Prosthodontic Research & Practice最新文献_第7页

A Questionnaire Study of Japanese Dentists’ Perceptions of Risks for Overeruption of Molars without Antagonists and Attitude on Prosthetic Intervention 日本牙医对无拮抗剂磨牙过萌风险认知及对义肢干预态度的问卷调查研究

Prosthodontic Research & Practice Pub Date : 2007-10-01 DOI: 10.2186/PRP.6.246

Nobunari Fujimaki, K. Fueki, Y. Igarashi

{"title":"A Questionnaire Study of Japanese Dentists’ Perceptions of Risks for Overeruption of Molars without Antagonists and Attitude on Prosthetic Intervention","authors":"Nobunari Fujimaki, K. Fueki, Y. Igarashi","doi":"10.2186/PRP.6.246","DOIUrl":"https://doi.org/10.2186/PRP.6.246","url":null,"abstract":"Purpose: The aim of this questionnaire study was to survey Japanese dentists’ perceptions of risks for overeruption of unopposed molars and dentists’ attitudes to prosthetic intervention.Methods: A clinical situation with a 42-year-old male patient who just had lost the left mandibular molars was presented. A series of questions was provided regarding what would most probably occur with the unopposed maxillary molars within a 10-year period, what treatment to propose, and indications for the proposed treatment. The questionnaire was sent to the council members of the Japanese prosthodontic society, doctors of Matsumoto Dental University, members of the Nagano and Niigata prefecture dental societies via letter, facsimile or E-mail.Results: 887 of 1320 (67%) dentists returned completed questionnaires. The great majority believed that overeruption of the unopposed molars would occur within a 10-year period (94%). 87% of respondents wanted to perform prosthetic treatment. In contrast, a “wait-and-see” alternative was chosen by only 12%. The most commonly suggested indications for the treatments were the risk for overeruption (96%) followed by impaired masticatory function (77%) and development of TMD (73%).Conclusion: To date, the majority of Japanese dentists seem to believe that overeruption of molars would occur after extraction of antagonists, and that prosthetic interventions are necessary to prevent possible clinical problems.","PeriodicalId":306414,"journal":{"name":"Prosthodontic Research & Practice","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127808896","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}

引用次数: 4

Effect of High-Molecular-Weight Sodium Alginate on the Viscosity and Characteristics of Alginate Impression Materials 高分子量海藻酸钠对海藻酸盐印模材料粘度及特性的影响

Prosthodontic Research & Practice Pub Date : 2007-10-01 DOI: 10.2186/PRP.6.239

N. Aoyama, I. Hayakawa, N. Akiba, S. Minakuchi

{"title":"Effect of High-Molecular-Weight Sodium Alginate on the Viscosity and Characteristics of Alginate Impression Materials","authors":"N. Aoyama, I. Hayakawa, N. Akiba, S. Minakuchi","doi":"10.2186/PRP.6.239","DOIUrl":"https://doi.org/10.2186/PRP.6.239","url":null,"abstract":"Purpose: In this study, we investigated the effects of addition of high-molecular-weight sodium alginate to alginate impression materials with the aim of developing a new high-viscosity impression material.Methods: Four experimental alginate impression materials were prepared based on a conventional material (control material) by varying the percentage of addition of high-molecular-weight sodium alginate in the range of 50% to 100%. The viscosity after mixing, setting time, recovery from deformation, strain in compression, compressive strength, and compatibility with dental stones was determined in accordance with the ISO 1563 and ANSI/ADA Specification no. 18. Results were analyzed using ANOVA and linear regression.Results: All the experimental materials exhibited significantly higher viscosity than the control material (P<0.05). A significant and positive relationship was observed between the addition rate and the viscosity (P<0.05). In the specification tests, all the experimental materials were found to be within specification limits, and not significantly different from the corresponding values of the control material.Conclusion: The addition of high-molecular-weight sodium alginate to an alginate impression material can be effective for increasing the viscosity of the material without deterioration of the properties of the material.","PeriodicalId":306414,"journal":{"name":"Prosthodontic Research & Practice","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129807456","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}

