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  1. Book: Orthodontic materials

    Brantley, William A.

    scientific and clinical aspects

    2001  

    Author's details William A. Brantley
    Keywords Orthodontic Appliances ; Dental Bonding ; Dental Materials / chemistry ; Kieferorthopädisches Gerät ; Werkstoffkunde
    Subject Materialkunde ; Werkstoffwissenschaften ; Werkstofftechnik ; Materialwissenschaft ; Werkstoffwissenschaft ; Kieferorthopädischer Apparat ; Kieferorthopädie ; Orthodontisches Gerät ; Orthodontische Apparatur ; Kieferorthopädisches Behandlungsgerät
    Language English
    Size X, 310 S. : Ill., graph. Darst.
    Publisher Thieme
    Publishing place Stuttgart u.a.
    Publishing country Germany
    Document type Book
    Note Literaturangaben
    HBZ-ID HT013009169
    ISBN 3-13-125281-2 ; 0-86577-929-5 ; 978-3-13-125281-4 ; 978-0-86577-929-7
    Database Catalogue ZB MED Medicine, Health

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  2. Article ; Online: Evolution, clinical applications, and prospects of nickel-titanium alloys for orthodontic purposes.

    Brantley, William A

    Journal of the World federation of orthodontists

    2020  Volume 9, Issue 3S, Page(s) S19–S26

    Abstract: This review article presents an evolution of the nickel-titanium wires for orthodontics, following their introduction by the pioneering studies of Andreasen. The original nonsuperelastic wires were followed by the introduction of superelastic Japanese ... ...

    Abstract This review article presents an evolution of the nickel-titanium wires for orthodontics, following their introduction by the pioneering studies of Andreasen. The original nonsuperelastic wires were followed by the introduction of superelastic Japanese NiTi wire by Miura and colleagues and Chinese NiTi wire by Burstone and colleagues. Subsequently, new nickel-titanium wires with true shape memory in the oral environment were introduced. Manufacturers have marketed special heat-treated wires with variable force delivery at different positions along the archwire. Ion implantation and other surface modification techniques have been used by manufacturers to reduce in vivo nickel release from the nickel-titanium wires, provide a more esthetic appearance, decrease friction, and improve corrosion resistance. The use of several research techniques to provide supporting information about the structures and transformations, mechanical properties, and clinical failure for the different types of the nickel-titanium wires are summarized. The evolution of the ADA/ISO standard for evaluation of these wires is also described. The closing section focuses on the use of surface modification and special coatings for the nickel-titanium wires, a major recent and ongoing area of active research.
    MeSH term(s) Materials Testing ; Nickel ; Orthodontic Wires ; Surface Properties ; Titanium
    Chemical Substances titanium nickelide (12035-60-8) ; Nickel (7OV03QG267) ; Titanium (D1JT611TNE)
    Language English
    Publishing date 2020-09-30
    Publishing country United States
    Document type Journal Article ; Review
    ISSN 2212-4438
    ISSN (online) 2212-4438
    DOI 10.1016/j.ejwf.2020.08.005
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Electrochemical impedance spectroscopy study of corrosion characteristics of palladium-silver dental alloys.

    Sun, Desheng / Frankel, Gerald S / Brantley, William A / Heshmati, Reza H / Johnston, William M

    Journal of biomedical materials research. Part B, Applied biomaterials

    2021  Volume 109, Issue 11, Page(s) 1777–1786

    Abstract: Electrochemical impedance spectroscopy (EIS) has been used to obtain insight into corrosion processes for three Pd-Ag alloys, and compare their behavior with an Au-Pd alloy. Five specimens of each alloy received clinically-appropriate simulated porcelain- ...

    Abstract Electrochemical impedance spectroscopy (EIS) has been used to obtain insight into corrosion processes for three Pd-Ag alloys, and compare their behavior with an Au-Pd alloy. Five specimens of each alloy received clinically-appropriate simulated porcelain-firing heat treatment. EIS testing was performed at ambient temperature, using 0.09% NaCl, 0.9% NaCl and Fusayama solutions. EIS data are presented as Bode plots. At the open-circuit potential (OCP), the data fit a modified Randles equivalent electrical circuit with a constant phase element (CPE), and the charge-transfer resistance (R
    MeSH term(s) Corrosion ; Dental Alloys/chemistry ; Dielectric Spectroscopy ; Materials Testing ; Palladium/chemistry ; Silver/chemistry
    Chemical Substances Dental Alloys ; Silver (3M4G523W1G) ; Palladium (5TWQ1V240M)
    Language English
    Publishing date 2021-04-04
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ZDB-ID 2099992-6
    ISSN 1552-4981 ; 1552-4973 ; 0021-9304
    ISSN (online) 1552-4981
    ISSN 1552-4973 ; 0021-9304
    DOI 10.1002/jbm.b.34837
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: ICP-MS measurements of elemental release from two palladium alloys into a corrosion testing medium for different solution volumes and agitation conditions.

