-containing dentifrices.","authors":"Foteini Machla,&nbsp;Aida Mulic,&nbsp;Ellen Bruzell,&nbsp;Håkon Valen,&nbsp;Ida Sofia Refsholt Stenhagen","doi":"10.1080/26415275.2020.1838284","DOIUrl":"https://doi.org/10.1080/26415275.2020.1838284","url":null,"abstract":"<p><strong>Objective: </strong>Charcoal-containing dentifrices are gaining popularity, but scientific information on their effect on oral health is scarce. This study investigated properties of dentifrices that may affect dentine abrasivity, as well as their ability to adsorb fluoride, their pH and the presence of harmful substances.</p><p><strong>Materials and methods: </strong>The dentifrices NAO and COCO were subjected to the following analyses: abrasivity, expressed as mean abraded depth and relative dentin abrasivity (RDA), and surface roughness of extracted human molars (<i>n</i> = 30) after simulated brushing; fluoride adsorption measured as concentration change; pH measurements; detection of polycyclic aromatic hydrocarbons by gas chromatography-mass spectrometry. The products were compared to a reference dentifrice (Colgate<sup>®</sup> MaxWhite), positive controls (ISO dentifrice slurry, activated charcoal for laboratory use) and a negative control (distilled water).</p><p><strong>Results: </strong>The mean abraded depths of NAO and COCO were not different (<i>p</i> > .05), but higher than the reference dentifrice and the negative control (<i>p</i> < .05). The RDA values of NAO, COCO and the ISO dentifrice slurry were higher than the reference dentifrice value (<i>p</i> < .05) by up to 10 times. The dentine surface roughness was higher after brushing with NAO, COCO and ISO dentifrice slurry compared to distilled water (<i>p</i> < .05). No change in mean adsorbed fluoride concentration was observed after 24 h (<i>p</i> > .05). Both NAO and COCO were alkaline (pH > 7). Analysis of NAO revealed the presence of naphthalene (112.8 ± 2.0 ng/mL).</p><p><strong>Conclusion: </strong>The charcoal-containing dentifrices were abrasive within acceptable limits set by ISO and did not adsorb fluoride. The presence of naphthalene in one product is a cause for concern.</p>","PeriodicalId":72378,"journal":{"name":"Biomaterial investigations in dentistry","volume":"7 1","pages":"167-174"},"PeriodicalIF":0.0,"publicationDate":"2020-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/26415275.2020.1838284","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38736900","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
Core build-up resin composites: an in-vitro comparative study. 堆芯树脂复合材料:体外比较研究。
Biomaterial investigations in dentistry Pub Date : 2020-11-03 DOI: 10.1080/26415275.2020.1838283
L Spinhayer, A T B Bui, J G Leprince, C M F Hardy
{"title":"Core build-up resin composites: an in-vitro comparative study.","authors":"L Spinhayer,&nbsp;A T B Bui,&nbsp;J G Leprince,&nbsp;C M F Hardy","doi":"10.1080/26415275.2020.1838283","DOIUrl":"https://doi.org/10.1080/26415275.2020.1838283","url":null,"abstract":"<p><strong>Aim: </strong>Resin composite (RC) are commonly used under full crowns. However, independent information is lacking to guide practitioners regarding core RC material selection. This study aimed at comparing the flexural properties of a large selection of commercially-available core build-up RCs (CBU-RC), either light-, self- or dual-cure, to conventional light-cure RCs.</p><p><strong>Methods: </strong>RCs were injected into a 25 × 2×2mm Teflon mold, and either light-cured during 20 s (materials with claimed light-cure characteristics) or covered by aluminum during 10 min (dual- and self-cure CBU-RCs). They were subjected after a one-week water storage at 37.5 °C to three-point bending, and Flexural modulus (<i>E</i> <sub>flex</sub>) and Flexural Strength (<i>σ</i> <sub>f</sub>) were calculated (<i>n</i> = 20). Thermogravimetric analysis (<i>n</i> = 3) was performed to determine inorganic filler content (%).