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Wada T, Koizumi H, Hiraba H, Hanawa T, Matsumura H, Yoneyama T. Effect of luting system with acidic primers on the durability of bonds with Ti-15Mo-5Zr-3Al titanium alloy and its component metals. Dent Mater J 2023. [PMID: 36935125 DOI: 10.4012/dmj.2022-184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
Abstract
This study evaluated the effect of luting system with acidic primers on the durability of bonds with Ti-15Mo-5Zr-3Al titanium alloy (Ti-15Mo-5Zr-3Al) and its component metals. Adherend metals were Ti-15Mo-5Zr-3Al, Ti, Mo, Zr, and Al. Four primers were evaluated as adhesion promoters: Alloy Primer (ALP), Estenia Opaque Primer (EOP), M. L. Primer (MLP), and Super Bond liquid (SBL). An acrylic resin was used as the luting material. Pre- and post-thermocycling shear bond strength was determined to evaluate the bonding durability, and the results were compared using non-parametric statistical analyses (n=11/group). The post-thermocycling bond strength in MPa (median) associated with ALP, EOP, MLP, and SBL were 18.8, 19.8, 4.1, and 0.8, respectively, for Ti-15Mo-5Zr-3Al. The results showed that two primers containing 10-methacryloyloxydecyl dihydrogen phosphate (MDP) were effective for the durability of bonding of Ti-15Mo-5Zr-3Al to the resin. MDP enhanced the bonding durability of the resin bonded to either Ti, Zr, or Al.
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Affiliation(s)
- Takeshi Wada
- Division of Applied Oral Sciences, Nihon University Graduate School of Dentistry
| | - Hiroyasu Koizumi
- Department of Dental Materials, Nihon University School of Dentistry.,Division of Biomaterials Science, Dental Research Center, Nihon University School of Dentistry
| | - Haruto Hiraba
- Department of Fixed Prosthodontics, Nihon University School of Dentistry.,Division of Advanced Dental Treatment, Dental Research Center, Nihon University School of Dentistry
| | - Takao Hanawa
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU)
| | - Hideo Matsumura
- Department of Fixed Prosthodontics, Nihon University School of Dentistry
| | - Takayuki Yoneyama
- Department of Dental Materials, Nihon University School of Dentistry.,Division of Biomaterials Science, Dental Research Center, Nihon University School of Dentistry
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Koizumi H, Takeuchi Y, Imai H, Kawai T, Yoneyama T. Application of titanium and titanium alloys to fixed dental prostheses. J Prosthodont Res 2019; 63:266-270. [DOI: 10.1016/j.jpor.2019.04.011] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2019] [Revised: 04/18/2019] [Accepted: 04/22/2019] [Indexed: 10/26/2022]
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Koizumi H, Ishii T, Okazaki T, Kaketani M, Matsumura H, Yoneyama T. Castability and mechanical properties of Ti-15Mo-5Zr-3Al alloy in dental casting. J Oral Sci 2018; 60:285-292. [PMID: 29925713 DOI: 10.2334/josnusd.17-0280] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
The castability, mechanical properties, and fracture characteristics of Ti-15Mo-5Zr-3Al alloy were compared with those of Ti-6Al-7Nb alloy and pure titanium (CP Ti) for application of this β-type titanium alloy in cast dental prostheses. Cast specimens were prepared with a centrifugal casting machine. A tensile test was performed according to ISO standard 22674. The castability index for Ti-15Mo-5Zr-3Al was lower than those for Ti-6Al-7Nb and CP Ti. The tensile strength of Ti-15Mo-5Zr-3Al was 852 MPa, which was lower than that of Ti-6Al-7Nb and higher than that of CP Ti. The proof strength of Ti-15Mo-5Zr-3Al was 799 MPa, which was comparable to that of Ti-6Al-7Nb and higher than that of CP Ti. The elastic modulus of Ti-15Mo-5Zr-3Al was 81.0 GPa, which was lower than the values for Ti-6Al-7Nb and CP Ti. Elongation of Ti-15Mo-5Zr-3Al was 5.1%, which was comparable to that of Ti-6Al-7Nb and less than that of CP Ti. The shape of the fractured segment was narrower for Ti-15Mo-5Zr-3Al than for Ti-6Al-7Nb and CP Ti. The deformation characteristics of Ti-15Mo-5Zr-3Al may result in decreased stress relative to increased strain during plastic deformation in the stress-strain diagram. In conclusion, Ti-15Mo-5Zr-3Al alloy has a low elastic modulus and exhibits limited ductile plastic deformation in cast dental prostheses.
