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Sealing ability of various endodontic sealers with or without ethylenediaminetetraacetic acid (EDTA) treatment on bovine root canal. 经过或未经乙二胺四乙酸 (EDTA) 处理的各种牙髓封闭剂对牛根管的封闭能力。
IF 2.5 4区 医学
Dental materials journal Pub Date : 2024-04-19 DOI: 10.4012/dmj.2023-305
Yusuke Aigami, T. Sawada, Shunsuke Shimizu, Akiko Asano, Mamoru Noda, Shinji Takemoto
{"title":"Sealing ability of various endodontic sealers with or without ethylenediaminetetraacetic acid (EDTA) treatment on bovine root canal.","authors":"Yusuke Aigami, T. Sawada, Shunsuke Shimizu, Akiko Asano, Mamoru Noda, Shinji Takemoto","doi":"10.4012/dmj.2023-305","DOIUrl":"https://doi.org/10.4012/dmj.2023-305","url":null,"abstract":"This study investigated the wettability and consistency of various endodontic sealers, both inorganic and organic, and evaluated their sealing ability of root canals using the single-cone obturation technique, with and without ethylenediaminetetraacetic acid (EDTA) treatment. Bovine root canals were endodontically prepared and filled in preparation for the dye penetration test with toluidine blue solution. All sealers exhibited contact angles similar to or lower than dentin and displayed superior consistency. Among the sealers, organic sealers used without EDTA treatment showed reduced dye penetration compared to inorganic sealers. However, some inorganic and organic sealers showed dye penetration in the sealer and dentin of root canals subjected to EDTA treatment. In conclusion, the single-cone obturation technique, combined with these endodontic sealers, achieved close contact with root canal dentin due to their wettability and consistency. However, the sealing ability of certain sealers was influenced by EDTA treatment.","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140684291","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 resin-coating techniques on the marginal adaptation and the bond strengths of CAD/CAM-fabricated hybrid ceramic inlays. 树脂涂层技术对 CAD/CAM 制作的混合陶瓷嵌体的边缘适应性和粘接强度的影响。
IF 2.5 4区 医学
Dental materials journal Pub Date : 2024-04-19 DOI: 10.4012/dmj.2023-182
Y. Kanamori, R. Takahashi, T. Nikaido, Hiroshi Nitta, Y. Shimada, J. Tagami, K. Kunzelmann
{"title":"Influence of resin-coating techniques on the marginal adaptation and the bond strengths of CAD/CAM-fabricated hybrid ceramic inlays.","authors":"Y. Kanamori, R. Takahashi, T. Nikaido, Hiroshi Nitta, Y. Shimada, J. Tagami, K. Kunzelmann","doi":"10.4012/dmj.2023-182","DOIUrl":"https://doi.org/10.4012/dmj.2023-182","url":null,"abstract":"This study aimed to evaluate the effects of different resin-coating technique strategies and dual-cure resin luting materials on proximal marginal adaptation and the microtensile bond strengths (μTBSs) of CAD/CAM hybrid ceramic inlays. Extracted human molars were classified into four groups, depending on the coating technique: No coating (None), single coating (1-coating), double coating (2-coating), and flowable resin-coating (Combination). The inlays were bonded with one of the three materials: Panavia V5 (V5), Rely X Ultimate (RXU), and Calibra Ceram (CC). The differences with regard to adaptation were not significant. In the case of μTBS data for V5, no significant differences were observed, whereas for RXU, μTBS values for Combination statistically exceeded those for None and 1-coating. For CC, μTBS values for Combination statistically exceeded those for None, 1-coating, and 2-coating. The coating techniques did not influence the adaptation but influenced the bond strength, and Combination performed the best.","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140684049","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
Detection of senescent cells in the mucosal healing process on type 2 diabetic rats after tooth extraction for biomaterial development. 检测 2 型糖尿病大鼠拔牙后粘膜愈合过程中的衰老细胞，以开发生物材料。
IF 2.5 4区 医学
Dental materials journal Pub Date : 2024-04-19 DOI: 10.4012/dmj.2023-262
Chuyi Luo, Masato Nakagawa, Yoichi Sumi, Yasuhiko Matsushima, Mamoru Uemura, Yoshitomo Honda, Naoyuki Matsumoto
