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Ghoveizi R, Baghaei M, Tavakolizadeh S, Tabatabaian F. Color match of ultra-translucency multilayer zirconia restorations with different designs and backgrounds. J Prosthodont 2024; 33:382-388. [PMID: 37155925 DOI: 10.1111/jopr.13700] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Accepted: 05/03/2023] [Indexed: 05/10/2023] Open
Abstract
PURPOSE The purpose of this in vitro study was to assess the color match of ultra-translucency multilayer zirconia restorations with different designs and backgrounds. MATERIALS AND METHODS Thirty ultra-translucency multilayer zirconia crown specimens were made in VITA classical shade B2 for a prepared maxillary central incisor. The specimens were divided into three groups based on the restoration design: veneered zirconia with a trestle design (VZT), veneered zirconia with a dentin core design (VZD), and full-contour zirconia (FCZ). In the groups VZT and VZD, the zirconia specimens were layered with a feldspathic veneering ceramic. The specimens were seated on five different backgrounds: shade B2 composite resin, shade B2 zirconia, copper-colored metal alloy, silver-colored metal alloy, and the prepared central incisor. CIELab values of the labial middle sections of the crown specimens were measured with a spectrophotometer. Color differences between the specimens and a shade B2 VITA classical tab (as a control) were calculated from the ΔE* ab formula and compared with an acceptability threshold (ΔE* ab = 3.7) to be clinically explicated. RESULTS Mean ΔE* ab values ranged between 1.17 and 8.48. The restoration design, the background type, and their interaction affected the ΔE* ab (p < 0.001). The mean ΔE* ab values for VZT with all backgrounds and for VZD with the silver-colored metal background were greater than the threshold (p < 0.001), whereas the mean ΔE* ab values for VZD with the other backgrounds and FCZ with all backgrounds were less than the threshold (p = 1). CONCLUSIONS Restoration design and background type affected the color match of ultra-translucency multilayer zirconia restorations. VZT restorations on all backgrounds and VZD restorations on a silver-colored metal background showed color mismatches. However, VZD restorations on the other backgrounds and FCZ restorations on all backgrounds demonstrated color matches.
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Affiliation(s)
- Rahab Ghoveizi
- Department of Prosthodontics, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Maryam Baghaei
- School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Sara Tavakolizadeh
- Department of Prosthodontics, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Farhad Tabatabaian
- Faculty of Dentistry, The University of British Columbia, Vancouver, British Columbia, Canada
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Afshar K, Falahchai M, Ansarilari H, Tajziehchi G. Effect of CAD-CAM Framework Design Fabricated from Sintered Cobalt-Chromium Alloy on Fracture Resistance of Metal-Ceramic Restorations. Int J Dent 2023; 2023:3788590. [PMID: 39139497 PMCID: PMC11321897 DOI: 10.1155/2023/3788590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 03/29/2023] [Accepted: 04/27/2023] [Indexed: 08/15/2024] Open
Abstract
Introduction Porcelain fracture is a common problem of metal-ceramic restorations (MCRs). One suggested strategy to prevent it is to modify the metal framework design; however, the available information regarding the effect of framework design on porcelain fracture is scarce. Objective This study aimed to assess the effect of computer-aided design and computer-aided manufacturing (CAD-CAM) framework design fabricated from sintered cobalt-chromium (Co-Cr) alloy on fracture resistance of MCRs. Materials and Methods Twenty premolar metal dies were fabricated for this in vitro study. Ten standard frameworks were designed with 0.5 mm thickness, and 10 customized frameworks were designed with 1 mm thickness at the lingual margin and 0.5 mm thickness in all other areas. All specimens were fabricated from sintered Co-Cr alloy (Ceramill Sintron) using soft metal milling technology. After porcelain application, the specimens underwent thermocycling and cyclic loading for 3,000 cycles between 5 and 55°C. The fracture resistance was measured by a universal testing machine. The failure mode was also determined. Data were statistically analyzed by independent t-test (α = 0.05). Results The mean fracture resistance of porcelain was 2,379 ± 531 N in the standard and 2,557 ± 448 N in the customized group. No significant difference was found in fracture resistance of the two groups (P > 0.05). All specimens in both groups showed mixed failure. Conclusion The fracture resistance of porcelain and the failure mode were not affected by the framework design of MCRs fabricated from sintered Co-Cr alloy (Ceramill Sintron).
