Aichi Gakuin Daigaku Shigakkai shi最新文献

{"title":"[Rheological properties of elastomeric impression materials].","authors":"M Kikuchi","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The rheological properties of elastomeric impression materials are important because they are major determinants in the handling characteristics and adaptation to the soft and hard tissues of the mouth. Of particular interest is the rheology of the elastomeric impression materials as supplied by the manufacture since this strongly influences the ease with which the two pastes can be mixed and placed. Additionally, the flow characteristics of the mixed impression materials are also important as these will have an important bearing on the accuracy and reproduction of surface detail which are influenced by the working time. Generally, rheological properties can be defined as the study of the flow characteristics of viscos materials such as elastomeric impression materials. In the context of impression materials used in dentistry the variation of these flow characteristics over short time intervals is extremely important in the making of clinically acceptable impressions. The purpose of these studies were to measure a variety of rheological characteristic for the unmixed elastomeric impression materials and to relate this information to clinical dental procedures. The elastomeric impression materials used in this study were polysulfides, condensation cured silicone, addition cured silicone rubbers in common clinical use and specimens of adding increasing increments of filler (SiO2, TiO2 or PbO2) to a main constituent part (Thiokol LP2, Chloridparaffin, Silicone or Vinylsilicone) of each impression paste. The viscosity of these materials were measured by using the Ishida-Giken cone and plate high shear rheometer. The changes in shear stress with time were recorded for a shear rate of 5 s-1 at 23 degrees C. The relation of shear rate to shear stress were accomplished with a range of shear rates from 0 s-1 to 20 s-1. The viscosity behavior which were the flow characteristic, apparent viscosity, the yield value and the areas of hysterisis loop, were determined from both the shear stress-time and the shear stress-shear rate curves. The results of this study of elastomer impression material pastes have shown that: 1. All impression pastes exhibited non-Newtonian viscosity characteristic, apparent viscosity decreasing with increasing shear rate. 2. Surflex F base pastes (polysulfide rubber), Flexicone injection type base paste (condensation-cured silicone rubber) and Exaflex injection type base paste (addition cured silicone rubber) were pseudoplastic behavior, and other impression pastes were virtually thixotropic behavior. 3. All impression paste had yield value, especially Surflex F accelerator pastes which had a markedly higher yield value.(ABSTRACT TRUNCATED AT 400 WORDS)</p>","PeriodicalId":75458,"journal":{"name":"Aichi Gakuin Daigaku Shigakkai shi","volume":"28 4","pages":"1287-302"},"PeriodicalIF":0.0,"publicationDate":"1990-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13290493","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 alterations of occlusal sounds, jaw opening movement and electromyography depend on occlusal interference].","authors":"N Suzuki","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Before crown prosthetese are set on the prepared teeth, occlusal adjustments are normally necessary. Previous studies suggested that the tolerance of occlusal interference is less than 30 microns and that the occlusal sensibility of tooth must be smaller than 30 microns. The purpose of this study was to investigate the possibility of measuring small amounts of occlusal interference by using the occlusal examinations of occlusal sounds, jaw movement and muscle activity. Fifteen subjects participated in this study. They had healthy oral tissue and TMJ. The occlusal interferences were made from platinum foil (25 microns/layer). For 200 microns thickness, 100 microns thickness and 50 microns thickness, multiple-thickness (8, 4 and 2 layers) platinum foils were used. For 25 microns thickness, simple platinum foil was used. And for 15 microns thickness, rolled platinum foil was used. Each occlusal interference was applied on 3 or 6 of the subject in order from the thickest to the thinnest one. For the measuring of occlusal sounds, accelerometers were attached to the skin of each orbital point. For the measuring of jaw movement, a mandibular kinegiograph K-5R (Mio.tronics Co.) was used. Surface electrodes were used for the measurement of muscle activities of masseteres and anterior tempolar muscles. The measurements were performed regularly after the subjects were instructed to start tooth tapping at the speed of three times a second. The results were as follows. 