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Mechanical and structural characterization of CAD-CAM materials and enamel of deciduous and permanent teeth.
IF 1.9 4区 医学
Dental materials journal Pub Date : 2025-02-08 DOI: 10.4012/dmj.2024-245
Kanae Wada, Sufyan Garoushi, Junichiro Wada, Tsutomu Iwamoto, Pekka K Vallittu, Lippo Lassila
{"title":"Mechanical and structural characterization of CAD-CAM materials and enamel of deciduous and permanent teeth.","authors":"Kanae Wada, Sufyan Garoushi, Junichiro Wada, Tsutomu Iwamoto, Pekka K Vallittu, Lippo Lassila","doi":"10.4012/dmj.2024-245","DOIUrl":"https://doi.org/10.4012/dmj.2024-245","url":null,"abstract":"<p><p>In clinical applications, computer-aided design/computer-aided manufacturing (CAD-CAM) blocks must exhibit behavior similar to that of deciduous teeth. The purpose of this study was to evaluate the material properties and suitability of CAD-CAM as deciduous teeth. Experimental fiber-reinforced CAD-CAM composites (FRC) and various CAD-CAM (lithium disilicate ceramic: IPS, hybrid ceramic: VEM, five composite resins, and PMMA) and enamels (deciduous and permanent teeth) were subjected to nanoindentation to evaluate material properties, including nanohardness and nano-reduced elastic modulus. Energy dispersive X-ray spectrometry was conducted in combination with SEM to evaluate the elemental and microstructural properties. FRC-fiber (2.94 GPa), VEM-ceramic (3.20 GPa), and IPS (3.63 GPa) showed no statistically significant differences compared to deciduous enamel (3.37 GPa). Various CAD-CAM materials were confirmed to exhibit sufficient nanohardness and nano-reduced elastic modulus and a strong microstructure, indicating their potential for application in the restorative treatment of full crowns of deciduous teeth.</p>","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143381795","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
Effects of PEEK surface treatment using alumina blasting or concentrated sulfuric acid etching in combination with functional monomers on shear bond strength to adhesive cement after artificial aging.
IF 1.9 4区 医学
Dental materials journal Pub Date : 2025-02-08 DOI: 10.4012/dmj.2024-233
Maowei Zhong, Ryuhei Kanda, Susumu Tsuda, Yoshiya Hashimoto, Ruonan Zhang, Takamasa Fujii, Kosuke Kashiwagi
{"title":"Effects of PEEK surface treatment using alumina blasting or concentrated sulfuric acid etching in combination with functional monomers on shear bond strength to adhesive cement after artificial aging.","authors":"Maowei Zhong, Ryuhei Kanda, Susumu Tsuda, Yoshiya Hashimoto, Ruonan Zhang, Takamasa Fujii, Kosuke Kashiwagi","doi":"10.4012/dmj.2024-233","DOIUrl":"https://doi.org/10.4012/dmj.2024-233","url":null,"abstract":"<p><p>The purpose of this study is to investigate the effects of surface treatment methods using polyetheretherketone (PEEK) (with or without a functional monomer-containing primer following treatment with alumina blasting or concentrated sulfuric acid) on the shear bond strength (SBS) of resin luting material after artificial aging. The PEEK specimens were classified into five groups according to their treatment methods: untreated, alumina blasting (AB), concentrated sulfuric acid (SA), alumina blasting+primer (ABP), and concentrated SA+primer (SAP). The SBS score of each group was determined experimentally using a universal testing machine. The SBS tests revealed that the initial bond strengths of ABP and SAP were significantly higher than those of AB and SA. In addition, both SBS after 20,000 thermal cycles remained high (>15 MPa). These results suggest that the ABP and SAP groups are the best predictive methods for evaluating SBS with PEEK and resin cement.</p>","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143381794","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
Effects of repetitive insertion/removal and occlusal load on the retentive force of rest plate-I bar clasps made by selective laser melting. 选择性激光熔化法制作的托板 I 型杆卡扣的重复插入/拔出和咬合负荷对其固位力的影响。
IF 1.9 4区 医学
Dental materials journal Pub Date : 2025-01-31 Epub Date: 2024-11-09 DOI: 10.4012/dmj.2024-271
Yuki Uekubo, Yoshimitsu Kato, Keita Tomono, Mitsuo Kato, Juro Wadachi, Shinji Takemoto, Shuichiro Yamashita
