Journal of Orthodontics最新文献

{"title":"Discrepancies between actual and expected orthodontic treatment duration with pre-adjusted edgewise fixed appliances: A case-control study of factors associated with treatment delays.","authors":"Linda Sangalli, Diana Tucker De Sanctis, Jahnavi Rao, Quang Nguyen, Kenedy Fomenko, Tina Shekari, Anna Alessandri-Bonetti, Fabio Savoldi","doi":"10.1177/14653125261444745","DOIUrl":"https://doi.org/10.1177/14653125261444745","url":null,"abstract":"<p><strong>Objectives: </strong>To explore the prevalence of discrepancies between estimated and actual orthodontic treatment duration and identify predictors of treatment delays.</p><p><strong>Material and methods: </strong>A total of 96 patients (62.5% female; age = 15.6 ± 6.8 years) who completed an orthodontic treatment with pre-adjusted edgewise fixed appliances between 2015 and 2023 were retrospectively included. Differences between actual and estimated treatment duration >3 months were classified as discrepancies and categorized as \"overestimation\" or \"underestimation.\" Such discrepancies were compared on demographics, COVID period, and orthodontic parameters using Student's <i>t</i>-tests and chi-square tests, as appropriate. Predictors of underestimated treatment duration were assessed with logistic regression analysis.</p><p><strong>Results: </strong>Actual treatment duration significantly differed from the estimated duration (26.5 ± 9.6 vs. 21.6 ± 3.6 months; <i>P</i> <0.001), with 65.6% cases exhibiting treatment discrepancy (<i>P</i> = 0.003) and 61.5% of them being underestimated (<i>P</i> = 0.032). Cases with underestimated durations more commonly displayed posterior crossbite (30.9% vs. 5.4%; <i>P</i> = 0.004), larger SNA angle (83.7 ± 3.7 vs. 78.8 ± 3.8; <i>P</i> = 0.005), bracket debonding (53.4% vs. 31.4%; <i>P</i> = 0.039; odds ratio [OR] = 2.51, 95% confidence interval [CI] = 1.04-6.04), and were most likely conducted during COVID period (33.9% vs. 10.8%; <i>P</i> = 0.011; OR = 4.23, 95% CI = 1.31-13.62) compared to overestimated ones. Posterior crossbite (<i>P</i> = 0.006) and COVID period (<i>P</i> = 0.007) were significant predictors of treatment underestimation.</p><p><strong>Conclusions: </strong>Approximately two-thirds of orthodontic treatments showed discrepancies between estimated and actual duration, with 61.5% being underestimated especially in presence of posterior crossbite and during COVID period.</p>","PeriodicalId":16677,"journal":{"name":"Journal of Orthodontics","volume":" ","pages":"14653125261444745"},"PeriodicalIF":1.5,"publicationDate":"2026-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147839274","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":"A preliminary survey of cone-beam computed tomography use in orthodontics in the UK.","authors":"Fahad Alawsi, Sarah Meadows, Susan J Cunningham","doi":"10.1177/14653125261444746","DOIUrl":"https://doi.org/10.1177/14653125261444746","url":null,"abstract":"<p><strong>Objective: </strong>To investigate access to, frequency of use, justification, challenges and training regarding cone-beam computed tomography (CBCT) imaging in orthodontics in the UK.</p><p><strong>Design: </strong>Cross-sectional questionnaire study.</p><p><strong>Setting: </strong>Web-based.</p><p><strong>Methods: </strong>An online questionnaire was developed after a review of the literature and discussion with practising orthodontists to identify key themes of importance. It was piloted before use and then distributed via the British Orthodontic Society (BOS). All responses were anonymous.</p><p><strong>Results: </strong>A total of 82 complete responses were received (~7% response rate). Access to CBCT facilities was primarily through NHS secondary care (68%). Usage was mainly for assessment of impacted teeth, and 80% of respondents who use CBCT reported increased CBCT imaging referrals over the past 5 years. Barriers included geographic distance and cost. Almost 60% of respondents had formal CBCT training, but over one-third lacked easy access to dental/maxillofacial radiology reporting.</p><p><strong>Conclusions: </strong>Access to CBCT for orthodontic patients in the UK was mainly through NHS secondary care. Most respondents reported using CBCT for fewer than 10% of patients, most commonly for assessment of unerupted or impacted teeth. The majority of those who used CBCT reported an increase in CBCT referrals over the past 5 years. Reported challenges included cost, travelling distance to CBCT facilities, and limited access to dental and maxillofacial radiology reporting. Although most respondents had undertaken formal CBCT training, over one-third reported difficulty accessing specialist radiology support.