1. When any occlusal interference was put on 3 or 6, both the peak to peak value of occlusal sounds were reduced and the duration of the sounds were increased compared to cases with normal dentition. The duration of the jaw tooth tapping movement and the peak to peak value of muscle activity for tooth tapping didn't show any tendency of change when occlusal interferences were used. However, the duration of muscle activity preceding the onset occlusal sound indicated increasing. 2. When the amount of occlusal interference was reduced, the peak to peak value of occlusal sounds was increased and the duration shortened. The increased or decreased time of the jaw tooth tapping movement depended on the amount of occlusal interference. 3. These findings suggest that the peak to peak value and the duration of occlusal sounds, the duration of the jaw tooth tapping movement, and the duration of muscle activity preceding the onset occlusal sound are useful data for objective assessments of occlusal contacts.</p>","PeriodicalId":75458,"journal":{"name":"Aichi Gakuin Daigaku Shigakkai shi","volume":"28 4","pages":"1237-58"},"PeriodicalIF":0.0,"publicationDate":"1990-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13289865","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":"[Morphological study of open bite. Skeletal Class I and Class II open bite].","authors":"S Tanaka","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The purpose of this study was to quantify the morphological features of class I and II openbite. The subjects were 151 female patients, over 7 years old, and as a control group, 180 female cases of normal overbite. The subjects were classified into 6 subgroups by ANB angles and ages as follows: 1. Class I A group (7 y less than or equal to age les than 10 y): openbite (30 cases), control (34 cases) 2. Class I B group (10 y less than or equal to age less than 15 y): openbite (23 cases), control (31 cases) 3. Class I C group (15 y less than or equal to age): openbite (20 cases), control (23 cases) 4. Class II A group (7 y less than or equal to age less than 10 y): openbite (38 cases), control (45 cases) 5. Class II B group (10 y less than or equal to age less than 15 y): openbite (20 cases), control (26 cases) 6. Class II C group (15 y less than or equal to age): openbite (20 cases), control (21 cases) The following results were obtained: 1. The combined features of class I and II openbite groups in all the 6 groups were an especially large anterior facial height and remarkable downward of lower occl. pl. angle. Mand. pl. angle was large, and the lower part of the face was tapered. 2. The primary factors of openbite were not only over-eruption of the upper molars but also vertical excess of the mandible with a large alveolar bone. 3. The clearest differences between classes I and II openbite were the mand. pl. and lower occl. pl. angles. The class I openbite groups had a large gonial angle, depending on the subgroup. On the other hand, the class II openbite groups exhibited backward and downward shifting of the mandible depending on the subgroup. 4. In the lower age groups (7 y less than or equal to age less than 10 y) both class I and class II openbite already had denture and alveolar factors, as well as skeletal problems. In the class II openbite, especially in adult cases there were unusual morphological problems both in antero-posterior and vertical relations. 5. Contrary to most reports, the nasal floor did not show an upward cant. In the adult class II openbite even a downward cant, resulting from the backward and downward shifting of the mandible was observed.</p>","PeriodicalId":75458,"journal":{"name":"Aichi Gakuin Daigaku Shigakkai shi","volume":"28 4","pages":"1129-50"},"PeriodicalIF":0.0,"publicationDate":"1990-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13289858","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":"[Morphological studies on the dental arch and palate of the Chinese in Fukien Province, Taiwan, using Moiré patterns].","authors":"J S Chen","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Using Moiré topography, the forms of the dental arch and palate of males and females were compared. This was carried out in Fukien province, Taiwan. The materials used consisted of plaster casts of the upper dentitions of 65 males and 69 females with normal occlusion, aged from 20 to 22 years. The results are as follows: 1. The standard form of the upper dental arch represented by a pentagon is shown in Table 1 and in Fig. 3. 