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Enamel microcrack inspection using near-infrared light transillumination with fluorescence staining. 近红外光透照荧光染色法检测牙釉质微裂纹。
IF 1.9 4区 医学
Dental materials journal Pub Date : 2025-01-31 Epub Date: 2024-12-03 DOI: 10.4012/dmj.2023-336
Toshio Maseki, Kensuke Furuki, Reo Sugiyama, Miwa Nakazawa, Mei Komoto, Masahiko Maeno
{"title":"Enamel microcrack inspection using near-infrared light transillumination with fluorescence staining.","authors":"Toshio Maseki, Kensuke Furuki, Reo Sugiyama, Miwa Nakazawa, Mei Komoto, Masahiko Maeno","doi":"10.4012/dmj.2023-336","DOIUrl":"10.4012/dmj.2023-336","url":null,"abstract":"<p><p>Enamel microcracks are often apparent in the teeth of elderly individuals. However, accurate clinical diagnosis of enamel microcracks is very difficult. The purpose of this study was to examine the utility of inspections for enamel microcracks using a near-infrared light transillumination device with fluorescence staining. Human upper incisors with typical enamel microcracks were selected. Grayscale pictures of each tooth specimen were then taken by digital camera under visible light as control. Every tooth specimen was stained using indocyanine green solutions, then examined, and photographed under visible light. All digital images were compared with the background enamel surface and measured using image analysis software. Inspection using near-infrared light transillumination with indocyanine green solution was effective for detecting the presence of enamel microcracks. This method offers a non-invasive method of chair-side diagnosis and appears effective for detecting the presence of enamel microcracks.</p>","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":" ","pages":"73-77"},"PeriodicalIF":1.9,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142779626","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
Evaluation of torque moment in self-ligation lingual brackets. 自结扎舌托槽力矩的评价。
IF 1.9 4区 医学
Dental materials journal Pub Date : 2025-01-31 Epub Date: 2024-12-03 DOI: 10.4012/dmj.2024-187
Shingo Mineta, Akira Nakajima, Eiji Tanaka, Shigeki Hanawa, Shinya Horiuchi, Kazumitsu Sekine, Tsuyoshi Sasagawa, Yasuhiro Namura, Takayuki Yoneyama, Mitsuru Motoyoshi
{"title":"Evaluation of torque moment in self-ligation lingual brackets.","authors":"Shingo Mineta, Akira Nakajima, Eiji Tanaka, Shigeki Hanawa, Shinya Horiuchi, Kazumitsu Sekine, Tsuyoshi Sasagawa, Yasuhiro Namura, Takayuki Yoneyama, Mitsuru Motoyoshi","doi":"10.4012/dmj.2024-187","DOIUrl":"10.4012/dmj.2024-187","url":null,"abstract":"<p><p>This study investigates the moments generated when applying third-order bends to lingual brackets with different slot shapes and wires made of different materials. Three types of lingual brackets with different slot shapes: 0.018×0.018-inch square slot self-ligation bracket (AL-bracket); 0.018×0.025-inch slot self-ligation bracket (CL-bracket); 0.018×0.025-inch slot self-ligation bracket (ST-bracket). Wires of three different materials were measured. The torque value generated during torque application was measured using a torque gauge. The AL-bracket had a significantly larger torque moment than the CL- and ST-brackets at the same angles. The CL-bracket had the smallest torque moment of the three for the square wire; however, the CL-bracket revealed a larger torque moment than the ST-bracket for the rectangular wire. The torque moment of Ti-Ni wires was observed the smallest. In lingual orthodontic treatment, the results suggested the shape of the lingual bracket slot and the wire material should be considered when adjusting and applying third-order bends.</p>","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":" ","pages":"78-85"},"PeriodicalIF":1.9,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142779630","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
Fabrication of resin cements capable of disintegrating by near-infrared radiation intended for cemented prosthesis removal. 用于骨水泥假体移除的可通过近红外辐射崩解的树脂水泥的制造。
IF 1.9 4区 医学
Dental materials journal Pub Date : 2025-01-31 Epub Date: 2024-12-03 DOI: 10.4012/dmj.2024-170
Noboru Kajimoto, Michito Maruta, Hirogo Minamisawa, Taira Sato, Kenichi Hamada, Kanji Tsuru