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Affiliation(s)
- Hiroyasu Koizumi
- Department of Fixed Prosthodontics, Nihon University School of Dentistry.,Division of Advanced Dental Treatment, Dental Research Center, Nihon University School of Dentistry
| | - Takaya Ishii
- Department of Fixed Prosthodontics, Nihon University School of Dentistry.,Department of Oral and Maxillofacial Surgery, Juntendo Tokyo Koto Geriatric Medical Center
| | - Tomoyo Okazaki
- Division of Applied Oral Sciences, Nihon University Graduate School of Dentistry
| | - Masahiro Kaketani
- Department of Dental Materials, Nihon University School of Dentistry.,Division of Biomaterials Science, Dental Research Center, Nihon University School of Dentistry
| | - Hideo Matsumura
- Department of Fixed Prosthodontics, Nihon University School of Dentistry.,Division of Advanced Dental Treatment, Dental Research Center, Nihon University School of Dentistry
| | - Takayuki Yoneyama
- Department of Dental Materials, Nihon University School of Dentistry.,Division of Biomaterials Science, Dental Research Center, Nihon University School of Dentistry
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Mehl CJ, Okano N, Ludwig K, Kern M. Retention of bonded titanium copings fixed to implant abutments. J Prosthet Dent 2015; 115:26-34. [PMID: 26548873 DOI: 10.1016/j.prosdent.2015.09.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Revised: 09/19/2015] [Accepted: 09/22/2015] [Indexed: 11/29/2022]
Abstract
STATEMENT OF PROBLEM Conical abutments can be laser welded to the abutment base to compensate for differing implant axes. As laser welding requires expensive equipment, alternative methods for bonding the conical abutment part with the abutment base should be considered. PURPOSE The purpose of this in vitro study was to evaluate the retention of Ti-6Al-7Nb copings bonded adhesively to Ti-6Al-7Nb abutments and to compare it with the stability achieved by laser welding. MATERIAL AND METHODS A total of 104 two-part Ti-6Al-7Nb specimens were prepared and divided into 13 groups with 8 specimens each. In this 2-part study, 3 luting resins (Panavia F 2.0 [PF]; Multilink Automix [MA]; Superbond C&B [SB]) were used with or without metal priming (PR). The laser welding group (LW) served as the control. After storage for 1 or 150 days (150 days with thermal cycling [TC]), push-out retention and welded joint stability were tested. The data were analyzed with ANOVA and the Tukey HSD multiple comparison tests. RESULTS The choice of resin, thermal cycling, and metal priming had a significant effect on resin push-out retention. LW provided the strongest retention, followed by PF, MA, and SB. For PF and SB, TC decreased retention. PR did not lead to higher retention but provided better bonding stability when TC was applied. CONCLUSIONS The retention values suggest that considering the maximum mastication forces, resin bonding is an appropriate substitute for the laser welding method.
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Affiliation(s)
- Christian J Mehl
- Private practice, Munich, Germany; and Research Associate, Department of Prosthodontics, Propaedeutics, and Dental Materials, Christian-Albrechts University at Kiel, Kiel, Germany.
