European archives of paediatric dentistry : official journal of the European Academy of Paediatric Dentistry最新文献

{"title":"Comparison of physical and mechanical properties of three different restorative materials in primary teeth: an in vitro study.","authors":"B Keskus,&nbsp;F Oznurhan","doi":"10.1007/s40368-022-00734-6","DOIUrl":"https://doi.org/10.1007/s40368-022-00734-6","url":null,"abstract":"<p><strong>Objective: </strong>Physical and mechanical properties of three different (Ketac Molar Easymix, Dyract XP, Cention N (CN)) restoratives with different ingredients were evaluated.</p><p><strong>Materials and methods: </strong>Four groups were obtained; Group 1: CN LightCure, Group 2: CN SelfCure, Group 3: Ketac Molar Easymix and Group 4: Dyract XP. Disk-shaped samples (n = 10) were prepared and evaluated for the surface roughness test using a profilometer. For the flexure strength test, 2 × 2 × 25 mm bar-shaped samples (n = 10) were prepared, and a three-point bending test was applied to the samples. After preparing cavities for microleakage tests, teeth were restored with restoratives, immersed in dye, and microleakage was assessed. For the microtensile bond strength (µTBS) test, ten sticks were obtained for each group and were stressed under tension.</p><p><strong>Results: </strong>According to surface roughness tests, CN SelfCure showed the lowest value (0.13 μm), while Ketac Molar Easymix showed the highest value (0.28 μm), and significant differences were found between the groups. In flexural strength tests, the highest values were seen in CN SelfCure (82.94 MPa), with statistically significant differences between the groups. When CN SelfCure was applied with an adhesive, the teeth showed statistically decreased leakage than other groups on the gingival side. Higher leakage values were seen on the gingival side than the occlusal side in most groups, and the SelfCure groups showed decreased leakage than the LightCure groups. According to µTBS tests, the highest value was obtained in CN SelfCure-Adhesive group, while the lowest was in CN LightCure-Non-adhesive group. When µTBS was evaluated regardless of adhesive use, the SelfCure groups showed higher µTBS values than the LightCure groups. As a result of the µTBS and microleakage test, the difference between the use of CN with and without adhesive, regardless of the polymerization type, was found to be significant (p  < 0.05).</p><p><strong>Conclusion: </strong>Cention N showed better properties in SelfCure mode, compared to the rest materials tested, but further in vitro and in vivo studies are needed to investigate the effect of different polymerization modes and the oral environmental conditions.</p>","PeriodicalId":520615,"journal":{"name":"European archives of paediatric dentistry : official journal of the European Academy of Paediatric Dentistry","volume":" ","pages":"821-828"},"PeriodicalIF":2.2,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40526869","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation and comparison of cytotoxicity and bioactivity of chemomechanical caries removal agents on stem cells from human exfoliated deciduous teeth.","authors":"V Maru,&nbsp;M Madkaikar,&nbsp;S Shabrish,&nbsp;P Kambli,&nbsp;A Dalvi,&nbsp;P Setia","doi":"10.1007/s40368-021-00684-5","DOIUrl":"https://doi.org/10.1007/s40368-021-00684-5","url":null,"abstract":"<p><strong>Aim: </strong>To investigate and compare the cytotoxicity and bioactivity of CMCR agents on stem cells derived from exfoliated deciduous teeth.</p><p><strong>Methodology: </strong>MTT assay, flow cytometry, Alizarin Red staining and scratch assay were used to assess the cellular viability, apoptosis, calcium matrix deposits and cell migration, respectively. The gene expression of ALP and BMP-2 was measured with RT-PCR. One-way ANOVA and Bonferroni post-test was used for statistical analysis.</p><p><strong>Results: </strong>0.5% Carisolv showed highest cell proliferation and calcium matrix formation, whereas 0.5% Papacarie reported the highest% live cells and cell migration. The highest mRNA expression of ALP and BMP-2 was reported in SHEDs cultured in 0.5% Papacarie (after 72 h incubation) and 0.5% Carisolv (after 24 h incubation), respectively.