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Author : Evan E. Roberts
Publisher :
ISBN 13 :
Total Pages : 17 pages
Book Rating : 4.:/5 (12 download)
Download or read book Fracture Resistance of Titanium-based Lithium Disilicate and Zirconia Abutments written by Evan E. Roberts and published by . This book was released on 2017 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jamie Foong
Publisher : LAP Lambert Academic Publishing
ISBN 13 : 9783659617287
Total Pages : 120 pages
Book Rating : 4.6/5 (172 download)
Download or read book Fracture Resistance of Titanium and Zirconia Abutments - A Lab Study written by Jamie Foong and published by LAP Lambert Academic Publishing. This book was released on 2014-10-21 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: Statement of Problem. There is little conclusive evidence comparing the fracture resistance of internal connection titanium and zirconia implant abutments and the purpose of this study was to determine the fracture resistance of internal connection titanium and zirconia implant abutments. Material and Methods. Twenty-two specimens simulating implant-supported anterior single crowns were randomly divided into two equal test groups. Abutments were attached to dental implants mounted in acrylic resin and CAD/CAM crowns constructed. Chewing function was simulated using cyclic loading in a stepped fatigue loading protocol until failure. Failed specimens were then analyzed using SEM and fractographic analysis. Results. The titanium abutment group fractured at a mean SD load of 270 56.7 N and a mean SD of 81,935 27,929 cycles. The zirconia abutment group fractured at a mean SD load of 140 24.6 N and a mean SD of 26,296 9,200 cycles (p
Author : Jamie K. W. Foong
Publisher :
ISBN 13 :
Total Pages : 140 pages
Book Rating : 4.:/5 (816 download)
Download or read book Fracture Resistance of Titanium and Zirconia Abutments written by Jamie K. W. Foong and published by . This book was released on 2011 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Adham Fawzy Elsayed
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (15 download)
Download or read book Comparison Between the Fracture Strength and Failure Mode of Lithium Disilicate, Zirconia and Titanium Implant Abutments written by Adham Fawzy Elsayed and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Carlos Alberto Hernandez Terrazas
Publisher :
ISBN 13 :
Total Pages : 59 pages
Book Rating : 4.:/5 (874 download)
Download or read book Fracture Resistance of Pressable Ceramic Fused to Metal Custom Implant Abutment written by Carlos Alberto Hernandez Terrazas and published by . This book was released on 2013 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt: Objectives: The purpose of this study was to determine the feasibility of fabricating a pressable metal ceramic custom implant abutment (Pr) with a full porcelain coverage design, and to compare fracture resistance to its commercially available zirconia counterpart (Zr). Methods: Two groups of implant abutment specimens were fabricated. The experimental group consisted of custom pressed-ceramic (Pr) abutment (n=10), and the control group consisted of CAD/CAM-designed zirconia-based ceramic (Zr) abutment (n=10). For the experimental group, a custom metal abutment was cast using a compatible metal alloy (Lodestar); this was followed by injection molding with leucite reinforced pressable ceramic (IPS InLine Press-over-Metal) around the metal column of the custom implant abutment. For the control group, a specimen was fabricated from CAD/CAM-designed zirconia abutment (Procera Zirconia). Following scanning, all-ceramic crowns with the average dimensions of a human central incisor were fabricated for the experimental and control abutments using lithium disilicate pressable ceramic (IPS e. max Press). Each crown was cemented to the implant abutments with a resin luting agent (Multilink Automix). Samples were subjected to Thermocycling (2000 cycles). Crown-abutment test specimens were fixed to titanium implant analogs and placed in a test stand at 30 degrees from the vertical axis of the specimens in a computer-controlled universal testing device for cyclic loading. After 500,000 cycles samples were statically loaded to failure for further analysis. The independent t test was used to detect if the mean fracture load values between the 2 groups differ significantly (alpha=. 05). Results: No samples failed during thermocycling or cyclic loading. The mean fracture load of the experimental group was 1695N (SD=253) during static loading. The control had a mean fracture load of 1277N (SD=242). The mean fracture load of the experimental group was significantly higher than that of the control group; p= 0. 0015 (℗æPr>℗æZr). Conclusions: Within the limitations of this in vitro study, it can be concluded that a fully veneered pressed ceramic fused to metal custom implant abutment can be fabricated and had a higher mean fracture resistance than its commercially available zirconia counterpart over a Nobel Biocare wide implant platform.
