Results

In the beginning, 9982 studies were located: 96 in APA PsycINFO, 5208 in Embase, and 4678 in PubMed. 6038 studies were left after duplicates (3944) were eliminated. After screening titles and abstracts, 5916 research were eliminated, leaving 122 papers. These studies' reference lists were also examined for pertinent publications and unpublished papers. No other research was discovered. Following full-text screening, one item was eliminated because it was a review rather than an original study, two because it was a letter to the editor without data, and seventeen because of language. After contacting the authors, four studies were not retrieved. There was no contact information provided for two studies. A total of 83 articles were disqualified due to their failure to satisfy the inclusion requirements. More precisely, studies that reported complete mouth extractions (n = 3), included information on minors (n = 54), or indicated no age range (n = 9) were disqualified since it was unable to ascertain the reasons for extraction of each tooth in the latter example. Studies that included third molars (n = 3) were likewise disqualified. Our inclusion criteria were not fully met by four more studies, for example, because of the age range or the uncertainty surrounding the inclusion of third molars or children under the age of 18.The raw data from the research was requested from the corresponding authors of the aforementioned papers.