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Affiliation(s)
- Kourosh Afshar
- Department of Prosthodontics, Islamic Azad University Dental Branch, Tehran, Iran
| | - Mehran Falahchai
- Dental Sciences Research Center, Department of Prosthodontics, School of Dentistry, Guilan University of Medical Sciences, Rasht, Iran
| | - Homeira Ansarilari
- Department of Prosthodontics, Islamic Azad University Dental Branch, Tehran, Iran
| | - Gelareh Tajziehchi
- Department of Restorative Dentistry, School of Dentistry, Guilan University of Medical Sciences, Rasht, Iran
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Takano R, Honda J, Kobayashi T, Kubochi K, Takata H, Komine F. Fracture strength of implant-supported hybrid abutment crowns in premolar region fabricated using different restorative CAD/CAM materials. Dent Mater J 2023; 42:187-192. [PMID: 36476684 DOI: 10.4012/dmj.2022-165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The present study investigated the fracture strength of hybrid abutment crowns (HACs) in the premolar region that were fabricated with different restorative computer-aided design/computer-aided manufacturing (CAD/CAM) materials. The abutment-implant structures were randomly assigned into four groups (n=11 per group): bi-layered zirconia restorations (BL), translucent zirconia (4Y-PSZ) restorations (TZ), lithium disilicate ceramic restorations (LD), and dispersed nanoparticle-filled composite resin restorations (CM). All restorations were adhesively bonded to the titanium abutments. After the restoration-abutment complex was tightened onto the implant, the fracture strength was measured. The TZ (2.06 kN) and LD (1.87 kN) groups had significantly higher median fracture strengths than the BL (1.12 kN) and CM (1.10 kN) groups. In terms of fracture resistance, the 4Y-PSZ and lithium disilicate ceramic monolithic restorations would be superior to bi-layered 3Y-TZP and composite resin monolithic restorations for HACs in the premolar region.
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Affiliation(s)
- Ryoki Takano
- Department of Fixed Prosthodontics, Nihon University School of Dentistry
| | - Junichi Honda
- Department of Fixed Prosthodontics, Nihon University School of Dentistry
| | - Tatsuro Kobayashi
- Department of Fixed Prosthodontics, Nihon University School of Dentistry
| | - Kei Kubochi
- Department of Fixed Prosthodontics, Nihon University School of Dentistry
| | - Hiroki Takata
- Department of Fixed Prosthodontics, Nihon University School of Dentistry
| | - Futoshi Komine
- Department of Fixed Prosthodontics, Nihon University School of Dentistry
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Mechanical Stability of Screw-Retained Monolithic and Bi-layer Posterior Hybrid Abutment Crowns after Thermomechanical Loading: An In Vitro Study. MATERIALS 2021; 14:ma14247539. [PMID: 34947134 PMCID: PMC8706390 DOI: 10.3390/ma14247539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Revised: 11/29/2021] [Accepted: 12/03/2021] [Indexed: 11/17/2022]
Abstract
To evaluate the failure-load and survival-rate of screw-retained monolithic and bi-layered crowns bonded to titanium-bases before and after mouth-motion fatigue, 72 titanium-implants (SICvantage-max, SIC-invent-AG) were restored with three groups (n = 24) of screw-retained CAD/CAM implant-supported-single-crowns (ISSC) bonded to titanium-bases: porcelain-fused-to-metal (PFM-control), porcelain-fused-to-zirconia (PFZ-test) and monolithic LDS (LDS-test). Half of the specimens (n = 12/group) were subjected to fatigue in a chewing-simulator (1.2 million cycles, 198 N, 1.67 Hz, thermocycling 5–55 °C). All samples were exposed to single-load-to-failure without (PFM0, PFZ0, LDS0) or with fatigue (PFM1, PFZ1, LDS1). Comparisons were statistically analyzed with t-tests and regression-models and corrected for multiple-testing using the Student–Neuman–Keuls method. All PFM and LDS crowns survived fatigue exposure, whereas 16.7% of PFZ showed chipping failures. The mean failure-loads (±SD) were: PFM0: 2633 ± 389 N, PFM1: 2349 ± 578 N, PFZ0: 2152 ± 572 N, PFZ1: 1686 ± 691 N, LDS0: 2981 ± 798 N, LDS1: 2722 ± 497 N. Fatigue did not influence load to failure of any group. PFZ ISSC showed significantly lower failure-loads than monolithic-LDS regardless of artificial aging (p < 0.05). PFM ISSC showed significantly higher failure loads after fatigue than PFZ (p = 0.032). All ISSC failed in a range above physiological chewing forces. Premature chipping fractures might occur in PFZ ISSC. Monolithic-LDS ISSC showed high reliability as an all-ceramic material for screw-retained posterior hybrid-abutment-crowns.