Author : Shreedevi Thulasidas
Publisher :
ISBN 13 :
Total Pages : 71 pages
Book Rating : 4.:/5 (881 download)
Download or read book Influence of Implant Angulation on the Fracture Resistance of Zirconia Abutments written by Shreedevi Thulasidas and published by . This book was released on 2013 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt: Zirconia-based implant abutments are widely used in prosthetic dentistry. Custom made abutments are utilized to correct for non-ideal implant positions and can successfully accommodate the morphologic requirements of the overlying crown. It was hypothesized that there will be difference in fracture strength and fracture mode of artificially aged zirconia implant abutments supported by implants at varying angulation, when load is applied to failure on overlying zirconia crowns. The implant-abutment-crown assemblies were subjected to steam autoclaving to induce some degree of phase transformation from tetragonal to weaker monoclinic form and to thermo-cycling to artificially age the samples. The effects of loading or occlusal forces applied to a model of implant-abutment-crown assembly with varying geometry of implant alignment was investigated in this study with customized zirconia implant abutments with internally hexed implant and overlying zirconia crowns loaded to fracture. Construct design and loading angulations were selected to simulate mouth conditions as closely as possible. Results showed that fracture strength of zirconia abutments was affected by the variation in the angulation of the implant. Aging did not seem to play a role in the fracture strength.
Author :
Publisher :
ISBN 13 :
Total Pages : 33 pages
Book Rating : 4.:/5 (245 download)
Download or read book Fracture Resistance of Pressable Ceramic Fused to Metal Custom Implant Abutment written by and published by . This book was released on 2008 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this study was to investigate the efficacy of fabricating pressable ceramic fused to metal custom implant abutments, and to evaluate the fracture resistance of these abutments. Two groups of 10 samples each were tested. Replicated wax patterns were cast to Goldadapt ® abutments using Lodestar ® for the experimental group. IPS e.max ® press was injected around the metal column of the metal custom implant abutment. Each of these was scanned and 10 Procera ® Zirconia abutments were fabricated by Nobel Biocare for the control group. IPS e.max ® press crowns of an average dimension of the central incisor were fabricated for each experimental and control abutments (total 20 crowns). All crowns were cemented to these custom implant abutments using resin luting agent and the respective primer. The crown-abutment test specimens were fixed to titanium implant analogues and placed in a test stand at 30° angle in a Instron universal testing machine. There were a statistically significant difference in fracture load to failure between the experimental group and control group (t18=2.131, P
Author : Maria Protopapadaki
Publisher :
ISBN 13 :
Total Pages : 74 pages
Book Rating : 4.:/5 (644 download)
Download or read book Fracture Resistance of Pressable Ceramic Fused to Metal Custom Implant Abutment written by Maria Protopapadaki and published by . This book was released on 2010 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: BoldStatement of problem:/bold The restoration of single implant & ndash;supported crowns presents an aesthetically prosthetic challenge. The commercially available choices for abutment selection are limited and present either questionable aesthetics or questionable strength. There is need for development of an alternative technique for an aesthetic custom implant abutment that would be able to withstand high occlusal and functional forces.^The predictable nature of the hot pressing technique has several applications but no study has evaluated its application for the fabrication of custom implant abutments.Purpose of this study: To evaluate the fracture resistance of an experimentally designed pressable ceramic fused to metal custom abutment for Nobel Biocare internal connection narrow platform (NP) implants and compare it with the fracture resistance of duplicated Procera zirconia abutments.Materials and Methods: Two groups of 10 samples each were tested. The experimental group consisted of all & ndash;ceramic crowns cemented on pressable ceramic fused to metal custom narrow & ndash;platform implant abutments. The control group consisted of all-ceramic crowns cemented on duplicate Procera zirconia abutments.^The experimental abutments were fabricated on fixture level narrow-platform abutments (GoldAdapt, Nobel Biocare), cast with ceramic alloy (Lodestar, Ivoclar Vivadent) according to sample design dimensions. InLine PoM (Press Over Metal ceramic, Ivoclar Vivadent) ceramic was pressed over the metal according to design dimensions. Each pressable ceramic fused to metal abutment was individually scanned with Procera Picolo scanner and 10 duplicate zirconia abutments were fabricated by Nobel Biocare for the control group. The crowns had standard predetermined dimensions of an average lateral incisor (B & ndash;L width = 7mm, M & ndash;D width = 7mm, I & ndash;C length = 10mm) according to Diamond & rsquos anatomy, and were pressed with IPS e.max Press. A total of 20 all & ndash;ceramic crowns were prepared individually for each abutment. A dual & ndash;polymerizing resin luting agent (Multilink Automix, Ivoclar Vivadent) was used to bond the all & ndash;ceramic crowns to the abutments.