引用次数: 7

Effects of Water Pressure during Polymerization on Mechanical Properties of Autopolymerized Resins 聚合过程中水压对自聚合树脂力学性能的影响

Prosthodontic Research & Practice Pub Date : 2007-10-01 DOI: 10.2186/PRP.6.232

Y. Toyoda, M. Oizumi, Tetsuya Suzuki, Hidekazu Takahashi, N. Oda, Takuya Ohkubo, J. Furuya

{"title":"Effects of Water Pressure during Polymerization on Mechanical Properties of Autopolymerized Resins","authors":"Y. Toyoda, M. Oizumi, Tetsuya Suzuki, Hidekazu Takahashi, N. Oda, Takuya Ohkubo, J. Furuya","doi":"10.2186/PRP.6.232","DOIUrl":"https://doi.org/10.2186/PRP.6.232","url":null,"abstract":"Purpose: This study evaluated the effects of water pressure on the mechanical properties and tensile bond strength of autopolymerized resins during polymerization at room temperature using a dental pressure pot with chair-side ease of handling.Methods: Four different autopolymerized resins (Unifast II, Unifast III, Provinice, and Miky Plus) were used. Specimens were fabricated by the brush-on technique. In the pressure group, specimens were polymerized in a dental pressure pot under 0.2 MPa water pressure at room temperature. In the non-pressure group, specimens were polymerized on bench. The 2 groups were compared for dimensional accuracy, 3-point bending, and tensile bond strength. Data were statistically analyzed by two-way analysis of variance (ANOVA) with Tukey’s multiple comparison test at a significance level of α=0.05.Results: Two-way ANOVA indicated that both resin and pressure had significant effects on the polymerization shrinkage rate (PSR). Interaction between resin and pressure was also significant. The PSR was lower in the pressure group than in the non-pressure group. The PSRs of Unifast II and Miky Plus were greatly improved by pressure polymerization. Significant differences in flexural strength were observed between the 2 groups. The flexural strength significantly increased under pressure. No significant differences in tensile bond strength were observed between the 2 groups.Conclusion: The dimensional accuracy and flexural strength of autopolymerized resins were significantly improved by the application of water pressure during polymerization. No significant changes in tensile bond strength were observed following pressure application at room temperature.","PeriodicalId":306414,"journal":{"name":"Prosthodontic Research & Practice","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122548413","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}

引用次数: 2

Enhancement of a Caries-resistant Oral Environment on Treatment Using Prosthesis 利用假体治疗增强抗龋口腔环境

Prosthodontic Research & Practice Pub Date : 2007-10-01 DOI: 10.2186/PRP.6.276

Junko Tanaka, Masahiro Tanaka, M. Tatsuta, Naoya Uemura, Hyeon-mook Kim, T. Kawazoe

{"title":"Enhancement of a Caries-resistant Oral Environment on Treatment Using Prosthesis","authors":"Junko Tanaka, Masahiro Tanaka, M. Tatsuta, Naoya Uemura, Hyeon-mook Kim, T. Kawazoe","doi":"10.2186/PRP.6.276","DOIUrl":"https://doi.org/10.2186/PRP.6.276","url":null,"abstract":"Patients: A 55-year-old woman with complaints of esthetic disturbance and masticatory dysfunction visited Osaka Dental University Hospital. The remaining upper teeth showed severe degradation of the coronal dentine because of caries. Additionally, the vertical stop in the molar region was lost. In the initial treatment, an overdenture was placed for urgent improvement of the chief complaint. We diagnosed the patient as having esthetic disturbance and masticatory dysfunction due to many decayed and missing teeth. Subsequently, we performed oral surgical, endodontic, and periodontal treatments of the remaining teeth based on the diagnosis. According to the patient’s request, fixed prostheses, i.e., crowns and fixed partial dentures, were selected as the final prostheses. On the other hand, since caries progression is possible during a long-lasting treatment, the patient’s oral environment has been monitored using a saliva test to estimate caries activity. We selected the following 4 factors as the oral environmental factors: the stimulated salivary flow rate, buffering capacity, and salivary microbial counts of mutans streptococci and lactobacilli. The first examination revealed a high-risk oral environment. However, lactobacilli counts decreased immediately after the cementing of fixed prostheses and were low-risk at recall. Other factors remained at low-risk-levels throughout the treatment period.Discussion: To improve esthetic disturbance and masticatory dysfunction, prosthetic treatment was performed, and the progressive degradation of tooth structures due to caries was prevented. The oral environment was examined by the saliva test during therapy. After the treatment, the lactobacilli counts decreased. This is thought to be the result of removing caries and poorly fitting restorations.Conclusion: By means of the saliva test, we confirmed the improvement in the oral environment following proper prosthetic treatment.","PeriodicalId":306414,"journal":{"name":"Prosthodontic Research & Practice","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134380806","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}

