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Effect of low-temperature degradation and sintering protocols on the color of monolithic zirconia crowns with different yttria contents. 低温降解和烧结方案对不同钇含量的整体氧化锆冠颜色的影响。
IF 2.5 4区 医学
Dental materials journal Pub Date : 2024-03-29 Epub Date: 2024-01-31 DOI: 10.4012/dmj.2023-194
Shoko Miura, Akikazu Shinya, Hiroyasu Koizumi, Pekka Vallittu, Lippo Lassila, Masanori Fujisawa
{"title":"Effect of low-temperature degradation and sintering protocols on the color of monolithic zirconia crowns with different yttria contents.","authors":"Shoko Miura, Akikazu Shinya, Hiroyasu Koizumi, Pekka Vallittu, Lippo Lassila, Masanori Fujisawa","doi":"10.4012/dmj.2023-194","DOIUrl":"10.4012/dmj.2023-194","url":null,"abstract":"<p><p>This study investigated the effects of low-temperature degradation (LTD) on the L*, a*, and b* values of highly translucent zirconia crowns. Four types of zirconia disks with different yttria contents (IPS e.max ZirCAD LT, IPS e.max ZirCAD MT, IPS e.max ZirCAD MT Multi, IPS e.max ZirCAD Prime, Ivoclar) and two shades (A2 and BL) were used. A crown was manufactured using four types of zirconia and LTD treated. Color measurements were performed, and the color difference (ΔE<sub>00</sub>) before and after LTD was calculated. The microstructure was determined through X-ray fluorescence and X-ray diffractometry. Highly translucent zirconia crowns showed greater changes in the a* and b* values than in the L* value after LTD, regardless of the shade. The Multi2 crowns exhibited a discernible color change due to the LTD treatment. The X-ray fluorescence results did not reveal any apparent change in the microstructure between sintering programs for all zirconia specimens.</p>","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139722039","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
Fracture strength of porcelain veneer on surface-treated zirconia. 表面处理过的氧化锆瓷贴面的断裂强度。
IF 2.5 4区 医学
Dental materials journal Pub Date : 2024-03-29 Epub Date: 2024-02-22 DOI: 10.4012/dmj.2023-139
Hiraku Onuma, Masanao Inokoshi, Kaiqi Xu, Shunsuke Minakuchi
{"title":"Fracture strength of porcelain veneer on surface-treated zirconia.","authors":"Hiraku Onuma, Masanao Inokoshi, Kaiqi Xu, Shunsuke Minakuchi","doi":"10.4012/dmj.2023-139","DOIUrl":"10.4012/dmj.2023-139","url":null,"abstract":"<p><p>In this study, we investigated the effects of surface treatment on the fracture strength of porcelain-veneered zirconia. Highly translucent 4 mol% yttria-stabilized zirconia disks (KATANA HT, Kuraray Noritake Dental) were divided into three surface-treatment groups: 1)as-sintered, 2) alumina sandblasted, and 3) ground. Crystallographic and surface-roughness analyses were conducted for each group. Veneering ceramics (Cerabien ZR, Kuraray Noritake Dental) were applied to the zirconia surfaces. The fracture strengths of the porcelain-veneered zirconia disks were measured using biaxial flexural-strength tests. Crystallographic analysis revealed that grinding and sandblasting increased the fractions of the monoclinic and rhombohedral zirconia phases. The ground specimens had a higher surface roughness than the sandblasted specimens. Weibull analysis showed no significant differences in biaxial flexural strength among the three groups. The results suggest that these surface treatments do not affect the fracture strength of porcelain-veneered zirconia.</p>","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139930467","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
Structure and function of engineered stromal cell-derived factor-1α. 基质细胞衍生因子-1α的结构和功能。
IF 2.5 4区 医学
Dental materials journal Pub Date : 2024-03-29 Epub Date: 2024-02-29 DOI: 10.4012/dmj.2023-247
Fumika Abe, Ayana Nakano, Isao Hirata, Kotaro Tanimoto, Koichi Kato
{"title":"Structure and function of engineered stromal cell-derived factor-1α.","authors":"Fumika Abe, Ayana Nakano, Isao Hirata, Kotaro Tanimoto, Koichi Kato","doi":"10.4012/dmj.2023-247","DOIUrl":"10.4012/dmj.2023-247","url":null,"abstract":"<p><p>To design biologically active, collagen-based scaffolds for bone tissue engineering, we have synthesized chimeric proteins consisting of stromal cell-derived factor-1α (SDF) and the von Willebrand factor A3 collagen-binding domain (CBD). The chimeric proteins were used to evaluate the effect of domain linkage and its order on the structure and function of the SDF and CBD. The structure of the chimeric proteins was analyzed by circular dichroism spectroscopy, while functional analysis was performed by a cell migration assay for the SDF domain and a collagen-binding assay for the CBD domain. Furthermore, computational structural prediction was conducted for the chimeric proteins to examine the consistency with the results of structural and functional analyses. Our structural and functional analyses as well as structural prediction revealed that linking two domains can affect their functions. However, their order had minor effects on the three-dimensional structure of CBD and SDF in the chimeric proteins.