2. The dental arch of the male was larger than that of the female, the difference being significant for the anterior and posterior widths of the arch. 3. The correlation coefficients were generally lower in the female than in the male. This was especially true with regard to the size of the anterior portion of the female dental arch. In the posterior portion, there was no correlation between the dental arch length and dental arch width of either sex. 4. The distance from the origin (F) to the papilla incisiva was 23.47 mm in the male and 23.67 mm in the female. The number of moiré band in the bottom of the palate at the origin from the basal plane was 12.89 in the male and 12.73 in the female. There were no significant differences in these two measurements between sexes. 5. On the vertical section of the palate, the anterior portion of the palate of the female was deeper than the male. However, in the posterior portion the male was deeper and wider in the palate morphology than the female. The vertical section in the palate of the male was similar in form to that of the female at the midpoint between the anterior and posterior portions, the canine and/or first premolar. 6. The horizontal section of the palate showed that the distance from the origin to the canine and/or to the first premolar were similar in both sexes at any palate depth.</p>","PeriodicalId":75458,"journal":{"name":"Aichi Gakuin Daigaku Shigakkai shi","volume":"28 4","pages":"1181-97"},"PeriodicalIF":0.0,"publicationDate":"1990-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13289862","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":"[Quantitative analysis of the complete image layer in rotational panoramic radiography].","authors":"M Naitoh","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Radiography is a fundamental method of examination in clinical dentistry. Rotational panoramic radiography provides comprehensive information on the maxilla and mandible, and is thus a very valuable procedure for dental practitioners. It is impossible for the image layer to be altered to perfectly suit each individual patient, so the closest corresponding image layer is selected from the several layers in the current panoramic x-ray units. Therefore, it is essential for the two-dimensional characteristics of the layers to be accurately understood when performing radiography and diagnosis. There are a number of subjective and objective methods available to evaluate the image layers, but they all have certain disadvantages. Accordingly, an experimental model was used to quantitatively analyze the complete image layer from the anterior to the TMJ region. At first the central plane of the image layer was obtained by analyzing the x-ray beam. Subsequently, the modulation transfer function (MTF) values of the complete image layer from the anterior to the TMJ region were measured using the slit method with digital Fourier transformation. In order to define the image layer, the information transfer factor (ITF) was calculated by integrating the squared MTF from 0 to 10 cycles/mm at each position. The measured image layer was then compared with the layer calculated by the method of McDavid et al. A Veraview apparatus (J. Morita Corp., Japan) with a 1.1 mm primary slit width was used as the panoramic x-ray unit, and DuPont HiPlus/Kodax X-Omat RP was used as the screen/film combination. The results are summarized below. 1. The central plane of the layer, which was obtained by analyzing the x-ray beam, showed a palabolic curve on the right side and a sigmoid curve on the left side, and the forms of the curves differed between the premolar and the molar regions. 2. The average horizontal angle of the beam to the median line on the right and left sides was analyzed using panoramic radiograms. It was 24.2 degrees for the mandibular canine, 58.4 degrees for the surface between the 1st and 2nd molars, and 95.1 degrees for the condyle. 3. When the limit of the image layer was defined as an ITF of 75, the measured image layer thickness was 5.74 mm in the anterior region, 7.4 mm in the canine region, 15.1 mm in the molar region, and 20.7 mm in the TMJ region. The calculated values were 6.16 mm, 8.9 mm, 15.7 mm, and 20.0 mm, respectively.(ABSTRACT TRUNCATED AT 400 WORDS)</p>","PeriodicalId":75458,"journal":{"name":"Aichi Gakuin Daigaku Shigakkai shi","volume":"28 4","pages":"1199-224"},"PeriodicalIF":0.0,"publicationDate":"1990-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13289863","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":"[Contingent negative variation prior to phonation in cleft palate-operated patients].","authors":"S Kitayama","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>In an attempt to objectively measure psychological tension suffered by cleft palate-operated patients (CPs) with speech difficulty, the contingent negative variation (CNV) was recorded in CPs and normal subjects. The CNV is an expectancy-related brain potential