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Nassar HI, Fateen A. Accuracy of fit for cobaltchromium bar over two implants fabricated with different manufacturing techniques: an in-vitro study. BMC Oral Health 2023; 23:946. [PMID: 38031111 PMCID: PMC10688085 DOI: 10.1186/s12903-023-03700-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2023] [Accepted: 11/22/2023] [Indexed: 12/01/2023] Open
Abstract
OBJECTIVE The purpose of the invitro research was to compare the fit of Cobalt Chromium customized bar fabricated with different manufacturing processes cast metal bar, milled bar and 3D printed bar using scanning electron microscope. MATERIALS AND METHODS Clear epoxy resin molds were prepared. In each mold two parallel implants with a 14 mm distance from each other were embedded. Thirty Co-Cr custom bars were constructed and were divided equally into three groups: Group (I) (Co-Cr conv), group (II) milled bar (Co-Cr milled), and group (III) printed bar (Co-Cr print). The marginal fit at implant-abutment interface was scanned using scanning electron microscope (SEM). RESULTS There was a significant difference between the three studied groups regarding marginal misfit the between implant and fabricated bars with p-value < 0.001. The highest value of micro-gap distance was found in Co-Cr conventional group (7.95 ± 2.21 μm) followed by Co-Cr 3D printed group (4.98 ± 1.73) and the lower value were found in Co-Cr milled (3.22 ± 0.75). CONCLUSION The marginal fit of milled, 3D printed and conventional cast for Co-Cr alloy were within the clinically acceptable range of misfit. CAD/CAM milled Co-Cr bar revealed a superior internal fit at the implant-abutment interface. This was followed by selective laser melting (SLM) 3D printed bar and the least fit was shown for customized bar with the conventional lost wax technique.
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Affiliation(s)
- Hossam I Nassar
- Faculty of Oral and Dental Medicine, Future University in Egypt, Cairo, Egypt.
| | - Ayman Fateen
- Faculty of Oral and Dental Medicine, Future University in Egypt, Cairo, Egypt
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Karasan D, Pitta J, Zarauz C, Strasding M, Liu X, Fehmer V, Sailer I. The influence of titanium-base abutment geometry and height on mechanical stability of implant-supported single crowns. Clin Oral Implants Res 2023. [PMID: 37929698 DOI: 10.1111/clr.14207] [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: 08/02/2023] [Revised: 10/22/2023] [Accepted: 11/01/2023] [Indexed: 11/07/2023]
Abstract
AIM This study aimed to investigate the influence of titanium base (ti-base) abutment macro- and micro-geometry on the mechanical stability of polymer-infiltrated ceramic network (PICN) screw-retained implant-supported single crowns (iSCs). MATERIALS AND METHODS Twelve specimens per group were used, comprising six different implant/ti-base abutment combinations restored with PICN iSCs: Nb-T (gingival height [GH]: 1.5 mm, prosthetic height [PH]: 4.3 mm), CC (GH: 0.8 mm, PH: 4.3 mm), CC-P (GH: 0.8 mm, PH: 7 mm), Nb-V (GH: 1.5 mm, PH: 6 mm), St (GH: 1.5 mm, PH: 5.5 mm), and Th (GH: 0.5 mm, PH: 9 mm). The specimens underwent thermo-mechanical aging, and those that survived were subsequently subjected to static loading until failure. The data were analyzed using a one-way ANOVA test followed by Tukey post hoc test (α = .05). RESULTS All specimens survived thermo-mechanical aging without complications, namely, visible cracks, debonding, or screw loosening. Th group demonstrated the highest strength values among all the groups, with significant differences compared to Nb-T (p < .05), CC (p < .001), and St (p < .001). Additionally, CC-P group exhibited significantly superior fracture strength results compared to CC (p < .05) and St (p < .05). CONCLUSION The choice of ti-base, particularly prosthetic height, had a significant influence on fracture resistance of PICN iSCs. Nevertheless, the height or geometrical features of the ti-base did not exhibit a significant influence on the mechanical behavior of the iSC/ti-base assembly under thermomechanical loading, as all specimens withstood the aging without complication or failure.
