{"title":"Alveolar exostosis – revisited: A narrative review of the literature","authors":"K. Smitha , G.P. Smitha","doi":"10.1016/j.sjdr.2014.02.001","DOIUrl":"10.1016/j.sjdr.2014.02.001","url":null,"abstract":"<div><p>An exostosis is a localized, peripheral overgrowth of bone of unknown etiology of benign nature. It may be a nodular, flat or pedunculated protuberance located on the alveolar surfaces of the jawbones. The etiology of oral bony exostosis is still not clear. Racial, autosomal dominant factors, dental attrition, and even nutritional factors have been suggested as having an influence. In the jaws, depending on the anatomic location they are named as torus palatinus (TP), torus mandibularis (TM), or buccal bone exostoses (BBE). The clinical importance of exostosis lies in surgical removal of these to permit proper flap adaptation, most importantly in the posterior maxilla, and to the potential use of the mandibular and palatal tori as sources of autogenous cortical bone for grafting.</p></div>","PeriodicalId":101249,"journal":{"name":"The Saudi Journal for Dental Research","volume":"6 1","pages":"Pages 67-72"},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.sjdr.2014.02.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86429612","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}
Nabil M. Al-Zubair , Faisal A. Idris , Fahmi M. Al-Selwi
{"title":"The subjective orthodontic treatment need assessed with the aesthetic component of the Index of Orthodontic Treatment Need","authors":"Nabil M. Al-Zubair , Faisal A. Idris , Fahmi M. Al-Selwi","doi":"10.1016/j.sjdr.2014.02.003","DOIUrl":"10.1016/j.sjdr.2014.02.003","url":null,"abstract":"<div><h3>Objective</h3><p>The objective of this research was to evaluate the subjective orthodontic treatment with the aesthetic component (AC) of the Index of Orthodontic Treatment Need among a sample of Yemeni population.</p></div><div><h3>Materials and methods</h3><p>The investigation was carried out in Sana’a city, a total of 368 participants were randomly selected from a list of 1376 university students excluding dentistry students, among them 165 responded (92 females and 73 males) based on a questionnaire. The questionnaire checked items concerning the subjective assessment of dental appearance, demand for orthodontic treatment, and any functional disorders (speech, mastication, muscular pain). For statistical analysis chi-square test was used. A probability at the 5% level or less (<em>P</em> <!--><<!--> <!-->0.05) was considered statistically significant.</p></div><div><h3>Results</h3><p>Overall, 96.4% of the sample classified themselves in the ‘no treatment need’ category, 3% classified themselves in the ‘great treatment need’ category. Satisfaction with dental aesthetics was expressed by 65.5% of respondents. Out of the total sample, 41.8% said that they should have orthodontic treatment, the sex distribution was significantly different (chi-square<!--> <!-->=<!--> <!-->4.279, df<!--> <!-->=<!--> <!-->3, <em>P</em> <!-->=<!--> <!-->0.001).</p></div><div><h3>Conclusion</h3><p>According to the AC of IOTN, almost 3.6% of the evaluated Yemeni subjects had a ‘borderline need’ to a ‘great need’ for orthodontic treatment. If the answers of those who said that they should have orthodontic treatment are considered, the need would increase to two-fifth (41.8%) of the sample.</p></div>","PeriodicalId":101249,"journal":{"name":"The Saudi Journal for Dental Research","volume":"6 1","pages":"Pages 9-14"},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.sjdr.2014.02.003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76157727","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}
Mohammed Sultan Al-ak’hali , Khaled Abdulsalam Al-haddad , Nezar Noor Al-hebshi
{"title":"Oral plasma-cell mucositis exacerbated by qat chewing – A case series","authors":"Mohammed Sultan Al-ak’hali , Khaled Abdulsalam Al-haddad , Nezar Noor Al-hebshi","doi":"10.1016/j.sjdr.2014.05.001","DOIUrl":"10.1016/j.sjdr.2014.05.001","url":null,"abstract":"<div><p>Plasma-cell mucositis (PCM) is a rare idiopathic condition that affects the mucus membrane at one or more of the body orifices. We hereby present eight cases of oral PCM associated with qat chewing. The patients (all males, 20–33<!--> <!-->years old) presented with chronic painful inflammatory mucosal lesions involving different sites of the oral cavity, particularly the gingiva. An erythematous and swollen gingiva with velvety surface was a typical feature. Areas of epithelial sloughing and/or erosions were also noticed. In seven patients, the lesion also affected the tongue, palate, lip and/or buccal mucosa. Hoarseness was observed in some of the patients suggesting laryngeal involvement. The symptoms correlated with patterns of qat chewing. Histological examination revealed dense infiltration of lamina propria by benign plasma cells. Lymphocytosis and/or elevated IgG titer were the main laboratory findings. This provides further evidence that PCM can at least be exacerbated by the habit of qat chewing.</p></div>","PeriodicalId":101249,"journal":{"name":"The Saudi Journal for Dental Research","volume":"6 1","pages":"Pages 60-66"},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.sjdr.2014.05.