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Ueda K, Watanabe F, Katsuta Y, Seto M, Ueno D, Hiroyasu K, Suzuki S, Erdelt K, Güth JF. Marginal and internal fit of three-unit fixed dental prostheses fabricated from translucent multicolored zirconia: Framework versus complete contour design. J Prosthet Dent 2020; 125:340.e1-340.e6. [PMID: 33198991 DOI: 10.1016/j.prosdent.2020.08.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 08/19/2020] [Accepted: 08/20/2020] [Indexed: 01/01/2023]
Abstract
STATEMENT OF PROBLEM Translucent multicolored zirconia materials enable more esthetic complete contour zirconia fixed dental prostheses (FDPs) than conventional zirconia, which exhibits low translucency and high opacity and is monochromatic. However, how the marginal and internal fit of translucent multicolored zirconia FDPs compare with those of traditional frameworks that require veneering is unclear. PURPOSE The purpose of this in vitro study was to compare the marginal and internal fit of frameworks and complete contour 3-unit FDPs fabricated from translucent multicolored zirconia. MATERIAL AND METHODS Frameworks with a thickness of 0.5 mm and complete contour FDPs with a thickness of 0.8 to 1.5 mm were manufactured by using a workflow similar to one from a zirconia master model (mandibular left second premolar-mandibular left second molar). Two polyvinyl siloxane replicas were made for each specimen to measure the marginal and internal fit. Measurement locations were mesial, lingual, buccal, and distal for each abutment. In these locations, the marginal opening (MO), chamfer area (CA), axial wall (AW), and occlusal area (OC) were measured. The data were analyzed with 2-way ANOVA and the Bonferroni post hoc test (α=.05). RESULTS Frameworks showed significantly better mean ±standard deviation fit values than complete contour 3-unit FDPs at measurement areas MO (frameworks: 112 ±22 μm, complete contour FDPs: 144 ±37 μm) (P=.013), CA (frameworks: 89 ±12 μm, complete contour FDPs: 110 ±22 μm) (P=.006), and OC (frameworks: 182 ±36 μm, complete contour FDPs: 244 ±64 μm) (P=.008). At the measurement area AW (frameworks: 47 ±7 μm, complete contour FDPs: 50 ±9 μm of each location, no significant difference was observed between frameworks and complete contour FDPs (P=.361). CONCLUSIONS Design differences in 3-unit FDPs fabricated from translucent multicolored zirconia influenced the marginal and internal fit. Frameworks had smaller marginal fit than complete contour FDPs for translucent multicolored zirconia.