{"title":"Fabrication of resin cements capable of disintegrating by near-infrared radiation intended for cemented prosthesis removal.","authors":"Noboru Kajimoto, Michito Maruta, Hirogo Minamisawa, Taira Sato, Kenichi Hamada, Kanji Tsuru","doi":"10.4012/dmj.2024-170","DOIUrl":"10.4012/dmj.2024-170","url":null,"abstract":"<p><p>The material concept of resin cements capable of disintegrating due to near-infrared (NIR) radiation was verified. The cements were prepared by adding silicon carbide (SiC), which heats upon absorbing NIR rays, and thermally expandable particles (TEPs) to 4-META/MMA-TBB resin cement. The microtensile bond strength (µTBS) and cytocompatibility of the cements were evaluated. The resin cements with 5 mass% SiC and 20-40 mass% TEPs had significantly lower µTBS after NIR radiation than before NIR radiation, and their cytocompatibility was not decreased by SiC and TEPs additions. Furthermore, in vitro thermal damage tests were performed using the resin cement with 5 mass% SiC and 20 mass% TEPs, a typical composition. The results demonstrated conditions that significantly reduced µTBS and minimized thermal damage by NIR radiation. Although these data are only proof of concept, the possibility that dental devices bonded with these cements could be detached by NIR radiation was demonstrated.</p>","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":" ","pages":"24-33"},"PeriodicalIF":1.9,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142779689","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 HEMA and 10-MDP in the bonding agent of a two-step self-etch system on water sorption, elastic modulus, and microtensile bond strength to dentin. 研究了二步自蚀刻体系粘结剂中HEMA和10-MDP对牙本质的吸水性、弹性模量和微拉伸粘结强度的影响。
IF 1.9 4区 医学
Dental materials journal Pub Date : 2025-01-31 Epub Date: 2024-12-03 DOI: 10.4012/dmj.2024-209
Tomoki Iuchi, Kazuhide Yonekura, Yumika Ida, Yutaro Motoyama, Masaomi Ikeda, Kenichi Hamada, Masatoshi Nakajima, Keiichi Hosaka
{"title":"The effect of HEMA and 10-MDP in the bonding agent of a two-step self-etch system on water sorption, elastic modulus, and microtensile bond strength to dentin.","authors":"Tomoki Iuchi, Kazuhide Yonekura, Yumika Ida, Yutaro Motoyama, Masaomi Ikeda, Kenichi Hamada, Masatoshi Nakajima, Keiichi Hosaka","doi":"10.4012/dmj.2024-209","DOIUrl":"10.4012/dmj.2024-209","url":null,"abstract":"<p><p>This study evaluated the effects of HEMA and 10-MDP in the bonding agent in a 2-step self-etch adhesive system, Clearfil SE Bond 2, on water sorption (W<sub>sp</sub>) and elastic modulus (E) of the polymerized bonding agent. The microtensile bond strength (µTBS) to dentin was also evaluated initially and after 10,000 thermal cycles (TC10,000). Four bonding agents were tested: the original, H-free (excluding HEMA), M-free (excluding 10-MDP), and HM-free (excluding HEMA and 10-MDP). HEMA increased W<sub>sp</sub> and decreased E. Initial µTBS (TC0) was highest for the original and lowest for HM-free. After TC10,000, the original maintained the highest µTBS, indicating the importance of HEMA and 10-MDP. TC10,000 did not reduce µTBS for any groups. HEMA and 10-MDP compromised mechanical property and increased water sorption, suggesting these components could potentially compromise adhesive stability.</p>","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":" ","pages":"17-23"},"PeriodicalIF":1.9,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142779690","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
New future dental material: Antimicrobial material "cetylpyridinium chloride-montmorillonite" and implantable material "phosphorylated pullulan". 未来新型牙科材料：抗菌材料“十六烷基氯代吡啶蒙脱土”和植入式材料“磷酸化普鲁兰”。
IF 1.9 4区 医学
Dental materials journal Pub Date : 2025-01-31 Epub Date: 2025-01-11 DOI: 10.4012/dmj.2024-243
Ko Nakanishi, Tsukasa Akasaka, Yasuhiko Abe, Hiroshi Hayashi, Kumiko Yoshihara, Teppei Nakamura, Mariko Nakamura, Bart VAN Meerbeek, Yasuhiro Yoshida
{"title":"New future dental material: Antimicrobial material \"cetylpyridinium chloride-montmorillonite\" and implantable material \"phosphorylated pullulan\".","authors":"Ko Nakanishi, Tsukasa Akasaka, Yasuhiko Abe, Hiroshi Hayashi, Kumiko Yoshihara, Teppei Nakamura, Mariko Nakamura, Bart VAN Meerbeek, Yasuhiro Yoshida","doi":"10.4012/dmj.2024-243","DOIUrl":"10.4012/dmj.2024-243","url":null,"abstract":"<p><p>In dental practice, there are two major diseases: dental caries and periodontal disease. Although dental treatment techniques have advanced along with advances in dental materials, some diseases such as root surface caries and horizontal bone resorption have not yet achieved satisfactory treatment results. Since these diseases are infections caused by oral bacteria, we believe that materials with long-lasting antimicrobial properties would help control these diseases. In addition, materials that can adhere to wet hard tissues would contribute to treatment. In this review, new materials developed based on this idea, the antimicrobial material \"cetylpyridinium chloride-montmorillonite\" and the hard tissue adhesive implantable material \"phosphorylated pullulan\" was introduced.</p>","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":" ","pages":"1-8"},"PeriodicalIF":1.9,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142977965","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 influence of phosphoric acid and primer treatment on the evaluation of the adhesive resin cement/enamel interface. 磷酸和底漆处理对胶粘剂树脂水泥/牙釉质界面评价的影响。
