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Influence Of Implant Angulation On The Fracture Resistance Of Zirconia Abutments
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Book Synopsis Influence of Implant Angulation on the Fracture Resistance of Zirconia Abutments by : Shreedevi Thulasidas
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.
Book Synopsis The Effect of Implant Angulation on the Fracture Resistance of Procera Zirconium Abutments by : Zinaida Kaleinikova
Download or read book The Effect of Implant Angulation on the Fracture Resistance of Procera Zirconium Abutments written by Zinaida Kaleinikova and published by . This book was released on 2006 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Introduction: An all-ceramic abutment system offers superior esthetics, translucency, biocompatibility and strength in comparison to metal abutments. Naturally, with all the variables presented by human beings, there is a risk that the final location and angulation of the implant would be not as exact as planned. The restorative dentist has an option to use prefabricated ceramic abutments and customize them as necessary to achieve highly esthetic results. However, there is not much information on how different abutment angulations affect strength. The new Procera system (Nobel Biocare) offers customized abutments in wide variety of clinical situations, which would be especially convenient in the restorative esthetic cases of angled implants. Purpose: This study examined the effects of implant angulation on the strength of ceramic abutment designs. Materials and methods: Twenty custom made Procera (Nobel Biocare) zirconia abutments fabricated with CAD/CAM technique were used in this study. The typical design of an abutment for a cemented central incisor crown was used. The strength of zirconium abutments was measured using four different axial alignments of implants: Group A, axis of implant goes through the cingulum area, Group B, through the incisal edge, Group C, 150 labial inclination and Group D, the anterior angled limit allowed by the abutment screw height (300). Using an MTS hydraulic machine, load was applied to a consistent palatal/incisal reference point on each abutment. Measurements of fracture load were collected and analyzed using ANOVA. Where ANOVA detected a difference between tested variable levels, REGWQ test was performed and determined which variable level was more significant. Results: Group A withstand significantly (p=0.005) higher fracture load than Group B, Group C and Group D. Mean peak load values were 518.7 N, 269.4 N, 232.0 N and 227.4 N, respectively. Conclusion: Comparison of fracture load measurements of different abutment angulations revealed the most fracture resistant abutment design. Results from this study will help to create guidelines for prosthodontists in making decisions in various clinical situations and improve pre-operative treatment planning, particularly as they relate to the Procera (Nobel Biocare) all-ceramic system.
Book Synopsis Fracture Resistance of Titanium and Zirconia Abutments - A Lab Study by : Jamie Foong
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
Book Synopsis An Update of Dental Implantology and Biomaterial by : Mazen Ahmad Almasri
Download or read book An Update of Dental Implantology and Biomaterial written by Mazen Ahmad Almasri and published by BoD – Books on Demand. This book was released on 2019-01-30 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of An Update in Dental Implantology and Biomaterial is to continue the challenge of reconstruction and implantology into another volume with unique updates. As a surgeon who is usually asked to accomplish the reconstructive skeleton of the rehabilitation plan, questions like "Doc, I am in a hurry, how fast can you finish the treatment?" are becoming very common in practice these days. This phenomenon goes hand in hand with people's current lifestyles. Another challenge is the inapplicable prosthetic plan due to the difficulty at the patient side or the surgical intervention side. The advancement in reconstruction is appreciated, but apparently it has not reached the limit of placing the factors of cost, time, and invasiveness into one location. I believe that cases should be treated and rehabilitated as soon as possible, with reasonable cost and feasible technicality, so that clients can focus on their daily lives. With this book I am honored to present a homogeneous gathering of literature on implantology, elaborated with up-to-date techniques of grafting, the improvement of anterior aesthetics, and answers to questions concerning postoperative implant complications and microbiota care.
Book Synopsis Long-term Stability and Resistance to Fracture by : Abdul Aziz Al-Sahhaf
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
Book Synopsis Fracture Resistance of Zirconia Oral Implants in Vitro: a Systematic Review and Meta-analysis by : Annalena Bethke
Download or read book Fracture Resistance of Zirconia Oral Implants in Vitro: a Systematic Review and Meta-analysis written by Annalena Bethke and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Various protocols are available to preclinically assess the fracture resistance of zirconia oral implants. The objective of the present review was to determine the impact of different treatments (dynamic loading, hydrothermal aging) and implant features (e.g., material, design or manufacturing) on the fracture resistance of zirconia implants. An electronic screening of two databases (MEDLINE/Pubmed, Embase) was performed. Investigations including > 5 screw-shaped implants providing information to calculate the bending moment at the time point of static loading to fracture were considered. Data was extracted and meta-analyses were conducted using multilevel mixed-effects generalized linear models (GLMs). The Šidák method was used to correct for multiple testing. The initial search resulted in 1864 articles, and finally 19 investigations loading 731 zirconia implants to fracture were analyzed. In general, fracture resistance was affected by the implant design (1-piece > 2-piece, p = 0.004), material (alumina-toughened zirconia/ATZ > yttria-stabilized tetragonal zirconia polycrystal/Y-TZP, p = 0.002) and abutment preparation (untouched > modified/grinded, p
Book Synopsis Fracture Resistance of Pressable Ceramic Fused to Metal Custom Implant Abutment by : Maria Protopapadaki
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.