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Affiliation(s)
- Kazuhiko Ueda
- Associate Professor, Department of Crown and Bridge Prosthodontics, School of Life Dentistry at Niigata, The Nippon Dental University, Niigata, Japan.
| | - Fumihiko Watanabe
- Professor and Chairman, Department of Crown and Bridge Prosthodontics, School of Life Dentistry at Niigata, The Nippon Dental University, Niigata, Japan
| | - Yasuhiro Katsuta
- Assistant Professor, Department of Crown and Bridge Prosthodontics, School of Life Dentistry at Niigata, The Nippon Dental University, Niigata, Japan
| | - Munetsugu Seto
- Assistant Professor, Department of Crown and Bridge Prosthodontics, School of Life Dentistry at Niigata, The Nippon Dental University, Niigata, Japan
| | - Daisuke Ueno
- Visiting Senior Assistant Professor, Department of Crown and Bridge Prosthodontics, School of Life Dentistry at Niigata, The Nippon Dental University, Niigata, Japan
| | - Kazuhiko Hiroyasu
- Professor and Director, Oral Implant Care Unit, Niigata Hospital, The Nippon Dental University, Niigata, Japan
| | - Shohei Suzuki
- Assistant Professor, Department of Crown and Bridge Prosthodontics, School of Life Dentistry at Niigata, The Nippon Dental University, Niigata, Japan
| | - Kurt Erdelt
- Scientific Engineer, Department of Prosthetic Dentistry, University Hospital, LMU Munich, Munich, Germany
| | - Jan-Frederik Güth
- Professor, Department of Prosthetic Dentistry, University Hospital, LMU Munich, Munich, Germany
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Alsadon O, Wood D, Patrick D, Pollington S. Fatigue behavior and damage modes of high performance poly-ether-ketone-ketone PEKK bilayered crowns. J Mech Behav Biomed Mater 2020; 110:103957. [PMID: 32957248 DOI: 10.1016/j.jmbbm.2020.103957] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Revised: 06/23/2020] [Accepted: 06/24/2020] [Indexed: 11/16/2022]
Abstract
OBJECTIVES To evaluate and compare the fatigue behavior (fatigue limit and fatigue life) and damage modes of high-performance poly-ether-ketone-ketone (PEKK), zirconia and alloy bilayered crowns. MATERIALS AND METHODS A total of 110 crowns (n = 50 for fatigue limit and n = 60 for fatigue life) were fabricated and used in this study. Pekkton® ivory discs, yttrium stabilized zirconia blanks and NiCr casting alloy were used to produce the respective PEKK, zirconia and alloy copings for crown fabrication. The prepared crowns were veneered with composite resin and subjected to fatigue tests. The fatigue limit was evaluated using the staircase method and the fatigue life of the samples was evaluated by subjecting the crowns to a load lower than the fatigue limit of that particular group, and also with an intermediate load of 522 N. A graphical plot was generated from the shape parameter (β) and life parameter (α) values obtained through the Weibull analysis method. Kruskal-Wallis and Mann-Whitney tests were applied to determine the significance differences in the recorded fracture mode between the study groups. The damage modes of the samples were assessed using Burke's classification. RESULTS The recorded fatigue limits of the groups were 442.8 ± 42.1 N, 608.7 ± 7.6 N, and 790.4 ± 29.2 N for zirconia, NiCr and PEKK, respectively. A significant difference in the fatigue limit of the groups was observed (p < 0.05). PEKK samples demonstrated the highest survival cycles of 1,170,000 and the lowest survival cycles was observed with zirconia samples at 100,000 under 522 N loading. The fracture modes in PEKK samples were largely distributed between code 1 and 2 whereas the fracture modes in NiCr group was distributed between code 1 and 4 and YZ crowns exhibited more of code 5 fractures. The difference in fracture modes among the groups was statistically significant (p < 0.05). CONCLUSION The PEKK group demonstrated better results compared to zirconia and NiCr based crowns. The PEKK group demonstrated high fatigue limit and survived the highest fatigue life cycles among the tested groups.
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Affiliation(s)
- Omar Alsadon
- Dental Health Department, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia; Engineer Abdullah Bugshan Research Chair for Dental and Oral Rehabilitation, College of Dentistry, King Saud University, Riyadh, Saudi Arabia.