{"title":"Effects of repetitive insertion/removal and occlusal load on the retentive force of rest plate-I bar clasps made by selective laser melting.","authors":"Yuki Uekubo, Yoshimitsu Kato, Keita Tomono, Mitsuo Kato, Juro Wadachi, Shinji Takemoto, Shuichiro Yamashita","doi":"10.4012/dmj.2024-271","DOIUrl":"10.4012/dmj.2024-271","url":null,"abstract":"<p><p>The objective of this study was to investigate the effects of repetitive removal/insertion and a load equivalent to the occlusal force on the retentive force of rest plate-I bar (RPI) clasps fabricated by selective laser melting (SLM) on powder bed fusion. RPI clasp fabricated by SLM and casting were evaluated to the retentive force by repetitive removal/insertion (SLM-RI and Cast-RI), and the retentive force of RPI clasp by SLM was also evaluated by repetitive removal/insertion under load (SLM-L). SLM-RI group was kept superior retentive force during repetitive removal/insertion than Cast-RI group. SLM-L group showed the decrease of retentive force, and all specimens fractured during less than 7,000 repetitive removal/insertion. In SLM-L, the fracture of RPI clasp occurred at minor connector due to stress concentration. In conclusion, the RPI clasp by SLM demonstrated the superior retentive force and fitting for repetitive removal/insertion, yet improvements were necessary to withstand a load equivalent to occlusal force.</p>","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":" ","pages":"93-102"},"PeriodicalIF":1.9,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142615225","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
PEEK stress-shielding with artificial bone for dental implants. 牙种植体用聚醚醚酮人工骨应力屏蔽材料。
IF 1.9 4区 医学
Dental materials journal Pub Date : 2025-01-31 Epub Date: 2025-01-11 DOI: 10.4012/dmj.2024-203
Eiji Yoshida, Rie Nomoto, Yasuharu Amitani, Tohru Hayakawa
{"title":"PEEK stress-shielding with artificial bone for dental implants.","authors":"Eiji Yoshida, Rie Nomoto, Yasuharu Amitani, Tohru Hayakawa","doi":"10.4012/dmj.2024-203","DOIUrl":"10.4012/dmj.2024-203","url":null,"abstract":"<p><p>Dental titanium implants and their surface modifications markedly improve implant biocompatibility. However, studies evaluating the mechanical biocompatibility of implants are scarce. In particular, the analysis of mechanical biocompatibility deficiencies leading to stress shield-induced bone resorption. Recently, we focused on using PEEK as a dental material. This study explored the hypothesis that PEEK implants improve the stress shielding of titanium. In this study, artificial bone surfaces were examined to measure strains on the artificial bone surface under compressive loading with the implants in place. Additionally, 3D image analysis of the fracture state inside the bone tissue was performed using micro-CT (µCT). This hypothesis was supported by µCT imaging analysis of bone tissue changes under stress, which revealed that PEEK implants transfer greater loads than titanium implants. µCT imaging and statistical analysis showed that bone porosity had little effect on stress shielding.</p>","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":" ","pages":"121-127"},"PeriodicalIF":1.9,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142978015","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
Detecting the articular disk in magnetic resonance images of the temporomandibular joint using YOLO series. 应用YOLO系列在颞下颌关节磁共振图像中检测关节盘。
IF 1.9 4区 医学
Dental materials journal Pub Date : 2025-01-31 Epub Date: 2024-12-28 DOI: 10.4012/dmj.2024-186
Yuki Yoshimi, Yuichi Mine, Kohei Yamamoto, Shota Okazaki, Shota Ito, Mizuho Sano, Tzu-Yu Peng, Takashi Nakamoto, Toshikazu Nagasaki, Naoya Kakimoto, Takeshi Murayama, Kotaro Tanimoto
{"title":"Detecting the articular disk in magnetic resonance images of the temporomandibular joint using YOLO series.","authors":"Yuki Yoshimi, Yuichi Mine, Kohei Yamamoto, Shota Okazaki, Shota Ito, Mizuho Sano, Tzu-Yu Peng, Takashi Nakamoto, Toshikazu Nagasaki, Naoya Kakimoto, Takeshi Murayama, Kotaro Tanimoto","doi":"10.4012/dmj.2024-186","DOIUrl":"10.4012/dmj.2024-186","url":null,"abstract":"<p><p>The purpose of this study was to construct an artificial intelligence object detection model to detect the articular disk from temporomandibular joint (TMJ) magnetic resonance (MR) images using YOLO series. The study included two experiments using datasets from different MR imaging machines. A total of 536 MR images were retrospectively examined. The performance of YOLOv5 and YOLOv8 in detecting the TMJ articular disk in both normal and displaced conditions was evaluated. The impact of image-processing techniques, such as histogram equalization (HE) and contrast-limited adaptive HE (CLAHE) on model performance, was also examined. The results showed that the YOLO series could detect the articular disk regardless of displacement, with superior performance on images of normal disk position. The results suggest the applicability of object detection models in improving the diagnosis of TMJ disorders.</p>","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":" ","pages":"103-111"},"PeriodicalIF":1.9,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142930320","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
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
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