Asian Pacific Journal of Dentistry最新文献_第3页

Effect of surface treatment on bond strength between zirconia and composite resin core material 表面处理对氧化锆与复合树脂芯材粘结强度的影响

Asian Pacific Journal of Dentistry Pub Date : 1900-01-01 DOI: 10.47416/apjod.22-0288

Mitsunori Uno, S. Kusakabe, H. Ishigami, Y. Doi

引用次数: 0

Effects of hydrophilic and hydrophobic surface modifications on poly(methyl methacrylate) denture base resins 亲疏水表面改性对聚甲基丙烯酸甲酯基托树脂的影响

Asian Pacific Journal of Dentistry Pub Date : 1900-01-01 DOI: 10.47416/apjod.19-0254

S. Mitsuda, S. Ino, T. Nihei, Y. Umeda, Mitsuhiro Watanabe, O. Takai, H. Honma

{"title":"Effects of hydrophilic and hydrophobic surface modifications on poly(methyl methacrylate) denture base resins","authors":"S. Mitsuda, S. Ino, T. Nihei, Y. Umeda, Mitsuhiro Watanabe, O. Takai, H. Honma","doi":"10.47416/apjod.19-0254","DOIUrl":"https://doi.org/10.47416/apjod.19-0254","url":null,"abstract":"Purpose: Several hydrophilic and hydrophobic approaches have been developed to prevent food debris and plaque accumulation on the denture surface. In this study, we evaluated the possibility of developing a high-functioning self-cleaning denture. Materials and Methods: Denture base resin specimens were divided into the following groups based on the type of surface treatment: control (no treatment); hydrophilic (UV irradiation or tribochemical coating); and hydrophobic (plasma chemical vapor deposition, CVD). Surface analyses were conducted using X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, and atomic force microscopy. Physical strength was evaluated using the three point bending test. Data were analyzed using one-way analysis of variance followed by multiple comparisons. Results: The self-cleaning effects of the hydrophilic treatments were unsatisfactory; alternatively, the hydrophobicity, mechanical properties, and self-cleansing ability of the CVD specimens were significantly high (p < 0.05). Conclusion: Hydrophobic surface modifications effectively improved the water repelling properties of the resin without compromising its mechanical properties. (Asian Pac J Dent 2019; 19: 1-8.)","PeriodicalId":433454,"journal":{"name":"Asian Pacific Journal of Dentistry","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116085916","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

Evaluation of cleaning efficacy-related properties of root canal irrigant activation using a computer-controlled hot tip powered with a diode laser 用二极管激光驱动的计算机控制热尖端评价根管冲洗激活的清洁效果相关特性

Asian Pacific Journal of Dentistry Pub Date : 1900-01-01 DOI: 10.47416/apjod.19-0256

Tomoyuki Hongo, S. Watanabe, Kanako Yao, Kazuhisa Satake, T. Okiji

{"title":"Evaluation of cleaning efficacy-related properties of root canal irrigant activation using a computer-controlled hot tip powered with a diode laser","authors":"Tomoyuki Hongo, S. Watanabe, Kanako Yao, Kazuhisa Satake, T. Okiji","doi":"10.47416/apjod.19-0256","DOIUrl":"https://doi.org/10.47416/apjod.19-0256","url":null,"abstract":"Purpose: This study aimed to examine root canal irrigant activation using a computer-controlled hot tip (thermo-optically powered [TOP] tip) heated with a 980 nm diode laser system (Alta Modular Laser System), with regard to vaporized bubble formation and soft tissue dissolution capacity. Materials and Methods: As a parameter of cleaning efficacy, the number and size of vaporized bubbles generated in root canal models during TOP tip-induced activation were analyzed with high-speed digital video imaging. To evaluate the soft tissue-dissolving efficacy of TOP tip-induced activation with a sodium hypochlorite irrigant, dissolution of porcine soft tissues filled in lateral canals set at two levels in root canal models were morphometrically analyzed. Irrigant temperature during TOP tip-induced activation was measured with thermocouples attached to the apical foramen and the lateral canals of root canal models. Results: High-speed video imaging revealed that TOP tip-induced activation of the water that filled the root canal models, required less time to achieve the first bubble formation and generated a larger number of bubbles than a normal clear tip-induced activation using the same laser. NaOCl solution activated with TOP tip dissolved more soft tissues filled in lateral canals of the canal models, than with passive ultrasonic irrigation and syringe irrigation. Irrigant temperature during TOP tip-induced activation showed a maximum increase of approximately 50 ̊C near the lateral canal, as measured with thermocouples. Conclusion: Under the present experimental conditions, TOP tip-induced irrigant activation exerted better cleaning efficacy-related properties than the other methods tested. (Asian Pac J Dent 2019; 19: 9-15.)","PeriodicalId":433454,"journal":{"name":"Asian Pacific Journal of Dentistry","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133480224","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

