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Dental and Craniomaxillofacial Implant Surgery. J Oral Maxillofac Surg 2023; 81:E75-E94. [PMID: 37833030 DOI: 10.1016/j.joms.2023.06.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2023]
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Naumann M, Scholz P, Krois J, Schwendicke F, Sterzenbach G, Happe A. Monolithic hybrid abutment crowns (screw-retained) versus monolithic hybrid abutments with adhesively cemented monolithic crowns. Clin Oral Implants Res 2023; 34:209-220. [PMID: 36692161 DOI: 10.1111/clr.14031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Revised: 12/30/2022] [Accepted: 01/02/2023] [Indexed: 01/25/2023]
Abstract
OBJECTIVES The objective of this study is to compare monolithic hybrid abutment crowns (screw-retained) versus monolithic hybrid abutments with adhesively cemented monolithic single-tooth crowns. MATERIALS AND METHODS Twenty subjects in need of an implant-borne restoration were randomly assigned to receive either a cement-retained (CRR) or a screw-retained (SRR) implant-supported monolithic lithium disilicate (LS2 ) reconstruction. Each patient received a titanium implant with in internal conic connection. After osseointegration and second-stage surgery, healing abutments were placed for about 10 days. The type of restoration (CRR vs. SRR) was randomly assigned, and the restorations were manufactured of monolithic LS2 . Both types of restorations, CRR and SRR, were based on a titanium component (Ti-base) that was bonded to the abutment (CRR) or the crown (SRR). The follow-up period for all restoration was 36 months. Clinical outcome was evaluated according to Functional Implant Prosthetic Score (FIPS). Quality of live (OHIP) and patient's satisfaction were assessed using patient-reported outcome measures (PROMs). Primary endpoint was loss of restoration for any reason. Kaplan-Meier curves were constructed and log-rank testing was performed (p < .05). RESULTS One restoration of group CRR failed after 6 months due to loss of adhesion between Ti-base and individual abutment. No further biological or technical failures occurred. Kaplan-Meier analysis showed no significant difference between both treatment options (p = .317). There was no statistically significant difference between both types of restoration, neither for FIPS, OHIP, treatment time nor patient satisfaction (p > .05). CONCLUSION Monolithic hybrid abutment crowns (screw-retained) and monolithic hybrid abutment with adhesively cemented monolithic crowns using lithium disilicate showed no statistically significant difference for implant-based reconstructions in this pilot RCT setting.
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Affiliation(s)
- Michael Naumann
- Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders-Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Berlin, Germany
| | - Patricia Scholz
- Clinic for Dental Prosthetics, Center for Dental, Oral and Maxillofacial Medicine, University Hospital Ulm, Ulm, Germany
| | - Joachim Krois
- Department of Oral Diagnostics, Digital Health and Health Services Research, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Falk Schwendicke
- Department of Oral Diagnostics, Digital Health and Health Services Research, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Guido Sterzenbach
- Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders-Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Berlin, Germany
| | - Arndt Happe
- Clinic for Dental Prosthetics, Center for Dental, Oral and Maxillofacial Medicine, University Hospital Ulm, Ulm, Germany
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Kim HJ, Karasan D, Park K, Kwon HB, Han JS, Lee JH. Abutment margin levels and residual cement occurrence in cement-retained implant restorations: An observational study. Clin Oral Implants Res 2023; 34:33-41. [PMID: 36278423 DOI: 10.1111/clr.14015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 09/23/2022] [Accepted: 10/19/2022] [Indexed: 01/11/2023]
Abstract
OBJECTIVES To evaluate the association between different vertical levels of the abutment margin and residual cement prevalence in cement-retained implant restorations with customized abutments. METHODS One hundred and nine single-unit cement-retained implant restorations with a screw-access channel were included. The crowns were intraorally cemented on the abutments, and excess cement was removed. The abutment-crown complex was unscrewed, and the abutment-crown complex and peri-implant tissue were photographed. Residual cement presence was recorded by dividing the abutment-crown complex and peri-implant tissue into four quadrants: mesial, distal, buccal, and lingual. The prevalence of residual cement was compared according to the height of the custom abutment margin of the corresponding quadrant. A multilevel model was used for statistical analysis (α = .05). RESULTS Cement remnants were discovered on 72.48% of the dental implants. When the restoration quadrants were compared, cement remnants were present on 51.38%, 39.45%, 20.18%, and 17.43% of the mesial, distal, buccal, and lingual surfaces, respectively (p < .01). Regarding the abutment margin level, cement residues were found in 60.22% and 61.4% of the 0.5 mm subgingival and ≥1 mm subgingival margin groups, respectively, which were significantly more than those in the supragingival (23.65%) and equigingival (26.59%) margin groups (p < .01). After adjustment for confounding factors, the adjusted odds ratio (with 95% confidence interval) for residual cement in the subgingival margin groups was 3.664 (1.71, 7.852) when compared to the supragingival and equigingival margin groups. CONCLUSIONS The risk of residual cement occurrence was 3.66-fold higher with a subgingival abutment margin than with supragingival and equigingival abutment margins.