</p>","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139989586","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
Comparison of wear and marginal fitness of 3D-printed deciduous molar crowns: An in vitro study. 3D 打印落叶磨牙牙冠的磨损和边缘适应性比较：体外研究
IF 2.5 4区 医学
Dental materials journal Pub Date : 2024-03-29 Epub Date: 2024-02-29 DOI: 10.4012/dmj.2022-143
Bin Lei, Huacui Xiong, Ke Chen
{"title":"Comparison of wear and marginal fitness of 3D-printed deciduous molar crowns: An in vitro study.","authors":"Bin Lei, Huacui Xiong, Ke Chen","doi":"10.4012/dmj.2022-143","DOIUrl":"10.4012/dmj.2022-143","url":null,"abstract":"<p><p>This study aimed to evaluate the wear resistance of primary tooth enamel and 3 kinds of 3D printing materials and to compare the marginal fitness and internal suitability of prefabricated all-ceramic crowns, computer-aided design/manufacturing (CAD/CAM) all-ceramic crowns, and three 3D-printed deciduous molar crowns. Multifunctional friction wear testing machine was used to image the wear surface of the sample and calculate the maximum wear depth and volume loss value of each sample. The internal fit evaluation used the silicon replica method, The four points were measured using scanning electron microscopy (SEM). The obtained data were statistically analyzed using ANOVA and Tukey HSD-test with a fully randomized design (p<0.05). The results showed the wear resistance of E-Dent400 was better than that of PEEK and three different 3D printed materials have good wear resistance compared with the primary tooth enamel. The measured values at M1 and M4 of E-Dent400 were both the smallest.</p>","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139989585","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
Improvement of the setting properties of mineral trioxide aggregate cements using cellulose nanofibrils. 利用纤维素纳米纤维改善三氧化物矿物骨料水泥的凝结性能。
IF 2.5 4区 医学
Dental materials journal Pub Date : 2024-01-30 Epub Date: 2023-12-29 DOI: 10.4012/dmj.2023-220
Hiroki Okuda, Miki Inada, Tomoya Konishi, Nobuyuki Kawashima, Takahiro Wada, Takashi Okiji, Motohiro Uo
{"title":"Improvement of the setting properties of mineral trioxide aggregate cements using cellulose nanofibrils.","authors":"Hiroki Okuda, Miki Inada, Tomoya Konishi, Nobuyuki Kawashima, Takahiro Wada, Takashi Okiji, Motohiro Uo","doi":"10.4012/dmj.2023-220","DOIUrl":"10.4012/dmj.2023-220","url":null,"abstract":"<p><p>Cellulose nanofibrils (CNFs) exhibit excellent mechanical properties and are used to reinforce various composites. The effects of incorporating CNFs into commercial mineral trioxide aggregate (MTA) cements (NEX MTA (NEX) and ProRoot<sup>®</sup> MTA (PR)) on the underwater setting properties, compressive strength, and flowability were estimated in this study. NEX mixed without CNFs disintegrated after water immersion. NEX mixed with CNF-suspended solutions showed good setting properties under water immersion and a similar compressive strength, which was kept in air (100% relative humidity). PR did not degrade after water immersion, regardless of the presence of CNFs, and no significant difference in the compressive strength caused by CNFs incorporation was detected. The relative flowability of the NEX mixture decreased with increasing CNFs content up to 1.0 w/v%. The application of CNF-incorporated MTA in various dental cases is promising because CNFs prevent the water-immersion-dependent collapse of some MTA cements immediately after mixing.</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":"139086292","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
Bioactivity and remineralization potential of modified glass ionomer cement: A systematic review of the impact of calcium and phosphate ion release. 改性玻璃离子水泥的生物活性和再矿化潜力：钙离子和磷酸离子释放影响的系统回顾。
IF 2.5 4区 医学
Dental materials journal Pub Date : 2024-01-30 Epub Date: 2024-01-12 DOI: 10.4012/dmj.2023-132
