Biomaterial investigations in dentistry最新文献

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Comparison of smear layer removing efficacy of Cold Atmospheric Pressure (CAP) Plasma Jet with different chelating agents. An ex-vivo study 不同螯合剂对冷常压等离子体射流除污效果的影响。离体研究
Biomaterial investigations in dentistry Pub Date : 2023-10-30 DOI: 10.1080/26415275.2023.2271929
Ankita Kapoor, Pravin Kumar, Ram Prakash, Kirti Chaudhry, Rajat Sharma, Arun Kumar Duraisamy
{"title":"Comparison of smear layer removing efficacy of Cold Atmospheric Pressure (CAP) Plasma Jet with different chelating agents. An ex-vivo study","authors":"Ankita Kapoor, Pravin Kumar, Ram Prakash, Kirti Chaudhry, Rajat Sharma, Arun Kumar Duraisamy","doi":"10.1080/26415275.2023.2271929","DOIUrl":"https://doi.org/10.1080/26415275.2023.2271929","url":null,"abstract":"The present study aimed to assess the effectiveness of different final irrigation regimens (Cold Atmospheric Pressure Plasma Jet, MTAD, and EDTA) in removing the smear layer from intra-radicular dentin using a Scanning Electron Microscope (SEM). Eighty-four mandibular premolars were prepared with ProTaper Universal hand files and were equally divided into four groups i.e. Normal saline (control), EDTA, MTAD and CAP Plasma Jet. Prepared samples in the control, EDTA and MTAD groups were irrigated with 5 milliliters of the irrigant, and it was retained for 2 min. In the CAP Plasma Jet group, the plasma plume was directed towards the canal lumen for 2 min. The smear layer removal of all the groups was evaluated at the coronal, middle and apical thirds. Statistical analysis was performed using Kruskal–Wallis test followed by Dunn’s test. Evaluation by SEM showed that the smear layer removal ability of MTAD and EDTA were significantly better than CAP Plasma Jet (p < 0.05). While CAP Plasma Jet showed results comparable to EDTA in the coronal third. In the middle and apical third of the canal, its effect was comparable to the control group (p > 0.05). MTAD and EDTA aided in better smear layer removal than the CAP Plasma Jet in the coronal, middle, and apical third of the test samples. CAP Plasma jet performed better in the coronal third.","PeriodicalId":72378,"journal":{"name":"Biomaterial investigations in dentistry","volume":"35 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136068235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An in vitro assessment of biaxial flexural strength, degree of monomer conversion, color stability, and ion release in provisional restorations containing Sr-bioactive glass nanoparticles 含锶生物活性玻璃纳米颗粒临时修复体的双轴弯曲强度、单体转化程度、颜色稳定性和离子释放的体外评估
Biomaterial investigations in dentistry Pub Date : 2023-10-14 DOI: 10.1080/26415275.2023.2265393
Chawal Padunglappisit, Napassorn Suwanprateep, Harit Chaiwerawattana, Parichart Naruphontjirakul, Piyaphong Panpisut
{"title":"An <i>in vitro</i> assessment of biaxial flexural strength, degree of monomer conversion, color stability, and ion release in provisional restorations containing Sr-bioactive glass nanoparticles","authors":"Chawal Padunglappisit, Napassorn Suwanprateep, Harit Chaiwerawattana, Parichart Naruphontjirakul, Piyaphong Panpisut","doi":"10.1080/26415275.2023.2265393","DOIUrl":"https://doi.org/10.1080/26415275.2023.2265393","url":null,"abstract":"This study examined the mechanical and chemical properties of an experimental provisional restoration containing Sr-bioactive glass nanoparticles (Sr-BGNPs) compared to commercial provisional materials. The experimental material (TempS10) contained dimethacrylate monomers with added 10 wt% Sr-BGNPs. The degree of monomer conversion (DC) of self-curing (n = 5), biaxial flexural strength (BFS)/modulus (BFM) (n = 5), and color changes (ΔE*00) of materials in red wine (n = 5) were determined. Additionally, ion release (Ca, P, and Sr) in water at 2 weeks was examined (n = 3). The commercial materials tested included polymethyl methacrylate-based provisional material (Unifast) and bis-acrylic materials (Protemp4 and Cooltemp). TempS10 exhibited a comparable degree of monomer conversion (49%) to that of Protemp4 (60%) and Cooltemp (54%) (p > 0.05). The DC of Unifast (81%) was