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Affiliation(s)
- Hyun Ju Kim
- Department of Periodontics, Seoul National University Dental Hospital, Seoul National University School of Dentistry, Seoul, Korea
| | - Duygu Karasan
- Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Koungjin Park
- Department of Prosthodontics and Dental Research Institute, Seoul National University School of Dentistry, Seoul, Korea
| | - Ho-Beom Kwon
- Department of Prosthodontics and Dental Research Institute, Seoul National University School of Dentistry, Seoul, Korea
| | - Jung-Suk Han
- Department of Prosthodontics and Dental Research Institute, Seoul National University School of Dentistry, Seoul, Korea
| | - Jae-Hyun Lee
- Department of Prosthodontics and Dental Research Institute, Seoul National University School of Dentistry, Seoul, Korea
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Biocompatibility of Lithium Disilicate and Zirconium Oxide Ceramics with Different Surface Topographies for Dental Implant Abutments. Int J Mol Sci 2021; 22:ijms22147700. [PMID: 34299319 PMCID: PMC8306444 DOI: 10.3390/ijms22147700] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 07/12/2021] [Accepted: 07/17/2021] [Indexed: 01/11/2023] Open
Abstract
Gingivafibroblasts were cultured on lithium disilicate, on zirconia dioxide, and on titanium with two different surface roughnesses (0.2 µm and 0.07 µm); Proliferation (MTT), Living/Dead staining, cytotoxicity (LDH), proliferation (FGF2), and inflammation (TNFα) were analyzed after 1 day and 21 days. Furthermore, alteration in cell morphology (SEM) was analyzed. The statistical analysis was performed by a Kruskal-Wallis test. The level of significance was set at p < 0.05. There were no distinct differences in cellular behavior between the tested roughness. There were slight differences between tested materials. Cells grown on zirconia dioxide showed higher cytotoxic effects. Cells grown on lithium disilicate showed less expression of TNFα compared to those grown on zirconia dioxide or titanium. These effects persisted only during the first time span. The results indicate that the two tested high-strength ceramics and surface properties are biologically suitable for transmucosal implant components. The findings may help clinicians to choose the most appropriate biomaterial as well as the most appropriate surface treatment to use in accordance with specific clinical dental applications.
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Yang Y, Zheng M, Jia YN, Li J, Li HP, Tan JG. Time-dependent reactive oxygen species inhibit Streptococcus mutans growth on zirconia after a helium cold atmospheric plasma treatment. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 120:111633. [PMID: 33545816 DOI: 10.1016/j.msec.2020.111633] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 10/03/2020] [Accepted: 10/13/2020] [Indexed: 01/19/2023]
Abstract
As an efficient strategy for the modification of material surfaces, cold atmospheric plasma (CAP) has been used in dentistry to improve hard and soft tissue integration of dental implant materials. We previously found the Streptococcus mutans growth was inhibited on the surface of zirconia implant abutment after a 60-second helium cold atmospheric plasma treatment. However, the mechanism of bacterial growth inhibition on CAP-treated zirconia has not been fully understood. The duration of bacterial inhibition effectiveness on CAP-treated zirconia has also been insufficiently examined. In this work, we assume that reactive oxygen species (ROS) are the primary cause of bacterial inhibition on CAP-treated zirconia. The ROS staining and an ROS scavenger were utilized to evaluate the bacterial intracellular ROS level, and to determine the role of ROS in bacterial growth inhibition when seeded on CAP-treated zirconia. The time-dependent effectiveness of CAP treatment was determined by changes in surface characteristics and antibacterial efficacy of zirconia with different storage times after CAP treatment. This study confirmed that the presence of reactive oxygen species on the zirconia surface after CAP treatment inhibits the growth of Streptococcus mutans on the material surface. Although the antibacterial efficacy of the 60-second CAP-treated zirconia decreased over time, there were fewer bacteria on the treated surface than those on the untreated surface after 14 days.
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Affiliation(s)
- Yang Yang
- Department of Prosthodontics, Peking University School and Hospital of Stomatology, National Clinical Research Center for Oral Diseases, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing 100081, PR China
| | - Miao Zheng
- Department of Stomatology, Peking University Third Hospital, Beijing 100191, PR China
| | - Ya-Nan Jia
- College of Mechanical Engineering, North China University of Science and Technology, Tangshan 063210, PR China
| | - Jing Li
- Department of Engineering Physics, Tsinghua University, Beijing 100084, PR China
| | - He-Ping Li
- Department of Engineering Physics, Tsinghua University, Beijing 100084, PR China.
| | - Jian-Guo Tan
- Department of Prosthodontics, Peking University School and Hospital of Stomatology, National Clinical Research Center for Oral Diseases, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing 100081, PR China.
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Elkharashi A, Grzech-Leśniak K, Deeb JG, Abdulmajeed AA, Bencharit S. Exploring the use of pulsed erbium lasers to retrieve a zirconia crown from a zirconia implant abutment. PLoS One 2020; 15:e0233536. [PMID: 32479553 PMCID: PMC7263620 DOI: 10.1371/journal.pone.0233536] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Accepted: 05/07/2020] [Indexed: 11/18/2022] Open
Abstract
Background Removal of cement-retained implant fixed restorations when needed, can be challenging. Conventional methods of crown removal are time consuming and costly for patients and practitioners. This research explored the use of two different types of pulsed erbium lasers as a non-invasive tool to retrieve cemented zirconia crowns from zirconia implant abutments. Materials and methods Twenty identical zirconia crowns were cemented onto 20 identical zirconia prefabricated abutments using self-adhesive resin cement. The specimens were divided into two groups for laser assisted crown removal; G1 for erbium-doped yttrium aluminum garnet laser (Er:YAG), and G2 for erbium, chromium-doped yttrium, scandium, gallium and garnet (Er,Cr:YSGG). For the G1, after the first crown removal, the specimens were re-cemented and removed again using the Er:YAG laser. Times needed to remove the crowns were recorded and analyzed using ANOVA (α = 0.05). The surfaces of the crown and the abutment were further examined using scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) analyses. Results The average times of zirconia crown removal from zirconia abutments were 5 min 20 sec and 5 min 15 sec for the Er:YAG laser of first and second experiments (G1), and 5 min 55 sec for the Er,Cr:YSGG laser experiment (G2). No statistical differences were observed among the groups. SEM and EDS examinations of the materials showed no visual surface damaging or material alteration from the two pulsed erbium lasers. Conclusions Both types of pulsed erbium lasers can be viable alternatives for retrieving a zirconia crown from a zirconia implant abutment. Despite operating at different wavelengths, the Er:YAG and Er,Cr:YSGG lasers, perform similarly in removing a zirconia crown from a zirconia implant abutment with similar parameters. There are no visual and elemental composition damages as a result of irradiation with pulsed erbium lasers.
