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Fracture and Tribological Evaluation of Dental composite resins Containing Pre-polymerized Particle Fillers

中华口腔医学会第14次全国口腔医学学术会议（2012年...

作者： School of Stomatology,Shanghai Jiao Tong University School of Medicine(200011) Han Yanyan,Zhu Yaqin

Objective:To compare the effects of three antioxidants(sodium ascorbate,sodium ascorbate combined with a surfactant—Tween,catalase)on the microleakage of composite resin restorations after external tooth bleaching with 10%carbamide peroxide,to find effective ways to reduce microleakage. Methods:Sixty extracted human premolars,intact and health,were randomly divided into six groups:group 1,direct composite resin filling without bleaching;group 2 composite resin filling immediately after bleaching;group 3,immersed in artificial saliva three weeks after bleaching,then composite resin filling;group 4,cavity treated with sodium ascorbate after bleaching and then composite resin filling;group 5,cavity treated with sodium ascorbate combined with Tween after bleaching and then composite resin filling;group 6,cavity treated with catalase after bleaching and then composite resin *** 2000 thermal cycles,teeth were immersed in 2%methylene blue for 24 hours,then the microleakage of interface of restorations was observed under stereomicroscope. Results:Unbleached group displayed the least amount of microleakage,while the group of filling immediately after bleaching showed the greatest amount of microleakage,delay filling group and sodium ascorbate-treated group behaved similarly as the group of filling immediately after bleaching,having great amount of microleakage,showing no significant difference(P>0.05);the microleakage of sodium ascorbate combined with Tween-treated group and catalase-treated group decreased significantly(P< 0.05)compared to the group of filling immediately after bleaching. Conclusion:The microleakage increased significantly after external bleaching with 10%carbamide peroxide,then decreased treated with sodium ascorbate combined with Tween or catalase,and catalase displayed more efficiently,but delay filling and treated with sodium ascorbate perform badly.

关键词： external tooth bleaching carbamide peroxide microleakage composite resin antioxidant

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Journal of Materials Science & Technology 2003年第3期19卷 249-252页

作者： JingriREN KyohanKim SeockSamKim DepartmentofMechanicalEngineering YanbianUniversityYanji133002China DepartmentofDentalBiomaterials KyungpookNationalUniversityTaegu701-702Korea DepartmentofMechanicalEngineering KyungpookNationalUniversityTaegu701-702Korea

The fracture and tribological evaluation of dental composite resin containing pre-polymerized particle fillers were investigated. composite resins, e.g. metafil, silux plus, heliomolar and palfique estelite were selected as specimens in order to evaluate the effects of pre-polymerized particle filler on the fracture and wear characteristics of composite resins. In the wear tests, a ball-on-flat wear test method was used. The friction coefficient of metafil was quite high. The wear resistance of silux plus and palfique estelite was better than that of metafil and heliomolar under the same experimental condition. The main wear mechanism of composite resins containing pre-polymerized particle fillers was an abrasive wear by brittle fracture of pre-polymerized particles and by debonding of fillers and matrix.

关键词： composite resin Tribology Dental materials Pre-polymerization Wear mechanism

The application of nanotechnology in the improvement of dental composite resins

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Engineering Sciences 2012年第4期10卷 83-89页

作者： Xia Yang Xie Haifeng Zhang Feimin Gu Ning Institute of Stomatology Nanjing Medical University Nanjing 210029 China Suzhou Institute of Southeast University Suzhou Jiangsu 215124 China)

In this paper, nanotechnology for the improvement of dental composite resins has been reviewed in the background of the existing shortcomings, focusing on the improvement for polymerization shrinkage, anti-bacterial properties and mechanical properties of composite resins. The results show that the use of nanotechnology and nano materials can be an effective method to improve the performance of dental composite resins in a various ways. At last, the paper also discusses the perspective about the dental composite resins.

关键词： nanotechnology composite resin antibacterial polymerization shrinkage mechanical properties

Effect of Different Bleaching Applications on the Surface Properties and Staining Susceptibility of Dental composites

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Journal of Wuhan University of Technology(Materials Science) 2016年第3期31卷 677-683页

作者： Pinlar Gul Osman Tolga Harorli Nilgün Ak Mustafa Gündogdu Department of Restorative Dentistry Faculty of DentistryAtaturk University25240-ErzurumTurkey Department of Restorative Dentistry Faculty of DentistryAkdeniz University07058-AntalyaTurkey Department of Prosthetic Dentistry Faculty of Dentistry Ataturk University25240-ErzurumTurkey

The aim of this study was to investigate the effects of two bleaching systems on micro hardness, surface roughness and color stability of two novel dental composites. Ormocer based restorative Admira and nano-filled composite Clearfil Majesty Esthetic were bleached with 10% carbamide peroxide （Opalescence PF） or 35% hydrogen peroxide （Beyond Max 5） and subsequently immersed in four different staining solutions （coffee, tea, red wine, and cola）. Distilled water was used as a control. Color measurements were performed with a spectrophotometer. Vickers micro hardness and roughness data were analyzed with two- way analysis of variance for repeated measures. The analysis of variance was used to compare the color change values. Duncan＇s multiple comparison test was applied to compare the results （a = 5%）. AE~＂ values over 3.3 were considered clinically unacceptable. Micro hardness and surface roughness values of the tested composites were decreased significantly after bleaching applications. Red wine and tea storage caused perceptible discolorations in the composite resin materials after 30 days of 3-hour immersion. Home or office bleaching applications can affect the surface properties of resin composites and accelerate the staining process.