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88653293","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":"Chromatic stability of light-activated resin and heat-cure acrylic resin submitted to accelerated aging","authors":"Safa’a A. Asal , Maha M. Fahmy , Saeed M. Abdulla","doi":"10.1016/j.sjdr.2014.06.003","DOIUrl":"10.1016/j.sjdr.2014.06.003","url":null,"abstract":"<div><h3>Statement of the problem</h3><p>Several denture base resins providing easier/or faster processing have recently been introduced. Even though these materials have improved physical properties, their color stability is also of vital interest.</p></div><div><h3>Objective</h3><p>The purpose of this study was to determine quantitatively the effect of different colorant solutions on the color stability of Eclipse (visible-light-activated resin) in comparison to Lucitone-199 (heat-cure acrylic resin).</p></div><div><h3>Materials and methods</h3><p>Twenty one specimens from two tested materials, Eclipse (visible-light-activated resin) and Lucitone-199 (heat-cure acrylic resin) were prepared and stored for 24<!--> <!-->h at 37<!--> <!-->°C in distilled water. In a dimmed atmosphere, seven specimens of each tested material were stored in different colorant solutions (strawberry, coffee, and tea). Using a computer-controlled spectrophotometer, color measurements among the specimens were done before and after 252, 504, and 1008<!--> <!-->h of immersion in the colorant solutions. Data were statistically analyzed.</p></div><div><h3>Results</h3><p>Ranova test showed significant differences (<em>p</em> <!--><<!--> <!-->0.05) between the color change mean values for Eclipse and Lucitone-199 at 252, 504, and 1008<!--> <!-->h of accelerated aging. While paired <em>t</em>-test showed no significant difference of means in the color changes between the measuring intervals of each colorant solution with Eclipse. Lucitone-199 showed significant differences especially with coffee and tea colorant solutions.</p></div><div><h3>Conclusions</h3><p>Eclipse denture base material is significantly more color stable than the Lucitone-199. Tea has the highest discoloration effect on Eclipse, but within the acceptable clinical levels. On the other hand, coffee has more discoloration effect on Lucitone-199, while, the least staining effect was caused by strawberry colorant solution on both Eclipse and Lucitone-199.</p></div>","PeriodicalId":101249,"journal":{"name":"The Saudi Journal for Dental Research","volume":"6 1","pages":"Pages 41-47"},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.sjdr.2014.06.003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82708780","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}
Ibrahim Aljulayfi , Ahmed Alrusayni , Saeed Alqahtani , Magdy K. Hamam
{"title":"Awareness of dental interns in managing cases of pregnant women in Saudi Arabia","authors":"Ibrahim Aljulayfi , Ahmed Alrusayni , Saeed Alqahtani , Magdy K. Hamam","doi":"10.1016/j.sjdr.2014.07.002","DOIUrl":"10.1016/j.sjdr.2014.07.002","url":null,"abstract":"<div><p>Pregnant patients are seen commonly in dental offices. However, the possible side effects of dental care on these patients can be misunderstood by both patients and dentists concerned. Therefore, it is important for dental interns, who work in almost every dental office, to know about dental management of pregnant women.</p><p>A survey which consisted of 18 items, was conducted between December 2011 and March 2012 in different dental colleges in Saudi Arabia. The aim of the present study was to objectify dental interns’ knowledge of dental management of pregnant women.</p><p>152 dental interns responded to the survey (63.3% of the total). About 27% of dental interns in the study had never seen pregnant women in their clinic. The majority of dental interns see gingival inflammation as the most oral manifestation in pregnant women (92.1%), and Amoxicillin being the most common antibiotic prescribed for pregnant women (96.1%), when (96.1%) of the dental interns are prescribing it. Regarding their dental school subjects which include managing pregnant women, 29.6% of the dental interns described it as adequate, while 48% said it was little helpful, and 22.4% agreed that it was insufficient. However only 20.4% look for more additional sources of information, while 14.5% said they rarely do. This finding underscores the need to improve the knowledge and information of fundamentals of dental management of pregnant women. Improvement is needed to increase the awareness of dental interns in Saudi Arabia toward this kind of critical treatment.</p></div>","PeriodicalId":101249,"journal":{"name":"The Saudi Journal for Dental Research","volume":"6 1","pages":"Pages 26-29"},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.sjdr.2014.07.