| | - Duncan Wood
- Academic Unit of Restorative Dentistry, The School of Clinical Dentistry, The University of Sheffield, Sheffield, UK
| | - David Patrick
- Academic Unit of Restorative Dentistry, The School of Clinical Dentistry, The University of Sheffield, Sheffield, UK
| | - Sarah Pollington
- Academic Unit of Restorative Dentistry, The School of Clinical Dentistry, The University of Sheffield, Sheffield, UK
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Effect of framework material on the color of implant-supported complete-arch fixed dental prostheses. J Prosthet Dent 2019; 122:69-75. [DOI: 10.1016/j.prosdent.2018.11.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2018] [Revised: 11/22/2018] [Accepted: 11/26/2018] [Indexed: 11/17/2022]
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Güngör MB, Nemli SK, Bal BT, Tamam E, Yılmaz H, Aydın C. Fracture resistance of monolithic and veneered all-ceramic four-unit posterior fixed dental prostheses after artificial aging. J Oral Sci 2019; 61:246-254. [PMID: 31006735 DOI: 10.2334/josnusd.18-0060] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
This study compared the fracture resistance of monolithic and veneered all-ceramic four-unit posterior fixed dental prostheses (FDPs) generated by computer-aided design/computer-aided manufacturing (CAD/CAM) after aging in a mastication simulator. Four-unit FDPs were designed from six different all-ceramic systems: 1) monolithic lithium disilicate (M-E), 2) monolithic zirconia (M-TZI), 3) veneered zirconia by conventional layering (V-L), 4) veneered zirconia by lithium disilicate pressing (V-P), 5) veneered zirconia by lithium disilicate fusing (CAD-F-E), and 6) veneered zirconia by feldspathic ceramic cementing (CAD-C-CB). The specimens were divided into control and aging groups (n = 10 per group). The aging process included both thermocycling and mechanical loading and was followed by fracture resistance testing. All specimens in the M-E, M-TZI, and V-L groups survived; however, all specimens in the V-P group were fractured during artificial aging. The highest fracture resistance values were observed in the M-TZI group. According to the fracture resistance test, connector fractures were the most frequent type of failure. M-TZI and M-E FDPs revealed no failures during aging and showed higher fracture resistance than the veneered groups. Among the veneered zirconia framework groups, V-L FDPs showed the highest success rate during aging, while the fracture resistance was similar among all the veneered zirconia groups.
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Affiliation(s)
- Merve B Güngör
- Department of Prosthodontics, Faculty of Dentistry, Gazi University
| | - Seçil K Nemli
- Department of Prosthodontics, Faculty of Dentistry, Gazi University
| | - Bilge T Bal
- Department of Prosthodontics, Faculty of Dentistry, Gazi University
| | - Evşen Tamam
- Department of Prosthodontics, Faculty of Dentistry, Gazi University
| | - Handan Yılmaz
- Department of Prosthodontics, Faculty of Dentistry, Gazi University
| | - Cemal Aydın
- Department of Prosthodontics, Faculty of Dentistry, Gazi University
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Kondo T, Komine F, Honda J, Takata H, Moriya Y. Effect of veneering materials on fracture loads of implant-supported zirconia molar fixed dental prostheses. J Prosthodont Res 2018; 63:140-144. [PMID: 30446411 DOI: 10.1016/j.jpor.2018.10.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Revised: 10/25/2018] [Accepted: 10/29/2018] [Indexed: 11/29/2022]
Abstract
PURPOSE To determine the effect of veneering material and framework design on fracture loads of implant-supported zirconia molar fixed dental prostheses (FDPs). METHODS Sixty-six zirconia FDPs were manufactured onto two implants and classified as uniform thickness (UT) or anatomic design (AD). These framework design groups were then further divided into three subgroups (n=11): feldspathic porcelain-veneered zirconia FDPs (PVZ), indirect composite-veneered zirconia FDPs (IVZ), and metal-ceramic FDPs (MC). The FDPs were luted on the implant abutments and underwent fracture load testing. Significant differences were assessed by the Kruskal-Wallis test and Mann-Whitney U-test (α=0.05). RESULTS For UT group, median fracture load was significantly higher for the IVZ (1.87kN) and MC (1.90kN) specimens than for the PVZ specimens (1.38kN) (p<0.05). In the AD group, the IVZ specimens had the highest median fracture load (4.10kN) of the three groups tested. The AD group exhibited higher median fracture loads than the UT group in all subgroups. CONCLUSIONS Indirect composite appears to be a useful alternative to feldspathic porcelain as the layering material for implant-supported zirconia FDPs. The AD group had higher fracture loads than UT group. In addition, implant-supported indirect composite-veneered zirconia-based FDPs appear to be clinically feasible.
