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In-vitro evaluation of wear characteristics, microhardness and color stability of dental restorative CAD/CAM materials. 牙科修复 CAD/CAM 材料磨损特性、微硬度和颜色稳定性的体外评估。
IF 2.5 4区 医学
Dental materials journal Pub Date : 2024-01-30 Epub Date: 2023-12-08 DOI: 10.4012/dmj.2023-071
Ezgi Tüter Bayraktar, Cafer Türkmen, Pınar Yilmaz Atali, Bilge Tarçin, Bora Korkut, Bilal Yaşa
{"title":"In-vitro evaluation of wear characteristics, microhardness and color stability of dental restorative CAD/CAM materials.","authors":"Ezgi Tüter Bayraktar, Cafer Türkmen, Pınar Yilmaz Atali, Bilge Tarçin, Bora Korkut, Bilal Yaşa","doi":"10.4012/dmj.2023-071","DOIUrl":"10.4012/dmj.2023-071","url":null,"abstract":"<p><p>The aim of this study was to demonstrate the vertical and volumetric wear characteristics of CAD/CAM materials. The microhardness and color stability were evaluated. A polymer infiltrated ceramic network CAD/CAM block, resin nanoceramic CAD/CAM blocks, a resin composite, and enamel tissue were investigated. Samples were loaded in a chewing simulator. Other samples were aged and immersed in coffee. Color change was evaluated using the digital image analysis and a spectrophotometer. The data were analyzed using Kolmogorov-Smirnov, Kruskal Wallis, Mann Whitney U, Friedman, Spearman's rho tests (p<0.05). The lowest level of wear was obtained in enamel tissue group 0.20 (Q1:0.14; Q3:0.27μm). Resin composite group 2.48 (Q1:2.12; Q3:2.92) showed lower level of discoloration. No agreement was obtained between the digital image analysis and spectrophotometer data (Spearman's rho -0.314, p=0.014). Similar wear rate to the natural enamel tissue was obtained for Vita Enamic. Digital image analysis was considered a promising technique for monitoring the color change.</p>","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138800201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of thermocycling on the retentive force of the retentive inserts in three denture attachments and their water absorption ability. 热循环对三种义齿附件中固位插件的固位力及其吸水能力的影响。
IF 2.5 4区 医学
Dental materials journal Pub Date : 2024-01-30 Epub Date: 2023-12-26 DOI: 10.4012/dmj.2023-175
Krid Kamonkhantikul, Mansuang Arksornnukit, Woraporn Homsiang
{"title":"Effect of thermocycling on the retentive force of the retentive inserts in three denture attachments and their water absorption ability.","authors":"Krid Kamonkhantikul, Mansuang Arksornnukit, Woraporn Homsiang","doi":"10.4012/dmj.2023-175","DOIUrl":"10.4012/dmj.2023-175","url":null,"abstract":"<p><p>This study aimed to evaluate the thermocycling effect on the retentive force of 3 different retentive inserts in 3 denture attachments (Blue, Pink, Clear retentive inserts in LOCATOR; Blue, Pink, Clear retentive inserts in LOCATOR R-Tx; and White, Yellow, Green retentive inserts in Novaloc) (n=10). Maximum retentive force of each retentive insert was evaluated at baseline, 7-day water storage, and after 5,000-, and 10,000- cycle thermocycling. The water absorption percentage of the retentive inserts was also determined. Comparing between baseline and 7-day water storage, the retentive forces of the LOCATOR and LOCATOR R-Tx groups were significantly reduced (p<0.05), while the retentive force of the Novaloc group was significantly increased (p<0.05). Comparing between 7-day water storage and 10,000-cycle thermocycling, the retentive force of most retentive inserts remained unchanged (p>0.05). The water absorption percentage of the LOCATOR and LOCATOR R-Tx groups was significantly greater than that of the Novaloc group (p<0.05).</p>","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139039643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Surface property changes observed in zirconia during etching with high-concentration hydrofluoric acid over various immersion times. 在高浓度氢氟酸蚀刻过程中观察到氧化锆表面性质的变化。
IF 2.5 4区 医学
Dental materials journal Pub Date : 2024-01-30 Epub Date: 2023-12-02 DOI: 10.4012/dmj.2023-091
Ga-Eul You, Myung-Jin Lim, Kyung-San Min, Mi-Kyung Yu, Kwang-Won Lee