IF 1.9 4区 医学
Dental materials journal Pub Date : 2025-01-31 Epub Date: 2024-12-03 DOI: 10.4012/dmj.2024-214
Mengtian Zhao, Takaaki Sato, Abu Hasan Mohammad Khaled, Masaomi Ikeda, Yasushi Shimada
{"title":"The influence of phosphoric acid and primer treatment on the evaluation of the adhesive resin cement/enamel interface.","authors":"Mengtian Zhao, Takaaki Sato, Abu Hasan Mohammad Khaled, Masaomi Ikeda, Yasushi Shimada","doi":"10.4012/dmj.2024-214","DOIUrl":"10.4012/dmj.2024-214","url":null,"abstract":"<p><p>This study evaluated the influence of phosphoric acid and primer on enamel bonding performance using Panavia V5. Ground bovine enamels were assigned: using K-etchant syringe and Tooth Primer (CT), using K-etchant syringe (PA), using Tooth Primer (TP), neither K-etchant syringe nor Tooth Primer was used (NC). The micro-tensile bond strength values of CT and PA were significantly higher than TP. After thermal cycling, the values were higher in CT and PA. In the leakage test, line-shaped signal pattern at the adhesive interface was detected in NC, and the signal was partially detected in PA and TP. Observation of the adhesive interface after acid and base challenge confirmed tooth-like structures in groups except NC. Large spaces were observed between the enamel and cement in NC. Limited in this study, the lack of application of phosphoric acid or Tooth Primer may affect the enamel bonding performance.</p>","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":" ","pages":"52-59"},"PeriodicalIF":1.9,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142779691","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
Bond strength of self-adhesive resin cement to definitive resin crown materials manufactured by additive and subtractive methods. 自粘树脂水泥与用增减法制造的确定树脂冠材料的粘结强度。
IF 1.9 4区 医学
Dental materials journal Pub Date : 2025-01-31 Epub Date: 2024-12-07 DOI: 10.4012/dmj.2024-111
Elifnaz Ozen Sutuven, Nuray Capa Yildirim
{"title":"Bond strength of self-adhesive resin cement to definitive resin crown materials manufactured by additive and subtractive methods.","authors":"Elifnaz Ozen Sutuven, Nuray Capa Yildirim","doi":"10.4012/dmj.2024-111","DOIUrl":"10.4012/dmj.2024-111","url":null,"abstract":"<p><p>The aim was to compare different surface pretreatments on definitive resin crown materials manufactured additively or subtractively in terms of shear bond strength (SBS) values. Seven subgroups (n=10) were formed from additively manufactured VarseoSmile Crown Plus (VS) and subtractively manufactured Cerasmart270 blocks (CS) according to different surface pretreatments applied; sandblasting (subgroup SB), hydrofluoric acid (subgroup HF), Multi Primer (subgroup MP), subgroup SB-HF, subgroup SB-MP, subgroup SB-HF-MP, and control subgroup. A 3-mm-diameter composite was cemented onto each sample by self-adhesive resin cement. SBS values were measured and failure modes were analyzed after thermocycling. Data were analyzed with two-way ANOVA and Tukey HSD tests. The mean SBS value of VS was found significantly higher than CS (p<0.001). Subgroups SB-HF-MP, HF, SB-MP, and MP of VS exhibited the highest SBS values (p<0.001). The VS exhibited mostly cohesive failure, while CS exhibited mostly adhesive failure.</p>","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":" ","pages":"41-51"},"PeriodicalIF":1.9,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142794553","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
Preparation of CMC/ACP/PHMB nanocomposites and preliminary study on their antibacterial and remineralization functions. CMC/ACP/PHMB纳米复合材料的制备及其抗菌和再矿化功能的初步研究。
IF 1.9 4区 医学
Dental materials journal Pub Date : 2025-01-31 Epub Date: 2024-12-07 DOI: 10.4012/dmj.2024-184
Honglei Guo, Ning Wang, Xuan Ye, Xinye Zhou, Kai Zhang, Xu Zhang