</p>","PeriodicalId":16677,"journal":{"name":"Journal of Orthodontics","volume":" ","pages":"14653125261444746"},"PeriodicalIF":1.5,"publicationDate":"2026-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147774548","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":"The optimal site for orthodontic mini-screw placement in the mandibular symphysis: A cone-beam computed tomography study.","authors":"Elsa Arango, Flavio Uribe, Ivonne Barrero, Carlos Villegas, Sonia P Plaza-Ruiz","doi":"10.1177/14653125261433575","DOIUrl":"https://doi.org/10.1177/14653125261433575","url":null,"abstract":"<p><strong>Objective: </strong>To determine the ideal site for mini-screw (MS) insertion in the mandibular symphysis by obtaining total, intraosseous and extraosseous height and depth measurements in this anatomical region in relation to the mandibular anterior teeth and further categorise the results by sex and age.</p><p><strong>Design: </strong>Cross-sectional study.</p><p><strong>Settings: </strong>Cone-beam computed tomography (CBCT) images were analysed from existing clinical records.</p><p><strong>Methods: </strong>CBCT images of 90 patients were examined from a single centre at UniCIEO University. The sample was divided into three age groups: G1 = 30 patients aged 9-13 years; G2 = 30 patients aged 14-23 years; and G3: 30 patients aged 24-50 years. Total, intraosseous and extraosseous height and depth measurements of the mandibular symphysis were obtained at the lower central incisor (LCI), lower lateral incisor (LLI) and lower canine (LC), along the long axis of each respective tooth, by a calibrated operator. For statistical analyses, <i>t</i>-tests and Mann-Whitney U-test, analysis of variance (ANOVA) and Kruskal-Wallis test were used. Two-way ANOVA was applied for variables with significant differences (<i>P</i> <0.05).</p><p><strong>Results: </strong>Sex-related differences were observed, with male patients presenting greater measurements than female patients, including total height at LCI (mean difference = -2.54, 95% confidence interval [CI] = -3.93 to -1.17) and LC (mean difference = -3.12, 95% CI = -4.71 to -1.54), as well as intraosseous height at LCI (mean difference = -3.00, 95% CI = -4.32 to -1.68) and LLI (mean difference = -2.24, 95% CI = -3.39 to -1.08).</p><p><strong>Conclusions: </strong>An age-related increase in mandibular symphysis height and depth was observed. With respect to the ideal MS dimensions and the optimal site for orthodontic skeletal anchorage, MSs with a length of 20-28 mm may be placed vertically and deep in the lower vestibule of the mandibular symphysis, in the region of the lateral incisor and canine.</p>","PeriodicalId":16677,"journal":{"name":"Journal of Orthodontics","volume":" ","pages":"14653125261433575"},"PeriodicalIF":1.5,"publicationDate":"2026-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147774477","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":"Markerless augmented reality-guided mini-screw placement: A clinical case series.","authors":"Hideyuki Suenaga, Ayuko Sakakibara, Ryo Maruoka, Asako Taniguchi, Kazuto Hoshi","doi":"10.1177/14653125261434039","DOIUrl":"https://doi.org/10.1177/14653125261434039","url":null,"abstract":"<p><strong>Introduction: </strong>Placing mini-screws between teeth can risk contacting or damaging dental roots and injuring adjacent nerves, blood vessels or maxillary sinus when local anatomy is not visualised precisely. The latest digital advances in orthodontics have enabled three-dimensional (3D) virtual protocol designing, allowing orthodontists to simulate the orthodontic treatments and collaboratively map out the surgical intervention before procedures. Computed tomography (CT)-based surgical guides are strongly recommended for patients with delicate and complex anatomical conditions.</p><p><strong>Case presentations: </strong>Three patients presented with concerns related to their occlusion and required precise orthodontic mini-screw insertion.Clinical findings and investigations:In all cases, augmented reality (AR)-guided systems were used to assist in the precise positioning of orthodontic mini-screws.