</p><p><strong>Conclusion: </strong>CMCR agents are biocompatible and bioactive when cultured in stem cells derived from exfoliated primary teeth.</p>","PeriodicalId":520615,"journal":{"name":"European archives of paediatric dentistry : official journal of the European Academy of Paediatric Dentistry","volume":" ","pages":"787-796"},"PeriodicalIF":2.2,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39881223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of the efficacy of a 2-step etch-and-rinse, 2-step self-etch and 1-step self-etch adhesive systems, in class II primary molars restorations. An one year prospective, randomized clinical trial.","authors":"A D Soares,&nbsp;J C Ramos,&nbsp;L C Alves,&nbsp;J L Pereira,&nbsp;F Caramelo,&nbsp;A L Costa","doi":"10.1007/s40368-022-00748-0","DOIUrl":"https://doi.org/10.1007/s40368-022-00748-0","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate the clinical efficacy at 6 months (6 M) and 12 months (12 M) of 3 adhesive strategies (two-step etch-and-rinse; two-step self-etch; one step self-etch) used in composite resin restorations in primary molars.</p><p><strong>Methods: </strong>This randomized clinical study involved 101 class II restorations in primary molars of 34 children (4-8 years old), distributed by 3 groups according to the 3 tested adhesive systems: GI- Clearfil^TMS³Bond Plus (CSB); GII- Clearfil^TMSE Protect Bond (CSEPB); GIII- Prime&Bond®XP (PBXP). Restorations were evaluated according to FDI criteria, immediately after execution, at 6 M and 12 M. All ethical and legal requirements were met. Statistical analysis was performed using IBM®SPSS®v26 and MS Excel® (5% significance level).</p><p><strong>Results: </strong>The aesthetic, biological and most of the functional parameters evaluated remained without significant changes over time. Statistically significant differences were only found regarding the \"marginal adaptation\" parameter at 12 M, with worsening of scores for the three groups (p < 0.001). Comparing the groups, no significant differences were detected between any of the evaluated parameters (aesthetics properties: p = 0.721; functional properties: p = 0.122).</p><p><strong>Conclusions: </strong>After a one-year period, the self-etch adhesives tested presented a clinical efficacy similar to the etch-and-rinse adhesive in restoring class II cavities in primary molars.</p><p><strong>Trial registration number: </strong>ISRCTN11458186.</p>","PeriodicalId":520615,"journal":{"name":"European archives of paediatric dentistry : official journal of the European Academy of Paediatric Dentistry","volume":" ","pages":"845-854"},"PeriodicalIF":2.2,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"33464782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Does silver diammine fluoride concentration influence on bonding to carious dentinal lesions in primary teeth?","authors":"M M Scherer,&nbsp;N F Lunkes,&nbsp;I P M Soares,&nbsp;C A de Oliveira,&nbsp;J C P Imparato,&nbsp;J Hebling,&nbsp;T L Lenzi","doi":"10.1007/s40368-022-00730-w","DOIUrl":"https://doi.org/10.1007/s40368-022-00730-w","url":null,"abstract":"<p><strong>Purpose: </strong>This in vitro study evaluated the microshear bond strength (μSBS) of a universal adhesive after silver diammine fluoride (SDF) application at different concentrations on carious dentinal lesions in primary teeth.</p><p><strong>Methods: </strong>Flat dentin carious-induced surfaces from 40 primary molars were randomly assigned to four experimental groups: without SDF treatment (control), 12% SDF, 30% SDF, or 38% SDF application. After 14 days of storage in artificial saliva at 37 °C, a universal adhesive system (Scotchbond Universal, 3 M ESPE) was applied in the etch-and-rinse mode and resin composite cylinders were built (0.72 mm²). After 24 h of water storage, the μSBS test was performed and the failure mode was determined. Data were analysed using one-way ANOVA and Tukey's post hoc tests (α = 0.05).</p><p><strong>Results: </strong>The application of 38% SDF resulted in higher μSBS mean than control and use of 12% SDF (p = 0.006). No significant differences were observed among control, 12% SDF, and 30% SDF. All specimens tested showed adhesive/mixed failure.</p><p><strong>Conclusion: </strong>The use of SDF does not jeopardise the bonding of a universal adhesive applied in the etch-and-rinse mode to carious dentinal lesions in primary teeth, irrespective of the product concentration.