</p><p><strong>Results: </strong>For dual-cure CBU-RCs, both RC (<i>p</i> < .0001) and light-curing (<i>p</i> = .0007) had a significant influence on <i>E</i> <sub>flex</sub>, while only RC was significant for <i>σ</i> <sub>f</sub> (<i>p</i> < .0001). Between all conventional RCs and CBU-RCs, significant differences were observed (<i>p</i> < .0001), both regarding <i>E</i> <sub>flex</sub> and <i>σ</i> <sub>f</sub>, with values ranging from 3.9 to 15.5 GPa and from 76 to 130.3 MPa, respectively. Higher <i>E</i> <sub>flex</sub> values were observed for light-cure RCs than for self- and dual-cure ones, while no clear trend was noticed regarding <i>σ</i> <sub>f</sub>. Good linear correlation was found between inorganic filler content and <i>E</i> <sub>flex</sub> (<i>R</i> <sup>2</sup>=0.85, <i>p</i> < .0001), but not with <i>σ</i> <sub>f</sub> (<i>R</i> <sup>2</sup>=0.08, <i>p</i> = .1609).</p><p><strong>Conclusion: </strong>This work demonstrated a positive influence of light-curing on dual-cure CBU-RC's <i>E</i> <sub>flex</sub>. It also highlighted large differences in flexural properties (especially <i>E</i> <sub>flex</sub>) among the investigated materials, questioning the use of some CBU-RCs as dentin replacement in case of large tissue loss.</p>","PeriodicalId":72378,"journal":{"name":"Biomaterial investigations in dentistry","volume":"7 1","pages":"159-166"},"PeriodicalIF":0.0,"publicationDate":"2020-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/26415275.2020.1838283","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38628635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Editorial. 社论。
Biomaterial investigations in dentistry Pub Date : 2020-10-14 DOI: 10.1080/26415275.2020.1831296
Anne Peutzfeldt, Jon E Dahl
{"title":"Editorial.","authors":"Anne Peutzfeldt,&nbsp;Jon E Dahl","doi":"10.1080/26415275.2020.1831296","DOIUrl":"https://doi.org/10.1080/26415275.2020.1831296","url":null,"abstract":"","PeriodicalId":72378,"journal":{"name":"Biomaterial investigations in dentistry","volume":"7 1","pages":"158"},"PeriodicalIF":0.0,"publicationDate":"2020-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/26415275.2020.1831296","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38592199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
In vitro Candida albicans biofilm formation on different titanium surface topographies. 体外白色念珠菌生物膜在不同钛表面形貌上的形成。
Biomaterial investigations in dentistry Pub Date : 2020-10-09 DOI: 10.1080/26415275.2020.1829489
Mathieu Mouhat, Robert Moorehead, Craig Murdoch
{"title":"<i>In vitro Candida albicans</i> biofilm formation on different titanium surface topographies.","authors":"Mathieu Mouhat,&nbsp;Robert Moorehead,&nbsp;Craig Murdoch","doi":"10.1080/26415275.2020.1829489","DOIUrl":"https://doi.org/10.1080/26415275.2020.1829489","url":null,"abstract":"<p><strong>Objectives: </strong>To investigate if differences in titanium implant surface topography influence <i>Candida albicans</i> biofilm formation.</p><p><strong>Materials and methods: </strong>Titanium discs were prepared and characterized using a profilometer: Group A (<i>R</i> <sub>a</sub> 0.15 µm, smooth), Group B (<i>R</i> <sub>a</sub> 0.64 µm, minimally rough) and Group C (<i>R</i> <sub>a</sub> 1.3 µm, moderately rough). Contact angle and surface free energy (SFE) were determined for each group. Non-preconditioned titanium discs were incubated with <i>C. albicans</i> for 24 h. In additional experiments, the titanium discs were initially coated with human saliva, bovine serum albumin or phosphate-buffered saline for 2 h before incubation with <i>C. albicans</i> for 24 h. The amount of fungal biofilm formation was quantified using a colorimetric assay.</p><p><strong>Results: </strong><i>C. albicans</i> biofilm formation was significantly lower (<i>p</i> < 0.05) on the minimally rough titanium surface compared to smooth and moderately rough surfaces. The titanium surface displaying the lowest SFE (Group B) was associated with significantly lower (<i>p</i> < 0.05) <i>C. albicans</i> biofilm formation than the other two groups. Salivary coating resulted in greater adherence of <i>C. albicans</i> with increased surface roughness.