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Affiliation(s)
- Ahmed Elkharashi
- Department of Biochemistry and Molecular Biology, School of Medicine, Virginia Commonwealth University, Richmond, Virginia, United States of America
| | | | - Janina Golob Deeb
- Department of Periodontology, School of Dentistry, Virginia Commonwealth University, Richmond, Virginia, United States of America
| | - Aous A. Abdulmajeed
- Department of General Practice, School of Dentistry, Virginia Commonwealth University, Richmond, Virginia, United States of America
| | - Sompop Bencharit
- Department of General Practice, School of Dentistry, Virginia Commonwealth University, Richmond, Virginia, United States of America
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Virginia Commonwealth University, Richmond, Virginia, United States of America
- Department of Biomedical Engineering, College of Engineering, Virginia Commonwealth University, Richmond, Virginia, United States of America
- * E-mail:
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Wang T, Wang L, Lu Q, Fan Z. Influence of anodized titanium abutments on the esthetics of the peri-implant soft tissue: A clinical study. J Prosthet Dent 2020; 125:445-452. [PMID: 32204926 DOI: 10.1016/j.prosdent.2019.12.023] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 12/16/2019] [Accepted: 12/16/2019] [Indexed: 11/27/2022]
Abstract
STATEMENT OF PROBLEM The grayish appearance of a titanium abutment discolors the peri-implant soft tissue, especially if the gingiva is thin. Whether an anodized titanium abutment can prevent the discoloration is unclear. PURPOSE The purpose of this clinical study was to investigate the color change of peri-implant soft tissue surrounding a titanium abutment that had been colored by anodic oxidation. MATERIAL AND METHODS Commercially available titanium abutments were anodized to form a gold and pink titanium abutment and formed the experimental groups. Unanodized titanium and zirconia abutment were used as the control groups. Four types of abutments were fabricated for each participant who received dental implants in the anterior maxilla. The abutments and corresponding definitive crowns were inserted, and the color of the peri-implant soft tissue and contralateral gingiva were measured with a spectrophotometer. The thickness of the peri-implant soft tissue was recorded after probing with an endodontic file. RESULTS Eleven participants were included in this study. The color differences caused by all tested abutments were higher than the critical threshold of ΔE=3.7. The mean color difference (ΔE), from low to high, was the zirconia, pink-anodized titanium, gold-anodized titanium, and unanodized titanium abutment; their values of (ΔE) were 6.81, 7.63, 7.90, and 8.74, respectively. The mean thickness of the peri-implant soft tissue was 2.41 ±0.52 mm. CONCLUSIONS Within the limitation of the small sample size in this study, the gold-anodized and pink-anodized titanium abutment achieved better esthetics for peri-implant soft tissue than the unanodized titanium abutment. Zirconia was the optimal abutment material for the esthetic region.
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Affiliation(s)
- Tingting Wang
- Resident, Department of Oral Implant, School & Hospital of Stomatology, Tongji University, Shanghai Engineering Research Center of Tooth Restoration and Regeneration, Shanghai, PR China
| | - Lina Wang
- Doctoral student, Department of Oral Implant, School & Hospital of Stomatology, Tongji University, Shanghai Engineering Research Center of Tooth Restoration and Regeneration, Shanghai, PR China
| | - Qianqian Lu
- Postgraduate student, Department of Oral Implant, School & Hospital of Stomatology, Tongji University, Shanghai Engineering Research Center of Tooth Restoration and Regeneration, Shanghai, PR China
| | - Zhen Fan
- Professor, Department of Oral Implant, School & Hospital of Stomatology, Tongji University, Shanghai Engineering Research Center of Tooth Restoration and Regeneration, Shanghai, PR China.
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Yang Y, Zheng M, Yang Y, Li J, Su YF, Li HP, Tan JG. Inhibition of bacterial growth on zirconia abutment with a helium cold atmospheric plasma jet treatment. Clin Oral Investig 2020; 24:1465-1477. [DOI: 10.1007/s00784-019-03179-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 12/19/2019] [Indexed: 12/14/2022]
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Abstract
PURPOSE The purpose of this systematic review was to identify and summarize clinical studies related to the fracture of zirconia abutments in implant treatments. MATERIAL AND METHODS Medline, Embase, and Cochrane library searches were performed and complemented by manual searches from database inception to February 11, 2018, for title and abstract analysis. RESULTS Initially, 645 articles were obtained through database searches. Fifty-three articles were selected for full-text analysis, and 15 studies met the inclusion criteria. The selected studies were analyzed regarding fracture rate, abutment-implant connection, time point of fracture, location of critical crack, causes, managements, and preventive measures with respect to zirconia abutment fracture. CONCLUSIONS Lower fracture rates were reported for internal connection with metal component (2-piece) zirconia abutments compared with external and internal full-zirconia connection (one-piece) zirconia abutments. Overpreparation and overload should be avoided in case of zirconia abutments.