Dental treatment service supplement in four townships in Chin state in Myanmar 缅甸钦邦四个乡镇的牙科治疗服务补充

Asian Pacific Journal of Dentistry Pub Date : 1900-01-01 DOI: 10.47416/apjod.19-0258

Ryoko Otsuka, Y. Nomura, Sasara Ebara, Pallavi Kar, Nang Khab Lian, Thang Hau Mung, Niang Hu Ching, Pau Lam Thawn, Zaw Naing, Ryo Hasegawa, Khin Maung, N. Hanada

{"title":"Dental treatment service supplement in four townships in Chin state in Myanmar","authors":"Ryoko Otsuka, Y. Nomura, Sasara Ebara, Pallavi Kar, Nang Khab Lian, Thang Hau Mung, Niang Hu Ching, Pau Lam Thawn, Zaw Naing, Ryo Hasegawa, Khin Maung, N. Hanada","doi":"10.47416/apjod.19-0258","DOIUrl":"https://doi.org/10.47416/apjod.19-0258","url":null,"abstract":"Purpose: The purpose of this project is to compare the dental services by national hospital of three areas in Chin state, Myanmar. Materials and Methods: Demographic statistics were collected form Township health profile of every township stocked in municipal office. Number of patients who attended at the dental clinic within four national hospitals was summarized by month and year. The diagnosis and contents of treatment were summarized by year. In addition, fluoride concentration of tap water was measured. Results: Number of the patients who visited for the national hospital is fluctuated by month because of the school dental health checkups and landslide that prevent the people in local area to the national hospital. The most of the dental disease diagnosed were dental caries and pulpitis. More than seventy percent of the treatment was filling and extraction. Conclusion: The primary health care is not sufficient in Chin sate. In addition, health promotion is important especially health education. To promote these concepts, there still existed many obstacles in Chin state in Myanmar. (Asian Pac J Dent 2019; 19: 27-31.)","PeriodicalId":433454,"journal":{"name":"Asian Pacific Journal of Dentistry","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116366005","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: 1

Change of dentin surface by low-power irradiation of erbium-doped yttrium aluminum garnet laser 掺铒钇铝石榴石激光低功率照射牙本质表面的变化

Asian Pacific Journal of Dentistry Pub Date : 1900-01-01 DOI: 10.47416/apjod.19-0257

A. Nakane, M. Otsuki, J. Tagami

{"title":"Change of dentin surface by low-power irradiation of erbium-doped yttrium aluminum garnet laser","authors":"A. Nakane, M. Otsuki, J. Tagami","doi":"10.47416/apjod.19-0257","DOIUrl":"https://doi.org/10.47416/apjod.19-0257","url":null,"abstract":"Purpose: The objective of this study was to evaluate the effect of low output power irradiation of erbium-doped yttrium aluminum garnet (Er:YAG) laser on surface morphology, roughness, and microhardness of the root dentin. Materials and Methods: Flat root dentin surfaces were prepared from extracted human molars. The surfaces were irradiated by an Er:YAG laser at 10 pps, 30 mJ, sweeping at approximately 2 mm/s by hand. Irradiated power was changed by means of the distance between laser tip and surface kept at 0, 5, 10, 15, 20, 25, 30, 35, and 40 mm. No irradiated surface was employed as control. Those surfaces and crosscut surfaces were observed by a scanning electron microscope (SEM). Specimens of irradiation distance at 0, 5, 10, 20, 30, and 40 mm and control (no irradiation) were further prepared and then, surface roughness (Ra) and microhardness (Vickers hardness) were measured. Results: Ablation of dentin was observed at distance between 0-15 mm. At 20-30 mm, degenerated layer was observed without ablation. At 35 and 40 mm, ablation and degenerated layer were not found. Ra values of all experimental groups (0-40 mm) showed statistically higher than that of control group (p < 0.05). Among the experimental groups, 0 mm group showed statistically higher Ra values than the other groups (p < 0.05). For Vickers hardness, no significant difference was found all groups except 0 mm group (p > 0.05). Conclusion: It was concluded that specific low output power Er:YAG laser irradiation produced thin degenerated layer on the root dentin without ablation. This irradiated surfaces showed slight increase of roughness without decrease of microhardness. (Asian Pac J Dent 2019; 19: 33-37.)","PeriodicalId":433454,"journal":{"name":"Asian Pacific Journal of Dentistry","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116639154","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