{"title":"Surface property changes observed in zirconia during etching with high-concentration hydrofluoric acid over various immersion times.","authors":"Ga-Eul You, Myung-Jin Lim, Kyung-San Min, Mi-Kyung Yu, Kwang-Won Lee","doi":"10.4012/dmj.2023-091","DOIUrl":"10.4012/dmj.2023-091","url":null,"abstract":"<p><p>This study investigated the degree of phase transformation, surface roughness, and bond strength of zirconia immersed for various times in a 40% hydrofluoric acid (HF) solution. Non-etched sintered zirconia specimens were used as the control, while experimental groups were etched with a 40% HF solution for 5, 10, 20, 40, 80, 160 and 320 min. In each of the control and experimental groups, five specimens for X-ray diffraction analysis, four for surface morphology and surface roughness analysis, and ten for bonding strength measurement were used. As a result, the surface roughness of zirconia increased as the application time increased during the 40% HF etching, but the bond strength between zirconia and resin cement did not increase proportionally. The phase transformation from tetragonal to monoclinic also gradually increased with application time.</p>","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138476972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A novel method to fabricate monetite granules for bone graft applications. 一种制造用于骨移植的莫尼石颗粒的新方法。
IF 2.5 4区 医学
Dental materials journal Pub Date : 2024-01-30 Epub Date: 2023-12-08 DOI: 10.4012/dmj.2023-133
Sunarso, Dyah Rahmawati, Bambang Irawan, Azizah Intan Pangesty
{"title":"A novel method to fabricate monetite granules for bone graft applications.","authors":"Sunarso, Dyah Rahmawati, Bambang Irawan, Azizah Intan Pangesty","doi":"10.4012/dmj.2023-133","DOIUrl":"10.4012/dmj.2023-133","url":null,"abstract":"<p><p>Monetite granules were reported to be able to balance osteoclastic resorption and new bone formation. However, to date, the dehydration of preset brushite has been the well-known method for preparing monetite granules. In the present study, for the first time, monetite granules could be prepared from the phase transformation of calcium sulfate dihydrate (CSD) granules through immersion in NaH<sub>2</sub>PO<sub>4</sub> solution under hydrothermal conditions. CSD granules could be fully transformed into monetite granules at a reaction temperature of 125°C for 24 h. The obtained monetite granules were eight times more soluble in acetate buffer than in Tris-HCl buffer. Furthermore, monetite granules were two times more soluble in acetate buffer but comparable in Tris-HCl buffer compared to xenograft HA. The initial cytotoxicity test indicated that the novel monetite granules were nontoxic. In short, novel monetite granules were successfully prepared, exhibited better solubility in osteoclastic simulation than xenograft HA and were nontoxic.</p>","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138800143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Treatment of saliva contamination of resin core foundation before adhesive luting. 粘接前树脂芯基的唾液污染处理。
IF 2.5 4区 医学
Dental materials journal Pub Date : 2024-01-30 Epub Date: 2023-11-23 DOI: 10.4012/dmj.2023-073
Koji Hayashi, Ryo Ishii, Toshiki Takamizawa, Shunichi Suda, Ryota Aoki, Kana Hayashi, Atsushi Kamimoto, Masashi Miyazaki
{"title":"Treatment of saliva contamination of resin core foundation before adhesive luting.","authors":"Koji Hayashi, Ryo Ishii, Toshiki Takamizawa, Shunichi Suda, Ryota Aoki, Kana Hayashi, Atsushi Kamimoto, Masashi Miyazaki","doi":"10.4012/dmj.2023-073","DOIUrl":"10.4012/dmj.2023-073","url":null,"abstract":"<p><p>This study aimed to evaluate the influence of surface pretreatment on the shear bond strength of resin luting cement to saliva-contaminated resin core foundation. The surface free energy (γ<sup>S</sup>) of the adherent surfaces was examined. The two-way analysis of variance revealed that the surface pretreatment and storage conditions had a significant effect on the strength of the bond to resin core foundation. The γ<sup>S</sup> values of the saliva-contaminated group were significantly lower than those of the other groups, and they tended to improve after surface pretreatment. The tendency of improvement in γ<sup>S</sup> values differed depending on the type of pretreatment agents. Surface treatment with solutions containing functional monomers is effective in removing saliva contaminants from the resin core foundation surfaces and in creating an effective bonding surface for the resin luting cement.</p>","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138440441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Influence of using different translucent composite resins for customizing fiber post on the bond strength of self-adhesive cement to root dentin. 使用不同的半透明复合树脂定制纤维桩对自粘牙胶与根部牙本质粘接强度的影响。