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Ma S, Tawse‐Smith A, Brown SD, Duncan W. Immediately restored single implants in the aesthetic zone of the maxilla using a novel design: 5‐year results from a prospective single‐arm clinical trial. Clin Implant Dent Relat Res 2019; 21:344-351. [DOI: 10.1111/cid.12733] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 12/31/2018] [Accepted: 01/08/2019] [Indexed: 11/26/2022]
Affiliation(s)
- Sunyoung Ma
- Department of Oral Rehabilitation, Faculty of DentistrySir John Walsh Research Institute, University of Otago Dunedin New Zealand
| | - Andrew Tawse‐Smith
- Department of Oral Sciences, Faculty of DentistrySir John Walsh Research Institute, University of Otago Dunedin New Zealand
| | | | - Warwick Duncan
- Department of Oral Sciences, Faculty of DentistrySir John Walsh Research Institute, University of Otago Dunedin New Zealand
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Wang T, Wang L, Lu Q, Fan Z. Changes in the esthetic, physical, and biological properties of a titanium alloy abutment treated by anodic oxidation. J Prosthet Dent 2018; 121:156-165. [PMID: 30093130 DOI: 10.1016/j.prosdent.2018.03.024] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Revised: 03/19/2018] [Accepted: 03/20/2018] [Indexed: 10/28/2022]
Abstract
STATEMENT OF PROBLEM The grayish appearance of titanium abutments adversely affects peri-implant esthetics in patients with thin mucosa, impacting patient satisfaction with implant-supported restorations in esthetic regions. PURPOSE The purpose of this in vitro study was to change the color of titanium alloys with anodic oxidation and to evaluate alterations in the esthetic, physical, and biological properties of the anodized titanium alloys. MATERIAL AND METHODS Pink and yellow titanium alloys produced by anodization were the experimental groups, and the untreated titanium alloy and zirconia were used as the control groups. Pig gingiva was placed on the tested specimens to evaluate the esthetic effect by recording the color change in the gingiva. Physical properties including morphology, chemical composition, roughness, and contact angle were evaluated by scanning electron microscopy, atomic force microscopy, and a contact angle analysis system. Biological properties were evaluated by observing the cell behaviors of human gingival fibroblasts, using scanning electron microscopy, fluorescence microscopy, a live/dead viability assay, and a cell counting assay. RESULTS A variety of colors can be produced on the surfaces of titanium alloys by anodization at different voltages. Titanium alloys anodized at 60 and 65 V exhibited yellow and pink appearances, respectively. Color differences of gingiva caused by anodized titanium alloys were lower than those of the untreated titanium alloy, but they were higher than those of zirconia. Compared with the untreated titanium alloy, the anodized titanium alloys exhibited grain formation, a lower contact angle, and higher roughness. Cell morphology, proliferation, and viability on surfaces of anodized titanium alloys were similar to those of the untreated titanium alloy but lower than those of zirconia. CONCLUSIONS Anodization could change the color of titanium alloys to pink or yellow at different voltages. Grain formation, roughness, and hydrophilicity were increased after treatment. The esthetics and biocompatibility of anodized titanium alloys were not as good as that of zirconia, but the pink and yellow titanium alloys treated by anodization achieved better gingival esthetics than the untreated titanium alloy.
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Affiliation(s)
- Tingting Wang
- Resident, Department of Oral Implant, School and Hospital of Stomatology, Tongji University, Shanghai Engineering Research Center of Tooth Restoration and Regeneration, Shanghai, PR China
| | - Lina Wang
- Postgraduate student, Department of Oral Implant, School and Hospital of Stomatology, Tongji University, Shanghai Engineering Research Center of Tooth Restoration and Regeneration, Shanghai, PR China
| | - Qianqian Lu
- Postgraduate student, Department of Oral Implant, School and Hospital of Stomatology, Tongji University, Shanghai Engineering Research Center of Tooth Restoration and Regeneration, Shanghai, PR China
| | - Zhen Fan
- Professor, Department of Oral Implant, School and Hospital of Stomatology, Tongji University, Shanghai Engineering Research Center of Tooth Restoration and Regeneration, Shanghai, PR China.
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Triplett RG, Berger J, Jensen O, Louis P. Dental and Craniomaxillofacial Implant Surgery. J Oral Maxillofac Surg 2017; 75:e74-e93. [PMID: 28728740 DOI: 10.1016/j.joms.2017.04.030] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Sala L, Bascones-Martínez A, Carrillo-de-Albornoz A. Impact of abutment material on peri-implant soft tissue color. An in vitro study. Clin Oral Investig 2016; 21:2221-2233. [PMID: 27878464 DOI: 10.1007/s00784-016-2015-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Accepted: 11/16/2016] [Indexed: 10/20/2022]
Abstract
OBJECTIVES The objectives of the present study is to determine the differences in peri-implant soft tissue color with the utilization of titanium, titanium gold-plated, white zirconia, Vita Classical (VC) A4-shaded zirconia, and fluorescent white zirconia abutments and to establish the influence of gingival thickness on the resulting color. METHODS Four implants were contralaterally inserted in 19 fresh pig mandibles, and the color of the peri-implant mucosa with the different abutments was spectrophotometrically measured at 1-, 2-, and 3-mm height from the margin. RESULTS At 1-mm height, titanium significantly differed from all zirconia abutments in lightness (L*), chroma along red axis (a*), and chroma along yellow-blue axis (b*) parameters. At 2 mm, all zirconia abutments differed from titanium in b* but only fluorescent zirconia in a*. At 3 mm, titanium differed from VC A4-shaded and fluorescent zirconia abutments in b*. At soft tissue thicknesses <1 and 1-2 mm, titanium differed from fluorescent zirconia in a* and b* and from VC A4-shaded zirconia in b*; at thickness >2 mm, no differences were found among abutments. All abutments differed from natural teeth in a* and b* at all heights and thicknesses except for fluorescent zirconia at thickness >2 mm. The Euclidean distance (ΔΕ) differed between titanium abutments and gold, VC A4, and fluorescent zirconia at <1- and 1-2-mm thicknesses. CONCLUSION The natural gingival color was not reproduced with any abutment at gingival thicknesses <2 mm. The worst color match was with titanium abutments and the best with fluorescent zirconia, followed by VC A4-shaded zirconia. At gingival thicknesses >2 mm, no differences were detected among abutments. CLINICAL RELEVANCE This study demonstrates that the type of abutment and the gingival thickness affect the resulting peri-implant gingival color.
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Affiliation(s)
- Leticia Sala
- Department of Periodontology, School of Dentistry, Complutense University of Madrid, Madrid, Spain.