</p><p><strong>Interventions and outcomes: </strong>Successful placement of the mini-screw without damage to the tooth root, confirmed by postoperative radiographs.Relevance and impact:The non-invasive AR-guided system can efficiently highlight the precise position of the tooth root. Hence, AR-assisted mini-screw positioning might potentially aid in avoiding root damage and reducing mini-screw failure rates. This technology offers significant benefits over traditional methods, including adaptability, real-time adjustments and cost efficiency, making it a promising tool for clinicians who place mini-screws.</p>","PeriodicalId":16677,"journal":{"name":"Journal of Orthodontics","volume":" ","pages":"14653125261434039"},"PeriodicalIF":1.5,"publicationDate":"2026-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147638988","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":"The experience and understanding of learning disability and autism of orthodontic practitioners in the United Kingdom: A national survey.","authors":"Jed Yj Lee, Joanne M Collins, Fiona S Ryan","doi":"10.1177/14653125261434036","DOIUrl":"https://doi.org/10.1177/14653125261434036","url":null,"abstract":"<p><strong>Objective: </strong>To explore the experience, knowledge and confidence of orthodontic practitioners in the United Kingdom in managing patients with learning disability or autism.</p><p><strong>Design: </strong>National online survey.</p><p><strong>Setting: </strong>British Orthodontic Society membership.</p><p><strong>Methods: </strong>A novel questionnaire was developed and distributed online to orthodontic practitioners within the British Orthodontic Society. It included questions on the participants' prior training, experience in treating patients with learning disability or autism, knowledge levels using the Learning Disability Knowledge Questionnaire and Autism Knowledge Survey, and self-efficacy in managing these patients.</p><p><strong>Results: </strong>A total of 171 responses were received with participation from various practitioner groups: orthodontic consultants, specialists, postgraduates, therapists and dentists with special interest. The median score for the Learning Disability Knowledge Questionnaire was 73% (interquartile range [IQR] = 20). The median score for the Autism Knowledge Survey was 93% (IQR = 6.7). The percentage of respondents who reported feeling confident in patient management varied across the self-efficacy domains: (1) treating patients with learning disability (51%) and autism (64%); (2) making reasonable adjustments for patients with learning disability (54%) and autism (61%); (3) recognising the signs of learning disability (38%) and autism (48%); and (4) signposting patients with learning disability (27%) and autism (30%) to the relevant local care pathways or services. The participants employed a range of techniques and resources when managing these patients. These included tailoring communication to individuals, adapting to sensory needs, involving parents/carers in treatment planning, adjusting the pace of care, and building trust through behavioural and acclimatisation strategies.</p><p><strong>Conclusion: </strong>Having a good knowledge of learning disability or autism does not always translate to greater confidence in patient management. Improving access to orthodontic-specific learning disability and autism training, national guidance and communication aids could enhance the confidence of orthodontic practitioners in managing these patient groups.</p>","PeriodicalId":16677,"journal":{"name":"Journal of Orthodontics","volume":" ","pages":"14653125261434036"},"PeriodicalIF":1.5,"publicationDate":"2026-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147628041","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":"Cone-beam CT-guided root uprighting of a severely angulated impacted maxillary canine using a boot loop and micro-screw: A case report.","authors":"Rongrong Xiao, Ruoxin Du, Xuechun Zhou, Xiaoyu Qin, Junqiu Wang, Yan Li, Mingfeng Wang","doi":"10.1177/14653125261433577","DOIUrl":"https://doi.org/10.1177/14653125261433577","url":null,"abstract":"<p><strong>Introduction: </strong>Orthodontic traction of impacted maxillary canines remains a clinical challenge, particularly when the tooth is severely angulated. Conventional force application to the crown may increase the risk of