significantly higher than that of other materials (p < 0.05). TempS10 showed a BFS (126 MPa) similar to Cooltemp (102 MPa) and Unifast (123 MPa), but lower than Protemp4 (194 MPa). The immersion time for 2 weeks exhibited no detrimental effect on the strength and modulus of all materials. The highest ΔE*00 at 24 h and 2 weeks was observed with TempS10, followed by Cooltemp, Unifast, and Protemp4. Only TempS10 showed a detectable amount of Ca (0.69 ppm), P (0.12 ppm), and Sr (3.01 ppm). The experimental provisional resin restoration containing Sr-BGNPs demonstrated polymerization and strength comparable to those of bis-acryl provisional restorations but with the added benefit of ion-releasing properties. However, the experimental material demonstrated unsatisfactory color stability.","PeriodicalId":72378,"journal":{"name":"Biomaterial investigations in dentistry","volume":"117 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135804355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Comparison of dental flosses - an investigation of subjective preference and mechanical properties. 牙线的比较——主观偏好和机械性能的调查。
Biomaterial investigations in dentistry Pub Date : 2023-09-22 eCollection Date: 2023-01-01 DOI: 10.1080/26415275.2023.2258919
Zhongjin Huang, Jonathan M Broadbent, Joanne Jung Eun Choi
{"title":"Comparison of dental flosses - an investigation of subjective preference and mechanical properties.","authors":"Zhongjin Huang,&nbsp;Jonathan M Broadbent,&nbsp;Joanne Jung Eun Choi","doi":"10.1080/26415275.2023.2258919","DOIUrl":"10.1080/26415275.2023.2258919","url":null,"abstract":"<p><strong>Objective: </strong>To investigate the properties (tensile strength, roughness, abrasiveness) of different dental flosses and how these properties relate to subjective preference for floss by users.</p><p><strong>Materials and method: </strong>Four flosses of differing compositions were selected (polytetrafluoroethylene (PTFE), nylon, silk, and ultra-high-molecular-weight polyethylene (UHMWPE)). Tensile strength (TS) was measured utilising a universal testing machine (total <i>n</i> = 40). Surface roughness (Ra) was measured on 3D reconstructed models of scanning electron microscope and abrasiveness was measured through block-on-ring tests against human enamel. Subjective preference for floss was measured by asking a sample of 16 individuals to use each floss for an 8-day period using a split-mouth design.</p><p><strong>Results: </strong>The highest TS was found in UHMWPE floss (194.18<math><mo>±</mo></math>24.61 MPa) while the lowest TS was found in PTFE floss (11.78<math><mo>±</mo></math>0.77 MPa). Silk floss had the highest Ra (0.304<math><mo>±</mo></math>0.025 <i>µ</i>m) while PTFE floss had the lowest (0.048<math><mo>±</mo></math>0.003 <i>µ</i>m). In-vitro abrasion testing of the flosses identified no significant differences between the flosses in causing wear on tooth enamel. Subjective ratings of flosses indicated PTFE floss to be most preferred and nylon floss to be least preferred.</p><p><strong>Conclusion: </strong>There was a difference in subjective preference between dental flosses composed of different materials. The PTFE floss was the overall most preferred while the nylon floss was the least preferred. There was also an association between the mechanical properties and preference for their usage, with PTFE floss being the most preferred but having the lowest surface roughness and tensile strength.</p><p><strong>Clinical relevance: </strong>This study compared a wide range of mechanical properties and subject preferences of commercially available dental floss. The results of this study can provide guidance for the recommendation of dental floss for oral hygiene routines.</p>","PeriodicalId":72378,"journal":{"name":"Biomaterial investigations in dentistry","volume":"10 1","pages":"2258919"},"PeriodicalIF":0.0,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/a7/33/IABO_10_2258919.PMC10519255.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41174975","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
Repair bond strength of bulk-fill composites: influence of different primers and direction of debonding stress. 本体填充复合材料的修复粘结强度:不同底漆和脱粘应力方向的影响。
