{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,18]],"date-time":"2026-09-18T15:59:19Z","timestamp":1789747159857,"version":"4.0.1"},"reference-count":0,"publisher":"Biomedical Informatics","issue":"12","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Bioinformation"],"published-print":{"date-parts":[[2020,12,31]]},"abstract":"<jats:p>It is of interest to evaluate the frequency of premolar extractions during orthodontic treatment in patients reporting to the Saveetha dental hospital in Chennai from 2019-2020. We used the records from 987 patients who underwent orthodontic treatment from June 2019 to March 2020 in a dental hospital for this analysis. Digital case records of patients who underwent therapeutic extractions of premolars were isolated. A sample dataset of 340 case records were selected for this study. Data shows that 34.4% of subjects underwent premolar extractions amongst a total of 987 subjects who underwent orthodontic treatment. 89.4% of patients were Angle\u2019s Class I malocclusion patients, and the rest were Class II patients. However, no premolar extractions were done in Class III patients. Data also shows that 67.1% of subjects underwent all 4 first premolar extractions and 13.2% underwent only upper first premolar extractions. Thus, a significant association was found between Type of Malocclusion and the Type of premolar extractions with p &lt; 0.05. Moreover, only 34.4% of patients underwent premolar extractions and the majority of them underwent all 4 first premolar extractions.<\/jats:p>","DOI":"10.6026\/973206300161080","type":"journal-article","created":{"date-parts":[[2021,1,9]],"date-time":"2021-01-09T14:48:57Z","timestamp":1610203737000},"page":"1080-1087","source":"Crossref","is-referenced-by-count":10,"title":["Frequency of premolar teeth extractions for orthodontic treatment"],"prefix":"10.6026","volume":"16","author":[{"given":"Kumar","family":"Kumar","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"4070","published-online":{"date-parts":[[2020,12,31]]},"container-title":["Bioinformation"],"original-title":[],"deposited":{"date-parts":[[2021,1,9]],"date-time":"2021-01-09T14:49:23Z","timestamp":1610203763000},"score":1,"resource":{"primary":{"URL":"http:\/\/www.bioinformation.net\/016\/973206300161080.htm"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2020,12,31]]},"references-count":0,"journal-issue":{"issue":"12","published-online":{"date-parts":[[2020,12,31]]},"published-print":{"date-parts":[[2020,12,31]]}},"URL":"https:\/\/doi.org\/10.6026\/973206300161080","relation":{},"ISSN":["0973-8894","0973-2063"],"issn-type":[{"value":"0973-8894","type":"print"},{"value":"0973-2063","type":"electronic"}],"subject":[],"published":{"date-parts":[[2020,12,31]]}}}