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Affiliation(s)
- Duygu Karasan
- Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland
| | - João Pitta
- Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Cristina Zarauz
- Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Malin Strasding
- Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Xinran Liu
- Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland
- Department of Comprehensive Dentistry, Peking University and Hospital of Stomatology First Clinical Division, Beijing, China
| | - Vincent Fehmer
- Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Irena Sailer
- Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland
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3
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Strazzi-Sahyon HB, Bergamo ETP, Gierthmuehlen PC, Lopes ACO, Alves LMM, Benalcázar Jalkh EB, Zahoui A, Coelho PG, de Carvalho AM, Bonfante EA. In vitro assessment of the effect of luting agents, abutment height, and fatigue on the retention of zirconia crowns luted to titanium base implant abutments. J Prosthet Dent 2023; 130:739.e1-739.e8. [PMID: 37684141 DOI: 10.1016/j.prosdent.2023.07.032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2023] [Revised: 07/27/2023] [Accepted: 07/31/2023] [Indexed: 09/10/2023]
Abstract
STATEMENT OF PROBLEM The bonding of implant-supported prostheses is determined by abutment material, convergence angle, height, surface treatment, and luting agents. However, studies evaluating the bonding of luting agents to titanium base abutments with different heights under fatigue conditions are scarce. PURPOSE The purpose of this in vitro study was to evaluate the retention of zirconia crowns bonded with different luting agents to titanium base abutments of different heights before and after fatigue testing. MATERIAL AND METHODS Zirconia crowns were designed, milled, and distributed into 4 experimental groups according to the luting agents (G-Multi Primer/G-Cem LinkForce [MP/GC] and Scotchbond Universal/RelyX Ultimate [SU/RU]) and titanium base abutment heights (2.5 mm and 4 mm) (n=10). Pull-out testing was performed in a universal testing machine at a crosshead speed of 1 mm/min until crown displacement. Fatigue testing was performed by an electric precision fatigue simulator (1×106 cycles; 100 N; and 15 Hz), followed by pull-out testing of fatigued specimens. Collected data were statistically evaluated by using a linear mixed model after post hoc comparisons by the least significant difference test (α=.05). RESULTS Luting agents, abutment heights, and fatigue influenced the bonding retention of zirconia crowns to titanium base abutments. SU/RU agents promoted higher pull-out compared with MP/GC for both abutment heights before and after fatigue. Higher abutment height increased pull-out regarding lower abutment height for SU/RU materials before and after fatigue testing. Although fatigue had no significant effect on the pull-out of MP/GC, lower bond retention was observed for SU/RU after fatigue, regardless of abutment height. CONCLUSIONS Luting agent composition and the interaction with abutment height and fatigue influenced the retention of zirconia crowns to titanium base abutments.
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Affiliation(s)
- Henrico B Strazzi-Sahyon
- Postdoctoral Researcher, Department of Prosthodontics and Periodontology, Bauru School of Dentistry, University of Sao Paulo (USP), São Paulo, Brazil.
| | - Edmara T P Bergamo
- Postdoctoral Researcher, Department of Prosthodontics and Periodontology, Bauru School of Dentistry, University of Sao Paulo (USP), São Paulo, Brazil; Postdoctoral Researcher, Biomaterials Division, New York University College of Dentistry, New York, NY
| | - Petra C Gierthmuehlen
- Professor, Department of Prosthodontics, School of Dentistry, Heinrich-Heine-University, Düsseldorf, Germany
| | - Adolfo C O Lopes
- Postgraduate student, Department of Prosthodontics and Periodontology, Bauru School of Dentistry, University of Sao Paulo (USP), São Paulo, Brazil
| | - Larissa M M Alves
- Postdoctoral Researcher, Department of Prosthodontics and Periodontology, Bauru School of Dentistry, University of Sao Paulo (USP), São Paulo, Brazil
| | - Ernesto B Benalcázar Jalkh
- Postdoctoral Researcher, Department of Prosthodontics and Periodontology, Bauru School of Dentistry, University of Sao Paulo (USP), São Paulo, Brazil
| | - Abbas Zahoui
- Postgraduate student, Department of Prosthodontics and Periodontology, Bauru School of Dentistry, University of Sao Paulo (USP), São Paulo, Brazil
| | - Paulo G Coelho
- Professor, Department of Surgery, University of Miami Miller School of Medicine, Miami, FL
| | - Alexandre M de Carvalho
- Postdoctoral Researcher, Department of Prosthodontics and Periodontology, Bauru School of Dentistry, University of Sao Paulo (USP), São Paulo, Brazil
| | - Estevam A Bonfante
- Professor, Department of Prosthodontics and Periodontology, Bauru School of Dentistry, University of Sao Paulo (USP), São Paulo, Brazil
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4
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Ibrahim EA, Khamis MM, Ezzelarab S, Abdelhamid AM. Retention of zirconia crowns to titanium bases with straight versus angled screw access channels: an invitro study. BMC Oral Health 2023; 23:458. [PMID: 37420233 PMCID: PMC10326962 DOI: 10.1186/s12903-023-03177-7] [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: 02/16/2023] [Accepted: 06/27/2023] [Indexed: 07/09/2023] Open
Abstract
BACKGROUND The aim of this study was to assess the impact of abutments with angled screw access channel on the retention of zirconia crowns. METHODS Seven implant replicas were inserted in epoxy resin blocks. Fourteen zirconia crowns for central incisor tooth were digitally fabricated and cemented to titanium bases (Ti-bases) with resin cement. Titanium bases were categorized into 2 groups (n = 7). Control group (Group STA) included straight screw access channel abutments. Study group (Group ASC) included angled screw access channel abutments. Following aging (5 °C-55 °C, 60 s; 250,000 cycles, 100 N, 1.67 Hz), the pull-off forces (N) were recorded by using retention test (1 mm/min). Types of failure were defined as (Type 1; Adhesive failure when luting agent predominantly remained on the Ti-base surface (> 90%); Type 2; Cohesive failure when luting agent remained on both Ti-base and crown surfaces; and Type 3; Adhesive failure when luting agent predominantly remained on the crown (> 90%). Statistical analysis was conducted by using (IBM SPSS version 28). Normality was checked by using Shapiro Wilk test and Q-Q plots. Independent t-test was then used to analogize the groups. RESULTS Mean ± standard deviation of retention force records ranged from 1731.57 (63.68) N (group STA) to 1032.29 (89.82) N (group ASC), and there was a statistically significant variation between the 2 groups (P < .05). Failure modes were Type 2 for group STA and Type 3 for group ASC. CONCLUSIONS The retention of zirconia crowns to abutments with a straight screw access channel is significantly higher than abutments with angled screw access channel.