    Tufekçi, Eser / Mitchell, John C / Olesik, John W / Brantley, William A / Monaghan, Peter / Johnston, William M

    The Journal of prosthetic dentistry

    2021  Volume 128, Issue 3, Page(s) 522–528

    Abstract: Statement of problem: The in vivo release of Pd from palladium alloys into the oral environment and sensitivity reactions by patients has been of concern. However, little information is available about the variation in elemental release from different ... ...

    Abstract Statement of problem: The in vivo release of Pd from palladium alloys into the oral environment and sensitivity reactions by patients has been of concern. However, little information is available about the variation in elemental release from different palladium alloys.
    Purpose: The purpose of this in vitro study was to compare the elemental release into a corrosion-testing medium from a high-palladium alloy (Freedom Plus, 78Pd-8Cu-5Ga-6In-2Au) and a Pd-Ag alloy (Super Star, 60Pd-28Ag-6In-5Sn) under different conditions.
    Material and methods: Alloys were cast into Ø12×1-mm-thick disks, subjected to simulated porcelain-firing heat treatment, polished, and ultrasonically cleaned in ethanol. Three specimens of each alloy were immersed for 700 hours in a solution for in vitro corrosion testing (ISO Standard 10271) that was maintained at 37 °C. Two solution volumes (125 mL and 250 mL) were used, and the solutions were subjected to either no agitation or agitation. Elemental compositions of the solutions were analyzed by using inductively coupled plasma-mass spectroscopy (ICP-MS). Concentrations of released elements from each alloy for the 2 solution volumes and agitation conditions were compared by using the restricted maximum likelihood estimation method with a 4-way repeated-measures ANOVA, the Satterwhite degrees of freedom method, a lognormal response distribution, and the covariance structure of compound symmetry.
    Results: For the 4 combinations of solution volume and agitation conditions, the mean amount of palladium released was 3 orders of magnitude less for the Pd-Ag alloy (0.009 to 0.017 μg/cm
    Conclusions: The relative amounts of released elements from each alloy were not proportional to the relative amounts in the composition. The amounts of Pd and Ga released from the Pd-Cu-Ga alloy were consistent with the breakdown of a Pd
    MeSH term(s) Alloys ; Copper/chemistry ; Corrosion ; Dental Alloys/chemistry ; Dental Porcelain ; Ethanol ; Gallium/chemistry ; Gold Alloys/chemistry ; Humans ; Materials Testing ; Palladium/chemistry
    Chemical Substances Alloys ; Dental Alloys ; Gold Alloys ; Dental Porcelain (12001-21-7) ; Ethanol (3K9958V90M) ; Palladium (5TWQ1V240M) ; Copper (789U1901C5) ; Gallium (CH46OC8YV4)
    Language English
    Publishing date 2021-02-15
    Publishing country United States
    Document type Journal Article
    ZDB-ID 218157-5
    ISSN 1097-6841 ; 0022-3913
    ISSN (online) 1097-6841
    ISSN 0022-3913
    DOI 10.1016/j.prosdent.2020.12.038
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: A study of fracture loads and fracture characteristics of teeth.

    Sheen, Chang-Yong / Dong, Jin-Keun / Brantley, William Arthur / Han, David Seungho

    The journal of advanced prosthodontics

    2019  Volume 11, Issue 3, Page(s) 187–192

    Abstract: Purpose: The purpose of this : Materials and methods: One hundred and forty natural teeth were taken from mandibles and maxillas of patients. There were 14 groups of teeth with 10 teeth in each group (5 males and 5 females). Each specimen was ... ...