^The samples were mounted on a device, thermocycled and then subjected to cyclic loading using the Universal Testing Machine (UTM, MTS). All specimens were loaded off axis 30° to the lingual surface. The samples that did not fail were statically loaded to failure. An independent t & ndash;test (one & ndash;sided) was used to determine if the mean values of the fracture load differed significantly between the 2 groups. A significance level of 0.05 was used.Results: No sample failed during cyclic loading. During static loading, the mean load to failure for the experimental group was 525.89 N (SD = 143.547 N) and for the control group it was 413.70 N (SD = 35.515 N). The results indicate that the fracture resistance of the experimental pressable ceramic fused to metal custom abutment is significantly higher than that of the zirconia abutment for Nobel Biocare internal connection narrow platform (NP) implant (t8=2.283, p=0.0245).^Failure was initiated at the screw and internal connection level of the complex analog & ndash;screw & ndash;internal connection & ndash;abutment & ndash;crown for both the experimental and control groups for Nobel Biocare internal connection narrow platform (NP) implants.Conclusions: Within the limitations of this study, it can be concluded that the experimental pressable ceramic fused to metal abutment presents a statistically significantly higher fracture resistance than the zirconia abutment for Nobel Biocare internal connection narrow platform (NP) implants.Clinical application: The development of a pressable ceramic fused to metal custom implant abutment will provide an alternative aesthetic solution in patients with heavy occlusal and functional load conditions.
Author : Abdul Aziz Al-Sahhaf
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (971 download)
Download or read book Long-term Stability and Resistance to Fracture written by Abdul Aziz Al-Sahhaf and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Zusammenfassung: AbstractObjectiveTo investigate the survival rate, fracture strength, bending moments, loading to fracture and fracture modes of different designs of zirconia abutments after dynamic loading with thermocycling, and compare these values to titanium abutments.MethodsA total of 80 abutment samples were divided into 5 test groups of 16 samples in each group. The study included the following groups, Group 1: CAD/CAM produced all-zirconia abutments, Group 2: titanium abutments, Group 3 zirconia-abutments adhesively luted to a titanium base, Group 4: prefabricated all-zirconia abutments and Group 5: zirconia-abutments glass soldered to a titanium base. Half the number of samples in each group was exposed to 1.2 million loading cycles (5-years simulation) in the chewing simulator. The samples that survived the artificial aging were later tested for fracture strength in a universal testing machine. The remaining 8 samples of the group were directly tested for fracture strength.ResultsAll samples exposed to the 5-years artificial aging survived except of six samples in one group (Group 1). The surviving samples were later fracture tested in the universal testing machine. The bending moments (Ncm) values were as follow: Exposed groups: Group 1: 94.5 Ncm; Group 2: 599.2 Ncm; Group 3: 477.5 Ncm; Group 4: 314.4 Ncm; Group 5: 509.4 Ncm. Non-exposed groups: Group 1: 269.3 Ncm; Group 2: 474.2 Ncm; Group 3: 377.6 Ncm; Group 4: 265.4 Ncm; Group 5: 372.4 Ncm. Except in Group 1, the values were higher in the exposed groups, although, statistically there was no difference (p>0.05). The one-piece ZrO2-abutment group (Group 1 and Group 4) exhibited lower values, while the two-piece ZrO2-abutment groups (Group 3 and Group 5) showed similar values and fracture modes like the titanium abutment group. The titanium abutment group showed the highest values of bending moments among all groups.ConclusionThe implant-abutment connection area appeared to influence the bending moment value and the fracture mode of the tested abutment groups, and it was found to be the weakest part of an internal connection one-piece zirconia abutment. The titanium base in the two-piece zirconia abutment worked as a substitute for the weakest part of the abutment. Therefore, the titanium base can reinforce the fracture strength of a zirconia abutment
Author : In-Sung Yeo
Publisher : MDPI
ISBN 13 : 3036504168
Total Pages : 196 pages
Book Rating : 4.0/5 (365 download)
Download or read book Dental Implant Materials 2019 written by In-Sung Yeo and published by MDPI. This book was released on 2021-03-17 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dental implant materials are advancing in the fusion of various scientific fields. Surface modification technologies for implants have been applied to titanium at the micro-level for about four decades. Now, implant surfaces are being topographically and chemically modified at both the micro- and nano-level. The modification techniques are altering other metals and ceramics, making these materials more biocompatible. Materials for abutments in dental implant systems appear to depend on implant–abutment connection structures. Biomechanical factors, such as friction and preload, influence the development of the abutment materials. Additionally, the surfaces of the abutment materials are important in the soft-tissue attachment, which is being actively investigated. As dental implants have to be functional in human bodies for a long time, numerous materials are being clinically tested as implant-supported restorations. The Special Issue, “Dental Implant Materials 2019”, introduces the creative works of scientists on the current advancements in the field of materials for implant dentistry.
