Asian Pacific Journal of Dentistry最新文献_第2页

Bonding performance of self-adhesive luting agents to highly translucent zirconia ceramics 高半透明氧化锆陶瓷的自粘粘接性能研究

Asian Pacific Journal of Dentistry Pub Date : 1900-01-01 DOI: 10.47416/APJOD.20-0276

Toyoaki Kobayashi, T. Takagaki, R. Takahashi, M. Ikeda, J. Tagami

{"title":"Bonding performance of self-adhesive luting agents to highly translucent zirconia ceramics","authors":"Toyoaki Kobayashi, T. Takagaki, R. Takahashi, M. Ikeda, J. Tagami","doi":"10.47416/APJOD.20-0276","DOIUrl":"https://doi.org/10.47416/APJOD.20-0276","url":null,"abstract":"Purpose: The purpose of this study was to evaluate the long-term durability of the bonds between self-adhesive luting agents and yttria-stabilized partially stabilized zirconia (Y-PSZ) and the effect of phosphoric acid etching as a surface pre-treatment to Y-PSZ. Materials and Methods: A total of 180 Y-PSZ disks were divided into two groups; the control group and the phosphoric acid etching group prior to the bonding with one of three self-adhesive luting agents; Panavia SA Cement Plus Automix (SAP), RelyX Unicem2 Automix (UC2), or Maxcem Elite Chroma (MXE). Bonded specimens were stored in distilled water, for 1 day, 30 days, or 150 days. After storage, the tensile bond strength was measured using a universal testing machine. The data were statistically analyzed using Welch's t -test and Welch's t -test with Bonferroni correction ( α = 0.05). Results: The tensile bond strength of each luting agent measured more than 15 MPa after 1 day of immersion in distilled water with or without phosphoric acid etching. There were no significant differences between SAP and UC2 after 30 days and 150 days ( p > 0.05) of immersion. SAP and UC2 showed significantly higher bond strength than MXE after 30 days and 150 days (p < 0.05) of immersion. There were no significant differences between with/without phosphoric acid etching in all groups ( p > 0.05). agent to Y-PSZ was material-dependent. A surface pre-treatment with phosphoric acid etching to Y-PSZ did not affect the bond strength of self-adhesive luting agent to Y-PSZ. (Asian Pac J Dent 2020; 20: 29-33. doi: 10.47416/apjod.20-0276)","PeriodicalId":433454,"journal":{"name":"Asian Pacific Journal of Dentistry","volume":"49 2 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":"116278557","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 ultraviolet ray on tooth bleaching using titanium dioxide photocatalyst 紫外线对二氧化钛光催化剂漂白牙齿的影响

Asian Pacific Journal of Dentistry Pub Date : 1900-01-01 DOI: 10.47416/APJOD.20-0277

Y. Tanno, M. Otsuki, Miho Nishimura, Minh N Luong, T. Takagaki, M. Nakajima, Y. Sumi, J. Tagami

{"title":"Effect of ultraviolet ray on tooth bleaching using titanium dioxide photocatalyst","authors":"Y. Tanno, M. Otsuki, Miho Nishimura, Minh N Luong, T. Takagaki, M. Nakajima, Y. Sumi, J. Tagami","doi":"10.47416/APJOD.20-0277","DOIUrl":"https://doi.org/10.47416/APJOD.20-0277","url":null,"abstract":"Purpose: The purpose of this study was to evaluate the effect of ultraviolet ray (UV) on tooth bleaching using titanium dioxide photo catalyst in vitro . Materials and Methods: Hematoporphyrin-stained paper (HSP) and artificially discolored bovine teeth (BT) were bleached by an in-office bleaching material containing low concertation of hydrogen peroxide and titanium dioxide photocatalyst. For the bleaching, light irradiation was performed at wavelengths of 265, 310, 365, 405, and 450 nm for HSP, and 265, 300, and 405+470 nm for BT. Before and after bleaching, color was measured to obtain CIE L*a*b* values. The color differences (ΔE) were calculated and were statistically analyzed. Results: In the HSP experiment, the 265 and 310 nm groups showed a remarkable bleaching effect and ΔE of the 310 nm group was statistically the highest ( p < 0.05). In the BT experiment, ΔE of the 265 nm group was statistically the highest followed by 300 nm, then 405+470 nm groups ( p < 0.05). Conclusion: UV-C (265 nm) and UV-B (300 and 310 nm) showed high bleaching effect with an in-office bleaching material containing low concentration of hydrogen peroxide and titanium dioxide photocatalyst. 20 Ten were bleached in each ( 10). After light irradiation, the bleaching material was removed. Before and after the bleaching procedure, a photograph was taken with a digital camera and the color of the HSP surface was measured by a CIE XYZ camera (RC500, PaPaLaB, Hamamatsu, Japan) and CIE L*a*b* values were obtained. The color difference (ΔE) was calculated using the following equation.","PeriodicalId":433454,"journal":{"name":"Asian Pacific Journal of Dentistry","volume":"38 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":"126997850","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