    Abstract Purpose: The purpose of this
    Materials and methods: One hundred and forty natural teeth were taken from mandibles and maxillas of patients. There were 14 groups of teeth with 10 teeth in each group (5 males and 5 females). Each specimen was embedded in resin and mounted on a positioning jig, with the long axis of the tooth at an inclined angle of 30 degrees. A universal testing machine was used to measure the compression load at which fracture of the tooth specimen occurred; loads were applied on the incisal edge and/or functional cusp.
    Results: The mean fracture load for the mandibular first premolar was the highest (2002 N) of all the types of teeth, while the mean fracture load for the maxillary first premolar was the lowest (525 N). Mean fracture loads for the mandibular and maxillary incisors, and the first and second maxillary premolars, had significantly lower values compared to the other types of teeth. The mean fracture load for the teeth from males was significantly greater than that for the teeth from females. There was an inverse relationship between age and mean fracture load, in which older teeth had lower fracture loads compared to younger teeth.
    Conclusion: The mean fracture loads for natural teeth were significantly different, with dependence on tooth position and the sex and age of the individual.
    Language English
    Publishing date 2019-06-26
    Publishing country Korea (South)
    Document type Journal Article
    ZDB-ID 2575831-7
    ISSN 2005-7814 ; 2005-7806
    ISSN (online) 2005-7814
    ISSN 2005-7806
    DOI 10.4047/jap.2019.11.3.187
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Fracture analysis of monolithic CAD-CAM crowns.

    Kashkari, Afnan / Yilmaz, Burak / Brantley, William A / Schricker, Scott R / Johnston, William M

    Journal of esthetic and restorative dentistry : official publication of the American Academy of Esthetic Dentistry ... [et al.

    2019  Volume 31, Issue 4, Page(s) 346–352

    Abstract: Purpose: The aim of this study was to compare the integrity of zirconia, lithium disilicate, and zirconia-reinforced lithium silicate CAD-CAM crowns after being subjected to cyclic loading and then subjected to static loading until fracture.: Material ...

    Abstract Purpose: The aim of this study was to compare the integrity of zirconia, lithium disilicate, and zirconia-reinforced lithium silicate CAD-CAM crowns after being subjected to cyclic loading and then subjected to static loading until fracture.
    Material and methods: Zirconia (Zirkonzahn), lithium disilicate (LDS, Ivoclar Vivadent AG), and zirconia-reinforced lithium silicate glass ceramic (ZLS) (Vita Suprinity, Vita Zahnfabrik) monolithic crowns were milled (n = 6). The crowns were bonded using composite resin cements and subjected to cyclic loading under wet conditions. Three specimens from each group were loaded for 10 000 cycles, and the other three specimens were loaded for 50 000 cycles with 250 N. Specimens were subjected to loading until fracture. Load-to-fracture values were analyzed with 2-way (ANOVA) and Tukey-Kramer post hoc test (α = 0.05). Specimens from each group were examined using an SEM.
    Results: Mean load-to-fracture values among materials were significantly different from each other (P < 0.05). No significant effect of the number of cycles was found on the load-to-fracture values of crowns (P > 0.05).
    Conclusion: Load-to-fracture values of zirconia were higher than those of LDS, which were higher than those of ZLS. The number of fatigue loading cycles did not affect the load-to-fracture of the tested crowns for a given material.
    Clinical significance: More research needs to be conducted before considering the routine use of ZLS for molars in patients with high risk of parafunctional habits.
    MeSH term(s) Ceramics ; Computer-Aided Design ; Crowns ; Dental Porcelain ; Dental Restoration Failure ; Dental Stress Analysis ; Humans ; Materials Testing ; Resin Cements ; Zirconium
    Chemical Substances Resin Cements ; Dental Porcelain (12001-21-7) ; Zirconium (C6V6S92N3C)
    Language English
    Publishing date 2019-02-28
    Publishing country England
    Document type Journal Article
    ZDB-ID 2043146-6
    ISSN 1708-8240 ; 1496-4155
    ISSN (online) 1708-8240
    ISSN 1496-4155
    DOI 10.1111/jerd.12462
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Biocompatibility of dental amalgams.

    Uçar, Yurdanur / Brantley, William A

    International journal of dentistry

    2011  Volume 2011, Page(s) 981595

    Abstract: Objective. The purpose of this review paper is to review the literature regarding the toxicology of mercury from dental amalgam and evaluate current statements on dental amalgam. Materials and Methods. Two key-words "dental amalgam" and "toxicity" were ... ...