Author : William John Curran
Publisher :
ISBN 13 :
Total Pages : 2 pages
Book Rating : 4.:/5 (82 download)
Download or read book The Legal Responsibility of a State University Medical Center written by William John Curran and published by . This book was released on 1969 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Steven J. Sadowsky
Publisher : John Wiley & Sons
ISBN 13 : 1119080037
Total Pages : 400 pages
Book Rating : 4.1/5 (19 download)
Download or read book Evidence-based Implant Treatment Planning and Clinical Protocols written by Steven J. Sadowsky and published by John Wiley & Sons. This book was released on 2017-01-17 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Evidence-based Implant Treatment Planning and Clinical Protocols provides a systematic approach to making treatment decisions and performing restorative procedures. Offers a clinically relevant resource grounded in the latest research Applies an evidence-based approach to all aspects of implant dentistry, including maxillofacial prosthodontics, from planning to surgery and restoration Describes procedures in detail with accompanying images Covers all stages of treatment, from planning to execution Includes access to a companion website with video clips demonstrating procedures and the figures from the book in PowerPoint
Author : Jack Ferracane
Publisher : Elsevier Health Sciences
ISBN 13 : 0323848974
Total Pages : 209 pages
Book Rating : 4.3/5 (238 download)
Download or read book Dental Biomaterials, An Issue of Dental Clinics of North America, E-Book written by Jack Ferracane and published by Elsevier Health Sciences. This book was released on 2022-10-12 with total page 209 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this issue of Dental Clinics, guest editors Drs. Jack L. Ferracane, Luiz E. Bertassoni, and Carmem S. Pfeifer bring their considerable expertise to the topic of Dental Biomaterials. Dental biomaterials have received recent attention in terms of exhibiting excellent performance, as well as increased migration and proliferation of cells involved in the osseointegration of implants. This issue offers up-to-date, expert coverage of adhesives, cements, composites, ceramics, scaffold materials, and implants, as well as light curing and safety of dental materials. Contains 11 practice-oriented topics including dental adhesives: surface modifications of tooth structure for stable bonding; resin-based composites: materials for direct and indirect applications; new technologies for restorative dentistry; advances in ceramics for dental applications; cements and protocols for bonded dental ceramics; and more. Provides in-depth clinical reviews on dental biomaterials, offering actionable insights for clinical practice. Presents the latest information on this timely, focused topic under the leadership of experienced editors in the field. Authors synthesize and distill the latest research and practice guidelines to create clinically significant, topic-based reviews.
Author : Hamid R. Shafie
Publisher : John Wiley & Sons
ISBN 13 : 1118928539
Total Pages : 200 pages
Book Rating : 4.1/5 (189 download)
Download or read book Clinical and Laboratory Manual of Dental Implant Abutments written by Hamid R. Shafie and published by John Wiley & Sons. This book was released on 2014-07-09 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: To fulfill the vision for his latest book, Dr. Hamid Shafie compiled technical information from a vast variety of sources, including implant manufacturers and designers, master dental technicians, implant researchers, and expert clinicians leading the field of implant dentistry worldwide. He and his expert contributors meticulously assembled each chapter to include only the most relevant and up-to-date content and procedures in a concise and simple format. Dr. Shafie follows the same easy-to-read, easy-to-understand format as his best-selling textbook Clinical and Laboratory Manual of Implant Overdentures.Starting with the material science behind implant abutments, the text then describes all of the relevant abutment solutions, providing a step-by-step guide to design and manufacturing of the CAD/CAM abutments and explaining how to adjust prefabricated abutments and one-piece titanium and zirconia implants. In addition to offering the ultimate procedural guide for clinical and laboratory preparation of dental implant abutments, this textbook is filled with useful tips on clinical practice management such as sterilization, instrumentation and trouble-shooting related to implant abutments. Clinical and Laboratory Manual of Dental Implant Abutmentsis the only text devoted exclusively to an in-depth look at implant abutments. Every dental implant clinician, technician, student, and implant industry insider needs this vital work in their library.