{"title":"Detection of senescent cells in the mucosal healing process on type 2 diabetic rats after tooth extraction for biomaterial development.","authors":"Chuyi Luo, Masato Nakagawa, Yoichi Sumi, Yasuhiko Matsushima, Mamoru Uemura, Yoshitomo Honda, Naoyuki Matsumoto","doi":"10.4012/dmj.2023-262","DOIUrl":"https://doi.org/10.4012/dmj.2023-262","url":null,"abstract":"The delayed mucosal healing of tooth extraction sockets in diabetes has few known effective treatment strategies, and its underlying mechanism remains unknown. Senescent cells may play a pivotal role in this delay, given the well-established association between diabetes, senescent cells, and wound healing. Here, we demonstrated an increase in p21- or p16-positive senescent cells in the epithelial and connective tissues of extraction sockets in type 2 diabetic rats compared to those in control rats. Between 7 and 14 days after tooth extraction, a decrease in senescent cells and improvement in re-epithelialization failure were observed in the epithelium, while an increase in senescent cells and persistence of inflammation were observed in the connective tissue. These results suggest that cellular senescence may have been induced by diabetes and contributed to delayed mucosal healing by suppressing re-epithelization and persistent inflammation. These findings provide new targets for treatment using biomaterials, cells, and drugs.","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140684071","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
Sex estimation from maxillofacial radiographs using a deep learning approach. 利用深度学习方法从颌面部 X 光片估测性别。
IF 2.5 4区 医学
Dental materials journal Pub Date : 2024-04-11 DOI: 10.4012/dmj.2023-253
Hiroki Hase, Y. Mine, S. Okazaki, Yuki Yoshimi, S. Ito, Tzu-Yu Peng, Mizuho Sano, Yuma Koizumi, Naoya Kakimoto, Kotaro Tanimoto, Takeshi Murayama
{"title":"Sex estimation from maxillofacial radiographs using a deep learning approach.","authors":"Hiroki Hase, Y. Mine, S. Okazaki, Yuki Yoshimi, S. Ito, Tzu-Yu Peng, Mizuho Sano, Yuma Koizumi, Naoya Kakimoto, Kotaro Tanimoto, Takeshi Murayama","doi":"10.4012/dmj.2023-253","DOIUrl":"https://doi.org/10.4012/dmj.2023-253","url":null,"abstract":"The purpose of this study was to construct deep learning models for more efficient and reliable sex estimation. Two deep learning models, VGG16 and DenseNet-121, were used in this retrospective study. In total, 600 lateral cephalograms were analyzed. A saliency map was generated by gradient-weighted class activation mapping for each output. The two deep learning models achieved high values in each performance metric according to accuracy, sensitivity (recall), precision, F1 score, and areas under the receiver operating characteristic curve. Both models showed substantial differences in the positions indicated in saliency maps for male and female images. The positions in saliency maps also differed between VGG16 and DenseNet-121, regardless of sex. This analysis of our proposed system suggested that sex estimation from lateral cephalograms can be achieved with high accuracy using deep learning.","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140712994","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
Exploring prosthetic screw rupture in titanium and zirconia superstructures under various conditions. 探索各种条件下钛和氧化锆上部结构中修复螺钉的断裂情况。
IF 2.5 4区 医学
Dental materials journal Pub Date : 2024-04-11 DOI: 10.4012/dmj.2023-285
Myu Hayashi, Yu Kataoka, Yuji Sato, Tokiko Osawa, Kohei Yamashita, Junichi Furuya
{"title":"Exploring prosthetic screw rupture in titanium and zirconia superstructures under various conditions.","authors":"Myu Hayashi, Yu Kataoka, Yuji Sato, Tokiko Osawa, Kohei Yamashita, Junichi Furuya","doi":"10.4012/dmj.2023-285","DOIUrl":"https://doi.org/10.4012/dmj.2023-285","url":null,"abstract":"The fastening mechanics of prosthetic screws under various conditions is crucial to the maintenance of dental implants. This study comprehensively explores the prosthetic screw rupture in titanium (Ti) and zirconia (ZrO2) superstructures under wet and dry conditions. Superstructures were fabricated using digital technology and subjected to tightening torque trials. Experimental results suggested that the implications of the conventionally recommended torque of 15 N•cm differ significantly between dry and wet environments. Both Ti and ZrO2 exhibited preloads of >30 N•cm under dry conditions; however, differences emerged under wet conditions. In addition, screw rupture posed a prominent clinical challenge -particularly during long-term cyclic loading. Notably, the ZrO2 superstructures exhibited a greater resistance to breaking torque than that of Ti. This study underscores the importance of reevaluating torque recommendations with consideration to the distinct characteristics of Ti and ZrO2 in diverse environments.","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140713862","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
Shock absorption and dispersion capability of a novel five-layer mouthguard sheet material. 新型五层护齿片材料的减震和分散能力