引用次数: 0

Comparisons of Masticatory Movements between Mixing Ability Test and Masticatory Performance Test 混合能力测试与咀嚼性能测试咀嚼动作的比较

Prosthodontic Research & Practice Pub Date : 2007-10-01 DOI: 10.2186/PRP.6.253

K. Fueki, E. Yoshida, Y. Igarashi

{"title":"Comparisons of Masticatory Movements between Mixing Ability Test and Masticatory Performance Test","authors":"K. Fueki, E. Yoshida, Y. Igarashi","doi":"10.2186/PRP.6.253","DOIUrl":"https://doi.org/10.2186/PRP.6.253","url":null,"abstract":"Purpose: The purpose of this study was to compare mandibular movements in the mixing ability test with those in the masticatory performance test.Methods: Twenty-six dentate subjects (mean age 25.3 years) performed a mixing ability test using a two-colored paraffin wax cube and a masticatory performance test using 3 g peanuts. Mandibular movements during the chewing of each test item were recorded using an opto-electronic system. Twelve parameters of mandibular movements on a mandibular incisal point were measured for each masticatory cycle. The mean from 2nd to 5th cycle in each parameter was employed for paired t-test.Results: 7 of 12 parameters showed significant mean differences between the mixing ability test and the masticatory performance test. Vertical amplitude, anteroposterior amplitude, maximum closing velocity and opening angle for the mixing ability test were significantly greater than for the masticatory performance test (P<0.05). Opening duration and cycle duration for the mixing ability test were significantly longer than for the masticatory performance test (P<0.05). Envelope angle for the mixing ability test was significantly less than for the masticatory performance test (P<0.001).Conclusion: The results of this study suggest mandibular movements in the mixing ability test are partially different from those in masticatory performance test.","PeriodicalId":306414,"journal":{"name":"Prosthodontic Research & Practice","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121164433","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}

引用次数: 3

Evaluation of Clinical Training for Removable Partial Denture at the Tokyo Medical and Dental University 东京医科和牙科大学可摘局部义齿临床训练的评价