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Affiliation(s)
- Eman Assem Ibrahim
- Department of Prosthodontics, Faculty of Dentistry, Alexandria University, 1st floor, Champollion Street - Azarita, Alexandria, Egypt.
| | - Mohamed Moataz Khamis
- Department of Prosthodontics, Faculty of Dentistry, Alexandria University, 1st floor, Champollion Street - Azarita, Alexandria, Egypt
| | - Salah Ezzelarab
- Department of Prosthodontics, Faculty of Dentistry, Alexandria University, 1st floor, Champollion Street - Azarita, Alexandria, Egypt
| | - Ahmed M Abdelhamid
- Department of Prosthodontics, Faculty of Dentistry, Alexandria University, 1st floor, Champollion Street - Azarita, Alexandria, Egypt
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5
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Choi JH, Heo SJ, Koak JY, Kim SK, Park JM, Ahn JS. Effect of hemispherical dimples at titanium implant abutments for the retention of cemented crowns. J Adv Prosthodont 2023; 15:63-71. [PMID: 37153008 PMCID: PMC10154144 DOI: 10.4047/jap.2023.15.2.63] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 12/06/2022] [Accepted: 01/31/2023] [Indexed: 05/09/2023] Open
Abstract
PURPOSE The aim of this study was to assess the effect of hemispherical dimple structures on the retention of cobalt-chromium (Co-Cr) crowns cemented to titanium abutments, with different heights and numbers of dimples on the axial walls. MATERIALS AND METHODS 3.0-mm and 6.0-mm abutments (N = 180) and Co-Cr crowns were prepared. The experimental groups were divided into two and four dimple groups. The crowns were cemented by TempBond and PANAVIA F 2.0 cements. The retention forces were measured after thermal treatments. A two-way Analysis of Variance (ANOVA) and post-hoc Tukey HSD test were conducted to analyze change in retention forces by use of dimples between groups, as well as t test for the effect of abutment height change (α = .05). RESULTS Results of the two-way ANOVA showed a statistically significant difference in retention force due to the use of dimples, regardless of the types of cements used (P < .001). A significantly higher mean retention forces were observed in the groups with dimples than in the control group, using the post hoc Tukey HSD test (P < .001). Results of t test displayed a statistically significant increase in the retention force with 6.0-mm abutments compared with 3.0-mm abutments (P < .001). The groups without dimples revealed adhesive failure of cements, while the groups with dimples showed mixed failure of cements. CONCLUSION Use of hemispherical dimples was effective for increasing retention forces of cemented crowns.