Nozimjon Tuygunov, Zahra Khairunnisa, Noor Azlin Yahya, Azwatee Abdul Aziz, Myrna Nurlatifah Zakaria, Nigora Amanullaevna Israilova, Arief Cahyanto
{"title":"Bioactivity and remineralization potential of modified glass ionomer cement: A systematic review of the impact of calcium and phosphate ion release.","authors":"Nozimjon Tuygunov, Zahra Khairunnisa, Noor Azlin Yahya, Azwatee Abdul Aziz, Myrna Nurlatifah Zakaria, Nigora Amanullaevna Israilova, Arief Cahyanto","doi":"10.4012/dmj.2023-132","DOIUrl":"10.4012/dmj.2023-132","url":null,"abstract":"<p><p>This systematic review investigates the effectiveness of calcium and phosphate ions release on the bioactivity and remineralization potential of glass ionomer cement (GIC). Electronic databases, including PubMed-MEDLINE, Scopus, and Web of Science, were systematically searched according to PRISMA guidelines. This review was registered in the PROSPERO database. Five eligible studies on modifying GIC with calcium and phosphate ions were included. The risk of bias was assessed using the RoBDEMAT tool. The incorporation of these ions into GIC enhanced its bioactivity and remineralization properties. It promoted hydroxyapatite formation, which is crucial for remineralization, increased pH and inhibited cariogenic bacteria growth. This finding has implications for the development of more effective dental materials. This can contribute to improved oral health outcomes and the management of dental caries, addressing a prevalent and costly oral health issue. Nevertheless, comprehensive longitudinal investigations are needed to evaluate the clinical efficacy of this GIC's modification.</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":"139466218","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
Formulations of NaOCl-based in liquid, gel form or with surfactants on dentin deproteinization before fiber post cementation. 液态、凝胶状或含有表面活性剂的 NaOCl 制剂对纤维后胶结前的牙本质去蛋白作用。
IF 2.5 4区 医学
Dental materials journal Pub Date : 2024-01-30 Epub Date: 2023-12-08 DOI: 10.4012/dmj.2023-187
Joatan Lucas de Sousa Gomes Costa, Antonia Patricia Oliveira Barros, Tatiane Miranda Manzoli, Wilfredo Gustavo Escalante-Otárola, Cristiane de Melo Alencar, Lucas David Galvani, Luis Geraldo Vaz, Milton Carlos Kuga
{"title":"Formulations of NaOCl-based in liquid, gel form or with surfactants on dentin deproteinization before fiber post cementation.","authors":"Joatan Lucas de Sousa Gomes Costa, Antonia Patricia Oliveira Barros, Tatiane Miranda Manzoli, Wilfredo Gustavo Escalante-Otárola, Cristiane de Melo Alencar, Lucas David Galvani, Luis Geraldo Vaz, Milton Carlos Kuga","doi":"10.4012/dmj.2023-187","DOIUrl":"10.4012/dmj.2023-187","url":null,"abstract":"<p><p>The objective of the study was to evaluate the effects of dentin deproteinization protocols for post space using different formulations containing sodium hypochlorite before fiber post cementation with self-adhesive resinous cement. The groups were divided according to the irrigation protocol (DWC, SHS, SHT and SHG). The residue cleanliness, bond strength, adhesive failure pattern, and tag formation at the adhesive interface between the self-adhesive cement and the dentin were evaluated. For this, analysis in scanning electron microscope, push-out test and confocal laser scanning microscopy were performed. The SHT protocol showed the highest residue cleanliness on the dentin surface of the post space (p<0.05). In addition, SHT protocol showed highest bond strength and tag formation in the cervical and middle thirds (p<0.05). Dentin deproteinization with sodium hypochlorite with surfactant provided the best dentin cleaning of residues, bond strength and tag formation after cementation of the fiber post with self-adhesive 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":"138800147","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
The effect of different mechanical retention forms on shear bond strength of rebonding of ceramic brackets. 不同机械固位形式对陶瓷托架再粘接剪切粘接强度的影响
IF 2.5 4区 医学
Dental materials journal Pub Date : 2024-01-30 Epub Date: 2023-12-15 DOI: 10.4012/dmj.2023-164
Ho-Jin Kim, Tae-Yub Kwon, Hyung-Kyu Noh, Hyo-Sang Park