recorded from the surface of the head. It begins to develop after the warning signal and reaches its maximum before the imperative signal, immediately after which a specific voluntary movement is promptly executed. The maximum amplitude of CNVs and the area encircled by each CNV and its base line were measured in the vertex and the left front-parietal region (FP) during tasks of sound production (voice CNV) or finger flexion (finger CNV). Significant differences between CPs and normals were found in the following CNV parameters: 1) The FP/vertex ratio of the amplitude of finger CNVs was smaller in CPs. 2) The amplitude of voice CNVs in the FP was lower in CPs when normals uttered a Japanese vowel \"a\" at a relatively low intensity (60 dB) while CPs uttered \"a\" or the sounds most difficult for them. 3) The ratio of the amplitude of voice CNVs led from the FP to that led simultaneously from the vertex was smaller in CPs during the tasks described in 2. 4) The ratio of the area of voice CNVs in the FP to the amplitude of each CNV was greater in CPs in two cases; firstly in the task where normals uttered \"a\" and CPs produced the sounds most difficult for them, and secondly in the task where the subjects were asked to make the articulation at a high sound level (80 dB).(ABSTRACT TRUNCATED AT 250 WORDS)</p>","PeriodicalId":75458,"journal":{"name":"Aichi Gakuin Daigaku Shigakkai shi","volume":"28 4","pages":"1303-10"},"PeriodicalIF":0.0,"publicationDate":"1990-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13290494","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 physical properties of silicone impression materials with hydrophilicity and hydrophobicity. Wetting, water absorption, surface structure of dental stone and dimensional change on stone dies].","authors":"H Murakami,&nbsp;S Takehana,&nbsp;M Takenaka,&nbsp;T Abe","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>In order to compare the physical properties of the silicone impression materials with regard to their hydrophilicity and hydrophobicity, wetting and water absorption, the surface structure and dimensional changes of stone dies were investigated. The evaluation of wetting was performed on one kind of addition-type material with hydrophilicity, five kinds of addition-type materials with hydrophobicity and one kind of condensation-type silicone impression material. One kind of addition-type silicone impression material with hydrophilicity and hydrophobicity was used in other research. Wetting was assessed by measuring the contact angle between water and the impression materials. Water absorption was assessed by the change in weight of the impression materials after immersion in water. The surface structure of the dental stone was observed by SEM. The dimensional changes of stone dies were measured by means of an apparatus designed in this department. The results were as follows: 1. Wetting: The addition-type impression material with hydrophilicity had a 51.4 +/- 1.3 degree contact angle, and other impression materials varied from 84.6 +/- 6.1 degrees to 97.7 +/- 4.4 degrees. 2. Water absorption: The amount of water absorption of the hydrophilic type was greater than that of the hydrophobic type. 3. The surface structure of dental stone: In the case of Vermix stone, which was poured into water-immersed hydrophilic type material, the stone crystals became large, but Fujirock showed no change. 4. The dimensional change on stone dies: No difference was apparent between the hydrophilic type and the hydrophobicity type. 5. Hydrophilicity may affect the surface structure of the dental stone slightly but this is possible within the permissible clinical limits.</p>","PeriodicalId":75458,"journal":{"name":"Aichi Gakuin Daigaku Shigakkai shi","volume":"28 4","pages":"1105-14"},"PeriodicalIF":0.0,"publicationDate":"1990-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13289330","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":"[Morphological characteristics of the cranio-facial structure of Chinese (Taiwanese) young adults].","authors":"J S Chen,&nbsp;H Nawa,&nbsp;K Yoshida,&nbsp;T Negoro,&nbsp;S Goto,&nbsp;T Iizuka","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>In this study 26 males (average age: 16 y 9 m) and 23 females (average age: 16 y 7 m) were selected from Chungtai Medical Junior College in Taichung, Taiwan. Head films of these students were traced and analysed. Mean values of the Chinese young adults in Taiwan were calculated and the conclusions were as follows: 1) Linear measurements of this present study were compared to Lin's in both males and females. A significant difference was noticed in the skeletal pattern. 