</p>","PeriodicalId":520615,"journal":{"name":"European archives of paediatric dentistry : official journal of the European Academy of Paediatric Dentistry","volume":" ","pages":"813-820"},"PeriodicalIF":2.2,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40626430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative real-time PCR quantification of cytomegalovirus in severe early childhood caries and caries-free children.","authors":"N Nourbakhsh,&nbsp;L Sadri,&nbsp;S Moghim,&nbsp;S Mohammadi","doi":"10.1007/s40368-022-00711-z","DOIUrl":"https://doi.org/10.1007/s40368-022-00711-z","url":null,"abstract":"<p><strong>Purpose: </strong>The present study was undertaken to evaluate cytomegalovirus (CMV) load in carious lesions in children with severe early childhood caries (S-ECC) and compare it with caries-free (CF), healthy children, by quantitative real-time polymerase chain reaction (PCR).</p><p><strong>Materials and methods: </strong>Dental plaque samples were collected from 57 subjects including S-ECC (n = 33) and CF (n = 24) patients. The two groups were matched in terms of age, gender, and socioeconomic status. After deoxyribonucleic acid (DNA) extraction, SYBR Green real-time PCR was used to quantify CMV DNA.</p><p><strong>Results: </strong>The CMV DNA was detected in seven patients in the S-ECC group. The mean of decayed, missing, and filled tooth surfaces (dmfs) was 11.90 ± 5.95 in the S-ECC group. There was no significant difference in gender between the two groups. There was a significant relationship between CMV positivity in children and the S-ECC group (p = 0.043).</p><p><strong>Conclusion: </strong>Results of this study suggest a relationship between the presence of CMV in the oral cavity and S-ECC. We can design clinical trials to confirm these results and improve children's dental care.</p>","PeriodicalId":520615,"journal":{"name":"European archives of paediatric dentistry : official journal of the European Academy of Paediatric Dentistry","volume":" ","pages":"797-801"},"PeriodicalIF":2.2,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40397100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Contemporary management of deep caries in primary teeth: a systematic review and meta-analysis.","authors":"Eirini Stratigaki,&nbsp;Huei Jinn Tong,&nbsp;Kyriaki Seremidi,&nbsp;Dimitrios Kloukos,&nbsp;Monty Duggal,&nbsp;Sotiria Gizani","doi":"10.1007/s40368-021-00666-7","DOIUrl":"https://doi.org/10.1007/s40368-021-00666-7","url":null,"abstract":"<p><strong>Purpose: </strong>To systematically evaluate the available evidence regarding contemporary management of deep caries in vital primary teeth. This review was carried out to facilitate the development of European Academy of Paediatric Dentistry (EAPD) guidelines on deep caries management of primary teeth in paediatric dentistry.</p><p><strong>Methods: </strong>A systematic electronic literature search was conducted to locate studies reporting on interventions and medicaments used for the treatment of deep caries in vital primary teeth. To facilitate this, the Cochrane Library (1992 to up to December 6th, 2020), MEDLINE (PubMed, 1946 to December Week 1, 2020), Ovid MEDLINE (In-Process & Other Non-Indexed Citations, December 6th, 2020); EMBASE (Embase.com, 1974 to December 6th, 2020) and LILACS (1982 to December 6th, 2020) were accessed. Hand search of reference lists of included articles, as well as handbooks and grey literature search was also performed. Study screening was done in duplicate and study inclusions were agreed upon by all authors. Data extraction, and methodological quality and risk of bias assessment were carried out in duplicate for each of the included studies. Overall success rate of each intervention and medicament within the intervention was reported. Meta-analysis was also performed for high-quality studies reporting similar interventions and comparable outcomes in homogeneous population.