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Affiliation(s)
- Tomohide Kondo
- Department of Fixed Prosthodontics, Nihon University School of Dentistry, Tokyo, Japan
| | - Futoshi Komine
- Department of Fixed Prosthodontics, Nihon University School of Dentistry, Tokyo, Japan.
| | - Junichi Honda
- Department of Fixed Prosthodontics, Nihon University School of Dentistry, Tokyo, Japan
| | - Hiroki Takata
- Department of Fixed Prosthodontics, Nihon University School of Dentistry, Tokyo, Japan
| | - Yuta Moriya
- Department of Fixed Prosthodontics, Nihon University School of Dentistry, Tokyo, Japan
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Bankoğlu Güngör M, Karakoca Nemli S. Fracture resistance of CAD-CAM monolithic ceramic and veneered zirconia molar crowns after aging in a mastication simulator. J Prosthet Dent 2018. [DOI: 10.1016/j.prosdent.2017.05.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Komine F, Kamio S, Takata H, Yagawa S, Taguchi S, Taguchi K, Hashiguchi A, Matsumura H. Effect of framework design on fracture load after thermal cycling and mechanical loading of implant-supported zirconia-based prostheses. Dent Mater J 2018; 37:78-86. [PMID: 28883302 DOI: 10.4012/dmj.2017-057] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This study evaluated the effect of zirconia framework design on fracture load of implant-supported zirconia-based prostheses after thermal cycling and mechanical loading. Three different zirconia framework designs were investigated: uniform-thickness (UNI), anatomic (ANA), and supported anatomic (SUP) designs. Each framework was layered with feldspathic porcelain (ZAC group) or indirect composite material (ZIC group). The specimens then underwent fracture load testing after thermal cycling and cyclic loading. In the ZAC group, mean fracture load was significantly lower for UNI design specimens than for the other framework designs. In the ZIC group, there was no significant difference in mean fracture load between ANA design specimens and either UNI or SUP design specimens. To improve fracture resistance of implant-supported zirconia-based prostheses after artificial aging, uniformly thick layering material and appropriate lingual support with zirconia frameworks should be provided.
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Affiliation(s)
- Futoshi Komine
- Department of Fixed Prosthodontics, Nihon University School of Dentistry
| | - Shingo Kamio
- Department of Fixed Prosthodontics, Nihon University School of Dentistry
| | - Hiroki Takata
- Department of Fixed Prosthodontics, Nihon University School of Dentistry
| | - Shogo Yagawa
- Department of Fixed Prosthodontics, Nihon University School of Dentistry
| | - Serina Taguchi
- Department of Fixed Prosthodontics, Nihon University School of Dentistry
| | - Kohei Taguchi
- Department of Fixed Prosthodontics, Nihon University School of Dentistry
| | | | - Hideo Matsumura
- Department of Fixed Prosthodontics, Nihon University School of Dentistry
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Spies BC, Witkowski S, Vach K, Kohal RJ. Clinical and patient-reported outcomes of zirconia-based implant fixed dental prostheses: Results of a prospective case series 5 years after implant placement. Clin Oral Implants Res 2017; 29:91-99. [PMID: 28940708 DOI: 10.1111/clr.13072] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/29/2017] [Indexed: 01/08/2023]
Abstract
OBJECTIVE To evaluate the clinical and patient-reported outcome of all-ceramic zirconia implant supported fixed dental prostheses (FDPs) 5 years after implant installation. MATERIALS AND METHODS Thirteen patients were treated with two terminally placed one-piece zirconia implants for a three-unit FDP each. The FDPs consisted of a CAD/CAM-fabricated zirconia framework over-pressed with a fluor-apatite veneering ceramic and were adhesively cemented. Survival and success were assessed by applying modified US Public Health Service (USPHS) criteria and preparation of Kaplan-Meier (KM) plots. Alpha and Bravo ratings were accepted for success (among others including small area veneer chippings and occlusal roughness), whereas