{"title":"Preparation of CMC/ACP/PHMB nanocomposites and preliminary study on their antibacterial and remineralization functions.","authors":"Honglei Guo, Ning Wang, Xuan Ye, Xinye Zhou, Kai Zhang, Xu Zhang","doi":"10.4012/dmj.2024-184","DOIUrl":"10.4012/dmj.2024-184","url":null,"abstract":"<p><p>Caries is a chronic oral disease causing a series of complications. This study aims to develop a material that could remineralize demineralized enamel and simultaneously exert antibacterial effects. A carboxymethyl chitosan (CMC)/amorphous calcium phosphate (ACP)/polyhexamethylene biguanide hydrochloride (PHMB) nanocomposite was synthesized for the first time, and its stability, remineralization ability, and antibacterial properties were investigated in this study. PHMB has excellent antibacterial properties, was used as an additive to stabilize ACP. The enamel surface covered with CMC/ACP/PHMB showed a uniform layer with a similar elemental ratio to that of natural hydroxyapatite and the ratio of crystal diffraction peaks was close to that of natural enamel. The mechanical properties, including hardness and elastic modulus, of the enamel in all experimental groups were restored. The antibacterial effect of 240 mg/L CMC/ACP/PHMB was comparable to that of 0.12% CMC/ACP/chlorhexidine. This study provides a theoretical and experimental basis for the development of novel dual-function anticaries agent.</p>","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":" ","pages":"60-72"},"PeriodicalIF":1.9,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142794555","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
Evaluation with finite element analysis of a ball attachment overdenture prosthesis of a patient. 用有限元分析评价患者的球形附着覆盖义齿修复。
IF 1.9 4区 医学
Dental materials journal Pub Date : 2025-01-31 Epub Date: 2024-12-21 DOI: 10.4012/dmj.2024-252
Hatice Özdemir, Burak Hülagü
{"title":"Evaluation with finite element analysis of a ball attachment overdenture prosthesis of a patient.","authors":"Hatice Özdemir, Burak Hülagü","doi":"10.4012/dmj.2024-252","DOIUrl":"10.4012/dmj.2024-252","url":null,"abstract":"<p><p>This study aimed to apply finite element analysis (FEA) to simulate the oral environment of a patient with an implant-supported overdenture prosthesis. A 3D mandibular model was created for a 45-year-old female patient from CT images, with mucosal thickness measured at 3 mm on average using ultrasonography. The overdenture prosthesis was scanned with an intraoral scanner and placed onto the 3D mandibular model. Displacement of the prosthesis and von Mises stress values of the implant, surrounding bone tissue, implant-prosthesis components, and mucosa were calculated under various masticatory loads. The study found that anterior mastication generated higher stress compared to unilateral and bilateral mastication. The addition of a third implant significantly reduced stress and improved prosthesis stability, particularly during bilateral mastication.</p>","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":" ","pages":"112-120"},"PeriodicalIF":1.9,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142876102","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
Evaluation of resorption rate-controlled calcium carbonate ceramics as a substitute bone material. 可控制吸收速率的碳酸钙陶瓷替代骨材料的评价。
IF 1.9 4区 医学
Dental materials journal Pub Date : 2025-01-31 Epub Date: 2024-12-28 DOI: 10.4012/dmj.2024-120
Shota Umemoto, Toshitake Furusawa, Hidero Unuma, Tomoyo Goto, Tohru Sekino
{"title":"Evaluation of resorption rate-controlled calcium carbonate ceramics as a substitute bone material.","authors":"Shota Umemoto, Toshitake Furusawa, Hidero Unuma, Tomoyo Goto, Tohru Sekino","doi":"10.4012/dmj.2024-120","DOIUrl":"10.4012/dmj.2024-120","url":null,"abstract":"<p><p>Artificial bone, primarily composed of calcium carbonate, demonstrates a higher resorption rate than calcium phosphate-based counterparts, suggesting potential for early bone replacement. Animal experiments using porous calcium carbonate ceramics have demonstrated bone formation superior to commercially available artificial bone after short-term implantation. Long-term implantation has yielded suboptimal results owing to resorption of both newly formed bone and implantation material. We prepared calcium carbonate ceramics added with silica (Si-CaCO<sub>3</sub>) to regulate the resorption rate. After 12 weeks of implantation, Si-CaCO<sub>3</sub> ceramics exhibited bone formation comparable to that of β-tricalcium phosphate (β-TCP) but less variability in the distribution of bone formation within the tissue. An in vitro dissolution test, serving as an indicator of in vivo resorption rate, revealed that Si-CaCO<sub>3</sub> ceramics exhibited an intermediate dissolution rate between high-purity calcium carbonate and β-TCP ceramics. Silica doping in CaCO<sub>3</sub> ceramics presents an effective approach for aligning material resorption with bone formation and growth.</p>","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":" ","pages":"9-16"},"PeriodicalIF":1.9,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142930632","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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