| | - Nobuhiko Okano
- Former Associate Professor, Removable Partial Prosthodontics, Graduate School, Tokyo Medical and Dental University, Tokyo Medical and Dental University, Tokyo, Japan
| | - Klaus Ludwig
- Professor Emeritus, Department of Prosthodontics, Propaedeutics, and Dental Materials, Christian-Albrechts University at Kiel, Kiel, Germany
| | - Matthias Kern
- Professor and chair, Department of Prosthodontics, Propaedeutics, and Dental Materials, Christian-Albrechts University at Kiel, Kiel, Germany
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Almilhatti HJ, Neppelenbroek KH, Vergani CE, Machado AL, Pavarina AC, Giampaolo ET. Adhesive bonding of resin composite to various titanium surfaces using different metal conditioners and a surface modification system. J Appl Oral Sci 2014; 21:590-6. [PMID: 24473727 PMCID: PMC3891285 DOI: 10.1590/1679-775720130255] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Objective This study evaluated the effect of three metal conditioners on the shear bond
strength (SBS) of a prosthetic composite material to cpTi grade I having three
surface treatments. Material and Methods One hundred sixty eight rivet-shaped specimens (8.0x2.0 mm) were cast and
subjected to polishing (P) or sandblasting with either 50 mm (50SB) or 250 mm
(250SB) Al2O3. The metal conditioners Metal Photo Primer
(MPP), Cesead II Opaque Primer (OP), Targis Link (TL), and one surface
modification system Siloc (S), were applied to the specimen surfaces, which were
covered with four 1-mm thick layers of resin composite. The resin layers were
exposed to curing light for 90 s separately. Seven specimens from each
experimental group were stored in water at 37ºC for 24 h while the other 7
specimens were subjected to 5,000 thermal cycles consisting of water baths at 4ºC
and 60ºC (n=7). All specimens were subjected to SBS test (0.5 mm/min) until
failure occurred, and further 28 specimens were analyzed using scanning electron
microscope (SEM) and X-ray energy-dispersive spectroscopy (EDS). Data were
analyzed by 3-way ANOVA followed by post-hoc Tukey's test
(α=0.05). Results On 50SB surfaces, OP groups showed higher SBS means than MPP (P<0.05), while no
significant difference was found among OP, S, and TL groups. On 250SB surfaces, OP
and TL groups exhibited higher SBS than MPP and S (P<0.05). No significant
difference in SBS was found between OP and TL groups nor between MPP and S groups.
The use of conditioners on 250SB surfaces resulted in higher SBS means than the
use of the same products on 50SB surfaces (P<0.05). Conclusion Sandblasting associated with the use of metal conditioners improves SBS of resin
composites to cpTi.
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Affiliation(s)
| | | | - Carlos Eduardo Vergani
- Univ. Estadual Paulista, Araraquara Dental School, Department of Dental Materials and Prosthodontics, AraraquaraSP, Brazil
| | - Ana Lúcia Machado
- Univ. Estadual Paulista, Araraquara Dental School, Department of Dental Materials and Prosthodontics, AraraquaraSP, Brazil
| | - Ana Cláudia Pavarina
- Univ. Estadual Paulista, Araraquara Dental School, Department of Dental Materials and Prosthodontics, AraraquaraSP, Brazil
| | - Eunice Teresinha Giampaolo
- Univ. Estadual Paulista, Araraquara Dental School, Department of Dental Materials and Prosthodontics, AraraquaraSP, Brazil
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Kochi M, Koizumi H, Murakami M, Kikuchi H, Matsumura H, Yoneyama T. Hardness and microstructure of Ti-15Mo-5Zr-3Al alloy for dental casting. Acta Odontol Scand 2011; 69:328-33. [PMID: 21426269 DOI: 10.3109/00016357.2011.568963] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE The hardness and microstructures of Ti-15Mo-5Zr-3Al alloy castings were investigated for application to dental cast prostheses. MATERIALS AND METHODS Cast specimens of Ti-15Mo-5Zr-3Al alloy, Ti-6Al-7Nb alloy and CP Ti were prepared using a centrifugal-type casting machine and a magnesia-based investment material. The hardness of the cross-sections of the cast specimens were measured. The microstructure of the castings was observed using an optical microscope and was then analyzed by X-ray diffractometry. RESULTS AND CONCLUSIONS The hardness of Ti-15Mo-5Zr-3Al alloy at the inner part of the castings was 361 Hv, while the hardnesses of Ti-6Al-7Nb alloy and CP Ti were 384 and 269 Hv, respectively. The thickness of the surface hardened layer for Ti-15Mo-5Zr-3Al alloy was thinner than those for Ti-6Al-7Nb alloy and CP Ti. The microstructure of the Ti-15Mo-5Zr-3Al alloy casting was confirmed to be β phase.