    Abstract Objective. The purpose of this review paper is to review the literature regarding the toxicology of mercury from dental amalgam and evaluate current statements on dental amalgam. Materials and Methods. Two key-words "dental amalgam" and "toxicity" were used to search publications on dental amalgam biocompatibility published in peer-reviewed journals written in English. Manual search was also conducted. The most recent declarations and statements were evaluated using information available on the internet. Case reports were excluded from the study. Results. The literature show that mercury released from dental amalgam restorations does not contribute to systemic disease or systemic toxicological effects. No significant effects on the immune system have been demonstrated with the amounts of mercury released from dental amalgam restorations. Only very rarely have there been reported allergic reactions to mercury from amalgam restorations. No evidence supports a relationship between mercury released from dental amalgam and neurological diseases. Almost all of the declarations accessed by the internet stated by official organizations concluded that current data are not sufficient to relate various complaints and mercury release from dental amalgam. Conclusions. Available scientific data do not justify the discontinuation of amalgam use from dental practice or replacement with alternative restorative dental materials.
    Language English
    Publishing date 2011-11-23
    Publishing country Egypt
    Document type Journal Article
    ZDB-ID 2546524-7
    ISSN 1687-8736 ; 1687-8736
    ISSN (online) 1687-8736
    ISSN 1687-8736
    DOI 10.1155/2011/981595
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Early antiretroviral therapy in SIV-infected rhesus macaques reveals a multiphasic, saturable dynamic accumulation of the rebound competent viral reservoir.

    Keele, Brandon F / Okoye, Afam A / Fennessey, Christine M / Varco-Merth, Benjamin / Immonen, Taina T / Kose, Emek / Conchas, Andrew / Pinkevych, Mykola / Lipkey, Leslie / Newman, Laura / Macairan, Agatha / Bosche, Marjorie / Bosche, William J / Berkemeier, Brian / Fast, Randy / Hull, Mike / Oswald, Kelli / Shoemaker, Rebecca / Silipino, Lorna /
    Gorelick, Robert J / Duell, Derick / Marenco, Alejandra / Brantley, William / Smedley, Jeremy / Axthelm, Michael / Davenport, Miles P / Lifson, Jeffrey D / Picker, Louis J

    PLoS pathogens

    2024  Volume 20, Issue 4, Page(s) e1012135

    Abstract: The rebound competent viral reservoir (RCVR)-virus that persists during antiretroviral treatment (ART) and can reignite systemic infection when treatment is stopped-is the primary barrier to eradicating HIV. We used time to initiation of ART during ... ...

    Abstract The rebound competent viral reservoir (RCVR)-virus that persists during antiretroviral treatment (ART) and can reignite systemic infection when treatment is stopped-is the primary barrier to eradicating HIV. We used time to initiation of ART during primary infection of rhesus macaques (RMs) after intravenous challenge with barcoded SIVmac239 as a means to elucidate the dynamics of RCVR establishment in groups of RMs by creating a multi-log range of pre-ART viral loads and then assessed viral time-to-rebound and reactivation rates resulting from the discontinuation of ART after one year. RMs started on ART on days 3, 4, 5, 6, 7, 9 or 12 post-infection showed a nearly 10-fold difference in pre-ART viral measurements for successive ART-initiation timepoints. Only 1 of 8 RMs initiating ART on days 3 and 4 rebounded after ART interruption despite measurable pre-ART plasma viremia. Rebounding plasma from the 1 rebounding RM contained only a single barcode lineage detected at day 50 post-ART. All RMs starting ART on days 5 and 6 rebounded between 14- and 50-days post-ART with 1-2 rebounding variants each. RMs starting ART on days 7, 9, and 12 had similar time-to-measurable plasma rebound kinetics despite multiple log differences in pre-ART plasma viral load (pVL), with all RMs rebounding between 7- and 16-days post-ART with 3-28 rebounding lineages. Calculated reactivation rates per pre-ART pVL were highest for RMs starting ART on days 5, 6, and 7 after which the rate of accumulation of the RCVR markedly decreased for RMs treated on days 9 and 12, consistent with multiphasic establishment and near saturation of the RCVR within 2 weeks post infection. Taken together, these data highlight the heterogeneity of the RCVR between RMs, the stochastic establishment of the very early RCVR, and the saturability of the RCVR prior to peak viral infection.
    MeSH term(s) Animals ; Simian Acquired Immunodeficiency Syndrome/drug therapy ; Simian Immunodeficiency Virus/physiology ; Macaca mulatta ; Virus Replication ; Anti-Retroviral Agents/therapeutic use ; Anti-Retroviral Agents/pharmacology ; HIV Infections/drug therapy ; Viral Load
    Chemical Substances Anti-Retroviral Agents
    Language English
    Publishing date 2024-04-09
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2205412-1
    ISSN 1553-7374 ; 1553-7374
    ISSN (online) 1553-7374
    ISSN 1553-7374
    DOI 10.1371/journal.ppat.1012135
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Hydroxyapatite precipitation on nanotube surfaces of Ti-35Ta-xNb alloys.