Charlie ratings allowing for intra-oral correction (e.g., polishing) were accepted for survival. Furthermore, patient-reported outcome measures (PROMs) were analyzed with the help of visual analogue scales (VAS). Wilcoxon matched-pairs signed-rank test (USPHS criteria) and linear mixed models (PROMs) were used to evaluate time effects on response variables. RESULTS All patients were available 61.8 ± 1.1 months after implant installation (53.6 ± 3.1 months after final prosthesis insertion). FDP survival was 100%. Significant incidence of veneer chipping (p = .0096) and occlusal roughness (p = .0019) was observed. Charlie rated extent of both phenomena resulted in a KM success estimate of 38.5% (95% CI: 14.1%-62.8%; seven FDPs with obvious roughness, three of them with extended veneer chipping). Compared with the pre-treatment assessments (30%-81% of satisfaction), all surveys at prosthetic delivery showed significantly improved VAS scores (66%-93%; p ≤ .038), except for speech (p = .341). Concerning function, esthetics and self-esteem, no decrease in satisfaction could be observed until the end of follow-up (90%-96%; p ≥ .057), whereas perception of sense (92%) and speech (95%) increased over time (p ≤ .030). Occurrence of technical complications did not correlate with patient satisfaction. CONCLUSIONS Bi-layered FDPs made from zirconia/fluor-apatite highly satisfied patients but showed significant incidence of technical complications.
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Affiliation(s)
- Benedikt Christopher Spies
- Department of Prosthetic Dentistry, Center for Dental Medicine, Medical Center - University of Freiburg, Faculty of Medicine - University of Freiburg, Freiburg, Germany
| | - Siegbert Witkowski
- Department of Prosthetic Dentistry, Center for Dental Medicine, Medical Center - University of Freiburg, Faculty of Medicine - University of Freiburg, Freiburg, Germany
| | - Kirstin Vach
- Center for Medical Biometry and Medical Informatics, Institute for Medical Biometry and Statistics, Medical Center - University of Freiburg, Faculty of Medicine - University of Freiburg, Freiburg, Germany
| | - Ralf-Joachim Kohal
- Department of Prosthetic Dentistry, Center for Dental Medicine, Medical Center - University of Freiburg, Faculty of Medicine - University of Freiburg, Freiburg, Germany
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Obermeier M, Ristow O, Erdelt K, Beuer F. Mechanical performance of cement– and screw–retained all–ceramic single crowns on dental implants. Clin Oral Investig 2017; 22:981-991. [DOI: 10.1007/s00784-017-2178-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Accepted: 07/06/2017] [Indexed: 11/30/2022]
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14
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Soares LM, Soares C, Miranda ME, Basting RT. Influence of Core-Veneer Thickness Ratio on the Fracture Load and Failure Mode of Zirconia Crowns. J Prosthodont 2017; 28:209-215. [DOI: 10.1111/jopr.12601] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/07/2017] [Indexed: 11/30/2022] Open
Affiliation(s)
- Luciana Mara Soares
- Department of Restorative Dentistry; Herman Ostrow School of Dentistry of USC; Los Angeles CA
| | | | - Milton Edson Miranda
- Department of Prosthodontics; São Leopoldo Mandic Institute and Dental Research Center; Campinas São Paulo Brazil
| | - Roberta Tarkany Basting
- Department of Restorative Dentistry; São Leopoldo Mandic Institute and Dental Research Center; Campinas São Paulo Brazil
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15
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ALSADON O, PATRICK D, JOHNSON A, POLLINGTON S, WOOD D. Fracture resistance of zirconia-composite veneered crowns in comparison with zirconia-porcelain crowns. Dent Mater J 2017; 36:289-295. [PMID: 28190816 DOI: 10.4012/dmj.2016-298] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Omar ALSADON
- Academic Unit of Restorative Dentistry, The School of Clinical Dentistry, The University of Sheffield
- Department of Dental Health, College of Applied Medical Sciences, King Saud University
| | - David PATRICK