Biomaterial investigations in dentistry Pub Date : 2023-09-22 eCollection Date: 2023-01-01 DOI: 10.1080/26415275.2023.2258924
Pekka Ahlholm, Frode Staxrud, Kirsi Sipilä, Pekka Vallittu
{"title":"Repair bond strength of bulk-fill composites: influence of different primers and direction of debonding stress.","authors":"Pekka Ahlholm,&nbsp;Frode Staxrud,&nbsp;Kirsi Sipilä,&nbsp;Pekka Vallittu","doi":"10.1080/26415275.2023.2258924","DOIUrl":"10.1080/26415275.2023.2258924","url":null,"abstract":"<p><strong>Background: </strong>The purpose of this <i>in vitro</i> study was to evaluate the effect of different adhesion primers on the repair bond strength of bulk-fill resin composite and short-term hydrolytic stability of the repair interface before and after accelerated aging. In addition, direction of debonding stress was examined.</p><p><strong>Materials and methods: </strong>Bulk-fill substrates were aged in water for 14 days at 37 °C. Smooth resin composite surfaces were prepared for the substrates with a superfine grinding paper (FEPA #500, #1200, #2000). Test specimens were produced by attaching bulk-fill composite to the substrate surfaces, using three different primer/bonding systems. Specimens were aged 24 h at 37 °C in water, or thermal cycled (5-55 °C/5,000 cycles). Subsequently, shear bond strength and micro-tensile bond strength were evaluated. In total there were 60 specimens for the shear bond strength and 60 specimens for the micro-tensile bond strength measurements (30 stored in water 24 h, 30 thermal cycled, <i>n</i> = 10 in each primer/bonding mode).</p><p><strong>Results: </strong>The mean shear bond strength was 9.1-13.1 MPa after 24 h water storage and 6.9-10.7 MPa after thermal cycling. The mean micro-tensile bond strength was 28.7-45.8 MPa after 24 h water storage and 22.7-37.9 MPa after thermal cycling.</p><p><strong>Conclusion: </strong>The Ceramic primer (silane containing) seems to perform better than the three-step etch and rinse adhesive or the Composite primer. Shear-type stress had an adverse effect on the repair bond strength of bulk-fill resin composites.</p>","PeriodicalId":72378,"journal":{"name":"Biomaterial investigations in dentistry","volume":"10 1","pages":"2258924"},"PeriodicalIF":0.0,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/2f/63/IABO_10_2258924.PMC10519262.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41162854","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
Contemporary flowable bulk-fill resin-based composites: a systematic review. 当代可流动散装填充树脂基复合材料:系统回顾。
Biomaterial investigations in dentistry Pub Date : 2023-01-01 DOI: 10.1080/26415275.2023.2175685
Elizabeth Parra Gatica, Gerardo Duran Ojeda, Michael Wendler
{"title":"Contemporary flowable bulk-fill resin-based composites: a systematic review.","authors":"Elizabeth Parra Gatica,&nbsp;Gerardo Duran Ojeda,&nbsp;Michael Wendler","doi":"10.1080/26415275.2023.2175685","DOIUrl":"https://doi.org/10.1080/26415275.2023.2175685","url":null,"abstract":"<p><p>Flowable bulk-fill resin-based composites (BF-RBCs) represent a new and interesting alternative for the bulk-fill restorative techniques in the posterior region. However, they comprise a heterogeneous group of materials, with important differences in composition and design. Therefore, the aim of the present systematic review was to compare the main properties of flowable BF-RBCs, including their composition, degree of monomer conversion (DC), polymerization shrinkage and shrinkage stress, as well as flexural strength. The search was conducted following PRISMA guidelines in the Medline (PubMed), Scopus and Web of Science databases. <i>In vitro</i> articles reporting on the DC, polymerization shrinkage/shrinkage stress, and flexural strength of flowable BF-RBCs strength were included. The QUIN risk-of-bias (RoB) tool was used for assessing the study quality. From initially 684 found articles, 53 were included. Values for DC ranged between 19.41 and 93.71%, whereas polymerization shrinkage varied between 1.26 and 10.45%. Polymerization shrinkage stresses reported by most studies ranged between 2 and 3 MPa. Flexural strength was above 80 MPa for most materials. A moderate RoB was observed in most studies. Flowable BF-RBCs meet the requirements to be indicated for bulk fill restoration technique in the posterior region. However, important variations among composition and properties hinder extrapolation of the results to materials different from those reported here. Clinical studies are urgently required to assess their performance under a real working scenario.