Prosthodontic Research & Practice Pub Date : 2007-10-01 DOI: 10.2186/PRP.6.259

T. Ueno, A. Nishiyama, Masayuki Sato, Nobuhiko Okano, I. Minami, Teruyasu Nakamura, Y. Igarashi

{"title":"Evaluation of Clinical Training for Removable Partial Denture at the Tokyo Medical and Dental University","authors":"T. Ueno, A. Nishiyama, Masayuki Sato, Nobuhiko Okano, I. Minami, Teruyasu Nakamura, Y. Igarashi","doi":"10.2186/PRP.6.259","DOIUrl":"https://doi.org/10.2186/PRP.6.259","url":null,"abstract":"Purpose: The aim of this study was to survey the undergraduate removable partial denture (RPD) clinical program and RPD’s fabricated by students in 2006, and to identify the problems to be solved in the future. Methods: Sixty-nine students in their final semester at Tokyo Medical and Dental University (TMDU) recorded the following preoperative data: age, gender, chief complaint, and Kennedy and Eichner classifica tions. The students were requested to present their treated cases and were subjected to an oral examination by the professor to determine the treatment plan and prosthetic design of denture. Additionally, the students surveyed the chewing function score and visual analogue scale (VAS) regarding esthetics and stability of RPD, and the material used for RPD frameworks was summarized. Results: The patients included 35 men and 34 women, and their chief complaints were mostly dissatisfaction with their current dentures. More than 80% of cases were classified as Kennedy I or II, and about one-fourth were classified as Eichner B4 or C1, in which the occlusal supports could not easily be reconstructed. Chewing function score significantly improved compared to preoperative state (P<0.05) and postoperative VAS was clinically acceptable. 89% of frameworks, were cast with Co-Cr alloy in one piece and a palatal strap or bar and a lingual bar were applied in 77% of treated RPDs. Conclusion: It is thought that our educational methods for delivery of RPDs are adequate. Since it is suggested by an objective assessment of them that they are unsatisfactory, we should deal with that problem without delay.","PeriodicalId":306414,"journal":{"name":"Prosthodontic Research & Practice","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124982622","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}

引用次数: 3

A Preliminary Evaluation of Electromyographic Activities of Masseter Muscles during Speech in Myalgia Patients 肌痛患者言语时咬肌肌电图活动的初步评价

Prosthodontic Research & Practice Pub Date : 2007-07-01 DOI: 10.2186/PRP.6.148

E. Suzuki, S. Ishigaki, H. Yatani, E. Morishige, Seiji Omatsu

{"title":"A Preliminary Evaluation of Electromyographic Activities of Masseter Muscles during Speech in Myalgia Patients","authors":"E. Suzuki, S. Ishigaki, H. Yatani, E. Morishige, Seiji Omatsu","doi":"10.2186/PRP.6.148","DOIUrl":"https://doi.org/10.2186/PRP.6.148","url":null,"abstract":"Purpose: To evaluate the electromyographic activities (EMG) of masseter muscles during speech as a method for evaluating muscle fatigue in myalgia patients.Methods: The control group consisted of 6 subjects (3 males and 3 females, mean age 25.8 yrs), and the patient group consisted of 6 myalgia patients (6 females, mean age 29.5 yrs). The bilateral EMG of the masseter muscles were recorded using bipolar surface electrodes and a computer-based EMG analyzer (UAS-108, UNIQUE MEDICAL Co. Ltd.) during the following sessions: rest (30 seconds) / speech / rest (30 seconds) / maximum voluntary contraction (MVC, 5 seconds). Integrated electromyograms (IEMGs) and mean power frequency (MPF) were subjected to statistical comparisons between the two groups with t-test and Pearson’s product moment correlation coefficient.Results: No significant difference was found in the IEMG during speech between the two groups, while the myalgia patient group showed significantly lower IEMG than the control group during maximum voluntary contraction (MVC) (P=.004). MPF during speech was significantly higher in myalgia patients (P=.040). The same tendency was observed in MPF during MVC, although the difference was not significant. In the control group, strong correlations were found between MPFs during MVC and speech (r=.929, P=.007), and between IEMGs during MVC and speech (r=.822, P=.045). In myalgia patients, no such correlations were observed.Conclusion: The results from this study may suggest the possibility that MPF during speech can be a method for evaluating masticatory muscle fatigue.","PeriodicalId":306414,"journal":{"name":"Prosthodontic Research & Practice","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128469355","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}

引用次数: 0

A Procera® Custom Abutment Fabricated by Scanning the Provisional Abutment 扫描临时基台制作的Procera®定制基台