damage to adjacent roots due to insufficient control of root positioning. This case demonstrates the use of a boot loop in combination with a micro-screw to upright the canine root within the alveolar bone before potential root contact. Treatment alternatives and biomechanics are discussed to illustrate the effectiveness of this approach.Diagnosis and treatment plan:A boy aged 14 years 1 month presented with a severely angulated impacted maxillary left canine, with the root apex located above the maxillary left second premolar. The primary treatment objective was to align the impacted canine while preventing injury to adjacent roots. The treatment plan involved uprighting the canine root using a boot loop and micro-screw designed to apply light, controlled forces through loop activation.</p><p><strong>Results: </strong>During active treatment, the root angulation of the impacted canine was corrected from 60° distal to 13° mesial, achieving a maximum angular change of 73° through controlled uprighting. The canine was then successfully repositioned into its ideal position. No root resorption, gingival recession, or loss of supporting tissue was observed.</p><p><strong>Conclusion: </strong>The combination of a boot loop and micro-screw offers effective three-dimensional control of crown and root movement, providing a reliable and effective solution for managing severely angulated impacted canines.</p>","PeriodicalId":16677,"journal":{"name":"Journal of Orthodontics","volume":" ","pages":"14653125261433577"},"PeriodicalIF":1.5,"publicationDate":"2026-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147628026","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":"A novel aesthetic technique for alignment of an impacted anterior tooth: A case report.","authors":"Molly Ailsa McCleary, Saskia Andrea Schwabe, David Waring","doi":"10.1177/14653125261433571","DOIUrl":"https://doi.org/10.1177/14653125261433571","url":null,"abstract":"<p><strong>Introduction: </strong>Impacted anterior teeth are common, with sequalae including root resorption of adjacent or nearby teeth. Management depends on patient- and tooth-specific factors; however, in cases of severe resorption, elective tooth loss may be favoured. This case discusses an aesthetic solution to disimpaction of an anterior tooth, involving multidisciplinary input.</p><p><strong>Patient concerns: </strong>A girl aged 13 years 10 months presented to an orthodontic department, complaining of missing teeth and poor dental aesthetics.</p><p><strong>Clinical findings: </strong>Class II division 1 incisor relationship on a Class I skeletal base, complicated by unerupted maxillary canines (UR3, UL3), retained URC and potential for severe crowding in the upper arch. Radiographic assessment confirmed impacted maxillary canines and an unerupted supernumerary tooth lying palatal to UR1. The impacted UR3 had caused significant root resorption to the UR1.</p><p><strong>Interventions: </strong>After a multidisciplinary discussion, the impacted UR3 was exposed and aligned into the UR1 position, with elective loss of the resorbed UR1. A novel pontic design, incorporating a traction spring, was used, enabling maintenance of a pontic in-situ while simultaneously allowing for orthodontic traction of the UR3. Restorative input after debond disguised the UR3 as the UR1.</p><p><strong>Outcomes: </strong>UR3 was successfully disimpacted and aligned into the UR1 position with the use of a novel pontic design.</p><p><strong>Conclusion: </strong>This case delivers a novel solution to a complex aesthetic dilemma in the anterior dentition that can be modified, and adapted, to suit other anterior impactions.</p>","PeriodicalId":16677,"journal":{"name":"Journal of Orthodontics","volume":" ","pages":"14653125261433571"},"PeriodicalIF":1.5,"publicationDate":"2026-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147581581","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":"Salivary insulin-like growth factor-1 (IGF-1) and bone alkaline phosphatase (BALP) levels during mandibular advancement with Twin Block appliance: A longitudinal study.","authors":"Tulika Tripathi, Navneet Singh, Veena Gv, Rinkle Sardana, Bhawna Mahajan, Priyank Rai","doi":"10.1177/14653125261427467","DOIUrl":"https://doi.org/10.1177/14653125261427467","url":null,"abstract":"<p><strong>Objective: </strong>To assess salivary insulin-like growth factor-1 (IGF-1) and bone alkaline phosphatase (BALP) levels during mandibular advancement with Twin Block appliance.