</p>","PeriodicalId":72378,"journal":{"name":"Biomaterial investigations in dentistry","volume":"10 1","pages":"8-19"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10150621/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9416269","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: 1
Tailoring the monomers to overcome the shortcomings of current dental resin composites - review. 调整单体以克服目前牙科树脂复合材料的缺点-综述。
Biomaterial investigations in dentistry Pub Date : 2023-01-01 DOI: 10.1080/26415275.2023.2191621
Jingwei He, Lippo Lassila, Sufyan Garoushi, Pekka Vallittu
{"title":"Tailoring the monomers to overcome the shortcomings of current dental resin composites - review.","authors":"Jingwei He,&nbsp;Lippo Lassila,&nbsp;Sufyan Garoushi,&nbsp;Pekka Vallittu","doi":"10.1080/26415275.2023.2191621","DOIUrl":"https://doi.org/10.1080/26415275.2023.2191621","url":null,"abstract":"<p><p>Dental resin composites (DRCs) have become the first choice among different restorative materials for direct anterior and posterior restorations in the clinic. Though the properties of DRCs have been improved greatly in recent years, they still have several shortcomings, such as volumetric shrinkage and shrinkage stress, biofilm development, lack of radio-opacity for some specific DRCs, and estrogenicity, which need to be overcome. The resin matrix, composed of different monomers, constitutes the continuous phase and determine the performance of DRCs. Thus, the chemical structure of the monomers plays an important role in modifying the properties of DRCs. Numerous researchers have taken to design and develop novel monomers with specific functions for the purpose of fulfilling the needs in dentistry. In this review, the development of monomers in DRCs were highlighted, especially focusing on strategies aimed at reducing volumetric shrinkage and shrinkage stress, endowing bacteriocidal and antibacterial adhesion activities as well as protein-repelling activity, increasing radio-opacity, and replacing Bis-GMA. The influences of these novel monomers on the properties of DRCs were also discussed.</p>","PeriodicalId":72378,"journal":{"name":"Biomaterial investigations in dentistry","volume":"10 1","pages":"2191621"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10120559/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9393009","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: 1
Deterioration of direct restorative materials under erosive conditions with impact of abrasion and attrition in vitro. 体外磨损和磨耗影响下直接修复材料在侵蚀条件下的劣化。
Biomaterial investigations in dentistry Pub Date : 2023-01-01 DOI: 10.1080/26415275.2023.2202211
Aida Mulic, Amund Ruud, Ida R Stenhagen, Ellen Bruzell, Amela Tulek
{"title":"Deterioration of direct restorative materials under erosive conditions with impact of abrasion and attrition <i>in vitro</i>.","authors":"Aida Mulic,&nbsp;Amund Ruud,&nbsp;Ida R Stenhagen,&nbsp;Ellen Bruzell,&nbsp;Amela Tulek","doi":"10.1080/26415275.2023.2202211","DOIUrl":"https://doi.org/10.1080/26415275.2023.2202211","url":null,"abstract":"<p><strong>Objective: </strong>To compare the cumulative impact of sequential wear on mechanical properties and appearance of a composite resin (CR), Filtek Z250<sup>®</sup>, a glass ionomer GI, Fuji IX GP<sup>®</sup>, and a glass hybrid (GH), Equia Forte<sup>®</sup>.</p><p><strong>Material and methods: </strong>Six equally sized specimens of each material were subjected to wear tests, i.e., simulation of brushing, chewing and acidic liquid exposure, mimicking at least 6 months of clinical exposure. Surface roughness, hardness, substance loss and degree of shade lightness were determined.