Author : Pitta Joao
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (116 download)
Download or read book Stability of Zirconia Mesio-abutments Bonded to Titanium Bases Restored with Monolithic Crowns written by Pitta Joao and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Background: Recently due to esthetic concerns, zirconia abutments are becoming very popular. However, they were shown to be much moreprone to fracture than titanium abutments. The development of the titanium bonding-bases allowed a combination of a metallicconnection to the implant with different all-ceramic suprastructures, including monolithic reconstructions. Yet, it is still not clear howstable these reconstructions are.Aim: To assess the bending moments and fracture patterns of zirconia mesio-abutments on titanium bonding-bases restored with differentall-ceramic monolithic crowns and compare them with titanium abutments restored with all-ceramic crowns.Materials and Methods: 48 implants with an internal connection (Conelog, Camlog) were restored with 4 different CAD-CAM abutment-crown combinations(n=12). 36 customized zirconia mesio-abutments were bonded to titanium bonding-bases and divided into 3 groups according to thedifferent crown material: (T1) monolithic lithium disilicate (e-max CAD, Ivoclar); (T2) monolithic zirconia (Lava Plus, 3M ESPE) and(T3) monolithic hybrid ceramic (Enamic, Vita) Titanium customized abutments restored with monolithic lithium disilicate (e-max cad,Ivoclar) crowns served as control group (C). All crowns were cemented using a resin-cement (Panavia 21, Kuraray). The sampleswere embedded in acrylic holders. After aging (1'200'000 cycles, 49 N, 1.67 Hz, 5u00b0C-50C, 120s), static load was applied until failure(ISO-Norm 14801). Bending moments were calculated for comparison of the groups. Values were statistically compared with one-wayANOVA followed by Tukey post hoc test (p.05). Failure mode was analyzed descriptively.Results: The means of the bending moments were 356.4 u00b1 20.8 Ncm (T1), 385.5 u00b1 21.2 Ncm (T2), 357.7 u00b1 26.3 Ncm (T3) and 358.8 u00b1 25.3Ncm (C). Group T2 exhibited significantly higher mean bending moments than the other groups (p 0.05). No differences were foundbetween zirconia mesio-abutments on titanium bonding-base abutments and customized titanium abutments (p > 0.05). No failureswere registered during the aging. In all the groups failures occurred due to fracture of the abutment in the internal connection.Conclusions and clinical implications: The use of zirconia mesio-abutments bonded to titanium bonding-bases appeared to be a stable combination when compared to thecustomized titanium abutments which still represent the gold-standard. Regarding the crown material, monolithic zirconia revealed tobe mechanically superior than the other crown materials.
Author : Abdelsalam Elaskary
Publisher : John Wiley & Sons
ISBN 13 : 0470376333
Total Pages : 354 pages
Book Rating : 4.4/5 (73 download)
Download or read book Fundamentals of Esthetic Implant Dentistry written by Abdelsalam Elaskary and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: Esthetic dentistry and implant dentistry continue to grow in patient demand and professional popularity. More now than ever, clinicians are faced with the need to combine form with function, art with science. The considerable scientific and technical leaps that have been made in this field mean that this goal is now more achievable, and Fundamentals of Esthetic Implant Dentistry seeks to share these advances with practitioners and students alike.
Author : Andreas Öchsner
Publisher : Springer
ISBN 13 : 3319194704
Total Pages : 217 pages
Book Rating : 4.3/5 (191 download)
Download or read book Applications of Computational Tools in Biosciences and Medical Engineering written by Andreas Öchsner and published by Springer. This book was released on 2015-06-09 with total page 217 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph presents the latest developments and applications of computational tools related to the biosciences and medical engineering. Computational tools such as the finite element methods, computer-aided design and optimization as well as visualization techniques such as computed axial tomography open completely new research fields with a closer joining of the engineering and bio/medical area. Nevertheless, there are still hurdles since both directions are based on quite different ways of education. Often even the “language” is sometimes different from discipline to discipline. This monograph reports the results of different multi-disciplinary research projects, for example, from the areas of scaffolds and synthetic bones, implants and medical devices and medical materials. It is also shown that the application of computational methods often necessitates mathematical and experimental methods.