IF 2.5 4区 医学
Dental materials journal Pub Date : 2024-04-05 DOI: 10.4012/dmj.2023-179
Miho Motoyoshi, Hiroshi Suzuki, H. Churei, Toshiyuki Nakayama, Tatsuo Yagi, Shiori Sanjo, Takashi Asano, Yasuhiro Tanimoto, Osamu Komiyama
{"title":"Shock absorption and dispersion capability of a novel five-layer mouthguard sheet material.","authors":"Miho Motoyoshi, Hiroshi Suzuki, H. Churei, Toshiyuki Nakayama, Tatsuo Yagi, Shiori Sanjo, Takashi Asano, Yasuhiro Tanimoto, Osamu Komiyama","doi":"10.4012/dmj.2023-179","DOIUrl":"https://doi.org/10.4012/dmj.2023-179","url":null,"abstract":"There is a growing need for a mouthguard sheet material with higher shock absorption and dispersion capacity than those obtained by conventional materials. A five-layer mouthguard sheet material was previously developed using laminated ethylene vinyl acetate and polyolefin copolymer resin. In this study, the shock absorption capacity and dispersion capability of the new sheet material were investigated and compared with those of other materials. Impact testing for the new sheet material showed that the force required to displace the sheet by 1 mm was significantly higher at all thicknesses (p<0.001), whereas the puncture energy and displacement were significantly lower than those for ethylene vinyl acetate (p<0.05). The five-layer mouthguard sheet material successfully absorbed and resisted shock. Therefore, the sheet material potentially increases resistance to applied deformation in teeth and alveolar bone and maintains structure. The five-layer sheet material could expand the range of mouthguard products and help prevent oral trauma.","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140738075","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 etching mode on bonding performance of self-adhesive flowable resin composites to bovine teeth. 蚀刻模式对牛齿自粘流动树脂复合材料粘接性能的影响
IF 2.5 4区 医学
Dental materials journal Pub Date : 2024-04-05 DOI: 10.4012/dmj.2023-226
Kana Hayashi, R. Ishii, T. Takamizawa, R. Aoki, Rei Muto, S. Suda, Atsushi Kamimoto, M. Miyazaki
{"title":"Influence of etching mode on bonding performance of self-adhesive flowable resin composites to bovine teeth.","authors":"Kana Hayashi, R. Ishii, T. Takamizawa, R. Aoki, Rei Muto, S. Suda, Atsushi Kamimoto, M. Miyazaki","doi":"10.4012/dmj.2023-226","DOIUrl":"https://doi.org/10.4012/dmj.2023-226","url":null,"abstract":"This study aimed to evaluate the bonding performance of self-adhesive flowable resin composites (SARs) to bovine teeth. Three SARs, one experimental, and two commercially available products, were used. The study parameters were shear bond strength (SBS), microleakage, and scanning electron microscopy (SEM) evaluation of bonding interfaces. The SBS of the materials was 14.1-15.1 MPa to enamel, 22.2-23.2 MPa to etched enamel, and 7.4-10.7 MPa to dentin. Specimens with pre-etching showed lower microleakage scores than those without pre-etching. SEM images of the interfaces of the materials showed excellent adaptation regardless of the substrate or etching mode. The study results indicate that enamel pre-etching can improve the bonding performance of SARs.","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140739466","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
Novel pit and fissure sealant with nano-CaF2 and antibacterial monomer: Fluoride recharge, microleakage, sealing ability and cytotoxicity. 含有纳米 CaF2 和抗菌单体的新型坑隙封闭剂：氟补给、微渗漏、密封能力和细胞毒性。
IF 2.5 4区 医学
Dental materials journal Pub Date : 2024-04-05 DOI: 10.4012/dmj.2023-166
Xiuzhi Fei, Yuncong Li, Qian Zhang, Chunli Tian, Yue Li, Qiannan Dong, M. Weir, Negar Homayounfar, Thomas W. Oates, Satoshi Imazato, Quan Dai, H. Xu, J. Ruan
{"title":"Novel pit and fissure sealant with nano-CaF2 and antibacterial monomer: Fluoride recharge, microleakage, sealing ability and cytotoxicity.","authors":"Xiuzhi Fei, Yuncong Li, Qian Zhang, Chunli Tian, Yue Li, Qiannan Dong, M. Weir, Negar Homayounfar, Thomas W. Oates, Satoshi Imazato, Quan Dai, H. Xu, J. Ruan","doi":"10.4012/dmj.2023-166","DOIUrl":"https://doi.org/10.4012/dmj.2023-166","url":null,"abstract":"Conventional resin-based sealants release minimal fluoride ions (F) and lack antibacterial activity. The objectives of this study were to: (1) develop a novel bioactive sealant containing calcium fluoride nanoparticles (nCaF2) and antibacterial dimethylaminohexadecyl methacrylate (DMAHDM), and (2) investigate mechanical performance, F recharge and re-release, microleakage, sealing ability and cytotoxicity. Helioseal F served as commercial control. The