IF 2.5 4区 医学
Dental materials journal Pub Date : 2024-01-30 Epub Date: 2023-12-08 DOI: 10.4012/dmj.2023-184
Reinaldo Oliveira Lima, Antonia Patricia Oliveira Barros, Cristiane De Melo Alencar, Kamila De Figueiredo Pereira, Lucas David Galvani, Luís Geraldo Vaz, Edson Alves De Campos, Milton Carlos Kuga
{"title":"Influence of using different translucent composite resins for customizing fiber post on the bond strength of self-adhesive cement to root dentin.","authors":"Reinaldo Oliveira Lima, Antonia Patricia Oliveira Barros, Cristiane De Melo Alencar, Kamila De Figueiredo Pereira, Lucas David Galvani, Luís Geraldo Vaz, Edson Alves De Campos, Milton Carlos Kuga","doi":"10.4012/dmj.2023-184","DOIUrl":"10.4012/dmj.2023-184","url":null,"abstract":"<p><p>This study evaluated the influence of different translucent resins (Z350 and Opallis) for customizing fiber posts and light-curing the cementation system using different LED equipment (V, Valo or R, Radii-Cal) on the bond strength and adhesive failure pattern at 24 h and 6 months. Eighty roots were prepared and divided into 4 groups (n=20): ZV (Z350 resin and LED Valo), ZR (Z350 resin and LED Radii-Cal), OV (Opallis resin and LED Valo), OR (Opallis resin and LED Radii-Cal). After post space preparation, the fiber post was customized and cemented with self-adhesive cement and light-curing using V or R LED equipment. Bond strength values were submitted to 2-way ANOVA test. ZV and ZR showed higher bond strength values than the other groups at 6 months of evaluation (p<0.05). The Z350 resin has a favorable influence on the bond strength of self-adhesive cement to root dentin, regardless of the LED polymerization equipment used.</p>","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138800171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Induction of mesenchymal stem cell (MSC) differentiation from iPS cells using MSC medium. 利用间充质干细胞培养基诱导iPS细胞向间充质干细胞分化。
IF 2.5 4区 医学
Dental materials journal Pub Date : 2024-01-30 Epub Date: 2023-11-23 DOI: 10.4012/dmj.2023-130
Yufan Wu, Kengo Iwasaki, Yoshiya Hashimoto
{"title":"Induction of mesenchymal stem cell (MSC) differentiation from iPS cells using MSC medium.","authors":"Yufan Wu, Kengo Iwasaki, Yoshiya Hashimoto","doi":"10.4012/dmj.2023-130","DOIUrl":"10.4012/dmj.2023-130","url":null,"abstract":"<p><p>Mesenchymal stem cells (MSCs) and induced pluripotent stem (iPS) cells have great potential as cell sources for tissue engineering and regenerative medicine. This study aimed to investigate whether iPS cells can be differentiated into MSCs using MSCGM, a commercially available MSC culture system. The cells were characterized by flow cytometry, immunostaining, and gene expression analyses. We also examined their potential to differentiate into osteoblasts and chondrocytes. Our results showed that iPS cells cultured in MSCGM (iPS-MSCGM) exhibited a fibroblast-like morphology and expressed CD73 and CD90 genes, as well as positive markers for CD73, CD90, and CD105. Moreover, iPS-MSCGM cells demonstrated the ability to differentiate into osteoblasts and chondrocytes in vitro. This study demonstrates a new and simple method for inducing the differentiation of iPS cells to MSCs using MSCGM.</p>","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138440439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Three-dimensional positions of the center of resistance of the maxillary canine distal movement under orthodontic force loading. 正畸力载荷下上颌犬齿远端运动阻力中心的三维位置。
IF 2.5 4区 医学
Dental materials journal Pub Date : 2024-01-30 Epub Date: 2023-12-02 DOI: 10.4012/dmj.2023-160
Kazuto Terada, Takashi Kameda, Makoto Sakamoto
{"title":"Three-dimensional positions of the center of resistance of the maxillary canine distal movement under orthodontic force loading.","authors":"Kazuto Terada, Takashi Kameda, Makoto Sakamoto","doi":"10.4012/dmj.2023-160","DOIUrl":"10.4012/dmj.2023-160","url":null,"abstract":"<p><p>Using finite-element analysis, we aimed to determine the center of resistance (CRes) of the maxillary canine for setting orthodontic forces. The inclination of the canine was measured by first loading from the mesial to the distal side of the mesial root surface, then the position and direction of the load that minimized the inclination were investigated. The CRes was defined as the set of midpoints of the minimum distances between two inclination lines. Twenty-one CRes values were calculated from a set of seven lines. These CRes data were then aggregated as a 95% confidence ellipsoid of width 0.170×0.016×0.009 mm with center points 4.269, 0.224, and 4.315 mm in the apical, mesial, and lingual directions from the origin, respectively. Further studies are required to effectively apply the CRes identified in this study to clinical applications.