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A variety of metals and alloys are employed in the field of orthodontics, primary of which happen to be the construction of wires. Through this systematic review, we aimed to assess the various metallurgical characteristics of the said metals and alloys. Four hundred and eighty-two documents in total were found after a thorough search of the online journals, and 169 of the papers were initially chosen. Ultimately, 16 documents were selected that satisfied the necessary inclusion and exclusion criteria, primarily in vitro studies, literature reviews, and comparative analyses. NiTi alloy was found to be the most commonly used alloy in construction of orthodontic wires across all the studies that we had selected for our review. It also had better performance and consistency in terms of its usage as depicted by the meta-analysis performed, with stainless steel wires being a close second primarily due to its lesser cost compared to the former. Metallurgy and orthodontics are inextricably linked with one another. The various components of orthodontics such as wires, pliers, and other instruments utilize the metallurgical characteristics of metals and alloys that are specially prepared for the challenges of this field. PROSPERO Registration Number: CRD42022378444., Competing Interests: There are no conflicts of interest., (Copyright: © 2023 Journal of Orthodontic Science.)

The nutritional needs already increased by adolescent growth, activity, and stress are further exacerbated by the physical, physiological, and psychological stress that orthodontic treatment causes. Hence, the main objective of this systematic review was to analyze the relationship between adequate nutrition and its impact on orthodontic treatment success rates. Using relevant keywords, reference searches, and citation searches, the databases such as PubMed-Medical Literature Analysis and Retrieval System Online, Web of Science, Cochrane, and Scopus were all searched. "Diet," "Minerals," "Nutrition," "Orthodontics," and "Vitamins" were the search terms used to scour the database. The 10 studies selected for the systematic review and subsequent meta-analysis could not conclusively establish the correlation between proper nutrition and its impact on orthodontic treatment of the patient. There was virtually little connection between patients' dietary intake and the effectiveness of their orthodontic treatment. Additionally, a direct causal link between the two could not be established legitimately because the majority of the studies reviewed only noted an impact during the early stages of the treatment. PROSPERO Registration Number: CRD42022380828., Competing Interests: There are no conflicts of interest., (Copyright: © 2023 Journal of Orthodontic Science.)

Infection control is essential to protect both the doctor and the patient by preventing the spread of infectious diseases. There is no exception in the field of dentistry, particularly in orthodontics, where numerous appliances are used for a variety of functions and also because the mouth cavity has the highest concentration of bacteria of any body part. Through this systematic review, we aimed to assess the various methods of sterilization employed in an orthodontic setting. Using relevant keywords, reference searches, and citation searches, the databases such as PubMed, MEDLINE, Web of Science, Cochrane, and Scopus were all searched; a total of 206 documents were found, of which 113 were initially selected. The remaining 23 distinct papers were initially made available after 90 publications that were identical to or similar to one another were eliminated. The final selection was made from eight documents that met all inclusion and exclusion requirements. The existing methods of sterilization were found to be competent in dealing with the microorganisms found in a typical orthodontic setting. The chemical method of sterilization was the norm in most of the studies that we assessed, with glutaraldehyde and peracetic acid (PAA) being the most commonly employed compounds for disinfection. PROSPERO Registration Number: CRD42022380831., Competing Interests: There are no conflicts of interest., (Copyright: © 2023 Journal of Orthodontic Science.)

Coronavirus disease of 2019 (COVID-19), which has affected almost all medical professions, has had a significant negative influence on dental care. Additionally, non-urgent dental procedures were stopped during the epidemic in a number of countries. The purpose of this systematic review was to examine the impact of COVID-19 on individuals who had undergone or are currently having orthodontic treatment in any capacity during/after the pandemic's occurrence. After a thorough search of the online journals, a total of 634 documents were found, and 416 of the papers were initially chosen. The removal of 362 similar or duplicate publications that followed led to the initial availability of 54 separate papers. The final selection consisted of 23 documents, mostly in vitro investigations, cross-sectional studies, and comparative evaluations, which satisfied the necessary inclusion and exclusion criteria. COVID-19 had a significant impact on nearly every sphere of the patients' lives who were undergoing orthodontic treatment. However, people who are currently availing of various orthodontic treatment modalities did not experience the same issues as the ones faced by patients earlier. Teleorthodontics emerged as a viable option to access treatment during the lockdown period caused due to the pandemic. COVID-19 also had an overall negative impact on the psyche and morale of orthodontists around the world. PROSPERO Registration Number: CRD42022380823 ., Competing Interests: There are no conflicts of interest., (Copyright: © 2023 Journal of Orthodontic Science.)