{"title":"The effect of different mechanical retention forms on shear bond strength of rebonding of ceramic brackets.","authors":"Ho-Jin Kim, Tae-Yub Kwon, Hyung-Kyu Noh, Hyo-Sang Park","doi":"10.4012/dmj.2023-164","DOIUrl":"10.4012/dmj.2023-164","url":null,"abstract":"<p><p>The objective of this study is to compare the shear bond strength (SBS) and the morphological characteristics and chemical compositions of the base surface of newly bonded and rebonded ceramic brackets with different mechanical retention bases. Sixty extracted human premolars were divided into the newly bonded and rebonded groups. Ceramic brackets with patterned, laser-etched, and particle-coated patterned bases were randomly bonded to the tooth samples in each group (n=10 per base type). The rebonded brackets exhibited significantly lower SBS than the newly bonded brackets (p<0.05). The main chemical composition of the brackets in both groups was aluminum on the energy-dispersive X-ray spectroscopy. Scanning electron microscopy imaging showed the presence of regular-shaped undercuts or irregular micro-undercuts on the bracket bases which mostly remained intact even after debonding and sandblasting, while coated particles disappeared. The rebonded ceramic brackets with mechanical retention bases exhibited clinically acceptable bond strength regardless of retentive forms.</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":"138800153","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
Comparison of discoloration of ceramic containing 3D printable material and CAD/CAM blocks. 比较含有 3D 可打印材料的陶瓷和 CAD/CAM 块的变色情况。
IF 2.5 4区 医学
Dental materials journal Pub Date : 2024-01-30 Epub Date: 2023-12-26 DOI: 10.4012/dmj.2023-131
Zeliha Gonca Bek Kurklu, Ezgi Sonkaya
{"title":"Comparison of discoloration of ceramic containing 3D printable material and CAD/CAM blocks.","authors":"Zeliha Gonca Bek Kurklu, Ezgi Sonkaya","doi":"10.4012/dmj.2023-131","DOIUrl":"10.4012/dmj.2023-131","url":null,"abstract":"<p><p>This study aimed to clarify aspects of the color and translucency of 3D printed dental material with CAD/CAM blocks. Three different ceramic-containing, resin-based CAD/CAM blocks and a 3D printable resin were evaluated after thermocycled and assessed for their degree of discoloration based on colorant types and storage times. Data were analyzed using repeated-measures analysis of variance followed by Tukey's post-hoc test. All materials in red wine had ∆E<sub>00</sub> values higher than the clinically accepted threshold value. At 1 week and 1 month, the 3D material was statistically significantly more discolored than the other 3 materials (p<0.05). None of the materials exceeded the acceptable threshold value at any time point. The color changes increased over time in resin-based CAD/CAM blocks and 3D printable dental materials. After 1 week and 1 month, there was a statistically significant difference in the color change between the 3D printed material and the CAD/CAM blocks.</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":"139039642","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
Thermophysical properties and bonding with composite resin of premixed mineral trioxide aggregate for use as base material. 预混矿物三氧化二骨料基材的热物理性能及其与复合树脂的粘接。
IF 2.5 4区 医学
Dental materials journal Pub Date : 2024-01-30 Epub Date: 2023-11-23 DOI: 10.4012/dmj.2023-163
Min-Yong Lee, Hi-Won Yoon, Min-Jae Lee, Kwang-Mahn Kim, Jae-Sung Kwon
{"title":"Thermophysical properties and bonding with composite resin of premixed mineral trioxide aggregate for use as base material.","authors":"Min-Yong Lee, Hi-Won Yoon, Min-Jae Lee, Kwang-Mahn Kim, Jae-Sung Kwon","doi":"10.4012/dmj.2023-163","DOIUrl":"10.4012/dmj.2023-163","url":null,"abstract":"<p><p>Dental bases require low thermal conductivity and good mechanical properties, such as bonding with composite resins. This study aims to elucidate the physicochemical properties of premixed mineral trioxide aggregate (MTA) for its suitability as a dental base and to explore the optimal adhesive strategy with composite resin. The thermal conductivity and compressive strength of this premixed MTA are 0.12 W/(m•K) and 93.76 MPa, respectively, Which are deemed adequate for its application as dental base. When bonded to composite resin, the use of 37% phosphoric acid etching before applying the Clearfil SE bond significantly reduced the bonding strength between composite resin and premixed MTA. This was because the compressive strength and Vickers hardness of premixed MTA decreased, and tricalcium silicate was dissolved from the surface during acid etching. Therefore, it is recommended to avoid using 37% phosphoric acid etching when bonding premixed MTA and composite resin as a dental base.</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":"138440440","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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