    Jo, Chae-Ik / Jeong, Yong-Hoon / Brantley, William A / Choe, Han-Cheol

    Journal of nanoscience and nanotechnology

    2015  Volume 14, Issue 10, Page(s) 7581–7584

    Abstract: Hydroxyapatite precipitation on nanotube surfaces of Ti-35Ta-xNb alloys was investigated using electrochemical methods. The alloys were prepared by arc-melting, heat treated at 1050 degrees C for 12 h in an Ar atmosphere, and quenched in 0 degrees C ... ...

    Abstract Hydroxyapatite precipitation on nanotube surfaces of Ti-35Ta-xNb alloys was investigated using electrochemical methods. The alloys were prepared by arc-melting, heat treated at 1050 degrees C for 12 h in an Ar atmosphere, and quenched in 0 degrees C water. Nanotubes were created on the Ti-35Ta-xNb alloys in a 1 M H3PO4 + 1.2 wt.% NaF electrolyte at room temperature. Hydroxyapatite precipitation was carried out in a 0.03 M Ca(NO3)2 x 4H2O + 0.018 M NH4H2PO4 solution at 80 ± 1 degrees C, using 10 deposition cycles. Information about morphology and composition was obtained by FE-SEM and EDS. The microstructure of the Ti-35Ta-xNb alloys was transformed from α phase to βphase as the Nb content increased. The HA precipitates had a plate-like morphology on bulk Ti-35Ta-xNb alloys and a flower-like morphology on nanotubular Ti-35Ta-xNb alloys.
    Language English
    Publishing date 2015-05-04
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 1533-4899
    ISSN (online) 1533-4899
    DOI 10.1166/jnn.2014.9576
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: Nanotube nucleation phenomena on Ti-25Ta-xZr alloys for implants using ATO technique.

    Kim, Hyun-Ju / Jeong, Yong-Hoon / Brantley, William A / Choe, Han-Cheol

    Journal of nanoscience and nanotechnology

    2015  Volume 14, Issue 10, Page(s) 7569–7573

    Abstract: The purpose of this study was to investigate nanotube nucleation phenomena on the Ti-25Ta-xZr alloys for implant materials, using an anodic titanium oxide (ATO) technique. Ti-25Ta-(0 wt.%-15 wt.%) Zr alloys were prepared using a vacuum arc-melting ... ...

    Abstract The purpose of this study was to investigate nanotube nucleation phenomena on the Ti-25Ta-xZr alloys for implant materials, using an anodic titanium oxide (ATO) technique. Ti-25Ta-(0 wt.%-15 wt.%) Zr alloys were prepared using a vacuum arc-melting furnace. The Ti-25Ta-xZr alloys were then homogenized for 12 hr at 1000 degrees C, followed by water quenching. Formation of the nanotubular oxide surface structure was achieved initially on the Ti-25Ta-xZr alloys by anodization in a 1 M H3PO4 electrolyte containing 0.8 wt.% NaF at room temperature, using a potentiostat. After the first formation of the nanotubes was achieved, this initial nanotube layer was eliminated, and further anodization was carried out repeatedly. The microstructure, phase transformation, and morphology of nanotubular Ti-25Ta-xZr alloys and the process of nanotube growth using this ATO method were analyzed by X-ray diffraction, field-emission scanning electron microscopy, and energy dispersive X-ray spectroscopy. Microstructures of the Ti-25Ta-xZr alloys changed from α" phase to β phase. Nanotubes formed with the ATO technique had pit-like top holes, with thinner walls and lower contact angle, compared to the initially formed nanotubes.
    MeSH term(s) Alloys/chemistry ; Dental Implants ; Electrodes ; Nanotubes/chemistry ; Tantalum/chemistry ; Titanium/chemistry ; Zirconium/chemistry
    Chemical Substances Alloys ; Dental Implants ; titanium dioxide (15FIX9V2JP) ; Tantalum (6424HBN274) ; Zirconium (C6V6S92N3C) ; Titanium (D1JT611TNE)
    Language English
    Publishing date 2015-05-04
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 1533-4880
    ISSN 1533-4880
    DOI 10.1166/jnn.2014.9577
    Database MEDical Literature Analysis and Retrieval System OnLINE

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