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Frequency of premolar teeth extractions for orthodontic treatment


Kumar et al.



Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha University, Chennai, Tamil Nadu, India



Ravindra Kumar Jain - ravindrakumar@saveetha.com; *Corresponding author


Article Type

Research Article



Received October 7, 2020; Revised October 27, 2020; Accepted October 27, 2020; Published December 31, 2020



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’s 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 < 0.05. Moreover, only 34.4% of patients
underwent premolar extractions and the majority of them underwent all 4 first premolar extractions.



Angle’s malocclusion; Crowding; Orthodontic extractions; Premolar extractions.



Kumar et al. Bioinformation 16(12): 1080-1087 (2020)


Edited by

P Kangueane






Biomedical Informatics



This is an Open Access article which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. This is distributed under the terms of the Creative Commons Attribution License.