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Affiliation(s)
- Jung-Hoon Choi
- Department of Prosthodontics, School of Dentistry, Seoul National University, Seoul, Republic of Korea
| | - Seong-Joo Heo
- Department of Prosthodontics, School of Dentistry, Seoul National University, Seoul, Republic of Korea
| | - Jai-Young Koak
- Department of Prosthodontics, School of Dentistry, Seoul National University, Seoul, Republic of Korea
| | - Seong-Kyun Kim
- Department of Prosthodontics, School of Dentistry, Seoul National University, Seoul, Republic of Korea
| | - Ji-Man Park
- Department of Prosthodontics, School of Dentistry, Seoul National University, Seoul, Republic of Korea
| | - Jin-Soo Ahn
- Department of Dental Biomaterials Science and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Republic of Korea
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6
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Moreno ALDM, dos Santos DM, Bertoz APDM, Goiato MC. Abutment on Titanium-Base Hybrid Implant: A Literature Review. Eur J Dent 2022. [DOI: 10.1055/s-0042-1750801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
Abstract
AbstractAn increase in the use of Computer-Aided Design (CAD) and Computer-Aided Manufacturing (CAM) technologies challenges the conventional prosthetic fabrication procedures that are practical and centered on a digital workflow for the patient, especially for dental implants. Increasing workflow of digital restoration work, considering computer-used CAM for restoration technology systems and also fast/CAM for building restoration technology; fast/CAD, also known as abut-Base, has increased interest. Studies on adaptation of different restorative materials, on titanium (Ti)-base abutments, traction, and transformed cycling have become relevant. The objective of this work was to research, through literature studies, on restoration-type abutments. A total of 24 articles were found after searching the following terms in PubMed/Medline, Scopus, and Embase databases: “ti-base AND abutment.” Twenty-one manuscripts selected from the inclusion and exclusion criteria. After an analysis of these articles, it was concluded that the Ti-base abutment and components from the same manufacturer as the Implant should be used preferably; milled monolithic crowns designed to adapt to the Ti-base the hybrid abutment-crown assembly does not affect torque maintenance after thermal aging; the saliva and cleaning protocol of the Ti-base bonding surfaces can influence the operations of the Ti-base crowns; Ti-base and Crown surface treatment is recommended for better applicability and stability results, and the superiority of resin-based cements compared with other types of cements.
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Affiliation(s)
- André Luiz de Melo Moreno
- Department of Dental Materials and Prosthodontics, São Paulo State University, School of Dentistry, Araçatuba, São Paulo, Brazil
| | - Daniela Micheline dos Santos
- Department of Dental Materials and Prosthodontics, São Paulo State University, School of Dentistry, Araçatuba, São Paulo, Brazil
| | | | - Marcelo Coelho Goiato
- Department of Dental Materials and Prosthodontics, São Paulo State University, School of Dentistry, Araçatuba, São Paulo, Brazil
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7
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Veselinović V, Marin S, Tatić Z, Trtić N, Dolić O, Adamović T, Arbutina R, Šćepanović M, Todorović A. Application of Semipermanent Cements and Conventional Cement with Modified Cementing Technique in Dental Implantology. Acta Stomatol Croat 2022; 55:367-379. [PMID: 35001932 PMCID: PMC8734451 DOI: 10.15644/asc55/4/4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Accepted: 09/03/2021] [Indexed: 10/31/2022] Open
Abstract
Objectives The aim of this study was to evaluate the influence of artificial ageing on the retention force of original semipermanent cements, as well as the possibility of using conventional cements for semipermanent cementation with adequate modification of the cementing protocol. Materials and methods Forty CoCrMo alloy crowns were divided in four groups (each group n=10) and fixed with two semipermanent cements (resin-based and glass ionomer-based cements) and one conventional (zinc phosphate), using conventional and modified cementation techniques on titanium abutments. The samples were stored in humid conditions for 24 hours at 37°C and subjected to thermocycling (500 cycles) and mechanical cyclic loading (7 days, 3, 6, 9 and 12 months function simulation). The cast crowns were removed and the retention force was recorded. Results The highest initial retention force measured was for zinc-phosphate cement - conventional cementing (198,00±61,90 N), followed in descending order by zinc-phosphate cement - modified cementing technique (152,00±45,42 N), long term temporary cement - GC Fuji Temp LT (57,70±20,40 N), and semipermanent cement - Telio CS Cem Implant (56,10±18,68 N). After 12 months, the highest retention force measured was for zinc-phosphate cement - conventional cementing (88, 90±14, 45 N), followed by zinc-phosphate cement - modified cementing (48, 15±14,41N), semipermanent cement GC Fuji Temp LT (16,55±3,88 N) and Telio CS Cem Implant (15,55±5,52 N). Conclusions Zinc-phosphate cement - modified cementing technique and original semipermanent cements can be recommended for conditional permanent cementing of implant supported crowns. Clinical relevance The use of semipermanenet cements and zinc-phosphate cement - modified cementing technique provides a predictable retrievability of implant-supported crowns.