- Departmento de Estomatología III, Facultad de Odontología, Universidad Complutense de Madrid, Plaza Ramón y Cajal S/N, 28040, Madrid, Spain.
| | - Antonio Bascones-Martínez
- Department of Periodontology, School of Dentistry, Complutense University of Madrid, Madrid, Spain
- Departmento de Estomatología III, Facultad de Odontología, Universidad Complutense de Madrid, Plaza Ramón y Cajal S/N, 28040, Madrid, Spain
| | - Ana Carrillo-de-Albornoz
- Department of Periodontology, School of Dentistry, Complutense University of Madrid, Madrid, Spain
- Departmento de Estomatología III, Facultad de Odontología, Universidad Complutense de Madrid, Plaza Ramón y Cajal S/N, 28040, Madrid, Spain
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Beuer F, Sachs C, Groesser J, Gueth JF, Stimmelmayr M. Tooth-implant-supported posterior fixed dental prostheses with zirconia frameworks: 3-year clinical result. Clin Oral Investig 2015; 20:1079-86. [DOI: 10.1007/s00784-015-1594-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Accepted: 09/09/2015] [Indexed: 11/24/2022]
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Kalia AJ. Mini Screw Orthodontic Implant as Temporary Crown Restoration to Replace Unilateral Missing Lateral Incisor Post-Orthodontic Treatment. J ORAL IMPLANTOL 2015; 41:306-9. [DOI: 10.1563/aaid-joi-d-12-00273] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Ajit J. Kalia
- Department of Orthodontics, M. A. Rangoonwala Dental College, Pune, Maharashtra, India
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Happe A, Röling N, Schäfer A, Rothamel D. Effects of different polishing protocols on the surface roughness of Y-TZP surfaces used for custom-made implant abutments: a controlled morphologic SEM and profilometric pilot study. J Prosthet Dent 2015; 113:440-7. [PMID: 25749083 DOI: 10.1016/j.prosdent.2014.12.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Revised: 11/30/2014] [Accepted: 12/01/2014] [Indexed: 10/23/2022]
Abstract
STATEMENT OF PROBLEM Limited information is available on how to treat the surface of computer-aided design/computer-aided manufacturing (CAD/CAM)-derived implant abutments made of yttria tetragonal zirconia polycrystal (Y-TZP). PURPOSE The purpose of this study was to assess and compare 4 different standardized polishing protocols of dental zirconia with a standard handpiece and abrasives and to identify a standardized protocol to obtain a surface roughness of Ra=0.2 μm on dental Y-TZP. MATERIAL AND METHODS Forty specimens of Y-TZP were produced and finished with 4 different polishing protocols with standard dental abrasives. Protocol Co used a coarse rubber abrasive, protocol Me used the rubber abrasive of protocol Co plus a medium rubber abrasive, protocol Fi used the polishing sequences of protocol Me plus a fine rubber abrasive, and protocol UF used protocol Me plus ultrafine high-gloss polishing. Ten machined titanium disks served as control (C). Roughness measurement and scanning electron microscopy was performed for each specimen and tested for differences with ANOVA with Bonferroni correction and the Student t test (α=.05). RESULTS In the zirconia groups, Co (Ra 0.29 ±0.38 μm) showed significantly higher Ra values than Me (Ra 0.22 ±0.38 μm; P=.003), Fi (Ra 0.17 ±0.37 μm; P<.001), and UF (Ra 0.07 ±0.06 μm; P<.001). UF showed the significantly lowest Ra values of all zirconia groups (Co and Me: P<.001, Fi: P=.002). Differences between Me and Fi were not significant (P=.116). Comparison of the 4 zirconia surfaces to the control group (C; Ra=0.17 ±0.03) revealed significant differences for Co (P<.001) and UF (P=.006) but not Me (P=1.000) and Fi (P=.055). In comparison with the literature-based optimal roughness of Ra=0.2 μm, significant differences were found for Co, Fi, and UF (P<.05), but not for Me (P=.117). However, the machined titanium surface (C) also showed significantly smoother Ra values than 0.2 μm (P<.05, Student t test). CONCLUSIONS A roughness of Ra=0.2 μm on zirconia can be achieved by following protocol Me, whereas a roughness comparable to machined titanium is present after protocol Fi.
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Affiliation(s)
- Arndt Happe
- Private practice, Münster, Germany; Assistant Professor, Department of Oral and Maxillofacial Plastic Surgery and Implantology, University of Cologne, Germany.
| | | | - Andreas Schäfer
- Director, nanoAnalytics GmbH, Center for Nanotechnology, Münster, Germany
| | - Daniel Rothamel
- Assistant Professor, Department of Oral and Maxillofacial Plastic Surgery and Implantology, University of Cologne, Germany
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Barrero CH, Bencharit S, Petrola F. Case Report: Screw-Retained Zirconia Implant Restoration. J ORAL IMPLANTOL 2015; 42:359-62. [PMID: 25642597 DOI: 10.1563/aaid-joi-d-14-00027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Carlos H Barrero
- Department of Prosthodontics, University of North Carolina at Chapel Hill Dental School. Chapel Hill, NC
| | - Sompop Bencharit
- Department of Prosthodontics, University of North Carolina at Chapel Hill Dental School. Chapel Hill, NC
| | - Frank Petrola
- Department of Prosthodontics, University of North Carolina at Chapel Hill Dental School. Chapel Hill, NC
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Zembic A, Philipp AOH, Hämmerle CHF, Wohlwend A, Sailer I. Eleven-Year Follow-Up of a Prospective Study of Zirconia Implant Abutments Supporting Single All-Ceramic Crowns in Anterior and Premolar Regions. Clin Implant Dent Relat Res 2014; 17 Suppl 2:e417-26. [PMID: 25180473 DOI: 10.1111/cid.12263] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND Clinical studies on zirconia abutments report very good survival rates and biological and technical results, but few have an observation period of more than 5 years. PURPOSE The aim of this study was to assess the long-term performance of customized zirconia implant abutments supporting all-ceramic crowns. MATERIALS AND METHODS Twenty-seven patients receiving 54 single implants were included (25 incisors, 14 canines, 15 premolars in both jaws). Yttria-stabilized zirconia abutments were screwed to the implants with a defined torque. All-ceramic crowns were adhesively cemented onto the abutments. The implants, abutments, and crowns were clinically and radiographically examined after 11 years of use. Modified United States Public Health Service (USPHS) criteria were used to assess technical outcomes: fracture of abutment/crown framework/veneering ceramic, loosening of abutment screw/crown, marginal adaptation, anatomical form, occlusal wear, and abutment fit. The biological parameters were pocket probing depth, plaque control record, bleeding on probing, papilla index, and gingival/mucosal recession at implants and neighboring natural teeth. The cumulative success rate of abutments and crowns was calculated by the Kaplan-Meier method. The results of the USPHS criteria were analyzed descriptively. RESULTS Sixteen patients with 31 zirconia abutments were examined at 11.3 (±0.9) years after implantation. No abutment or crown was lost. The cumulative success rate was 96.3% for abutments and 90.7% for crowns. Two abutment screws loosened, and three crowns exhibited minor chipping. There were no biological complications. CONCLUSIONS Customized zirconia single implant abutments exhibited excellent long-term outcomes in anterior and premolar regions.