Book Synopsis Fracture Resistance of Pressable Ceramic Fused to Metal Custom Implant Abutment by :
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
Book Synopsis Influence of Connector Area and Abutment Material on Fracture Strength of Implant-supported Cantilevered Zirconia and Metal Frameworks by :
Download or read book Influence of Connector Area and Abutment Material on Fracture Strength of Implant-supported Cantilevered Zirconia and Metal Frameworks written by and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this invitro study was to evaluate the fracture strength of implant-supported cantilevered zirconia and metal frameworks with different connector areas on zirconia and titanium abutments. A total of 60 cantilevered implant-supported three unit frameworks were fabricated and divided into three groups (TZ: titanium abutment-zirconia framework, ZZ: zirconia abutment-zirconia framework, and TCrCo: titanium abutment-metal framework). Samples from each group were divided into two subgroups (n=10) according to the size of the connector area; 9 mm2 and 15 mm2. All cantilevered frameworks were cemented and loaded in a universal testing machine until the framework was fractured or decemented. A two-way analysis of variance was used to analyze the fracture force and the relationship between connector dimension and abutment material. The results of fracture strength tests showed that mean fracture loads were approximately 188.73 N, 480.86 N, 234.41 N, 406.03 N, 936.55 N, and 924.36 N for TZ-9, TZ-15, ZZ-9, ZZ-15, TCrCo-9, and TCrCo-15, respectively. There was a statistically significant difference in fracture strength between TZ-9 and TZ-15, and between ZZ-9 and ZZ-15 (pu22640.05). In contrast, the difference in the fracture strength of TCrCo-9 and TCrCo-15 was not statistically significant. An increase in the cross-sectional area of the connector affected the fracture strength of the implant-supported cantilevered zirconia framework. There was no statistically significant relationship between the cross-sectional connector area dimensions and metal frameworks.
Book Synopsis Influence of Loading and Aging on the Fracture Strength of an Injection-molded Two-piece Zirconia Implant Restored with a Zirconia Abutment by : Ralf-Joachim Kohal
Download or read book Influence of Loading and Aging on the Fracture Strength of an Injection-molded Two-piece Zirconia Implant Restored with a Zirconia Abutment written by Ralf-Joachim Kohal and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fracture Resistance of Titanium and Zirconia Abutments by : Jamie K. W. Foong
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:
Book Synopsis Fracture Resistance of Pressable Ceramic Fused to Metal Custom Implant Abutment by : Carlos Alberto Hernandez Terrazas
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.
Book Synopsis Journal of Prosthodontics on Dental Implants by : Avinash Bidra
Download or read book Journal of Prosthodontics on Dental Implants written by Avinash Bidra and published by John Wiley & Sons. This book was released on 2015-09-28 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Journal of Prosthodontics has been the official publication of the American College of Prosthodontics for more than 20 years. In excess of 1,000 peer-reviewed articles on a wide variety of subjects are now in print, representing a treasure chest of history and valuable information on a myriad of topics of interest to the specialty of prosthodontics. Journal of Prosthodontics on Dental Implants is a “best of” compilation of the journal’s articles from a number of years, focusing exclusively on the multiple applications of osseointegrated implants: for the management of the partially edentulous patient, management of the completely edentulous patient, and management of patients with maxillofacial defects. Sections also relate to in-vitro studies and general considerations to round out the readership selections. Whether you’re a subscriber who’s looking for implant articles in one convenient collection or a clinician with a focus on implant dentistry looking to improve your knowledge base, Journal of Prosthodontics on Dental Implants is a must-have for your personal library.
Book Synopsis The Effect of Varying Abutment Dimensions on the Retention of Zirconia Restorations by : Bill Abbo Van Dam
Download or read book The Effect of Varying Abutment Dimensions on the Retention of Zirconia Restorations written by Bill Abbo Van Dam and published by . This book was released on 2006 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Influence of Zirconia Ceramic Abutment Preparation on the Fracture Strength of Single Implant Restorations After Chewing Simulation by : Miltiadis Mitsias
Download or read book Influence of Zirconia Ceramic Abutment Preparation on the Fracture Strength of Single Implant Restorations After Chewing Simulation written by Miltiadis Mitsias and published by . This book was released on 2011 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fracture Resistance of Titanium-based Lithium Disilicate and Zirconia Abutments by : Evan E. Roberts
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:
Book Synopsis Clinical and Laboratory Manual of Dental Implant Abutments by : Hamid R. Shafie
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.