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Affiliation(s)
- Mamiko Kochi
- Division of Applied Oral Sciences, Nihon University School of Dentistry, Chiyoda-ku, Tokyo, Japan
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Microtensile bond strength of resin-based composites to Ti–6Al–4V. Dent Mater 2009; 25:655-61. [PMID: 19128826 DOI: 10.1016/j.dental.2008.11.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2008] [Revised: 11/23/2008] [Accepted: 11/26/2008] [Indexed: 11/20/2022]
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Ishii T, Koizumi H, Tanoue N, Naito K, Yamashita M, Matsumura H. Effect of alumina air-abrasion on mechanical bonding between an acrylic resin and casting alloys. J Oral Sci 2009; 51:161-6. [PMID: 19550081 DOI: 10.2334/josnusd.51.161] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Affiliation(s)
- Takaya Ishii
- Division of Applied Oral Sciences, Nihon University Graduate School of Dentistry, Tokyo, Japan
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Matsumura H, Mori S, Tanoue N. Fabrication of a maxillary posterior fixed partial denture with a type 4 gold alloy and a dual-polymerizing indirect composite. J Oral Sci 2008; 50:113-6. [PMID: 18403895 DOI: 10.2334/josnusd.50.113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
The aim of the present study was to design and fabricate a maxillary posterior fixed partial denture (FPD) made of a type 4 gold alloy and an indirect composite. Unlike the conventional framework design of a resin veneered restoration, cut-back was extended approximately 1/4 to 1/3 width in the occlusal table of the buccal cusp. Multiple retentive beads 150-200 mum in diameter were placed on the metal surface to be veneered. The gold alloy was cast in a cristobalite mold using a centrifugal casting machine. The cut surface with the retentive beads was air-abraded with alumina, and a priming agent (Alloy Primer) that contained triazine dithione monomer (VTD) was applied. A tooth-colored veneer was then fabricated with a highly loaded light- and heat-cured composite material (Estenia). This design and procedure can be applied as a standardized laboratory technique for fabrication of maxillary posterior restorations and FPDs.
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Affiliation(s)
- Hideo Matsumura
- Department of Fixed Prosthodontics, Nihon University School of Dentistry, Tokyo, Japan.
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ISHII T, KOIZUMI H, YONEYAMA T, TANOUE N, ISHIKAWA Y, MATSUMURA H. Comparative Evaluation of Thione and Phosphate Monomers on Bonding Gold Alloy and Ti-6Al-7Nb Alloy with Tri-n-butylborane initiated Resin. Dent Mater J 2008; 27:56-60. [DOI: 10.4012/dmj.27.56] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Tanaka K, Kimoto K, Sawada T, Toyoda M. Shear bond strength of veneering composite resin to titanium nitride coating alloy deposited by radiofrequency sputtering. J Dent 2006; 34:277-82. [PMID: 16153766 DOI: 10.1016/j.jdent.2005.07.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2004] [Revised: 07/05/2005] [Accepted: 07/06/2005] [Indexed: 11/21/2022] Open
Abstract
OBJECTIVE The success of dental restorations utilizing composite resin over cast alloy has been variable and affected by micro-leakage. The purpose of this study was to investigate the shear bond strength between a composite resin and cast dental alloy coated with a layer of titanium nitride (TiN). METHODS Cast disk specimens made of Au-Pd-Ag alloy were randomly divided into four groups. The first group was left uncoated as a control while one group was coated with a metal conditioner, and the other two were coated with TiN at either 200 or 500 W with a radiofrequency magnetron sputtering system. Each group was then bonded to one of two types of light-activated composite resin material. Shear bond strengths were tested and compared for each specimen. The bond strength of each group was analyzed by 2-way ANOVA and by post hoc multiple comparison tests (Fisher's PLSD). RESULTS As the interaction among groups was not significant (p=0.27) by 2-way ANOVA, TiN coated groups were found to have improved shear bond strength compared with non-coated groups without metal conditioner for both resin composite materials by multiple comparison tests. Furthermore, TiN coating is significantly stronger than non-coated groups with metal conditioner for one of the two resin composite materials examined (p<0.01). CONCLUSIONS The results suggested that metal surface modification by coated TiN represents a technique that may significantly improve the bond between the Au-Pd-Ag alloy and veneering resin composite.