</p><p><strong>Methods: </strong>The study enrolled 49 participants with skeletal Class 2 malocclusion, a retrognathic mandible, positive visual treatment objective (VTO), horizontal to average growth pattern and cervical vertebrae maturation index stages 3-4 (CVMI). Participants were treated with Twin Block appliance (Twin Block group [TBG]; n = 39). Salivary samples were collected before treatment (T0), at 7-10 days (T1), 6-10 weeks (T2), 8-10 months (T3) and after treatment (T4). Non-compliant participants formed the non-compliant group (NCG; n = 10). Lateral cephalograms were obtained for cephalometric evaluation. Statistical analyses compared salivary IGF-1 and BALP levels and cephalometric parameters within and between groups.</p><p><strong>Results: </strong>The final sample included 39 participants in the TBG (17 boys, 22 girls; mean age <b>=</b>12.56 ± 1.09 years) and 10 participants in the NCG (5 boys, 5 girls; mean age <b>=</b>12.7 ± 1.16 years). A significant difference was observed in the salivary IGF-1 and BALP levels within the TBG across different time intervals. In the TBG, IGF-1 increased significantly at T1, and BALP significantly increased at T2 and T3. The NCG showed no significant changes in levels of IGF and BALP. A significant positive correlation between IGF-1 and BALP was noted at T1 in the TBG (<i>P</i> <0.05), whereas a significant negative correlation was observed at T2 and T3 (<i>P</i> <0.05). Mann-Whitney test showed a significant increase in mandibular length in TBG compared to NCG. Cephalometric analysis revealed significant improvements in mandibular length in TBG compared to NCG between T0 and T4.</p><p><strong>Conclusions: </strong>The study demonstrated a significant increase in salivary IGF-1 levels within 7-10 days, with BALP levels peaking at 6-10 weeks. These findings suggest a potential role of IGF-1 and BALP in the biochemical response to Twin Block appliance therapy.</p>","PeriodicalId":16677,"journal":{"name":"Journal of Orthodontics","volume":" ","pages":"14653125261427467"},"PeriodicalIF":1.5,"publicationDate":"2026-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147512901","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":"Clear aligner treatment and the generation of posterior open bites: Aetiology, treatment and prevention.","authors":"Adewale Akinwale-Quansah, Parmjit Singh","doi":"10.1177/14653125261426388","DOIUrl":"https://doi.org/10.1177/14653125261426388","url":null,"abstract":"<p><p>A frequent and well-documented issue that is seen with clear aligner treatment (CAT) is the development of posterior open bites. The theories of posterior open bite development are discussed, and the treatment and prevention of each aetiological factor are outlined. Predictable prevention and management of posterior open bites during CAT would serve to improve treatment outcomes and patient satisfaction both aesthetically and functionally.</p>","PeriodicalId":16677,"journal":{"name":"Journal of Orthodontics","volume":" ","pages":"14653125261426388"},"PeriodicalIF":1.5,"publicationDate":"2026-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147504212","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":"Blocks of pontics to replace missing teeth: A clinical pearl.","authors":"Kinda Awad, Maria Dillon, Sue Howard, Jayne Harrison","doi":"10.1177/14653125251391433","DOIUrl":"10.1177/14653125251391433","url":null,"abstract":"<p><p>Patients with hypodontia often undergo orthodontic treatment, with single tooth pontics often used to replace missing teeth. However, single tooth pontics can often rotate on the archwire, leading to compromised stability. 'Blocks of pontics' can provide prosthetic replacement during orthodontic treatment for patients with hypodontia, overcoming common issues with large edentulous spans. After impression taking, blocks of pontics can be waxed up and finished in acrylic. These can then be ligated to the archwire intraorally. Blocks of pontics can be life-changing, restoring adequate aesthetics and function, before multidisciplinary restorative management.</p>","PeriodicalId":16677,"journal":{"name":"Journal of Orthodontics","volume":" ","pages":"84-89"},"PeriodicalIF":1.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146113598","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}