- Academic Unit of Restorative Dentistry, The School of Clinical Dentistry, The University of Sheffield
| | - Anthony JOHNSON
- Academic Unit of Restorative Dentistry, The School of Clinical Dentistry, The University of Sheffield
| | - Sarah POLLINGTON
- Academic Unit of Restorative Dentistry, The School of Clinical Dentistry, The University of Sheffield
| | - Duncan WOOD
- Academic Unit of Restorative Dentistry, The School of Clinical Dentistry, The University of Sheffield
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16
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Honda J, Komine F, Kamio S, Taguchi K, Blatz MB, Matsumura H. Fracture resistance of implant-supported screw-retained zirconia-based molar restorations. Clin Oral Implants Res 2016; 28:1119-1126. [DOI: 10.1111/clr.12926] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/16/2016] [Indexed: 11/26/2022]
Affiliation(s)
- Junichi Honda
- Department of Fixed Prosthodontics; Nihon University School of Dentistry; Tokyo Japan
| | - Futoshi Komine
- Department of Fixed Prosthodontics; Nihon University School of Dentistry; Tokyo Japan
| | - Shingo Kamio
- Department of Fixed Prosthodontics; Nihon University School of Dentistry; Tokyo Japan
| | - Kohei Taguchi
- Department of Fixed Prosthodontics; Nihon University School of Dentistry; Tokyo Japan
| | - Markus B. Blatz
- Department of Preventive and Restorative Sciences; University of Pennsylvania School of Dental Medicine; Philadelphia PA USA
| | - Hideo Matsumura
- Department of Fixed Prosthodontics; Nihon University School of Dentistry; Tokyo Japan
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17
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Spies BC, Kohal RJ, Balmer M, Vach K, Jung RE. Evaluation of zirconia-based posterior single crowns supported by zirconia implants: preliminary results of a prospective multicenter study. Clin Oral Implants Res 2016; 28:613-619. [DOI: 10.1111/clr.12842] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/06/2016] [Indexed: 11/29/2022]
Affiliation(s)
- Benedikt Christopher Spies
- Department of Prosthetic Dentistry; Center for Dental Medicine; Medical Center - University of Freiburg; Freiburg Germany
| | - Ralf-Joachim Kohal
- Department of Prosthetic Dentistry; Center for Dental Medicine; Medical Center - University of Freiburg; Freiburg Germany
| | - Marc Balmer
- Clinic of Fixed and Removable Prosthodontics and Dental Material Science; Center of Dental Medicine; University of Zurich; Zurich Switzerland
| | - Kirstin Vach
- Center for Medical Biometry and Medical Informatics; Institute for Medical Biometry and Statistics; Medical Center - University of Freiburg; Freiburg Germany
| | - Ronald E. Jung
- Clinic of Fixed and Removable Prosthodontics and Dental Material Science; Center of Dental Medicine; University of Zurich; Zurich Switzerland
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18
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Spies BC, Witkowski S, Butz F, Vach K, Kohal RJ. Bi-layered zirconia/fluor-apatite bridges supported by ceramic dental implants: a prospective case series after thirty months of observation. Clin Oral Implants Res 2015; 27:1265-1273. [DOI: 10.1111/clr.12731] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/17/2015] [Indexed: 11/28/2022]
Affiliation(s)
- Benedikt Christopher Spies
- Medical Center - University of Freiburg; Center for Dental Medicine; Department of Prosthetic Dentistry; Freiburg Germany
| | - Siegbert Witkowski
- Medical Center - University of Freiburg; Center for Dental Medicine; Department of Prosthetic Dentistry; Freiburg Germany
| | - Frank Butz
- Medical Center - University of Freiburg; Center for Dental Medicine; Department of Prosthetic Dentistry; Freiburg Germany
| | - Kirstin Vach
- Medical Center - University of Freiburg; Center for Medical Biometry and Medical Informatics; Institute for Medical Biometry and Statistics; Freiburg Germany
| | - Ralf-Joachim Kohal
- Medical Center - University of Freiburg; Center for Dental Medicine; Department of Prosthetic Dentistry; Freiburg Germany
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