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74284607","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":"Marginal integrity of provisional resin restoration materials: A review of the literature","authors":"Vahid Rakhshan","doi":"10.1016/j.sjdr.2014.03.002","DOIUrl":"10.1016/j.sjdr.2014.03.002","url":null,"abstract":"<div><p>Marginal adaptation of provisional restorations is a critical property of these treatments. It is a function of the chemical composition, setting method, and aging procedures. Interim materials include polymethyl methacrylate (PMMA), polyvinyl ethyl methacrylate (PVEMA), Bis-phenol A glycidyl methacrylate (Bis-GMA) composites, and urethane dimethacrylate (UDMA) composites. This review summarizes and compares their marginal fit in the light of the potential disrupting factors and the underlying mechanisms. All these materials fail in moderate- or long-term durations under oral stresses and water sorption, and should be rapidly replaced by permanent restorations before damaging teeth and adjacent tissues.</p></div>","PeriodicalId":101249,"journal":{"name":"The Saudi Journal for Dental Research","volume":"6 1","pages":"Pages 33-40"},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.sjdr.2014.03.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86106415","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}
Rajeev Arunachalam , Arunima P. Reshma , Vini Rajeev , Sarath B. Kurra , Mohan Raj J. Prince , Nita Syam
{"title":"Salivary 8-Hydroxydeoxyguanosine – a valuable indicator for oxidative DNA damage in periodontal disease","authors":"Rajeev Arunachalam , Arunima P. Reshma , Vini Rajeev , Sarath B. Kurra , Mohan Raj J. Prince , Nita Syam","doi":"10.1016/j.sjdr.2014.04.002","DOIUrl":"10.1016/j.sjdr.2014.04.002","url":null,"abstract":"<div><h3>Background</h3><p>8-Hydroxydeoxyguanosine [8-OHdG] is the most common stable product of oxidative DNA damage caused from reactive oxygen species and has been reported to increase its levels in body fluids and tissues during inflammatory conditions.</p></div><div><h3>Materials and methods</h3><p>This case control study evaluates the salivary levels of 8-Hydroxydeoxyguanosine [8-OHdG] in thirty individuals with clinically healthy periodontium and thirty chronic periodontitis patients. Salivary 8-OHdG levels were evaluated at baseline and one month following initial periodontal therapy. 8-OHdG levels in saliva were investigated by using an enzyme linked immunosorbent assay [ELISA].</p></div><div><h3>Results</h3><p>A significant decrease of 8-OHdG levels after initial periodontal therapy were determined in chronic periodontitis group. The mean 8-OHdG level in the saliva of the CP group was significantly higher than H and CG groups (<em>p</em> <!--><<!--> <!-->0.001). Statistically significant correlation was only observed between the salivary levels of 8-OHdG and gingival index (<em>p</em> <!--><<!--> <!-->0.05) in CP group.</p></div><div><h3>Conclusion</h3><p>A higher salivary 8-OHdG level seems to depict an increased oxidative stress during periodontal disease. Our study indicated that 8-OHdG levels in saliva appear to reflect status of periodontal health.</p></div>","PeriodicalId":101249,"journal":{"name":"The Saudi Journal for Dental Research","volume":"6 1","pages":"Pages 15-20"},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.sjdr.2014.04.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83197386","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":"Evaluation of bracket failure rate in orthodontic patients bonded with and without primer","authors":"Ambesh Kumar Rai","doi":"10.1016/j.sjdr.2014.08.001","DOIUrl":"10.1016/j.sjdr.2014.08.001","url":null,"abstract":"<div><h3>Introduction</h3><p>Primers are considered widely essential for bonding orthodontic brackets. However, their role in minimizing bracket failure rates has been frequently questioned.</p></div><div><h3>Objective</h3><p>To investigate the difference in the bracket failure rate in direct bonding with and without the use of orthodontic primer.</p></div><div><h3>Setting and design</h3><p>A prospective, single blinded clinical study at a private clinical practice in Ras Al Khaimah, United Arab Emirates.</p></div><div><h3>Methods and material</h3><p>38 class I bimaxillary protrusion patients requiring all first premolar extraction treatment were assigned to primer and non primer group (19/group) and bonded in a standardized manner. They were followed up from strap up till the end of treatment and bracket failure rate during the entire treatment was recorded, assessed and compared.</p></div><div><h3>Statistical analysis</h3><p>Statistical significance between the two groups was checked using Fischer’s exact test (<em>P</em> less than .05 was considered significant).</p></div><div><h3>Result</h3><p>Debonding in non primer group was more than in primer group but not statistically or clinically significant.</p></div><div><h3>Conclusion</h3><p>The bonding of brackets without using orthodontic primer is possible; however, further research is advocated.</p></div>","PeriodicalId":101249,"journal":{"name":"The Saudi Journal for Dental Research","volume":"6 1","pages":"Pages 48-53"},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.sjdr.2014.08.