Objective: Some of the most significant aspects in orthodontics for achieving favorable treatment outcomes include correct bracket positioning and a shorter period to accomplish bracket bonding. Two different brackets bonding techniques - direct and indirect bonding - are described in the literature. The aim of this review is to evaluate the differences, advantages, and disadvantages of the two techniques.
Materials And Methods: A literature search was conducted on PubMed, Scopus, and Web of Science databases in a period from January 2013 to April 2023 with English language restriction using the following Boolean keywords: "orthodontic bracket* AND (bonding OR placement)".
Results: A total of 3,820 articles were identified by the electronic search, and after duplicate removal, screening, and eligibility, a total of 11 papers were included for the qualitative analysis.
Conclusions: Indirect bonding is more predictable and precise than direct bonding. Indirect bonding has a greater impact on minimizing bracket placement errors than direct bonding, but it still takes longer to complete than the traditional procedure. However, further studies on the differences between direct and indirect bonding, as well as digital bonding, are needed.
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http://dx.doi.org/10.26355/eurrev_202309_33565 | DOI Listing |
Med Sci Monit
January 2025
College of Dentistry, King Khalid University, Abha, Saudi Arabia.
BACKGROUND Indirect ceramic restorations often need multiple firings to match the shade of natural teeth or need after-correction and ceramic addition during the clinical trial stage. Many studies have examined how multiple firings affect the mechanical characteristics of zirconia-veneered prostheses. The effect of firing number on adhesion between these core and heat-pressed lithium disilicate veneering ceramics is unclear.
View Article and Find Full Text PDFMater Horiz
January 2025
Department of Materials Science, University of Michigan, Ann Arbor, Michigan 48109, USA.
It is difficult to intuit how electronic structure features-such as band gap magnitude, location of band extrema, effective masses, -arise from the underlying crystal chemistry of a material. Here we present a strategy to distill sparse and chemically-interpretable tight-binding models from density functional theory calculations, enabling us to interpret how multiple orbital interactions in a 3D crystal conspire to shape the overall band structure. Applying this process to silicon, we show that its indirect gap arises from a competition between first and second nearest-neighbor bonds-where second nearest-neighbor interactions pull the conduction band down from Γ to X in a cosine shape, but the first nearest-neighbor bonds push the band up near X, resulting in the characteristic dip of the silicon conduction band.
View Article and Find Full Text PDFJ Marital Fam Ther
January 2025
School of Family Life, Brigham Young University, Provo, Utah, USA.
Healthy sexuality includes relational, emotional, and physical elements as noted in the sexual wholeness model. Genital acceptance (emotional comfort with reactions to genitalia) and physical sexual knowledge (knowledge of the physical aspects of sex) are two areas of physical relationships that may be associated with sexual satisfaction. Attachment is a factor that has been associated with sexual relationships and may be an intervening variable between the physical aspects of sex and sexual satisfaction.
View Article and Find Full Text PDFPLoS One
January 2025
Manchester Cancer Research Centre, Division of Cancer Sciences, School of Medical Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, United Kingdom.
Non-covalent protein-protein interactions are one of the most fundamental building blocks in cellular signalling pathways. Despite this, they have been historically hard to identify using conventional methods due to their often weak and transient nature. Using genetic code expansion and incorporation of commercially available unnatural amino acids, we have developed a highly accessible method whereby interactions between biotinylated ubiquitin-like protein (UBL) probes and their binding partners can be stabilised using ultraviolet (UV) light-induced crosslinks.
View Article and Find Full Text PDFMicroscopy (Oxf)
January 2025
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan.
The self-absorption effects observed in the background intensity just above the Si L-emission spectra of Si and β-Si3N4, and the C K-emission spectra of diamond and graphite were examined. Based on comparisons with reported results, the energy positions of absorption edges-representing the bottom of conduction bands (CB)-were assigned. The self-absorption profiles in the background intensities were consistent with previously reported data.
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