</p><p><strong>Results: </strong>Following wear tests, significant increase in surface roughness and decrease in hardness values were observed for all materials (<i>p</i> < .05). Significantly larger substance loss was found in Equia Forte<sup>®</sup> specimens compared to Filtek Z250<sup>®</sup> (<i>p</i> < .05), while that of Fuji IX<sup>®</sup> exceeded the measurement capacity of the instrument. Opposite to the two other materials, the shade of Filtek Z250<sup>®</sup> became darker.</p><p><strong>Conclusions: </strong>Sequential wear exposure mimicking abrasion, erosion and attrition to products representing CR, GI and GH, caused weakening and change in appearance of the materials. The composite resin was the most mechanically resistant to the sequential wear.</p>","PeriodicalId":72378,"journal":{"name":"Biomaterial investigations in dentistry","volume":"10 1","pages":"2202211"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10259295/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10005339","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: 1
Silver release from dentine treated with combinations of silver diamine fluoride, potassium iodide and etching. 用氟化银二胺、碘化钾和蚀刻相结合的方法处理牙本质释放的银。
Biomaterial investigations in dentistry Pub Date : 2023-01-01 DOI: 10.1080/26415275.2023.2191634
Frode Staxrud, Rune Becher, Morten Syverud, Naomi Azulay, Håkon Valen
{"title":"Silver release from dentine treated with combinations of silver diamine fluoride, potassium iodide and etching.","authors":"Frode Staxrud,&nbsp;Rune Becher,&nbsp;Morten Syverud,&nbsp;Naomi Azulay,&nbsp;Håkon Valen","doi":"10.1080/26415275.2023.2191634","DOIUrl":"https://doi.org/10.1080/26415275.2023.2191634","url":null,"abstract":"<p><p>For individuals with very high to extremely high caries activity and poor control of daily oral hygiene, a simple treatment for arresting their caries activity is necessary. Silver Diamine Fluoride (SDF) has become increasingly common for this purpose due to its efficacy and ease of application. To avoid or reduce tooth discoloration after SDF treatment potassium iodide (KI) may be applied. However, the release of silver from SDF-treated tooth surfaces may be of concern. Thus, the aim of the present study was to quantify the amount of silver leached in both a short- and long-term perspective. In this <i>in vitro</i> experiment we measured the cumulative release of silver from SDF-treated dentin surfaces with and without imminent application of KI, and with and without phosphoric acid etching as pre-treatment, after 24 h and weekly for four weeks. The release of silver was highest after 24 h for all treatment groups, with a significant drop after this point. When etching was not used, the use of KI did not affect the release of silver. However, when etching was used, there was a significantly lower silver release when KI was also used compared to when KI was not used. This effect was largest for the first two weeks, after which the difference was smaller as all groups released low amounts of silver.</p>","PeriodicalId":72378,"journal":{"name":"Biomaterial investigations in dentistry","volume":"10 1","pages":"2191634"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10120521/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9444374","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
The dose-dependent impact of γ-radiation reinforced with backscatter from titanium on primary human osteoblasts. 钛后向散射增强γ辐射对人原代成骨细胞的剂量依赖性影响。
Biomaterial investigations in dentistry Pub Date : 2023-01-01 DOI: 10.1080/26415275.2023.2209116
Lisa Printzell, Janne Elin Reseland, Nina Frederike Jeppesen Edin, Hanna Tiainen, Jan Eirik Ellingsen