Micrographic and spectroscopic analyses of the application of methyl methacrylate-p-styrene sulfonic acid copolymer-based desensitizing agents to bovine dentin 基于甲基丙烯酸甲酯-对苯乙烯磺酸共聚物的牛牙本质脱敏剂的显微和光谱分析

Asian Pacific Journal of Dentistry Pub Date : 1900-01-01 DOI: 10.47416/apjod.19-0264

A. Kameyama, Akiko Haruyama, Y. Nakazawa, M. Furusawa, T. Muramatsu

{"title":"Micrographic and spectroscopic analyses of the application of methyl methacrylate-p-styrene sulfonic acid copolymer-based desensitizing agents to bovine dentin","authors":"A. Kameyama, Akiko Haruyama, Y. Nakazawa, M. Furusawa, T. Muramatsu","doi":"10.47416/apjod.19-0264","DOIUrl":"https://doi.org/10.47416/apjod.19-0264","url":null,"abstract":"Purpose: This study compared the ability of three methyl methacrylate (MMA)-p-styrene sulfonic acid copolymer (MS polymer)-based desensitizers (Pain-Free Gel Dentin Desensitizer; PF-Gel, No-Mix Pain-Free Desensitizer; PF, No-Mix Pain-Free F Desensitizer; PF-F) to occlude dentinal tubules. Materials and Methods: Dentin disc specimens were prepared from bovine incisors and the desensitizers were applied. After dehydration for 24 h or immersion for 1 week in artificial saliva, the surfaces were observed by scanning electron microscope (SEM). PF-Gel specimens also underwent SEM/energy dispersive X-ray spectroscopy (EDS). Results: Application of the desensitizers produced complete occlusion of the dentinal tubules. Most dentinal tubules re-opened after immersion for 1 week in artificial saliva (PF and PF-F samples), but in PF-Gel samples, the dentinal tubules remained occluded. SEM/EDS analysis demonstrated that the granular crystals adhering to the dentin surface contained oxygen, carbon, and calcium, and the plugs occluding the dentinal tubules contained calcium and phosphorus. Conclusion: The findings in this study confirm the sustainable effect of PF-Gel on the occlusion of dentinal tubules. (Asian Pac J Dent 2019; 19: 51-57.)","PeriodicalId":433454,"journal":{"name":"Asian Pacific Journal of Dentistry","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133615440","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

The effects of various surface treatments on the bond strength between lithium disilicate pressed-ceramics and luting agent 研究了不同表面处理对二硅酸锂压制陶瓷与粘结剂结合强度的影响

Asian Pacific Journal of Dentistry Pub Date : 1900-01-01 DOI: 10.47416/apjod.21-0284