initial F release from sealant containing 20% nCaF2 was 25-fold that of Helioseal F. After ion exhaustion and recharge, the F re-release from bioactive sealant did not decrease with increasing number of recharge and re-release cycles. Elastic modulus of new bioactive sealant was 44% higher than Helioseal F. The new sealant had excellent sealing, minimal microleakage, and good cytocompatibility. Hence, the nanostructured sealant had substantial and sustained F release and antibacterial activity, good sealing ability and biocompatibility. The novel bioactive nCaF2 sealant is promising to provide long-term F ions for caries prevention.","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140736273","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 attaching mechanical retentive devices onto frameworks on fracture resistance of implant-supported zirconia crowns. 在骨架上安装机械固位装置对种植体支撑的氧化锆冠抗折性的影响。
IF 2.5 4区 医学
Dental materials journal Pub Date : 2024-04-05 DOI: 10.4012/dmj.2023-188
Tatsuro Kobayashi, Junichi Honda, Kei Kubochi, Taro Iwasaki, Yusuke Watanabe, Futoshi Komine
{"title":"Influence of attaching mechanical retentive devices onto frameworks on fracture resistance of implant-supported zirconia crowns.","authors":"Tatsuro Kobayashi, Junichi Honda, Kei Kubochi, Taro Iwasaki, Yusuke Watanabe, Futoshi Komine","doi":"10.4012/dmj.2023-188","DOIUrl":"https://doi.org/10.4012/dmj.2023-188","url":null,"abstract":"This study investigated the fracture load of implant-supported zirconia crowns (IZCs), in which indirect composite resin or feldspathic porcelain was layered onto zirconia frameworks with mechanical retentive devices. Three different zirconia frameworks were assessed: attaching mechanical retentive devices on glaze and opaque porcelain materials (GL and OP groups, respectively), and no attaching mechanical retentive devices (ND group). The frameworks were layered using feldspathic porcelain (FP veneer) and indirect composite resin (IC veneer). Fracture load of the specimens was measured. In FP veneer, the GL group recorded the highest fracture load. In the IC veneer, the GL and OP groups had significantly higher fracture load than the ND group. The fracture resistance of IZCs can be enhanced by applying glaze material before attaching mechanical retentive devices for porcelain layering. The mechanical retentive devices effectively yielded mechanical interlocking between the zirconia frameworks and the IC veneer in GL and OP groups.","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140739715","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 the difference water amounts and hydrolysis times of silane coupling agent on the shear bond strength between lithium disilicate glass ceramic and composite resin. 硅烷偶联剂的不同水量和水解时间对二硅酸锂玻璃陶瓷和复合树脂剪切粘接强度的影响
IF 2.5 4区 医学
Dental materials journal Pub Date : 2024-04-05 DOI: 10.4012/dmj.2023-190
Pimchanok Osotprasit, Sasipin Lauvahutanon, Yosnarong Sirimethawong, Patcharanun Chaiamornsup, P. Jiangkongkho
{"title":"Effect of the difference water amounts and hydrolysis times of silane coupling agent on the shear bond strength between lithium disilicate glass ceramic and composite resin.","authors":"Pimchanok Osotprasit, Sasipin Lauvahutanon, Yosnarong Sirimethawong, Patcharanun Chaiamornsup, P. Jiangkongkho","doi":"10.4012/dmj.2023-190","DOIUrl":"https://doi.org/10.4012/dmj.2023-190","url":null,"abstract":"This study was to evaluate the effect of different water amounts and hydrolysis times of silane coupling agent on shear bond strength between lithium disilicate glass ceramic (LDS) and composite resin. Fourteen groups (n=7) of different water amounts (90, 50 and 10%v/v) and hydrolysis times (5, 19, 75 and 300 s) of experimental silane coupling agent that were prepared for silanization, non-silanization and commercial silane coupling agent (CSC) groups. Two-way analysis of variance (ANOVA) revealed no interaction between water amounts and hydrolysis times of ESC on shear bond strength between LDS and composite resin. One-way ANOVA exhibited the highest shear bond strength and the highest mean percentage in mixed failure mode in the 50%v/v group. Molecular analysis of 13C and 29Si indicated that nuclear magnetic resonance spectra of M2 and M3 hydrolysis species were found in 50%v/v group. The presenting of M2 and M3 which was predominant factor contributing to the highest shear bond strength.","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140737181","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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