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81914547","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":"A cross sectional study of gender differences in dental anxiety prevailing in the students of a Pakistani dental college","authors":"Imran Farooq , Saqib Ali","doi":"10.1016/j.sjdr.2014.06.002","DOIUrl":"10.1016/j.sjdr.2014.06.002","url":null,"abstract":"<div><h3>Objective</h3><p>The purpose of this cross sectional study was to assess the level of dental anxiety prevailing in the dental students and to compare the anxiety levels reported by female and male dental students of Sardar Begum Dental College, Peshawar, Pakistan.</p></div><div><h3>Methods</h3><p>Corah’s dental anxiety scale (DAS) questionnaires (in English language) were distributed among the entire dental students present at the day of study (194 students, females: 120, males: 74). DAS had four questions assessing the level of anxiousness with a maximum possible achievable score of 20. Five options were available for each question. Scoring was performed as <em>A</em> <!-->=<!--> <!-->1, <em>B</em> <!-->=<!--> <!-->2, <em>C</em> <!-->=<!--> <!-->3, <em>D</em> <!-->=<!--> <!-->4 and <em>E</em> <!-->=<!--> <!-->5. A score between 4 and 8 showed no anxiety, 9 and 12: moderate anxiety, 13 and 14: high anxiety and between 15 and 20 showed severe anxiety (phobia). Data were analyzed statistically.</p></div><div><h3>Results</h3><p>Overall response rate was 86% (<em>n</em> <!-->=<!--> <!-->167, females: 108, males: 59). Female dental students presented with higher DAS than male students and the difference was also statistically significant (<em>P</em> <!--><<!--> <!-->0.05). Pre-clinical students (1st–2nd year) were found to be more anxious than clinical students (3rd–4th year).</p></div><div><h3>Conclusions</h3><p>Female dental students and pre-clinical students were found more anxious as compared to male dental students and clinical students respectively. Counseling sessions and exposure therapy (exposure of clinical procedures in this case) at an early stage of dental training could be helpful in reducing the anxiety levels.</p></div>","PeriodicalId":101249,"journal":{"name":"The Saudi Journal for Dental Research","volume":"6 1","pages":"Pages 21-25"},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.sjdr.2014.06.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77948117","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}
Huda M. Al-Kuwari, Hana O. Al Balbeesi, Sara Al Thobiani, Manal bin Sogaian
{"title":"Caries incidence in lower anterior teeth bonded with fixed orthodontic retainer","authors":"Huda M. Al-Kuwari, Hana O. Al Balbeesi, Sara Al Thobiani, Manal bin Sogaian","doi":"10.1016/j.sjdr.2014.03.001","DOIUrl":"10.1016/j.sjdr.2014.03.001","url":null,"abstract":"<div><h3>Purpose of the study</h3><p>To evaluate the incidence of carious lesions along the lower fixed retainer wire placed after orthodontic treatment both clinically and radiographically.</p></div><div><h3>Methodology</h3><p>Seventy participants contributed in this study. The experimental group consisted of forty participants (20 males and 20 females with a mean age of 23.4<!--> <!-->years and 24.4<!--> <!-->years, respectively) bonded with lower fixed retainer for a period ranging from one to six<!--> <!-->years. The retainers were immediately placed after orthodontic treatment from right canine to left canine, while the control group consisted of 30 participants (15 males with a mean age of 24.6<!--> <!-->years, and 15 females’ mean age were 26.8<!--> <!-->years). All participants’ lower anterior teeth from 3 to 3 were examined separately clinically and radiographically. Examiners filled a questionnaire concerning patient’s oral hygiene, dietary habits, as well as, frequency of fixed retainer detachment in the experimental group.</p></div><div><h3>Results</h3><p>Out of the 240 bonded teeth that had been examined clinically and radiographically, only 17 teeth had shown carious lesions. Results in both experimental and control group showed insignificant caries incidence (<em>P</em> <!-->><!--> <!-->0.05). When both genders were compared, males had three times higher caries incidence than females in the experimental group with insignificant difference between both (<em>P</em> <!-->><!--> <!-->0.05). Central and lateral incisors in the experimental group had higher caries frequency (37.5%) than canines (25%), 20% of the experimental group experienced retainer detachment. Oral hygiene status evaluation showed significant difference (<em>P</em> <!--><<!--> <!-->0.05) between the experimental and control groups, the percentage of good oral hygiene for both was 61.8% and 20.0%, respectively. Moreover, there was slight significant difference among both regarding the frequency of scaling and prophylactic measures.</p></div><div><h3>Conclusions</h3><p>Our data showed low caries risk and no apparent damage to the teeth bonded with fixed retainer. Oral hygiene evaluation showed that the experimental group had better oral hygiene than the control indicating that good oral hygiene can be maintained regardless of the presence of fixed retainer.</p></div>","PeriodicalId":101249,"journal":{"name":"The Saudi Journal for Dental Research","volume":"6 1","pages":"Pages 3-8"},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.sjdr.2014.03.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76241871","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}