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Affiliation(s)
- Anja Zembic
- Clinic of Fixed and Removable Prosthodontics and Dental Material Science, Center for Dental Medicine, University of Zurich, Zurich, Switzerland.,Department of Oral Implantology and Prosthetic Dentistry, Academic Center for Dentistry Amsterdam, MOVE Research Institute, Amsterdam, The Netherlands
| | - Alexander Otto Hermann Philipp
- Effretikon, Switzerland.,Clinic for Preventive Dentistry, Periodontology and Cariology, Center for Dental Medicine, University of Zurich, Zurich, Switzerland
| | - Christoph Hans Franz Hämmerle
- Clinic of Fixed and Removable Prosthodontics and Dental Material Science, Center for Dental Medicine, University of Zurich, Zurich, Switzerland
| | | | - Irena Sailer
- Clinic of Fixed Prosthodontics and Biomaterials, School of Dental Medicine, University of Geneva, Geneva, Switzerland
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19
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Rödiger M, Rinke S, Ehret-Kleinau F, Pohlmeyer F, Lange K, Bürgers R, Gersdorff N. Evaluation of removal forces of implant-supported zirconia copings depending on abutment geometry, luting agent and cleaning method during re-cementation. J Adv Prosthodont 2014; 6:233-40. [PMID: 25006388 PMCID: PMC4085248 DOI: 10.4047/jap.2014.6.3.233] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Revised: 06/03/2014] [Accepted: 06/11/2014] [Indexed: 12/15/2022] Open
Abstract
PURPOSE To evaluate the effects of different abutment geometries in combination with varying luting agents and the effectiveness of different cleaning methods (prior to re-cementation) regarding the retentiveness of zirconia copings on implants. MATERIALS AND METHODS Implants were embedded in resin blocks. Three groups of titanium abutments (pre-fabricated, height: 7.5 mm, taper: 5.7°; customized-long, height: 6.79 mm, taper: 4.8°; customized-short, height: 4.31 mm, taper: 4.8°) were used for luting of CAD/CAM-fabricated zirconia copings with a semi-permanent (Telio CS) and a provisional cement (TempBond NE). Retention forces were evaluated using a universal testing machine. Furthermore, the influence of cleaning methods (manually, manually in combination with ultrasonic bath or sandblasting) prior to re-cementation with a provisional cement (TempBond NE) was investigated with the pre-fabricated titanium abutments (height: 7.5 mm, taper: 5.7°) and SEM-analysis of inner surfaces of the copings was performed. Significant differences were determined via two-way ANOVA. RESULTS Significant interactions between abutment geometry and luting agent were observed. TempBond NE showed the highest level of retentiveness on customized-long abutments, but was negatively affected by other abutment geometries. In contrast, luting with Telio CS demonstrated consistent results irrespective of the varying abutment geometries. Manual cleaning in combination with an ultrasonic bath was the only cleaning method tested prior to re-cementation that revealed retentiveness levels not inferior to primary cementation. CONCLUSION No superiority for one of the two cements could be demonstrated because their influences on retentive strength are also depending on abutment geometry. Only manual cleaning in combination with an ultrasonic bath offers retentiveness levels after re-cementation comparable to those of primary luting.
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Affiliation(s)
- Matthias Rödiger
- Department of Prosthodontics, School of Dentistry, University Medical Center Goettingen, Goettingen, Germany
| | - Sven Rinke
- Department of Prosthodontics, School of Dentistry, University Medical Center Goettingen, Goettingen, Germany
| | - Fenja Ehret-Kleinau
- Department of Prosthodontics, School of Dentistry, University Medical Center Goettingen, Goettingen, Germany
| | - Franziska Pohlmeyer
- Department of Prosthodontics, School of Dentistry, University Medical Center Goettingen, Goettingen, Germany
| | - Katharina Lange
- Department of Medical Statistics, University Medical Center Goettingen, Goettingen, Germany
| | - Ralf Bürgers
- Department of Prosthodontics, School of Dentistry, University Medical Center Goettingen, Goettingen, Germany
| | - Nikolaus Gersdorff
- Department of Prosthodontics, School of Dentistry, University Medical Center Goettingen, Goettingen, Germany
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20
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Delben JA, Barão VA, Ferreira MB, da Silva NR, Thompson VP, Assunção WG. Influence of abutment-to-fixture design on reliability and failure mode of all-ceramic crown systems. Dent Mater 2014; 30:408-16. [DOI: 10.1016/j.dental.2014.01.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2013] [Revised: 01/07/2014] [Accepted: 01/14/2014] [Indexed: 11/16/2022]
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21
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Egawa M, Miura T, Kato T, Saito A, Yoshinari M. In vitro adherence of periodontopathic bacteria to zirconia and titanium surfaces. Dent Mater J 2014; 32:101-6. [PMID: 23370877 DOI: 10.4012/dmj.2012-156] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Tetragonal zirconia polycrystals (TZP) has drawn attention as a potential alternative to titanium (Ti) in dental implant treatment, as it minimizes both allergic reactions and esthetic problems. It is also important for dental implants to maintain plaque-free surfaces to prevent peri-implantitis. The purpose of this study was to investigate in vitro adherence of periodontopathic bacteria to TZP comparing with Ti.Periodontopathic bacteria were cultured on polished discs of two kinds of TZP, and Ti as a control. After incubation, the numbers of adherent bacteria were estimated. No significant differences among specimens were observed in the initial attachment, although a decrease was observed in initial attachment to saliva-coated specimens. In the bacterial colonization, no significant differences were recognized among specimens. The adherence of the periodontopathic bacteria on TZP was similar to that on Ti. These results suggest that a strategy is required for inhibition of the bacterial adherence to TZP.
