Hydroxyapatite (HA) coatings plasma sprayed without and with bond coats (titania, zirconia) onto titanium alloy (Ti6A14V) substrates under both atmospheric and low pressure plasma spray conditions were investigated in terms of their microstructure and their resorption resistance during immersion in simulated body fluid (Hank's balanced salt solution). The microstructures of test samples were characterized using SEM on as-sprayed and leached surfaces and on the corresponding cross sections. Selected coating systems were studied by 2-dimensional secondary ion mass spectroscopy imaging to obtain information on plasma spray induced diffusional processes at the coating interfaces, as well as the spatial distribution of minor and trace elements. Coatings consisting of thin (10-15 microm) titania/zirconia (eutectic ratio) and titania bond coats, combined with a 150- to 180-microm thick HA top coat, yielded peel strengths in excess of 32 N/m, as well as sufficient resorption resistance.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1002/(sici)1097-4636(199824)43:4<441::aid-jbm12>3.0.co;2-w | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Constructing Nitrogen-Coordinated Single Atom Catalysts via Bond-Plucking Strategy for Oxidation of Benzene.
Small
January 2025
Interdisciplinary Research Center of Biology & Catalysis, School of Life Sciences, Northwestern Polytechnical University, 1 Dongxiang Road, Xi' an, 710129, China.
Single-atom catalysts (SACs) with nitrogen-coordinated active centers feature unique electronic and geometric structures and thus show high catalytic activity for various industrial reactions. Searching for operable synthesis protocols to accurately devise SACs is vital but remains challenging because commonly used high-temperature pyrolysis always causes unpredictable structural changes and inhomogeneous single-atom sites. Herein, a mild bond-plucking strategy is reported to construct atomically dispersed Cu supported on graphene-liked CN (g-CN) under lower than 100 °C, and Cu foam is used as the source of metal.
View Article and Find Full Text PDFHair fragility (trichorrhexis nodosa) in alopecic Pomeranian dogs.
Vet Dermatol
February 2025
Department of Clinical Sciences and Services, Royal Veterinary College, Hatfield, Herts, UK.
Article Synopsis
- Alopecia X, a type of hair cycle arrest, is common in Pomeranian dogs, and this study explores whether these dogs also suffer from hair fragility, evidenced by hair shaft abnormalities.
- The research compared 8 alopecic Pomeranians with 36 unaffected ones, revealing significantly higher hair fragility events (66 occurrences per 10 mg) in the affected dogs compared to a reference limit of 9.75 in normal coats.
- The findings suggest that veterinarians should check for hair abnormalities in Pomeranians with HCA, indicating a need for further investigation into the causes and treatments of hair fragility in these dogs.
Effect of multi-layer applications of self-etch universal bonding agents on the adhesion of resin composite to enamel.
Odontology
January 2025
Departament of Restorative Dentistry, Dental Materials Division, Piracicaba Dental School, Post-Graduation Program in Dental Materials, State University of Campinas, 901 Limeira Ave, Areião, Piracicaba, São Paulo, 13414-903, Brazil.
To evaluate the effect of adhesive coats application on the enamel microtensile bond strength (µTBS) of universal adhesives, morphological etching pattern and their chemical interaction with hydroxyapatite (HA). Two universal adhesives were investigated: Scotchbond Universal (SBU, 3 M) and Prime&Bond Universal (PBU, Dentsply). The adhesives were applied in self-etching mode on bovine enamel (n = 8) in one (1L), two (2L) or three coats (3L) and light-cured as per manufacturers' instructions.
View Article and Find Full Text PDFEffect of radiotherapy, immediate dentin sealing and irrigation simulating single- or two-visits endodontic treatment on the bond strength to pulp chamber dentin: an in vitro study.
Odontology
January 2025
Post-Graduate Program in Oral Science, Faculty of Dentistry, Federal University of Santa Maria (UFSM), Roraima Avenue #1000, T Street, Building 26F, Room 2383, Santa Maria, Rio Grande do Sul, 97105-900, Brazil.
This study aimed to evaluate the influence of radiotherapy and different endodontic treatment protocols on the bond strength to pulp chamber dentin. Eighty mandibular molars were randomly divided into two groups (n = 40): non-irradiated and irradiated (60 Gy). The pulp chambers were sectioned, and each group was subdivided (n = 8), according to the endodontic treatment protocol: no treatment (Control); Single-visit; Two-visits; Immediate dentin sealing (IDS) + single-visit; and IDS + two-visits.
View Article and Find Full Text PDFEffect of Phytic Acid Etching and Airborne-Particle Abrasion Treatment on the Resin Bond Strength.
Clin Cosmet Investig Dent
May 2024
Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil.
Objective: This study aimed to evaluate the bond strength of a universal adhesive to dentin (μTBS) using different time periods of airborne particle abrasion (APA) and two types of acid etching.
Methods: Seventy-two human third molars were divided into 9 groups (n=8) according to dentin pretreatment: APA duration (0, 5, or 10s) and acid etching (no acid - NA, 37% phosphoric acid - PhoA, or 1% phytic acid - PhyA). APA was performed at a 0.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!