Evaluation of the influence of mandibular third molars on mandibular anterior crowding relapse. (18th May 2020)

• Record Type: Journal Article
• Authors: Cotrin, Paula; Freitas, Karina Maria Salvatore; Freitas, Marcos Roberto; Valarelli, Fabrício Pinelli; Cançado, Rodrigo Hermont; Janson, Guilherme
• Is Part Of: Acta odontologica Scandinavica. Volume 78:Number 4(2020)
• Page Start: 297
• Page End: 302
• Publication Date: 2020-05-18
• Subjects: Relapse -- dental crowding -- third molars -- incisors; Dentistry -- Periodicals; 617.6005
• DOI: 10.1080/00016357.2019.1703142
• Languages: English
• ISSNs: 0001-6357

Abstract

Abstract: Objective: To evaluate the influence of mandibular third molars on relapse of mandibular anterior crowding in orthodontically treated patients. Material and Methods: Sample included orthodontic records of 108 patients: Group 1: 72 patients (39 female; 33 male) with third molars present in the postretention evaluation stage. Group 2: 36 patients (18 female; 18 male) who did not present the third molars in the postretention evaluation stage. Panoramic radiographs and dental models were evaluated at three different stages: pre-treatment; posttreatment and postretention. Panoramic radiographs showed the presence or absence of third molars in the 3 evaluated stages and on the dental models, overbite and mandibular anterior crowding was measured by the Little Irregularity Index. For intergroup comparisons, t -tests and a multifactorial regression analysis were used. Results: There was no statistically significant difference in the relapse of mandibular anterior crowding among the groups with and without mandibular third molars at the postretention stage. Conclusion: The presence or absence of mandibular third molars did not influence the relapse of mandibular anterior crowding in orthodontically treated patients.