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Affiliation(s)
- Masahiro Egawa
- Division of Oral Implants Research, Oral Health Science Center, Tokyo Dental College, Mihama-ku, Chiba, Japan
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22
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Vindasiute E, Puisys A, Maslova N, Linkeviciene L, Peciuliene V, Linkevicius T. Clinical Factors Influencing Removal of the Cement Excess in Implant-Supported Restorations. Clin Implant Dent Relat Res 2013; 17:771-8. [DOI: 10.1111/cid.12170] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Egle Vindasiute
- Vilnius Research Group; Vilnius Lithuania
- Vilnius Implantology Center; Vilnius Lithuania
| | - Algirdas Puisys
- Vilnius Research Group; Vilnius Lithuania
- Vilnius Implantology Center; Vilnius Lithuania
| | | | - Laura Linkeviciene
- Institute of Odontology; Faculty of Medicine; Vilnius University; Vilnius Lithuania
| | - Vytaute Peciuliene
- Institute of Odontology; Faculty of Medicine; Vilnius University; Vilnius Lithuania
| | - Tomas Linkevicius
- Vilnius Research Group; Vilnius Lithuania
- Vilnius Implantology Center; Vilnius Lithuania
- Institute of Odontology; Faculty of Medicine; Vilnius University; Vilnius Lithuania
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23
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Martínez-Rus F, Rivera B, Özcan M, Pradíes G. Prosthodontic considerations in the implant-supported all-ceramic restoration of congenitally missing maxillary lateral incisor: a clinical report. J Prosthodont 2013; 23:232-5. [PMID: 24118630 DOI: 10.1111/jopr.12096] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/09/2013] [Indexed: 11/26/2022] Open
Abstract
The congenitally missing maxillary lateral incisor is the most common agenesis in the anterior region. There are several treatment options for this anomaly, which causes severe deficiencies: orthodontic space closure, tooth-supported restoration, or single-tooth implant. Each of these solutions has a high degree of success if used in the correct situation. An implant-supported restoration with an interdisciplinary approach provides a predictable outcome. This article describes the treatment of a patient with agenesis of the maxillary left lateral incisor. After orthodontic space management, it was decided to restore the tooth with an all-ceramic crown cemented on a zirconia custom abutment, which fractured after only 6 weeks of service. Fractographic analysis revealed that the failure was due to over-reduction of the buccal wall to correct the labial emergence of the implant. Zirconia abutments should be designed with even wall thicknesses of at least 0.8 mm to avoid areas that may compromise functional success.
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24
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Borges T, Lima T, Carvalho Á, Dourado C, Carvalho V. The influence of customized abutments and custom metal abutments on the presence of the interproximal papilla at implants inserted in single-unit gaps: a 1-year prospective clinical study. Clin Oral Implants Res 2013; 25:1222-1227. [DOI: 10.1111/clr.12257] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/04/2013] [Indexed: 01/27/2023]
Affiliation(s)
- Tiago Borges
- Department of Oral Surgery and Implant Dentistry; Portuguese Catholic University; Viseu Portugal
| | - Tiago Lima
- Department of Oral Surgery and Implant Dentistry; Bragança Private Medical Centre; Bragança Portugal
| | - Ágata Carvalho
- Department of Oral Surgery and Implant Dentistry; Bragança Private Medical Centre; Bragança Portugal
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25
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Smith RA, Block MS, Sclar AG. Dental and craniomaxillofacial implant surgery. J Oral Maxillofac Surg 2012; 70:e72-106. [PMID: 23128008 DOI: 10.1016/j.joms.2012.07.032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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26
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Mitsias M, Koutayas SO, Wolfart S, Kern M. Influence of zirconia abutment preparation on the fracture strength of single implant lithium disilicate crowns after chewing simulation. Clin Oral Implants Res 2012; 25:675-82. [PMID: 23106096 DOI: 10.1111/clr.12058] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/08/2012] [Indexed: 11/28/2022]
Abstract
OBJECTIVE The use of all-ceramic crowns over zirconia abutments is a well-established esthetic treatment option in implant dentistry; however, the effect of the mechanical processing due to abutment preparation has not been investigated under functional loading. The purpose of the study was to evaluate the influence of the zirconia abutment preparation depth and preparation mode on the fracture strength and fracture mode of lithium disilicate crowns after chewing simulation. MATERIAL AND METHODS Seventy single implant-supported lithium disilicate glass-ceramic crowns (IPS e.max Press, Ivoclar Vivadent) were adhesively cemented (Multilink Automix, Ivoclar Vivadent) onto zirconia abutments (ZirDesign, Astra Tech) using implants with a diameter of 4.5 mm and a length of 15.0 mm (Osseospeed, Astra Tech). Study design concerned the replacement of a maxillary central incisor (11.0 mm in height and 8.0 mm in width). Subgroups (n = 7) were subjected to dynamic loading (C) up to 1.2 × 10(6) loading cycles at 135° with 98N in a thermomechanical chewing simulator (Kausimulator, Willytech); followed by quasi-static loading at a cross-head speed of 0.5 mm/min until fracture in a universal testing machine (Z010/TN2S, Zwick). Additional subgroups were also subjected to quasi-static loading (S) at 135°. Lithium disilicate implant crowns were divided into five study groups (n = 14) according to the abutment preparation depth [A (control): 0.5 mm, B: 0.7 mm, C: 0.9 mm, and preparation mode [(No label): milling by the manufacturer, (P): copy-milling by the Celay System (Mikrona)]. RESULTS All specimens survived dynamic loading and mean fracture strengths (N) after quasi-static loading were as follows: Group SA: 384 ± 84; Group CA: 403 ± 67; Group SB: 294 ± 95; Group CB: 374 ± 75; Group SC: 332 ± 52; Group CC: 373 ± 105; Group SPB: 332 ± 80; Group CPB: 499 ± 91; Group SPC: 380 ± 101; and Group CPC: 358 ± 54. CONCLUSIONS Statistical analysis using multiple linear regression showed that both the preparation depth and mode had no influence on the fracture strength of the implant crowns (P > 0.05); however, fracture strength increased statistically significantly after 5 years chewing simulation (P = 0.01).