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Affiliation(s)
- Valentina Veselinović
- Department of Prosthodontics, Faculty of Medicine, University of Banja Luka, Bosnia and Herzegovina
| | - Saša Marin
- Department of Oral Surgery, Faculty of Medicine, University of Banja Luka, Bosnia and Herzegovina
| | - Zoran Tatić
- Clinic of Dental Medicine, Military Medical Academy, Belgrade, Serbia
| | - Nataša Trtić
- Department of Periodontology and Oral Medicine, Faculty of Medicine, University of Banja Luka, Bosnia and Herzegovina
| | - Olivera Dolić
- Department of Pediatric and Preventive Dentistry, Faculty of Medicine, University of Banja Luka, Bosnia and Herzegovina
| | - Tijana Adamović
- Department of Periodontology and Oral Medicine, Faculty of Medicine, University of Banja Luka, Bosnia and Herzegovina
| | - Radmila Arbutina
- Department of Restorative Dentistry, Faculty of Medicine, University of Banja Luka, Bosnia and Herzegovina
| | - Miodrag Šćepanović
- Department of Prosthodontics, School of Dental Medicine, University of Belgrade, Serbia
| | - Aleksandar Todorović
- Department of Prosthodontics, School of Dental Medicine, University of Belgrade, Serbia
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Müller L, Rauch A, Reissmann DR, Schierz O. Impact of cement type and abutment height on pull-off force of zirconia reinforced lithium silicate crowns on titanium implant stock abutments: an in vitro study. BMC Oral Health 2021; 21:592. [PMID: 34798850 PMCID: PMC8603517 DOI: 10.1186/s12903-021-01958-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Accepted: 11/05/2021] [Indexed: 12/04/2022] Open
Abstract
Background Pull-off forces of cement-retained zirconia reinforced lithium silicate (ZLS) in implant-supported single crowns on stock titanium abutments with respect to abutment height and implant cement were evaluated and compared. Methods Pull-off force of ZLS crowns on stock titanium abutments was evaluated concerning dental cement and abutment height. A total sample size of 64 stock abutments with heights of 3 mm (n = 32) and 5 mm (n = 32) was used. The ZLS crowns were cemented with four different types of cement (one temporary, two semi-permanent, and one permanent). After cementation, water storage, and thermocycling each sample was subjected to a pull-off test using a universal testing machine.
Results The temporary cement showed the least pull-off force regardless of abutment height (3/5 mm: means 6 N/23 N), followed by the semi-permanent methacrylate-infiltrated zinc oxide cement (28 N/55 N), the semi-permanent methacrylate-based cement (103 N/163 N), and the permanent resin composite cement (238 N/820 N). Results of all types of cement differed statistically significantly from each other (p ≤ .012). The type of implant cement has an impact on the pull-off force of ZLS crowns and titanium abutments. Conclusions Permanent cements present higher retention than semi-permanent ones, and temporary cements present the lowest values. The abutment height had a subordinate impact.
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Affiliation(s)
| | - Angelika Rauch
- Department of Prosthodontics and Materials Science, University of Leipzig, Liebigstrasse 12, 04107, Leipzig, Germany
| | - Daniel R Reissmann
- Department of Prosthetic Dentistry, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany
| | - Oliver Schierz
- Department of Prosthodontics and Materials Science, University of Leipzig, Liebigstrasse 12, 04107, Leipzig, Germany.
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Al-Thobity AM. Titanium Base Abutments in Implant Prosthodontics: A Literature Review. Eur J Dent 2021; 16:49-55. [PMID: 34794201 PMCID: PMC8890922 DOI: 10.1055/s-0041-1735423] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Implant abutments are essential components in restoring dental implants. Titanium base abutments were introduced to overcome issues related to existing abutments, such as the unesthetic appearance of titanium abutments and the low fracture strength of ceramic abutments. This study aimed to comprehensively review studies addressing the mechanical and clinical behaviors of titanium base abutments. A search was performed on PubMed/MEDLINE, Web of Science, Google Scholar, and Scopus databases to find articles that were published in English until December 2020 and that addressed the review purpose. A total of 33 articles fulfilled the inclusion criteria and were included for data extraction and review.
In vitro
studies showed that titanium base abutments had high fracture strength, adequate retention values, particularly with resin cement, and good marginal and internal fit. Although the clinical assessment of titanium base abutments was limited, they showed comparable performance with conventional abutments in short-term evaluation, especially in the anterior and premolar areas. Titanium base abutments can be considered a feasible treatment option for restoring dental implants, but long-term clinical studies are required for a better assessment.
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Affiliation(s)
- Ahmad M Al-Thobity
- Department of Substitutive Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
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10
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Johansson C, Håkansson A, Papia E. Bond strength between titanium and polymer-based materials adhesively cemented. Biomater Investig Dent 2021; 8:79-86. [PMID: 34212155 PMCID: PMC8218681 DOI: 10.1080/26415275.2021.1937182] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
The aim was to evaluate the bond strength between titanium and polymer-based materials for prosthetic restorations, cemented with different adhesive cement systems. Eight groups with 13 specimens in each group were included. Each specimen consisted of two parts: a cylinder of titanium resembling a titanium base, and a cylinder of one of two polymer-based materials Micro Filled Hybrid (MFH) or Telio CAD and cemented with one of four adhesive cement systems, namely Multilink Hybrid Abutment, Panavia V5, RelyX Ultimate and G-Cem LinkAce. The titanium was sandblasted with 50 µm Al2O3 and treated according to each cement manufacturer's recommendations. The polymer-based materials were pre-treated according to the manufacturer's instructions including sandblasting for MFH. After cementation, the groups were water stored for one day before thermocycling: 5000 cycles in 5–55 °C. A shear bond strength test was performed (crosshead speed 0.5 mm/min) and data was analysed with one-way ANOVA, Tukey's test. Telio CAD cemented with Panavia V5 and G-Cem LinkAce showed significantly lower bond strength compared to all other groups, due to spontaneous debonding. The highest numerical bond strength was found in the group of MFH cemented with RelyX Ultimate or with G-Cem LinkAce. Generally, the Telio CAD groups showed lower bond strength values than the MFH groups. The conclusions are that pre-treatment methods and choice of cement system are of importance for polymer-based materials for prosthetic restorations. The bond strength is adequate for provisional cementation irrespective of cement system when pre-treating by sandblasting, but cement dependent without sandblasting.