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Affiliation(s)
- Kinya Tanaka
- Department of Oral & Maxillofacial Rehabilitation, Kanagawa Dental College, 82 Inaoka-cho, Yokosuka, Kanagawa 238-8580, Japan
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Koizumi H, Furuchi M, Tanoue N, Yanagida H, Yoneyama T, Matsumura H. Bond Strength to Primed Ti-6Al-7Nb Alloy of Two Acrylic Resin Adhesives. Dent Mater J 2006; 25:286-90. [PMID: 16916231 DOI: 10.4012/dmj.25.286] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This study aimed to evaluate the bonding behavior of two acrylic resin adhesives joined to titanium-aluminum-niobium (Ti-6Al-7Nb) alloy primed with two metal conditioners. Cast Ti-6Al-7Nb alloy disks were air-abraded with alumina and bonded with six combinations of two resin adhesives (Super-Bond C&B and Multi Bond) and three surface conditions (Alloy Primer, M.L. Primer, and unprimed control). Shear bond strengths were determined both before and after 20,000 thermal cycles. The tri-n-butylborane initiated Super-Bond C and B resin exhibited greater bond strength than the BPO-amine initiated Multi-Bond resin. Both the Alloy Primer with a hydrophobic phosphate and the M.L. Primer with a phosphonoacetate effectively improved the 24-hour bond strength of Multi-Bond resin as well as the post-thermocycling bond strength of Super-Bond C and B resin.
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Affiliation(s)
- Hiroyasu Koizumi
- Department of Crown and Bridge Prosthodontics, Nihon University School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan.
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Shimizu H, Kurtz KS, Tachii Y, Takahashi Y. Use of metal conditioners to improve bond strengths of autopolymerizing denture base resin to cast Ti-6Al-7Nb and Co-Cr. J Dent 2005; 34:117-22. [PMID: 15994000 DOI: 10.1016/j.jdent.2005.05.002] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2004] [Accepted: 05/11/2005] [Indexed: 11/21/2022] Open
Abstract
OBJECTIVE The shear bond strengths of an autopolymerizing denture base resin to cast Ti-6Al-7Nb and Co-Cr alloys using three metal conditioners were investigated. METHODS Ti-6Al-7Nb alloy and Co-Cr alloy discs were cast. The disc surfaces were air-abraded with 50 microm alumina particles and treated with three metal conditioners (Alloy Primer; Cesead II Opaque Primer; Metal Primer II). An autopolymerizing denture base resin was applied on the discs within a hole punched in a piece of sticky tape and a Teflon ring to define the bonding area. All specimens were immersed in 37 degrees C water for 24 h. Half of the specimens were thermocycled up to 20,000 cycles. The shear bond strengths were determined at a crosshead speed of 1.0 mm/min. RESULTS Specimens treated with the three metal conditioners had significantly (p<0.05) improved shear bond strengths of the autopolymerizing denture base resin to both Ti-6Al-7Nb and Co-Cr. Although the bond strengths of the bonded Ti-6Al-7Nb specimens were higher than those of the Co-Cr alloy before thermocycling, the decrease in the bond strength of Ti-6Al-7Nb was considerably greater than that of the Co-Cr after thermocycling. CONCLUSION Significant improvements in bond strength of the autopolymerizing denture base resin to cast Ti-6Al-7Nb alloy and Co-Cr alloy were achieved through the application of Alloy Primer, Cesead II Opaque Primer and Metal Primer II. The bond durability to Ti-6Al-7Nb alloy was inferior to that to Co-Cr.