Stress distribution in crown and root dentin associated with different crown materials and thicknesses 不同冠层材料和冠层厚度对牙本质应力分布的影响

Asian Pacific Journal of Dentistry Pub Date : 1900-01-01 DOI: 10.47416/apjod.19-0269

C. Shin, D. Okada, R. Ogura, Ling Huang, Kunihiko Mizusawa, Keiichi Yoshida, H. Miura

引用次数: 2

Effect of light curing method and thermal cycling on resin composite adaptation to the cavity wall 光固化方法和热循环对树脂复合材料对腔壁适应性的影响

Asian Pacific Journal of Dentistry Pub Date : 1900-01-01 DOI: 10.47416/apjod.19-0268

T. Yoshikawa, A. Sadr, J. Tagami

{"title":"Effect of light curing method and thermal cycling on resin composite adaptation to the cavity wall","authors":"T. Yoshikawa, A. Sadr, J. Tagami","doi":"10.47416/apjod.19-0268","DOIUrl":"https://doi.org/10.47416/apjod.19-0268","url":null,"abstract":"Purpose: This study evaluated the effects of the light curing methods and thermal cycling on adaptation to the cavity wall of different type of resin composite using a dye penetration test. Materials and Methods: Cylindrical cavities with one-half enamel and one-half dentin margins were prepared on the labial cervical region of bovine incisors. Cavities were restored using Clearfil tri-S Bond ND Quick and filled with Clearfil AP-X or Clearfil Photo Bright composite. The resin composites were cured using the conventional or the slow-start curing method. Half of specimens were thermocycled. Results: Clearfil AP-X showed significantly greater cavity-wall gap formation than that of Clearfil Photo Bright with both the conventional curing method and slow-start curing method with thermal cycling at 500 cycles (p < 0.05). The slow-start curing method showed significantly improved resin composite adaptation to the cavity wall compared with the conventional curing method for thermocycled Clearfil Photo Bright specimens (p < 0.05). Thermal cycling at 500 cycles significantly decreased cavity-wall gap formation compared with 0 cycle for Clearfil Photo Bright resin composites (p < 0.05). Clearfil Photo Bright using the slow-start curing method with thermal cycling at 500 cycles showed least cavity-wall gap formation. Conclusion: Light-cured composite, increased contrast ratio during polymerization with thermal cycling at 500 cycles, improved adaptation to the cavity wall using the slow-start curing method. The slow-start curing method facilitated the high reduction for residual stress of composite that had increased contrast ratio. (Asian Pac J Dent 2019; 19: 59-64.)","PeriodicalId":433454,"journal":{"name":"Asian Pacific Journal of Dentistry","volume":"72 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":"131570516","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 F:Ca:P ratio on fluoride deposition by fluoride-calcium-phosphate complex F:Ca:P比对氟-磷酸钙配合物沉积氟的影响

Asian Pacific Journal of Dentistry Pub Date : 1900-01-01 DOI: 10.47416/apjod.23-0294

Go Inoue, Y. Shimada

引用次数: 0

Recycling of used alginate impression materials into final polishing powder for methacrylate denture base resins 回收利用海藻酸盐印模材料制成甲基丙烯酸酯义齿基托树脂抛光粉

Asian Pacific Journal of Dentistry Pub Date : 1900-01-01 DOI: 10.47416/APJOD.21-0278

Tomokuni Waki, Toshiko Sawada, H. Ishigami, K. Shintani, K. Okuyama, Y. Tamaki

{"title":"Recycling of used alginate impression materials into final polishing powder for methacrylate denture base resins","authors":"Tomokuni Waki, Toshiko Sawada, H. Ishigami, K. Shintani, K. Okuyama, Y. Tamaki","doi":"10.47416/APJOD.21-0278","DOIUrl":"https://doi.org/10.47416/APJOD.21-0278","url":null,"abstract":"Purpose: The purpose of this study was to recycling diatomite from alginate impression materials and investigate its potential as an abrading agent for denture base resins. Materials and Methods: After heating hardened alginate impression materials, a lump-like solid was powdered using a mortar and a pestle. The powder (experimental sand, ES) was characterized by X-ray diffraction (XRD). To explore the suitable ES/wax ratio, three amounts (1, 3, and 5 g, corresponding to samples ES1, ES3, ES5, respectively) were blended with 6 g of casting wax. Casting wax bars without ES were also prepared as the control. In addition, commercial diatomite (reagent-grade diatomite, RD) and a commercial final polishing product for acrylic resin (TE) were examined and compared. A disk-shaped self-curing resin (diameter: 30 mm, thickness: 3 mm) was prepared as a specimen and ground by polishing paper (#800-1,000). Surface gross measurements and surface roughness values after polishing were determined using a gross meter. These surface roughness and gloss data were statistically analyzed by one-way ANOVA and Tukey’s multiple comparison test (α = 0.05). Results: Based on the XRD results, diatomite was successfully detected in the heated alginate impression material. Sample ES3 showed good performance in experimental polishing tools, and its polishing effects were almost identical to those of RD. However, ES3 was inferior to TE in terms of surface gloss, and ES0 exhibited no polishing effect. Conclusion: Within this limited study, diatomite obtained from alginate gel was found to be effective as the final polishing material in denture base resin. (Asian Pac J Dent 2021; 21: 1-6. doi: 10.47416/apjod.21-0278)","PeriodicalId":433454,"journal":{"name":"Asian Pacific Journal of Dentistry","volume":"7 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":"124076989","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