Prosthodontic Research & Practice Pub Date : 2007-07-01 DOI: 10.2186/PRP.6.200

H. Shimpo, C. Ohkubo, Noboru Kawamura, K. Kurtz, Y. Kokubo, Tatsuya Suzuki, T. Hosoi

{"title":"A Procera® Custom Abutment Fabricated by Scanning the Provisional Abutment","authors":"H. Shimpo, C. Ohkubo, Noboru Kawamura, K. Kurtz, Y. Kokubo, Tatsuya Suzuki, T. Hosoi","doi":"10.2186/PRP.6.200","DOIUrl":"https://doi.org/10.2186/PRP.6.200","url":null,"abstract":"Patient: The patient was a 56-year-old male presenting with a missing maxillary right central incisor. Subsequently, an endosseous implant was fiited. After a 6 month healing period, a provisional abutment was fabricated to an optimal shape on the provisional titanium component. After confirming custom-guided tissue healing and appropriate emergence profile, the provisional abutment was scanned using the Procera® scanner. The CAD/CAM custom titanium definitive abutment and the definitive porcelain fused to the metal crown were delivered as an esthetic implant restoration.Discussion: Compared to conventional procedures, the following advantages can be seen: 1. There is no access hole in the provisional restorations. 2. Appropriate soft-tissue contours can be induced by modification of provisional restoration. 3. A definitive abutment with the identical contours can be reliably obtained using CAM. 4. An extra temporary plastic component is not necessary. The disadvantages are: 1. The provisional abutment using the temporary cylinder has to be made. 2. The Procera® scanner has to be set up chair-side. 3. The patient has to wait during scanning.Conclusion: A custom Procera® abutment with an ideal emergence profile can be fabricated by scanning the provisional abutment with appropriate soft-tissue contours.","PeriodicalId":306414,"journal":{"name":"Prosthodontic Research & Practice","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131137669","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}

引用次数: 0

Effect of Clinicians' Experience on Chair Time and the Number of Denture Adjustment Visits Required for Complete Denture Treatment 临床医生经验对全口义齿治疗中坐椅时间和义齿调整次数的影响

Prosthodontic Research & Practice Pub Date : 2007-07-01 DOI: 10.2186/PRP.6.166

S. Kimoto, K. Kimoto, Kinya Tanaka, Ai Takeo, Kaori Sugimura, Yasuo Imamichi, H. Asai, Mitsuto Ito, H. Aoki, M. Toyoda, Kihei Kobayashi

{"title":"Effect of Clinicians' Experience on Chair Time and the Number of Denture Adjustment Visits Required for Complete Denture Treatment","authors":"S. Kimoto, K. Kimoto, Kinya Tanaka, Ai Takeo, Kaori Sugimura, Yasuo Imamichi, H. Asai, Mitsuto Ito, H. Aoki, M. Toyoda, Kihei Kobayashi","doi":"10.2186/PRP.6.166","DOIUrl":"https://doi.org/10.2186/PRP.6.166","url":null,"abstract":"Purpose: The purpose of this study was to demonstrate how a clinician’s experience might affect the complete denture treatment.Methods: A randomized controlled parallel clinical trial at two hospitals was conducted from April 2004 to July 2006. Written informed consent was obtained from the study subjects. Permuted-block randomization was performed with a block size of 4, indicating that not only was the clinician’s experience randomized) but also the denture base materials used (conventional acrylic resin and resilient liner). The chair time required for each step of complete denture treatment was compared between the junior clinician and senior clinician groups. The clinical protocol was carried out as follows: the preliminary impression, final impression, maxillomandibular registration, trial placement, denture delivery, and the number of visits for denture adjustments. Seventy-four subjects were assigned to this trial.Results: Significant differences were observed between the junior clinician and senior clinician groups with regard to chair time required for final impressions and the number of visits required for denture adjustments. There were no differences in chair time required for the other treatment steps.Conclusion: This randomized controlled clinical trial revealed that a clinician’s experience has an obvious influence on the chair time required for a final impression and the number of visits for denture adjustment.","PeriodicalId":306414,"journal":{"name":"Prosthodontic Research & Practice","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122296443","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}

引用次数: 18

Research Projects Related to Complete Dentures Published in 2006 by Members of the Japan Prosthodontic Society 2006年日本修复学会成员发表的全口义齿相关研究项目

Prosthodontic Research & Practice Pub Date : 2007-07-01 DOI: 10.2186/PRP.6.145

H. Nikawa

引用次数: 0