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Affiliation(s)
- Camilla Johansson
- Department of Materials Science and Technology, Faculty of Odontology, Malmö University, Malmö, Sweden
| | - Aleksandra Håkansson
- Department of Materials Science and Technology, Faculty of Odontology, Malmö University, Malmö, Sweden
| | - Evaggelia Papia
- Department of Materials Science and Technology, Faculty of Odontology, Malmö University, Malmö, Sweden
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11
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A straightforward technique for removing titanium bases from screw-retained monolithic implant-supported prostheses. J Prosthet Dent 2021; 128:837-838. [PMID: 34103149 DOI: 10.1016/j.prosdent.2021.05.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 05/06/2021] [Accepted: 05/07/2021] [Indexed: 11/23/2022]
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12
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Raee A, Alikhasi M, Nowzari H, Djalalinia S, Khoshkam V, Moslemi N. Comparison of peri-implant clinical outcomes of digitally customized and prefabricated abutments: A systematic review and meta-analysis. Clin Implant Dent Relat Res 2021; 23:216-227. [PMID: 33533116 DOI: 10.1111/cid.12982] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 01/14/2021] [Accepted: 01/15/2021] [Indexed: 11/26/2022]
Abstract
BACKGROUND Digitally customized abutments are increasingly used in contemporary implant prosthodontics. PURPOSE This systematic review and meta-analysis aimed at comparing the peri-implant clinical outcomes of digitally customized and prefabricated abutments. MATERIALS AND METHODS The search strategies included electronic databases (PubMed, Embase, Scopus, and Cochrane clinical trials database) and related journals up to September, 2020. A qualitative and quantitative synthesis was performed on data extracted from the included studies. RESULTS Three RCTs (number of patients = 120; number of dental implants = 120) and two prospective cohort studies (number of patients = 144; number of dental implants = 144) with one to three-year follow-up periods were included. The quantitative analyses did not demonstrate a significant difference between digitally customized and prefabricated abutments for peri-implant pocket depth (P = 0.62), plaque index (P = 0.67), bleeding on probing (P = 0.43), keratinized mucosa width (P = 0.75), and pink aesthetic score (P = 0.30) at one-year follow-up visit. The qualitative analyses for marginal bone level change, calculus accumulation, implant survival rate, implant success rate, white aesthetic score, and patient-reported outcomes did not demonstrate a significant difference between two groups during 1 to 3-year follow-up visits. CONCLUSION The current data do not provide evidence of significant differences between two abutment fabrication methods in terms of peri-implant clinical outcomes within short-term period (CRD42020170807).
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Affiliation(s)
- Amir Raee
- Department of Periodontology, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
| | - Marzieh Alikhasi
- Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Shirin Djalalinia
- Deputy of Research and Technology and Non-Communicable Diseases Research Center, Endocrinology and Metabolism Population Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Neda Moslemi
- Department of Periodontology, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
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Cardoso KB, Bergamo ETP, Cruz VDM, Ramalho IS, Lino LFDO, Bonfante EA. Three-dimensional misfit between Ti-Base abutments and implants evaluated by replica technique. J Appl Oral Sci 2020; 28:e20200343. [PMID: 33263647 PMCID: PMC7714261 DOI: 10.1590/1678-7757-2020-0343] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Accepted: 09/05/2020] [Indexed: 12/02/2022] Open
Abstract
An important factor affecting the biomechanical behavior of implant-supported reconstructions is the implant-abutment misfit.