Magnetic resonance imaging assessment of temporomandibular joint effusion with limitation of mouth opening after arthroscopic lysis and lavages 关节镜下溶解和灌洗后伴有开口受限的颞下颌关节积液的磁共振成像评价

Asian Pacific Journal of Dentistry Pub Date : 1900-01-01 DOI: 10.47416/apjod.21-0285

C. Igarashi, K. Kobayashi

{"title":"Magnetic resonance imaging assessment of temporomandibular joint effusion with limitation of mouth opening after arthroscopic lysis and lavages","authors":"C. Igarashi, K. Kobayashi","doi":"10.47416/apjod.21-0285","DOIUrl":"https://doi.org/10.47416/apjod.21-0285","url":null,"abstract":"Purpose: The purpose of this study was to analyse the correlation between the presence of temporomandibular joint (TMJ) effusion and limitation of mouth opening after arthroscopic surgery. Methods: The authors studied 88 joints in 86 patients with TMJ disorders who underwent lysis and lavage in the superior space of the TMJ. The patients were referred for magnetic resonance (MR) imaging before and after surgery. The joints were divided into two categories based on the presence of TMJ effusion. Chi-square tests were used to evaluate differences between distributions for these two groups. The alpha level was set to 0.05. Results: The number of joints with effusion decreased after surgery. However, after surgery, there was no significant difference between the distributions of TMJ effusion for TMJs with and without limitation of mouth opening. Conclusion: The amount of joint effusion in the temporomandibular joint decreased after surgery, but the effusion did not completely disappear even after the clinical symptoms improved. It was suggested that the joint effusion naturally accumulates in a vacant space, the upper joint space located in the lateral recess. (Asian Journal of Dentistry,","PeriodicalId":433454,"journal":{"name":"Asian Pacific Journal of Dentistry","volume":"28 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":"122764181","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

Suppression of opportunistic infectious bacteria by lactic acid bacteria and antibacterial drugs 乳酸菌与抗菌药物对机会感染性细菌的抑制作用

Asian Pacific Journal of Dentistry Pub Date : 1900-01-01 DOI: 10.47416/apjod.19-0255

T. Nakano, S. Imai, Takumi Ishikawa, Tomohiko Terai, T. Okumura, N. Hanada, H. Kawahara

{"title":"Suppression of opportunistic infectious bacteria by lactic acid bacteria and antibacterial drugs","authors":"T. Nakano, S. Imai, Takumi Ishikawa, Tomohiko Terai, T. Okumura, N. Hanada, H. Kawahara","doi":"10.47416/apjod.19-0255","DOIUrl":"https://doi.org/10.47416/apjod.19-0255","url":null,"abstract":"Purpose: The objective of this study was to investigate inhibitory effect of lactic acid bacteria and antibiotics on the growth of Streptococcus pneumoniae ATCC 33400. Materials and Methods: Antibiotic activities of five oral probiotic candidate bacteria including two strains of Lactobacillus crispatus, Lactobacillus fermentum, Lactobacillus gasseri and Streptococcus mitis and several antibiotics against S. pneumoniae were investigated using radial diffusion assay and competition assay. The biofilm formation of S. pneumoniae in the presence of 50% saturated ammonium sulfate precipitation fraction from L. gasseri and several concentrations of gentamicin were monitored by real time cell analyzer, xCELLigence. Results: The growth of S. pneumoniae was inhibited by two strains of Lactobacillus crispatus, Lactobacillus fermentum and Lactobacillus gasseri. The saturated ammonium sulfate precipitation fraction (0-30% and 30-50%) from L. gasseri effectively inhibited growth of S. pneumoniae. The biofilm formation of S. pneumoniae monitored by real time cell analyzer (xCELLigence) was suppressed by gentamicin in dose dependent manner. Antibacterial substance from L. gasseri against S. pneumoniae was suggested to be small molecular weight substance. Conclusion: L. gasseri inhibited the growth of S. pneumoniae suggesting that L. gasseri will be a candidate of probiotics. (Asian Pac J Dent 2019; 19: 17-25.)","PeriodicalId":433454,"journal":{"name":"Asian Pacific Journal of Dentistry","volume":"41 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":"113957906","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