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Affiliation(s)
- Miltiadis Mitsias
- Department of Prosthodontics, Propaedeutics and Dental Materials, School of Dentistry Christian-Albrechts University at Kiel, Kiel, Germany; Private Practice, Athens, Greece
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Happe A, Schulte-Mattler V, Fickl S, Naumann M, Zöller JE, Rothamel D. Spectrophotometric assessment of peri-implant mucosa after restoration with zirconia abutments veneered with fluorescent ceramic: a controlled, retrospective clinical study. Clin Oral Implants Res 2011; 24 Suppl A100:28-33. [PMID: 22145809 DOI: 10.1111/j.1600-0501.2011.02361.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/02/2011] [Indexed: 11/30/2022]
Abstract
OBJECTIVES The purpose of this study was to investigate the optical appearance of the soft tissue labial to dental implants restored with fluorescent ceramic-veneered zircona abutments. It was hypothesized that the tested abutment design leads to an increased brightness in the marginal peri-implant tissue, which does not differ from that of natural teeth. Moreover, a reduction of the color difference that has been reported from other abutment materials was expected. MATERIALS AND METHODS A total of 12 patients with single titanium implants in the maxillary anterior region were recruited. All implants (N = 12) were restored with zirconia abutments veneered with fluorescent ceramic and full-ceramic crowns. Color measurements of the peri-implant mucosa at the test sites were made of the facial aspect of the teeth using a Spectroshade-spectrophotometer. The gingiva of a contralateral or adjacent natural tooth served as a control. Color data (CIE-L*a*b* color coordinates) were obtained in five incremental areas of 1 × 2 mm in both test and control sites. ∆E-values were calculated from the ΔL*, Δa* and Δb* values for each patient. RESULTS Data acquisition from the test site demonstrated lower mean values of L*, a* and b* than the control site. Statistical significance between the test site and control site was reached in the L* values only in the second of the five incremental areas (P < 0.05, Wilcoxon test). However, discrepancies in a*- and b*-values reached a statistically significant difference in the incremental areas 1, 2 and 4, and in b* in area 5 (P < 0.05, Wilcoxon test). Medians of the ∆E-values in all five increments were found to be higher than the clinical perceptual threshold of 3.7. However, considering the original data, five individual patients did not reach the threshold in increment 1 and 2, two in increment 3 and three in increment 4. None of the patients showed lower ∆E-values than the perceptual threshold of 3.7 in increment 5, which had the largest distance from the gingival margin. CONCLUSION The tested abutment design leads to a peri-implant soft tissue color that, in the critical marginal area, in five of 12 patients did not statistically differ from the tissue of the gingiva of natural teeth. Particularly, the brightness of the peri-implant soft-tissue seemed to be more adapted to the natural situation using a fluorescent abutment design.
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Affiliation(s)
- Arndt Happe
- Department of Oral and Maxillofacial Plastic Surgery, University of Cologne, Germany.
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28
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Tsai BY. A Method for Obtaining Peri-Implant Soft-Tissue Contours by Using Screw-Retained Provisional Restorations as Impression Copings: A Clinical Report. J ORAL IMPLANTOL 2011; 37:605-9. [DOI: 10.1563/aaid-joi-d-10-00026.1] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In the esthetic zone, remodeling of the peri-implant soft-tissue contours through the use of provisional restorations is one of the imperative key factors for optimizing outcomes. Several methods have been described to produce the desired peri-implant soft-tissue contours using customized impression copings or cement-retained provisional crowns. The aim of this article is to present an alternative method for obtaining the desired peri-implant soft-tissue contours by using screw-retained provisional restorations as impression copings, which facilitates the definitive prosthesis fabrication.
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Affiliation(s)
- Bi-Yuan Tsai
- Department of Prosthodontics, Tzu Chi General Hospital Taipei Branch, Taipei, Taiwan, and School of Medicine, Tzu Chi University, Hualien, Taiwan.
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29
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Roe P, Kan JYK, Rungcharassaeng K, Won JB. Retrieval of a Fractured Zirconia Implant Abutment Using a Modified Crown and Bridge Remover: A Clinical Report. J Prosthodont 2011; 20:315-8. [DOI: 10.1111/j.1532-849x.2011.00696.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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30
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Hayakawa T, Yoshinari M, Nitta K, Inoue K. Collagen Nanofiber on Titanium or Partially Stabilized Zirconia by Electrospray Deposition. J HARD TISSUE BIOL 2010. [DOI: 10.2485/jhtb.19.5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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