{"title":"The dose-dependent impact of γ-radiation reinforced with backscatter from titanium on primary human osteoblasts.","authors":"Lisa Printzell,&nbsp;Janne Elin Reseland,&nbsp;Nina Frederike Jeppesen Edin,&nbsp;Hanna Tiainen,&nbsp;Jan Eirik Ellingsen","doi":"10.1080/26415275.2023.2209116","DOIUrl":"https://doi.org/10.1080/26415275.2023.2209116","url":null,"abstract":"<p><p>In head and neck cancer patients receiving dental implants prior to radiotherapy, backscatter from titanium increases the radiation dose close to the surface, and may affect the osseointegration. The dose-dependent effects of ionizing radiation on human osteoblasts (hOBs) were investigated. The hOBs were seeded on machined titanium, moderately rough fluoride-modified titanium, and tissue culture polystyrene, and cultured in growth- or osteoblastic differentiation medium (DM). The hOBs were exposed to ionizing γ-irradiation in single doses of 2, 6 or 10 Gy. Twenty-one days post-irradiation, cell nuclei and collagen production were quantified. Cytotoxicity and indicators of differentiation were measured and compared to unirradiated controls. Radiation with backscatter from titanium significantly reduced the number of hOBs but increased the alkaline phosphatase activity in both types of medium when adjusted to the relative cell number on day 21. Irradiated hOBs on the TiF-surface produced similar amounts of collagen as unirradiated controls when cultured in DM. The majority of osteogenic biomarkers significantly increased on day 21 when the hOBs had been exposed to 10 Gy, while the opposite or no effect was observed after lower doses. High doses reinforced with backscatter from titanium resulted in smaller but seemingly more differentiated subpopulations of osteoblasts.</p>","PeriodicalId":72378,"journal":{"name":"Biomaterial investigations in dentistry","volume":"10 1","pages":"2209116"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10190184/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9490107","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: 1
Adhesion of individually formed fiber post adhesively luted with flowable short fiber composite. 单独形成的纤维桩与可流动短纤维复合材料的粘合。
Biomaterial investigations in dentistry Pub Date : 2023-01-01 DOI: 10.1080/26415275.2023.2209593
Anton O Suni, Lippo V J Lassila, Jarno K Tuokko, Sufyan Garoushi, Pekka K Vallittu
{"title":"Adhesion of individually formed fiber post adhesively luted with flowable short fiber composite.","authors":"Anton O Suni,&nbsp;Lippo V J Lassila,&nbsp;Jarno K Tuokko,&nbsp;Sufyan Garoushi,&nbsp;Pekka K Vallittu","doi":"10.1080/26415275.2023.2209593","DOIUrl":"https://doi.org/10.1080/26415275.2023.2209593","url":null,"abstract":"<p><p>This laboratory study aimed to measure the push-out bond strength of individually formed fiber-reinforced composite (FRC) post luted with flowable short fiber-reinforced composite (SFRC) and to evaluate the influence of post coating with light-cured adhesive. Post spaces (Ø 1.7 mm) were drilled into 20 single-rooted decoronated premolar teeth. Post spaces were etched and treated with light-cured universal adhesive (G-Premio Bond). Individually formed FRC posts (Ø 1.5 mm, everStick) were luted either with light-cured SFRC (everX Flow) or conventional particulate-filled (PFC) dual-cure luting cement (G-CEM LinkForce). Half of the posts from each group were treated with dimethacrylate adhesive resin (Stick Resin) for 5 min before luting. After storage in water for two days, the roots were sectioned into 2 mm thick disks (<i>n</i> = 10/per group). Then, a push-out test-setup was used in a universal testing machine to measure the bond strength between post and dentin. The interface between post and SFRC was inspected using optical and scanning electron microscopy (SEM). Data were statistically analyzed using analysis of variance ANOVA (<i>p</i> = .05). Higher bond strength values (<i>p</i> < .05) were obtained when flowable SFRC was used as a post luting material. Resin coating of a post showed no significant effect (<i>p</i> > .05) on bond strength values. Light microscope images showed the ability of discontinuous short fibers in SFRC to penetrate into FRC posts. The use of flowable SFRC as luting material with individually formed FRC posts proved to be a promising method to improve the interface adhesion.</p>","PeriodicalId":72378,"journal":{"name":"Biomaterial investigations in dentistry","volume":"10 1","pages":"2209593"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10177680/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9474398","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}
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