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Affiliation(s)
- Karina Bergamo Cardoso
- Universidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Prótese e Periodontia, Bauru, Brasil
| | | | - Vitor De Moraes Cruz
- Universidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Dentística, Endodontia e Materiais Odontológicos, Bauru, Brasil
| | - Ilana Santos Ramalho
- Universidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Prótese e Periodontia, Bauru, Brasil
| | | | - Estevam Augusto Bonfante
- Universidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Prótese e Periodontia, Bauru, Brasil
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14
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T P Bergamo E, Zahoui A, Luri Amorin Ikejiri L, Marun M, Peixoto da Silva K, G Coelho P, Soares S, A Bonfante E. Retention of zirconia crowns to Ti-base abutments: effect of luting protocol, abutment treatment and autoclave sterilization. J Prosthodont Res 2020; 65:171-175. [PMID: 32938879 DOI: 10.2186/jpr.jpor_2019_537] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
PURPOSE To evaluate the influence of resin cement type, surface pretreatment and autoclave sterilization on the retention of Y-TZP crowns to Ti-base abutments. METHODS Y-TZP crowns were designed and milled to fit Ti-base abutments. Crowns were cemented using either a conventional resin cement (conventional) with a universal adhesive or a self-adhesive resin cement (self-adhesive), both following no surface pretreatment (No) or Ti-base abutment sandblasting (SB) (n=20/group). Half of the cemented samples were subjected to in-office autoclave sterilization. Pullout testing was performed in a universal testing machine at a speed of 1 mm/min until crown displacement. Data were statistically evaluated through a linear mixed model following post hoc comparisons by LSD test. RESULTS Pullout data as a function of cement type demonstrated higher retention for conventional relative to self-adhesive cement (p < 0.001). Ti-base sandblasting (SB) favored crown retentiveness over No pretreatment (p < 0.001). Sterilized crowns exhibited higher pullout values than non-sterile (p=0.036). All the two- and three-factor interaction analyses corroborated with the superior adhesive strength of conventional compared to self-adhesive cement (all, p < 0.011), as well as, SB relative to No pretreatment (all, p < 0.024). While autoclave sterilization maximized bond strength when self-adhesive cement (data collapsed over surface pretreatment, p < 0.050) and No pretreatment were evaluated (data collapsed over surface pretreatment, p < 0.013), no significant difference was observed for conventional resin cement (p=0.280) and SB (p=0.878) groups. CONCLUSIONS Conventional resin cement and/or Ti-base sandblasting increased Y-TZP crown retentiveness, with no significant influence of autoclave sterilization. Autoclaving increased retentiveness when self-adhesive cement and/or no Ti-base pretreatment were used.
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Affiliation(s)
- Edmara T P Bergamo
- Department of Prosthodontics and Periodontology, Bauru School of Dentistry, University of Sao Paulo, Bauru, SP
| | - Abbas Zahoui
- Department of Prosthodontics and Periodontology, Bauru School of Dentistry, University of Sao Paulo, Bauru, SP
| | - Larissa Luri Amorin Ikejiri
- Department of Prosthodontics and Periodontology, Bauru School of Dentistry, University of Sao Paulo, Bauru, SP
| | - Manoela Marun
- Department of Prosthodontics and Periodontology, Bauru School of Dentistry, University of Sao Paulo, Bauru, SP
| | - Kimberly Peixoto da Silva
- Department of Prosthodontics and Periodontology, Bauru School of Dentistry, University of Sao Paulo, Bauru, SP
| | - Paulo G Coelho
- Department of Biomaterials and Biomimetics, Department of Biomedical Engineering, New York University Tandon School of Engineering Brooklyn Hansjörg Wyss Department of Plastic Surgery
| | - Simone Soares
- Department of Prosthodontics and Periodontology, Bauru School of Dentistry, University of Sao Paulo, Bauru, SP
| | - Estevam A Bonfante
- Department of Prosthodontics and Periodontology, Bauru School of Dentistry, University of Sao Paulo, Bauru, SP
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Rohr N, Bertschinger N, Fischer J, Filippi A, Zitzmann NU. Influence of Material and Surface Roughness of Resin Composite Cements on Fibroblast Behavior. Oper Dent 2020; 45:528-536. [DOI: 10.2341/19-113-l] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/31/2019] [Indexed: 11/23/2022]
Abstract
Clinical Relevance
A well-polished cement surface increases the viability and spreading of gingival fibroblasts. The tested resin composite cements did not reveal any cytotoxic effects.
SUMMARY
Objective: This in vitro study aimed to investigate the effect of cement type and roughness on the viability and cell morphology of human gingival fibroblasts (HGF-1).
Methods and Materials: Discs of three adhesive (Panavia V5 [PV5], Multilink Automix [MLA], RelyX Ultimate [RUL] and three self-adhesive (Panavia SA plus [PSA], SpeedCem plus [SCP], RelyX Unicem [RUN]) resin composite cements were prepared with three different roughnesses using silica paper grit P180, P400, or P2500. The cement specimens were characterized by surface roughness and energy-dispersive X-ray spectroscopic mapping. A viability assay was performed after 24 hours of incubation of HGF-1 cells on cement specimens. Cell morphology was examined with scanning electron microscopy.