Takushi Fukuyama, N. Hamano, H. Iwashita, Y. Tsujimura, Tota Shimizu, S. Ino

{"title":"The effects of various surface treatments on the bond strength between lithium disilicate pressed-ceramics and luting agent","authors":"Takushi Fukuyama, N. Hamano, H. Iwashita, Y. Tsujimura, Tota Shimizu, S. Ino","doi":"10.47416/apjod.21-0284","DOIUrl":"https://doi.org/10.47416/apjod.21-0284","url":null,"abstract":"Purpose: This study aimed to evaluate the effects of various surface treatments, including resin coating, on the bond strength between lithium disilicate ceramics and luting agent. Materials and Methods: All specimens were air-abraded with alumina particles and separated into the following four groups based on the surface treatment method used: silane coupling agent (PA); multipurpose ceramic/metal primer (CP); multipurpose ceramic/metal primer with resin coating (CM); and silica coating with multipurpose ceramic/metal primer followed by resin coating (RM). A luting agent was placed on the treated surface and photopolymerized. The shear bond strengths of the materials were measured after 10,000 thermal cycles. Results: The bond strengths of the specimens in the PA group were significantly higher than those in the CP group. CM and RM groups presented with significantly higher bond strengths than CP. Conclusion: The combination of multipurpose ceramic/metal primers and resin coating can significantly increase the bond strength between lithium disilicate ceramics and luting agent. (Asian Pac J Dent 2021; 21: 23-28. doi: 10.47416/apjod.21-0284)","PeriodicalId":433454,"journal":{"name":"Asian Pacific Journal of Dentistry","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114971050","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 cantilever all-ceramic resin-bonded fixed dental prosthesis using digital technology for a patient with cleft lip and palate 采用数字技术为唇腭裂患者制作悬臂式全陶瓷树脂粘接固定义齿

Asian Pacific Journal of Dentistry Pub Date : 1900-01-01 DOI: 10.47416/APJOD.21-0279

Y. Takaesu, Y. Taniguchi, N. Kaga, Kota Isshi, H. Kido, T. Matsuura, Hironobu Sato

引用次数: 0

Thirty-three-year clinical performance of premolar indirect composite restorations seated with 4-META-MAC 10 combined adhesive system 4-META-MAC - 10复合粘接剂系统前磨牙间接复合修复体33年临床表现

Asian Pacific Journal of Dentistry Pub Date : 1900-01-01 DOI: 10.47416/apjod.23-0292

Mitsuo Nakamura, Haruto Hiraba

引用次数: 0

Resin composites top/bottom hardness and different light cure 树脂复合材料顶/底硬度及不同光固化

Asian Pacific Journal of Dentistry Pub Date : 1900-01-01 DOI: 10.47416/apjod.21-0282

T. Yoshikawa, A. Sadr

{"title":"Resin composites top/bottom hardness and different light cure","authors":"T. Yoshikawa, A. Sadr","doi":"10.47416/apjod.21-0282","DOIUrl":"https://doi.org/10.47416/apjod.21-0282","url":null,"abstract":"Purpose: The aim of this study was to evaluate microhardness and hardness ratio of two type hybrid resin composites using different irradiance light sources. Materials and Methods: Light curing units were an LED light-curing unit and an experimental quartz-tungsten-halogen (QTH) light-curing unit. The light-cured resin composites were Clearfil AP-X (shade A3) and Estelite ∑Quick (shade A3). Composite specimens of 2-mm thickness were polymerized in Teflon molds using an energy density of 24,000 mJ/cm 2 . Light curing methods were LED 1,200 mW/cm 2 for 20 s and QTH 600 mW/cm 2 for 40 s. Just after light curing, the Knoop hardness was measured at the top and bottom surfaces of each specimen. The hardness ratio was calculated as follows: Knoop hardness of bottom surface/Knoop hardness of top surface. Results: Immediately after light curing, the Knoop hardness at the bottom surfaces of resin composites was significantly lower than that at the top surfaces with 1,200 mW/cm 2 20 s for both resin composite ( p < 0.05). There is no significant difference between the Knoop hardness at the top surfaces and the bottom surfaces with 600 mW/cm 2 40 s for both resin composite ( p > 0.05). The 600 mW/cm 2 40 s showed significantly greater hardness ratio compared with that of the 1,200 mW/cm 2 20 s for both resin composite ( p < 0.05). Conclusion: The polymerization of resin composites at the bottom surface was inhibited compared with that of at the top surface using the regular irradiance of LED light.","PeriodicalId":433454,"journal":{"name":"Asian Pacific Journal of Dentistry","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131088314","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