</p><p><strong>Conclusions: </strong>The minimally rough titanium discs displayed lowest SFE compared to smooth and moderately rough surfaces and showed the least <i>C. albicans</i> biofilm formation. This study demonstrated that <i>C. albicans</i> biofilm formation increased in a SFE-dependent manner. These findings suggest that SFE might be a more explanatory factor for <i>C. albicans</i> biofilm formation on titanium surfaces than roughness. The presence of a pellicle coating may negate the impact of SFE on <i>C. albicans</i> biofilm formation on titanium surfaces.</p>","PeriodicalId":72378,"journal":{"name":"Biomaterial investigations in dentistry","volume":"7 1","pages":"146-157"},"PeriodicalIF":0.0,"publicationDate":"2020-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/26415275.2020.1829489","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38562097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Effect of silica nano-spheres on adhesion of oral bacteria and human fibroblasts. 二氧化硅纳米微球对口腔细菌和人类成纤维细胞粘附力的影响
Biomaterial investigations in dentistry Pub Date : 2020-09-15 DOI: 10.1080/26415275.2020.1816175
Pawel Kallas, Hua Kang, Håkon Valen, Håvard Jostein Haugen, Martin Andersson, Mats Hulander
{"title":"Effect of silica nano-spheres on adhesion of oral bacteria and human fibroblasts.","authors":"Pawel Kallas, Hua Kang, Håkon Valen, Håvard Jostein Haugen, Martin Andersson, Mats Hulander","doi":"10.1080/26415275.2020.1816175","DOIUrl":"10.1080/26415275.2020.1816175","url":null,"abstract":"<p><strong>Objective: </strong>This study investigated the effect of surface nano-patterning on adhesion of an oral early commensal colonizer, <i>Streptococcus mitis</i> and the opportunistic pathogen <i>Staphylococcus aureus</i> and human fibroblasts (HDFa) in a laminar flow cell.</p><p><strong>Methods: </strong>Nanostructured surfaces were made by functionalizing glass substrates with 40 nm SiO<sub>2</sub> nanoparticles. Gradients in nanoparticle surface coverage were fabricated to study the effect of nanoparticle spacing within a single experiment. Bacterial adhesion was investigated after 5 min of contact time by subjecting surfaces to a flow in a laminar flow cell. In addition, to examine the particles effect on human cells, the establishment of focal adhesion and spreading of primary human dermal fibroblasts (HDFa) were investigated after 4 and 24 h.</p><p><strong>Results: </strong>Adhesion of both <i>S. aureus</i> and <i>S. mitis</i> decreased on surfaces functionalized with nanoparticles and coincided with higher nanoparticle surface coverage on the surface. Both strains were tested on three separate surfaces. The regression analysis showed that <i>S. mitis</i> was influenced more by surface modification than <i>S. aureus</i>. The establishment of focal adhesions in HDFa cells was delayed on the nanostructured part of the surfaces after both 4 and 24 h of culturing.</p><p><strong>Significance: </strong>In the current manuscript, we have used a flow cell to investigate the effect of nanotopographies on <i>S. aureus</i> and <i>S. mitis</i> adhesion. The present findings are of relevance for design of future implant and prostheses surfaces in order to reduce adhesion of bacteria.</p>","PeriodicalId":72378,"journal":{"name":"Biomaterial investigations in dentistry","volume":"7 1","pages":"134-145"},"PeriodicalIF":0.0,"publicationDate":"2020-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7534277/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38499540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Damage tolerance of six dental zirconias with different translucencies. 六种不同透明度氧化锆的损伤容限。
Biomaterial investigations in dentistry Pub Date : 2020-08-25 DOI: 10.1080/26415275.2020.1809420
Cathrine Å Karlsen, Christian Schriwer, Marit Øilo