Results: The roughness of the specimens did not differ significantly among the different resin composite cements. Mean Ra values for the three surface treatments were 1.62 ± 0.34 μm for P180, 0.79 ± 0.20 μm for P400, and 0.17 ± 0.08 μm for P2500. HGF-1 viability was significantly influenced by the cement material and the specimens’ roughness, with the highest viability for PSA ≥ RUN = MLA ≥ SCP = PV5 > RUL (p<0.05) and for P2500 = P400 > P180 (p<0.001). Cell morphology did not vary among the materials but was affected by the surface roughness.
Conclusion: The composition of resin composite cements significantly affects the cell viability of HGF-1. Smooth resin composite cement surfaces with an Ra of 0.2–0.8 μm accelerate flat cell spreading and formation of filopodia.
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Ramalho IS, Bergamo ETP, Witek L, Coelho PG, Lopes ACO, Bonfante EA. Implant-abutment fit influences the mechanical performance of single-crown prostheses. J Mech Behav Biomed Mater 2019; 102:103506. [PMID: 31877515 DOI: 10.1016/j.jmbbm.2019.103506] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2019] [Revised: 10/21/2019] [Accepted: 10/21/2019] [Indexed: 01/05/2023]
Abstract
OBJECTIVES To evaluate the three-dimensional fit of abutments fabricated by the industry to those either milled or cast by a commercial laboratory and to correlate the implant-abutment connection fit with stress at fatigue failure of prostheses. Probability of survival (reliability) and fractography to characterize failure modes were also performed for cemented and screw-retained prostheses. METHODS One-hundred and twenty-six maxillary central incisor crowns were milled to restore implants and divided in 3 cemented and 3 screwed-retained groups (n = 21/each), as follows: [Digital-Sc]: milled one-piece monolithic abutment/crown; [TiB-Sc]: milled crowns cemented onto Ti-base abutments; [UCLA]: screw-retained crown using UCLA abutments; [Digital-Ce]: milled two-piece assembly comprised by screwed monolithic abutment and a cemented crown; [TiB-Ce]: milled coping cemented onto Ti-base abutments to receive a cemented crown; [UCLA-Ce]: UCLA abutments that received an overcast coping and a cemented crown. Implant-abutment volume misfit was assessed by micro-computed tomography using the silicone replica technique. Implant/crown systems were subjected to step-stress accelerated life testing (SSALT) in water. The use-level probability Weibull curves and reliability for a mission of 50,000 cycles at calculated stress at failure of 2,300, 3300 and 4300 MPa were plotted. Fractographic analysis was performed with scanning electron microscopy. Internal misfit was analyzed through one-way ANOVA following post-hoc comparisons by Tukey test (p < 0.05). Correlation between misfit volume and the stress at fatigue failure was assessed by Pearson test. RESULTS Similar misfit volumes were observed for TiB-Sc (0.458 mm3), TiB-Ce (0.461 mm3), UCLA (0.471 mm3) and UCLA-Ce (0.480 mm3), which were significantly lower than Digital-Sc (0.676 mm3) and Digital-Ce (0.633 mm3). The mean β values were: 1.68, 1.39, 1.48, 2.41, 2.27 and 0.71 for Digital-Sc, TiB-Sc, UCLA, Digital-Ce, TiB-Ce and UCLA-Ce, respectively, indicating that fatigue was an accelerating factor for failure of all groups. Higher stress at failure decreased the reliability of all groups, more significantly for screw compared to cement-retained groups, especially for Digital-Sc that demonstrated the lowest reliability. The failure mode was restricted to abutment screw fracture. A negative correlation was observed between misfit values and stress at failure (r = -0.302, p = 0.01). CONCLUSIONS Abutments milled by a commercial lab presented higher misfit compared to those provided by the industry and a moderate correlation was observed between higher misfit and lower stress at failure during fatigue. Probability of survival decreased at higher stress, especially for screw compared to cement-retained groups, and failures were confined to abutment screws.
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Affiliation(s)
- Ilana S Ramalho
- University of Sao Paulo - Bauru School of Dentistry, Department of Prosthodontics and Periodontology, Bauru, SP, Brazil.
| | - Edmara T P Bergamo
- University of Sao Paulo - Bauru School of Dentistry, Department of Prosthodontics and Periodontology, Bauru, SP, Brazil
| | - Lukasz Witek
- New York University, Department of Biomaterials and Biomimetics, New York, NY, USA
| | - Paulo G Coelho
- New York University, Department of Biomaterials and Biomimetics, New York, NY, USA
| | - Adolfo C O Lopes
- University of Sao Paulo - Bauru School of Dentistry, Department of Prosthodontics and Periodontology, Bauru, SP, Brazil
| | - Estevam A Bonfante
- University of Sao Paulo - Bauru School of Dentistry, Department of Prosthodontics and Periodontology, Bauru, SP, Brazil
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