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Fracture load of feldspar ceramic crowns: effects of surface treatments and aging.
Clin Oral Investig
January 2025
Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Zurich, Switzerland.
Objectives: To compare the impact of intaglio surface treatments - airborne particle abrasion and hydrofluoric acid (HF) etching - of feldspar ceramic (FEL) crowns on the fracture load (FL) and to investigate the effects of abutment materials and artificial aging. The aim was to assess whether etching could be replaced by an alternative surface roughening method.
Materials And Methods: FEL crowns had their intaglio surfaces either abraded (25 µm AlO, 0.
Shear bond strength and ARI scores of metal brackets to glazed glass ceramics and zirconia: an in vitro study investigating surface treatment protocols.
BMC Oral Health
December 2024
Faculty of Dentistry, Innovative Dental Materials and Interfaces Research Unit (URB2i), UR 4462, Paris Cité University, 1 rue Maurice Arnoux, Montrouge, 92120, France.
Objective: To evaluate the shear bond strength (SBS) and adhesive remnant index (ARI) scores of metal brackets to glazed lithium disilicate reinforced glass-ceramics and zirconia according to various surface treatment protocols.
Methods: A total of 240 lithium disilicate ceramic (LD) and 240 zirconia (Zr) blocks were randomly divided according to sandblasting, hydrofluoric acid (HF) etching, universal primer use, and the adhesive system applied. A maxillary canine metal bracket was bonded to each sample with resin cement (Transbond XT, TXT).
Microstructural and Surface Texture Evaluation of Orthodontic Microimplants Covered with Bioactive Layers Enriched with Silver Nanoparticles.
J Funct Biomater
December 2024
Department of Maxillofacial Orthopaedics and Orthodontics, Pomeranian Medical University in Szczecin, Al. Powst. Wlkp. 72, 70111 Szczecin, Poland.
Bacterial infections are a common cause of clinical complications associated with the use of orthodontic microimplants. Biofilm formation on their surfaces and subsequent infection of peri-implant tissues can result in either exfoliation or surgical removal of these medical devices. In order to improve the properties of microimplants, hybrid coatings enriched with silver nanoparticles, calcium, and phosphorus were investigated.
View Article and Find Full Text PDFInfluence of surface pretreatment using cold-active atmospheric pressure plasma on bond strength of CAD-CAM-fabricated hybrid ceramic crowns: an in-vitro study.
Int J Implant Dent
December 2024
Department for Prosthetic Dentistry and Materials, University Medical Centre, Augustusplatz 2, 55131, Mainz, Germany.
Purpose: This study assesses the impact of Cold Atmospheric Pressure Plasma (CAP) pretreatment on the bond strength of two-piece hybrid ceramic abutment crowns in implant dentistry. The objective is to ascertain whether CAP can be employed as an alternative or complementary technique to conventional methods.
Methods: 80 titanium bases and 80 VITA ENAMIC polymer-infiltrated ceramic network (PICN) crowns were divided into 8 groups (n = 10) based on different surface pretreatments of the crowns before cementation: no treatment (A), hydrofluoric acid (HF) (B), HF and silane (C), silane (D), CAP (AP), HF and CAP (BP), HF, CAP, and silane (CP), and CAP and silane (DP).
Why so blue? A novel presentation of methaemoglobinaemia secondary to an inhaled occupational nitric acid exposure.
Clin Toxicol (Phila)
December 2024
Department of Toxicology and Emergency Medicine, Fiona Stanley Hospital, Perth, Australia.
Introduction: Nitric and hydrofluoric acids are commonly used in the commercial cleaning industry. We are unaware of reports of nitric acid inhalation forming methaemoglobin. Additionally, methaemoglobinaemia and treatment with methylthioninium chloride (methylene blue) may precipitate clinical uncertainty due to similar wavelengths of absorbance in pulse oximetry.
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