{"title":"Damage tolerance of six dental zirconias with different translucencies.","authors":"Cathrine Å Karlsen,&nbsp;Christian Schriwer,&nbsp;Marit Øilo","doi":"10.1080/26415275.2020.1809420","DOIUrl":"https://doi.org/10.1080/26415275.2020.1809420","url":null,"abstract":"<p><strong>Purpose: </strong>High-translucent dental zirconia has been introduced as a suitable material for anterior monolithic restorations. The material composition differs from traditional 3Y-TZP both with regard to yttria content and grain size. Little is known regarding how these alterations affect other properties than translucency and flexural strength. The aim of this study was to evaluate the crack propagation resistance and hardness of dental zirconias with different yttria content and different manufacturing methods.</p><p><strong>Materials and methods: </strong>Measurement of hardness (HV2/5) and crack propagation from the indents (damage tolerance) was performed using a hardness tester(Vicker) on a flat polished surface of five crowns from six different commercial dental zirconias; one hard-machined 3Y-TZP, three soft-machined 3-5% yttria-stabilized zirconias and two soft-machined zirconias with ≥5% yttria content.</p><p><strong>Results: </strong>Damage control varied greatly among dental zirconias with different compositions and fabrication methods. The hard-machined 3Y-TZP had better crack propagation resistance than soft-machined, 3-5% yttria-stabilized zirconias.</p><p><strong>Conslusion: </strong>The ultra-translucent zirconias with ≥5% yttria content had the lowest crack propagation resistance. Hardness is not a suitable indicator for damage tolerance.</p>","PeriodicalId":72378,"journal":{"name":"Biomaterial investigations in dentistry","volume":"7 1","pages":"126-133"},"PeriodicalIF":0.0,"publicationDate":"2020-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/26415275.2020.1809420","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38390407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Efficacy of cavity liners with/without atmospheric cold helium plasma jet for dentin remineralization. 有/无常压冷氦等离子体射流腔衬对牙本质再矿化的影响。
Biomaterial investigations in dentistry Pub Date : 2020-08-17 DOI: 10.1080/26415275.2020.1803074
Hamid Kermanshah, Reza Saeedi, Elham Ahmadi, Ladan Ranjbar Omrani
{"title":"Efficacy of cavity liners with/without atmospheric cold helium plasma jet for dentin remineralization.","authors":"Hamid Kermanshah,&nbsp;Reza Saeedi,&nbsp;Elham Ahmadi,&nbsp;Ladan Ranjbar Omrani","doi":"10.1080/26415275.2020.1803074","DOIUrl":"https://doi.org/10.1080/26415275.2020.1803074","url":null,"abstract":"<p><p><b>Aim:</b> This study aimed to assess the efficacy of cavity liners with/without the atmospheric cold plasma jet (ACPJ) for dentin remineralization.</p><p><strong>Material and methods: </strong>The occlusal third of 24 extracted third molars was cut. An occlusal cavity was prepared in the dentin of each tooth with 1 mm depth and 2 mm diameter and demineralized with 37% phosphoric acid for 1 min. The teeth were randomly divided into 8 groups (<i>n</i> = 3). The first control group only underwent demineralization with phosphoric acid. The second control group underwent demineralization and helium plasma jet. Groups 3 to 5 were filled with calcium hydroxide (CH), RetroMTA (MTA) and Biodentine. Groups 6 to 8 were subjected to ACPJ, and all the groups were sealed with polycarboxylate. After 2 weeks of immersion in water, the teeth were longitudinally sectioned and their mineral content was analyzed using energy-dispersive X-ray spectroscopy (EDX).</p><p><strong>Results: </strong>The interaction effect of ACPJ and type of liner was not significant (<i>p</i> > 0.05). Application of ACPJ in combination with liner had a significant effect on calcium and phosphorous contents (<i>p</i> < .05). The calcium and phosphorous contents in the control groups were significantly lower than other groups (<i>p</i> < .05). The calcium and phosphorous contents in the CH group were higher than the control but significantly lower than the MTA and Biodentine groups. The values in the MTA and Biodentine groups were the same and higher than other groups.