2) Angular measurements of this present study were compared to Lin's data of stage IIIC. The gonial angle of this present study was smaller than Lin's data. However, no significant differences were noticed in the positional relationship of upper and lower jaws. 3) Regarding the axes of the anterior teeth, a lingual tipping tendency of the upper anterior teeth and a labial tipping tendency of the lower anterior teeth were observed. 4) The linear measurements in the present study were compared to the Japanese data of stage V. The anterio-posterior dimension of the chinese maxilla was larger than the Japanese. However, there are no significant differences in the position of the upper and lower jaws in females. 5) The measurements of the mandible in this study were smaller than those of the Japanese data. The gonial and mandibular plane angles, especially, were significantly smaller than those of Japanese. 6) The axes of upper and lower anterior teeth of Taiwanese showed more labial tipping than those of Japanese in this study.</p>","PeriodicalId":75458,"journal":{"name":"Aichi Gakuin Daigaku Shigakkai shi","volume":"28 4","pages":"1115-27"},"PeriodicalIF":0.0,"publicationDate":"1990-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13289331","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 study of how to distinguish the side on which TMJ noise is occurring].","authors":"K Hashimoto,&nbsp;S Takehana,&nbsp;Y Ito,&nbsp;M Takenaka,&nbsp;N Suzuki,&nbsp;T Abe","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Many patients with TMJ dysfunction suffer from TMJ noise. The measurement of TMJ noise is an important factor in assessing the state of the TMJ dysfunction. Consequently we measured the TMJ noise using electrical techniques in order to make an accurate record. However, determining the side on which the noise occurs is not always easy in auscultation or when picking up the noise electrically, because the sound is carried across the bony structure and picked up on both sides. To solve this problem, we used a three-directional accelerometer, measuring the sound on both sides in the hope that a difference in measurements would allow us to identify the side of the noise. In this study, we vibrated one side of the TMJ with pulse waves, and we compared the vibrated side to the unvibrated side. The height of the pulses was held at 4 volts. In addition, we changed the rising time from 0 volt to 4 volts within a range of 0.6-2.0 msec. The following results were obtained. 1. The time difference between the peaks of the three directions was from 0.32 msec to 3.22 msec on the vibrated side, and from 2.92 msec to 18.2 msec on the unvibrated side. 2. Whenever the time was increased within the selected range, the time difference between the peaks of the three directions on the vibrated side was shorter than that on the unvibrated side. 3. These results suggest that the use of a three-directional accelerometer is a reliable method of distinguishing on which side the TMJ noise is occurring.</p>","PeriodicalId":75458,"journal":{"name":"Aichi Gakuin Daigaku Shigakkai shi","volume":"28 4","pages":"1151-7"},"PeriodicalIF":0.0,"publicationDate":"1990-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13289859","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":"[Orthodontic treatment of malocclusion with periodontitis].","authors":"N Maruchi,&nbsp;K Miyajima,&nbsp;T Iizuka,&nbsp;K Inagaki,&nbsp;T Noguchi,&nbsp;M Sakai","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Adults with untreated malocclusions suffer from more periodontal disease than if their malocclusion had been corrected orthodontically. What orthodontists can offer in the management of patients with periodontal disease, how they can help the periodontists and the patients, and how the periodontists can help the orthodontist make treatment safe and purposefully are widely discussed. The purpose of this study is, therefore, to discuss how orthodontic patients with severe periodontitis could be treated and what we should do for these patients during the treatment as well as at their initial visit. One case is presented as an example of treatment for malocclusion with sever periodontitis: The patient was a 23 years 8 months female with a chief complaint of protrusion of upper incisors. Since clinical examination revealed severe periodontitis, periodontal treatment was undertaken for one year prior to orthodontic treatment. From these observations, we are conviced of the importance again of the global approach and the team treatment method in treating malocclusions with periodontitis.</p>","PeriodicalId":75458,"journal":{"name":"Aichi Gakuin Daigaku Shigakkai shi","volume":"28 4","pages":"1171-9"},"PeriodicalIF":0.0,"publicationDate":"1990-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13289861","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}