</p>","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138476973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Oxide nanoparticles based in magnesium as a potential dental tool to inhibit bacterial activity and promote osteoblast viability. 以镁为基础的氧化物纳米粒子作为一种潜在的牙科工具，可抑制细菌活动并促进成骨细胞的活力。
IF 2.5 4区 医学
Dental materials journal Pub Date : 2024-01-30 Epub Date: 2023-12-08 DOI: 10.4012/dmj.2023-041
Alejandro L Vega-Jiménez, Patricia González-Alva, Adriana Patricia Rodríguez-Hernández, América R Vázquez-Olmos, Blanca Paz-Díaz
{"title":"Oxide nanoparticles based in magnesium as a potential dental tool to inhibit bacterial activity and promote osteoblast viability.","authors":"Alejandro L Vega-Jiménez, Patricia González-Alva, Adriana Patricia Rodríguez-Hernández, América R Vázquez-Olmos, Blanca Paz-Díaz","doi":"10.4012/dmj.2023-041","DOIUrl":"10.4012/dmj.2023-041","url":null,"abstract":"<p><p>Functional nano-fillers are commonly used to reduce bacterial colonization in dentistry. This study aimed to synthesize, characterize, and evaluate the biological effects of magnesium oxide (MgO) nanoparticles (NP) obtained by mechanosynthesis. XRD, TEM, FT-IR, and UV-Vis were used to characterize MgO-NP which were subsequently tested for their activity against Staphylococcus aureus, Enterococcus faecalis and Escherichia coli (E. coli). The effects of MgO-NP on osteoblast cells were also analyzed. Three variables were studied: microbial inhibition by optical density (OD; 570-nm), viability estimated by colony-forming-units, and cell proliferation. The characterization of NP is consistent with nanostructures, minimum inhibitory concentration between 1.5-5 mg/mL, and microbial inhibition at 9.75 ug/mL concentration for E. coli were determined. There were different concentration-dependent effects on cell proliferation. Results were observed with 0.156 mg/mL MgO-NP, which increased cell proliferation at 24 and 48 h. The results suggest the antibacterial suitability of MgO-NP, with tolerable viability of mammalian cells for dental applications.</p>","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138800209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Contribution of micropores in porous zirconia spheres to high optical transparency of dental resin composites. 多孔氧化锆球中的微孔有助于提高牙科树脂复合材料的光学透明度。
IF 2.5 4区 医学
Dental materials journal Pub Date : 2024-01-30 Epub Date: 2023-12-29 DOI: 10.4012/dmj.2023-106
Shingo Mizobuchi, Masataka Ohtani, Kazuya Kobiro
{"title":"Contribution of micropores in porous zirconia spheres to high optical transparency of dental resin composites.","authors":"Shingo Mizobuchi, Masataka Ohtani, Kazuya Kobiro","doi":"10.4012/dmj.2023-106","DOIUrl":"10.4012/dmj.2023-106","url":null,"abstract":"<p><p>Transparency to UV-Vis light and radiopacity of dental resin composites containing zirconia (ZrO<sub>2</sub>) fillers were investigated. The transparency of the resin composite containing porous ZrO<sub>2</sub> spheres was much higher than that containing irregularly shaped ZrO<sub>2</sub> particles. Calcination of the porous ZrO<sub>2</sub> spheres at high temperatures led to dramatically reduced specific surface areas and pore volumes. The transparency of the resin composite containing the calcined porous ZrO<sub>2</sub> spheres drastically decreased as the calcination temperature increased. Then, the enhanced UV-Vis transmittance of the resin composite containing porous ZrO<sub>2</sub> spheres is attributed to the concentration and physical characteristics of the pores. The radiopacity of the resin composites containing porous ZrO<sub>2</sub> spheres increased slightly with increasing calcination temperature. This study revealed that the internal structure of the ZrO<sub>2</sub> fillers mainly influenced in the UV-Vis light transmittance of the resin composites.</p>","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139086291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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