</p><p><strong>Results: </strong>A total of 1332 papers were identified. Following the primary and secondary assessment process, 36 papers were included in the review. Of these, 8 papers were deemed to represent 4 individual studies, leaving a total of 32 unique studies eventually included in the final analysis. These studies were further categorized into three main vital pulp treatment methods for analysis: indirect pulp capping (IPC), direct pulp capping (DPC), and pulpotomy (PP). Overall, IPC, DPC and PP interventions have high success rates with the reported clinical success rates higher than radiographic success rates. Medicaments used for IPC and DPC have similar success rates. Mineral trioxide aggregate (MTA), ferric sulfate (FS) and formocresol (FC) PP showed similar success rates, and which were all higher than calcium hydroxide (CH). Majority of included studies (n = 22; 63%) were rated low in terms of their potential risk of bias, 6 studies were rated high (17%), and 7 studies were of unclear risk (20%).</p><p><strong>Conclusion: </strong>Within the limitations of the studies included, IPC, DPC, and PP can be recommended as effective treatment modalities for primary teeth with deep caries under specific conditions.</p>","PeriodicalId":520615,"journal":{"name":"European archives of paediatric dentistry : official journal of the European Academy of Paediatric Dentistry","volume":" ","pages":"695-725"},"PeriodicalIF":2.2,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39783149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Direct pulp capping in asymptomatic carious primary molars using three different pulp capping materials: a prospective clinical trial.","authors":"K Chatzidimitriou,&nbsp;G Vadiakas,&nbsp;D Koletsi","doi":"10.1007/s40368-022-00720-y","DOIUrl":"https://doi.org/10.1007/s40368-022-00720-y","url":null,"abstract":"<p><strong>Purpose: </strong>Τo assess the outcome of direct pulp capping in asymptomatic carious primary molars using three pulp capping materials.</p><p><strong>Methods: </strong>In this prospective clinical trial, carious primary molars free of irreversible pulp inflammation signs and symptoms, with negative pain history and pulp exposure following caries removal were included. Teeth were divided into groups: A: Ca(OH)₂, B: Pure Portland cement^®, C: Biodentine™. Following anaesthesia, isolation, caries removal, pulp exposure, hemorrhage control, pulp capping, additional lining in groups A, B, teeth were restored with composite resin. Descriptive statistics, Chi-squared and Fisher's exact tests, Kaplan-Meier survival curves, multivariable random effects Cox regression model were performed.</p><p><strong>Results: </strong>Sixty-six patients (25 girls, 41 boys) with mean age 7.2 (± 1.7) years participated. The mean follow-up time was 13 months. Seventy-nine primary molars were assigned to groups A (n = 27), B (29), C (n = 23). The overall failure was 16% and the distribution by group was: A: 5 teeth, B: 5 teeth, C: 3 teeth. No significant differences in failure rates between capping materials, tooth types, age bands and genders were identified.</p><p><strong>Conclusions: </strong>Direct pulp capping in asymptomatic carious primary molars may be an acceptable option, when treating an exposed pulp with bioceramic materials as pulp capping agents.</p>","PeriodicalId":520615,"journal":{"name":"European archives of paediatric dentistry : official journal of the European Academy of Paediatric Dentistry","volume":" ","pages":"803-811"},"PeriodicalIF":2.2,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40577686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Free sugars and early childhood caries development: a prospective cohort study.","authors":"K Boustedt,&nbsp;J Roswall,&nbsp;S Twetman","doi":"10.1007/s40368-022-00745-3","DOIUrl":"https://doi.org/10.1007/s40368-022-00745-3","url":null,"abstract":"<p><strong>Purpose: </strong>To investigate the impact of giving children younger than 2 years foods and beverages with free sugars on the prevalence of early childhood caries at 5 years.</p><p><strong>Materials and methods: </strong>The study group consisted of 208 children (105 boys and 103 girls) with a complete set of data on nursing, diet and caries from birth to 5 years. We collected feeding habits and dietary data through structured questionnaires at 6, 12, 18 and 24 months and the presence of decayed (d), missed (m) and filled (f) teeth was scored according to the WHO criteria at five years of age. We processed data with chi-square tests and expressed as relative risk (RR) with 95% confidence intervals.