</p><p><strong>Conlusion: </strong>All three cavity liners significantly increased the calcium and phosphorous contents of dentin. This increase was significantly greater by the MTA and Biodentine and enhanced by the ACPJ.</p>","PeriodicalId":72378,"journal":{"name":"Biomaterial investigations in dentistry","volume":"7 1","pages":"120-125"},"PeriodicalIF":0.0,"publicationDate":"2020-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/26415275.2020.1803074","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38390405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Fracture resistance, failure mode and stress concentration in a modified endocrown design. 改良内冠设计的抗断裂、破坏模式和应力集中。
Biomaterial investigations in dentistry Pub Date : 2020-08-07 DOI: 10.1080/26415275.2020.1801348
Wiam El Ghoul, Mutlu Özcan, Joao Paulo Mendes Tribst, Ziad Salameh
{"title":"Fracture resistance, failure mode and stress concentration in a modified endocrown design.","authors":"Wiam El Ghoul,&nbsp;Mutlu Özcan,&nbsp;Joao Paulo Mendes Tribst,&nbsp;Ziad Salameh","doi":"10.1080/26415275.2020.1801348","DOIUrl":"https://doi.org/10.1080/26415275.2020.1801348","url":null,"abstract":"<p><strong>Purpose: </strong>The purpose of this study was to assess fracture resistance, failure mode and stress concentration of a modified endocrown preparation design, under axial and lateral forces.</p><p><strong>Materials and methods: </strong>Forty lower molars were divided into two groups (<i>n</i> = 20) and were restored with lithium disilicate glass-ceramic endocrowns following 2 preparation designs: Conventional, with circumferential butt margin 2 mm above the cemento-enamel junction; and Modified, by adding 2 grooves on the mesial side of the vestibular dentinal wall and on the distal side of the lingual dentinal wall. After cementation and thermomechanical cycling loading, half of the samples (<i>n</i> = 10) from each group were loaded axially and the other half (<i>n</i> = 10) was loaded laterally. Fracture resistance and failure modes were observed and the finite element analysis (FEA) was used to identify the stress concentration. Two-way ANOVA and Chi-square tests (<i>α</i> = 0.05) were used for <i>in vitro</i> data analyzes.</p><p><strong>Results: </strong>Fracture resistance showed a statistically significant difference between conventional and modified preparations (<i>p</i> < .001), and between axial and lateral loadings (<i>p</i> < .001). Conventional preparation recorded 2914 N under axial loading and 1516 N under lateral loading, while modified preparation recorded 3329 N under axial loading and 1871 N under lateral loading. FEA showed that retention grooves have reduced the stress concentration under both loads for the tooth and the restoration.</p><p><strong>Conclusion: </strong>Modified endocrown design showed higher fracture resistance than conventional endocrown. Lateral loading displayed a high percentage of severe fracture but under higher load to failure than the values reported for normal masticatory forces.</p>","PeriodicalId":72378,"journal":{"name":"Biomaterial investigations in dentistry","volume":"7 1","pages":"110-119"},"PeriodicalIF":0.0,"publicationDate":"2020-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/26415275.2020.1801348","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38390404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 18
The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of silver nanoparticles against Staphylococcus aureus. 银纳米粒子对金黄色葡萄球菌的最低抑菌浓度(MIC)和最低杀菌浓度(MBC)。
Biomaterial investigations in dentistry Pub Date : 2020-07-23 DOI: 10.1080/26415275.2020.1796674
Prashik Parvekar, Jayant Palaskar, Sandeep Metgud, Rahul Maria, Smita Dutta