关键词： composite resin bleaching surface roughness micro hardness discoloration

Clinical Application of TESCERA^TM ATL Indirect composite Inlay and Onlay

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Journal of Nanjing Medical University 2003年第6期17卷 313-315页

作者：陈亚明南京医科大学口腔医学院修复科

Objective: A new indirect composite restorative system with water combingpressure, light, and heat was introduced for the fabrication of inlays and onlays. Methods: Fifteendefected teeth were selected for composite resin inlay and onlay fabrication with Tescera ATL unitequipment. The clinical trial was carried out for 3 months. Results: After 3 months test, 7parameters were checked, 15 Tescera inlays and onlays were demonstrated that exceptional esthetics,all 7 parameters were good and the patients were very satisfied. Conclusion: inlays , which weremade with Tescera ATL restorative system, are esthetics; physical properties of materials areimproved highly, and have a long-lasting durability. This restorative system is worthy to be usedand further studied in dental practice.

关键词： composite resin inlay

Fracture resistance of posterior teeth restored with modern restorative materials

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The Journal of Biomedical Research 2011年第6期25卷 418-424页

作者： Ibrahim M. Hamouda Salah H. Shehata Department of Biomaterials Mansoura University Al-Gomhoria St Mansoura 35516 Egypt Department of Conservative Dentistry Mansoura University Al-Gomhoria St Mansoura 35516 Egypt

We studied the fracture resistance of maxillary premolars restored with recent restorative materials. Fifty maxillary premolars were divided into five groups： Group 1 were unprepared teeth; Group 2 were teeth prepared without restoration; Group 3 were teeth restored with tetric ceram HB; Group 4 were teeth restored with InTen S; and Group 5 were teeth restored with Admira. The samples were tested using a universal testing machine. Peak loads at fracture were recorded. The teeth restored with Admira had the highest fracture resistance followed by those restored with InTen-S and tetric ceram HB. Prepared, unrestored teeth were the weakest group. There was a significant difference between the fracture resistance of intact teeth and the prepared, unrestored teeth. There was also a significant difference among the tested restorative materials. Teeth restored with Admira showed no significant difference when compared with the unprepared teeth. It was concluded that the teeth restored with Admira exhibited the highest fracture resistance.

关键词： fracture resistance composite resin adhesives mesio-occlusal-distal (MOD) cavities

Comparative Mechanical Properties of Bulk-Fill resins

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Open Journal of composite Materials 2014年第2期4卷 117-121页

作者： Atabek Didem Yalcin Gozde Oztas Nurhan Department of Pedodontics Faculty of DentistryGazi UniversityAnkaraTurkey

Aim: The aim of this study was to compare the flexural and compressive strengths of a new sonicactivated bulk-fill system (Sonicfill) with other bulk-fill resins and a universal posterior composite resin. Materials and Methods: A low-stress flowable base resin material (SDR), a bulk-fill composite resin (Tetric Evo Ceram), a universal posterior composite (GC G-aenial), and the Sonicfill system were compared. The specimens were prepared for each group following ISO Standard 4049 (flexural strength) and ADA 27 specifications (compressive strength). One-way variance analysis and Kruskal-Wallis tests were used to determine the statistical differences among groups (p 0.05). Results: The Sonicfill system presented significantly higher compressive strength than other groups (p 0.001). Conclusion: Due to the ability to place restorations with single increment and ease of use, the Sonicfill system can be an alternative for posterior restorations.

关键词： Bulk-Fill composite resin Dental Materials

Effect of Universal Primers on the Tensile Bond Strength between Zirconia and resin composites

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材料科学与工程（中英文B版） 2021年第1期11卷 1-7页

作者： Akinori Ohno Mizuki Nagata Hiroaki Kobayashi Hiroaki Yamaguchi Katsura Ohashi Kaori Aoki Tomotaro Nihei Katsuhiko Kimoto Department of Oral Interdisciplinary Medicine Prosthodontics&Oral Implantology Graduate School of DentistryKanagawa Dental University82 Inaoka-choYokosukaKanagawa 238-8580Japan Division of Clinical Biomaterials Department of Oral ScienceGraduate School of DentistryKanagawa Dental University82 Inaoka-choYokosukaKanagawa 238-8580Japan

This study aimed to evaluate the effects of universal primers on the tensile bond strength between zirconia and resin *** specimens were divided into five groups based on the surface treatment with the following primers:MP(Monobond Plus),SU(ScotchBond Universal),AZ(AZ Primer),BM(Beauty bond Multi),and BL(Bondmer Lightless).After priming,stainless steel rods were bonded to the zirconia specimens with composite *** tensile bond strength test was performed:stored at room temperature for 1 day;stored in distilled water at 37°C for 7 days;and underwent thermal *** BL group demonstrated a significantly higher tensile bond strength than other groups when stored at room temperature for 1 day(p<0.05).The primer that acted via chemical polymerization appeared to be most effective in improving the bond strength between the two materials in this study.

关键词： Universal primer zirconia composite resin bond strength.