</p><p><strong>Results: </strong>At the age of 5 years, 22% of the children had caries. Intake of fruit juice with meals (RR 2.3) and cookies or biscuits at 24 months of age (RR 2.4), as well as fast food consumption at least once every week (RR 2.9), more than doubled the risk for early childhood caries (p < 0.05).</p><p><strong>Conclusions: </strong>Within the limitations of the present study, we found a relationship between consumption of free sugars early in life and dental caries prevalence at 5 years. It therefore seems important to embrace and emphasise the current sugar recommendations in primary and dental care to educate caregivers to avoid serving free sugars to their children before the age of 2 years.</p>","PeriodicalId":520615,"journal":{"name":"European archives of paediatric dentistry : official journal of the European Academy of Paediatric Dentistry","volume":" ","pages":"829-833"},"PeriodicalIF":2.2,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40716933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Clinical effectiveness of restorative materials for the restoration of carious lesions in pulp treated primary teeth: a systematic review.","authors":"S Amend,&nbsp;C Boutsiouki,&nbsp;K Bekes,&nbsp;D Kloukos,&nbsp;S Gizani,&nbsp;N N Lygidakis,&nbsp;R Frankenberger,&nbsp;N Krämer","doi":"10.1007/s40368-022-00744-4","DOIUrl":"https://doi.org/10.1007/s40368-022-00744-4","url":null,"abstract":"<p><strong>Purpose: </strong>To systematically review the clinical performance of restorative materials after pulp therapy of carious primary teeth. It is part 2 of a systematic review on the clinical effectiveness of restorative materials for the management of carious primary teeth supporting the European Academy of Paediatric Dentistry (EAPD) guideline development.</p><p><strong>Methods: </strong>Four electronic databases were systematically searched up to December 28th, 2020. Randomised controlled clinical trials (RCTs) on restorative materials for the restoration of carious primary teeth after pulp therapy were included. Failure rate, annual failure rate (AFR) and reasons for failure were recorded. Studies were sorted by restorative materials. The Cochrane Risk of bias tool for randomised trials (RoB 2.0) was used for quality assessment.</p><p><strong>Results: </strong>After identification of 1685 articles and screening of 41 papers from EAPD review group 1, 5 RCTs were included. Restored primary molars with pulpotomy presented the following AFRs: composite resin (CR) 0%, preformed metal crowns (PMCs) 2.4-2.5%, resin-modified glass-ionomer cement combined with CR 3.8%, compomer 8.9%, and amalgam 14.3%. Maxillary primary incisors receiving pulpectomy exhibited AFRs of 0-2.3% for composite strip crowns (CSCs) depending on the post chosen. Reasons for failure were secondary caries, poor marginal adaptation, loss of retention and fracture of restoration. All studies were classified as high risk of bias. Meta-analyses were not feasible given the clinical/methodological heterogeneity amongst studies.</p><p><strong>Conclusion: </strong>Considering any limitations of this review, CR and PMCs can be recommended for primary molars after pulpotomy, and CSCs for primary incisors receiving pulpectomy. However, a need for further well-designed RCTs was observed.</p>","PeriodicalId":520615,"journal":{"name":"European archives of paediatric dentistry : official journal of the European Academy of Paediatric Dentistry","volume":" ","pages":"761-776"},"PeriodicalIF":2.2,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9637617/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40346451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Metaverse in paediatric dentistry.","authors":"S Duman,&nbsp;D Çelik Özen,&nbsp;Ş B Duman","doi":"10.1007/s40368-022-00733-7","DOIUrl":"https://doi.org/10.1007/s40368-022-00733-7","url":null,"abstract":"","PeriodicalId":520615,"journal":{"name":"European archives of paediatric dentistry : official journal of the European Academy of Paediatric Dentistry","volume":" ","pages":"655-656"},"PeriodicalIF":2.2,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40587458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}