Effect of radiotherapy on resin composite adaptation to the cavity wall and elastic modulus of dentin 放射治疗对树脂复合材料对牙本质腔壁适应性及弹性模量的影响

Asian Pacific Journal of Dentistry Pub Date : 1900-01-01 DOI: 10.47416/apjod.19-0260

T. Yoshikawa, M. Arakawa, J. Tagami

{"title":"Effect of radiotherapy on resin composite adaptation to the cavity wall and elastic modulus of dentin","authors":"T. Yoshikawa, M. Arakawa, J. Tagami","doi":"10.47416/apjod.19-0260","DOIUrl":"https://doi.org/10.47416/apjod.19-0260","url":null,"abstract":"Purpose: This study aimed to evaluate the effects of 60 Gy γ-ray irradiation on the adaptation of resin composite restorations using two-step and one-step self-etching systems. Materials and Methods: One-half of bovine incisors were irradiated with 60 Gy γ-ray. Flat dentin surfaces were prepared on labial side. Cylindrical cavities were prepared on flat dentin surfaces. Cavities were restored with a two-step self-etching system Clearfil SE Bond or a one-step self-etching system Clearfil tri-S Bond adhesive, followed by Clearfil AP-X composite. The composites were light-cured with 600 mW/cm for 40 s. One-half of the specimens were thermocycled for 5,000 cycles. Dye penetration tests around the restorations were performed. Results: Irradiation with 60 Gy γ-ray significantly decreased resin composite adaptation for the nonthermocycled Clearfil SE Bond (p < 0.05). Clearfil tri-S Bond showed significantly decreased cavity wall adaptation compared with Clearfil SE Bond, regardless of the number of thermal cycling and γ-ray irradiation (p < 0.05). Irradiation with 60 Gy γ-ray significantly decreased nanohardness and elastic modulus of the dentin (p < 0.05). Conclusion: Irradiation with 60 Gy γ-ray significantly decreased resin composite adaptation for the non-thermocycled Clearfil SE bond. Further, nanohardness and elastic modulus of the dentin significantly decreased after the irradiation. (Asian Pac J Dent 2019; 19: 39-44.)","PeriodicalId":433454,"journal":{"name":"Asian Pacific Journal of Dentistry","volume":"78 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":"115274655","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

Medical-dental and hospital-clinic collaboration in Iwate Prefecture in Japan 日本岩手县的医疗-牙科和医院-诊所合作

Asian Pacific Journal of Dentistry Pub Date : 1900-01-01 DOI: 10.47416/apjod.19-0270

Ayako Okada, Y. Nomura, E. Kakuta, Ryoko Otsuka, Hiroshi Maekawa, H. Daikoku, N. Hanada, Tamotsu Sato

{"title":"Medical-dental and hospital-clinic collaboration in Iwate Prefecture in Japan","authors":"Ayako Okada, Y. Nomura, E. Kakuta, Ryoko Otsuka, Hiroshi Maekawa, H. Daikoku, N. Hanada, Tamotsu Sato","doi":"10.47416/apjod.19-0270","DOIUrl":"https://doi.org/10.47416/apjod.19-0270","url":null,"abstract":"Purpose: Japanese government has been promoted community-based integrated care systems which provide seamless community healthcare resources for elderly people. In this system, medical-dental collaboration and hospital-clinic collaboration play important roles. In this study, to understand the actual the situation, survey was conducted for the member of the Iwate Dental Association and analyzed the difficulty of the collaboration and the regional differences. Materials and Methods: The questionnaires were distributed to 609 all members of Iwate Dental Association. Implementation of dental treatment for mentally handicapped patients, the experiences of dental treatment for patients with diseases, the experiences of participated in nutrition support team and dental rounds at the hospital, dental treatment after nutrition support team rounds, dental and oral care at the hospital or medical clinic, participated in a collaborative conference at the hospital were surveyed. Data were analyzed by item response theory and correspondence analysis. Results: The 354 members retuned the questionnaire (collection rate was 58.1%). The 216/343 (61%) of dental clinic had experienced the dental treatment of the patients with mental handicap. Participation of nutrition support team and dental treatment after nutrition support ream round had high discrimination ability for the medical and dental collaboration. By the correspondence analysis, regional differences can be observed. Conclusion: There were the regional differences in the supply of the medical-dental and hospital-clinic collaboration service in Iwate Prefecture. Providing information for the members of team approach may be one of the resolutions for the regional difference. (Asian Pac J Dent 2019; 19: 77-84.)","PeriodicalId":433454,"journal":{"name":"Asian Pacific Journal of Dentistry","volume":"4 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":"129414768","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