{"title":"The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of silver nanoparticles against <i>Staphylococcus aureus</i>.","authors":"Prashik Parvekar, Jayant Palaskar, Sandeep Metgud, Rahul Maria, Smita Dutta","doi":"10.1080/26415275.2020.1796674","DOIUrl":"10.1080/26415275.2020.1796674","url":null,"abstract":"<p><strong>Aim: </strong>To determine the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of silver nanoparticles against <i>Staphylococcus aureus (S. aureus)</i>.<b>Methodology:</b> The antimicrobial efficacy of the silver nanoparticles was determined by the standard methods of Clinical and Laboratory Standards Institute (CLSI). Different concentrations of silver nanoparticles were prepared, and MIC was calculated by tube macro-dilution method. The MBC was determined by the lowest concentration that kills 99.9% of the initial bacterial population. The data were analyzed by ANOVA and Tukey's <i>post hoc</i> test using SPSS software.</p><p><strong>Results: </strong>The MIC and MBC of silver nanoparticles against <i>S. aureus</i> was found to be 0.625 mg/ml.</p><p><strong>Conclusion: </strong>The result obtained from this study shows that silver nanoparticles have potential bactericidal effects against <i>S. aureus</i> at a concentration of 0.625 mg/ml. Silver nanoparticles can be incorporated in the root canal medicaments, sealers and irrigants as it possess potent antimicrobial efficacy against <i>S. aureus</i>.</p>","PeriodicalId":72378,"journal":{"name":"Biomaterial investigations in dentistry","volume":"7 1","pages":"105-109"},"PeriodicalIF":0.0,"publicationDate":"2020-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7470068/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38387615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dentin to dentin adhesion using combinations of resin cements and adhesives from different manufacturers - a novel approach. 牙本质到牙本质的粘合使用树脂水泥和粘合剂的组合从不同的制造商-一种新的方法。
Biomaterial investigations in dentistry Pub Date : 2020-07-16 DOI: 10.1080/26415275.2020.1793677
Elke Seitz, Carl Hjortsjö, Jon E Dahl, Erik Saxegaard
{"title":"Dentin to dentin adhesion using combinations of resin cements and adhesives from different manufacturers - a novel approach.","authors":"Elke Seitz,&nbsp;Carl Hjortsjö,&nbsp;Jon E Dahl,&nbsp;Erik Saxegaard","doi":"10.1080/26415275.2020.1793677","DOIUrl":"https://doi.org/10.1080/26415275.2020.1793677","url":null,"abstract":"<p><strong>Aims: </strong>The aims of this study were to present a novel method to analyse dentin bond strength and to evaluate the bond strength of combining adhesive systems and resin cement from different manufacturers.</p><p><strong>Methods: </strong>Human wisdom teeth were ground flat to the dentin on parallel surfaces and axially cut into two parts. Dentin cylinders (Ø 3 mm) were drilled from one half of each tooth. The other half from each tooth was embedded in epoxy resin with the dentin surface exposed. The specimens were ground with silicone carbide paper and the dentin cylinders were cemented onto the dentin surface of the other half of the same tooth.<b>Materials:</b> Resin cement and adhesive systems from three different manufacturers were used in various combinations (<i>n</i> = 8 per group). Cement and adhesive from the same manufacturer served as control. Shear bond strength (SBS) was measured and fracture modes were registered.<b>Results and conclusions:</b> The highest median SBS value was found in a bonding combination between cement and a non-corresponding adhesive (33.1 MPa) and one of the lowest values was found in one of the controls (15.3 MPa). Cohesive fractures were most frequent. The results indicated that combining adhesive and cement from different manufacturers did not compromise the dentin bonding. The novel test method is recommended for evaluating dentin bonding.</p>","PeriodicalId":72378,"journal":{"name":"Biomaterial investigations in dentistry","volume":"7 1","pages":"96-104"},"PeriodicalIF":0.0,"publicationDate":"2020-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/26415275.2020.1793677","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38387614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
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