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Affiliation(s)
- Hiroshi Shimizu
- Division of Removable Prosthodontics, Department of Oral Rehabilitation, Fukuoka Dental College, 2-15-1 Tamura Sawara-ku, Fukuoka 814-0193, Japan.
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Aridome K, Yamazaki M, Baba K, Ohyama T. Bending properties of strengthened Ti-6Al-7Nb alloy major connectors compared to Co-Cr alloy major connectors. J Prosthet Dent 2005; 93:267-73. [PMID: 15775928 DOI: 10.1016/j.prosdent.2004.12.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
STATEMENT OF PROBLEM Although Ti-6Al-7Nb alloy has several excellent mechanical properties, its poor rigidity has limited its clinical use as a material for the fabrication of a removable partial denture (RPD) major connector. PURPOSE The purpose of this study was to develop and evaluate strengthening designs of Ti-6Al-7Nb RPD major connectors in an effort to increase rigidity. MATERIAL AND METHODS Four strengthening designs of Ti-6Al-7Nb alloy major connectors were developed using finite element analysis modeling: wide, thick, thick at the middle, and thick at the anterior and posterior borders. The designs had similar rigidity values to a conventional Co-Cr alloy major connector, as measured by the maximum deformation when a simulated load was applied. Next, 30 Kennedy Class II maxillary RPD specimens, using 6 different major connector designs (n = 5), were fabricated. These 6 designs included Ti-6Al-7Nb alloy RPDs with 4 different strengthening designs, a Ti-6Al-7Nb alloy RPD without strengthening designs, and a conventional Co-Cr alloy RPD as a control. The rigidity of the RPDs was evaluated by measuring strains on the major connector and force on the intaglio surface of a denture base under a 30 N loading condition. The data obtained from the 6 different RPD designs were compared using a repeated measures analysis of variance and the Bonferroni correction (alpha=.05). RESULTS The strains on the major connectors and the force on the denture bases measured from the Ti-6Al-7Nb RPD without strengthening designs were significantly larger than those of the standard Co-Cr alloy RPD. The strains measured from the 4 strengthening designs were not significantly larger than those of the Co-Cr alloy RPD. CONCLUSION The results suggest that the strengthening designs tested may improve the rigidity of the Ti-6Al-7Nb alloy major connectors and, hence, may promote clinical application for RPDs.
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Affiliation(s)
- Kumiko Aridome
- Removable Prosthodontics/Department of Masticatory Function Rehabilitation, Division of Oral Health Sciences/Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima Bunkyo-ku, Tokyo 113-8549, Japan.
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Yanagida H, Taira Y, Atsuta M. Effects of a fluoride etchant on resin bonding to titanium-aluminum-niobium alloy. Eur J Oral Sci 2004; 112:384-7. [PMID: 15279659 DOI: 10.1111/j.1600-0722.2004.00148.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This investigation was carried out in order to evaluate ammonium hydrogen fluoride (AHF) and cupric chloride (CC) as components of a metal etchant. The surface of cast titanium-aluminum-niobium (Ti-6Al-7Nb) was air-abraded with alumina, etched for 10 s, and rinsed with water. A phosphate or a thiophosphate primer was applied to the bonding area, and an acrylic rod was bonded to the specimen with a tri-n-butylborane-initiated self-curing luting agent. Shear bond strengths were determined after thermocycling (4 degrees C and 60 degrees C) for 10,000 cycles. The average bond strength was significantly influenced by thermocycling, AHF, and primer, but was not influenced by CC. The maximum average bond strengths were obtained when the etchant consisted of 5mass% AHF, with and without 0.3mass% CC. Microphotographs showed that numerous micropits were created on the etched surface, suggesting increased micromechanical retention. In conclusion, chemical etching with 5mass% AHF significantly improved the durability of resin bonding to Ti-6Al-7Nb.
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Affiliation(s)
- Hiroaki Yanagida
- Division of Fixed Prosthodontics and Oral Rehabilitation, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
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