Presurgical Decompensation in Patients Affected by Class III Dentoskeletal Malocclusion: A Comparison between Two Different Bracket Systems

Abstract

The aim of this study was to analyse if bracket systems could affect the incisors’ decompensation in a group of patients affected by dentoskeletal Class III malocclusion and on the duration of presurgical orthodontics. A single-centre retrospective study was carried out on two groups of patients affected by dentoskeletal Class III and who underwent orthognathic surgery. Group 1, comprising 25 subjects (13 males, 12 females; mean age, 27.4 y.o.), was treated with interactive self-ligating brackets; group 2, comprising 10 subjects (5 males, 5 females; mean age, 27.2 y.o.), was treated with conventional twin brackets. Bracket prescription and archwire sequence were the same for both groups. Data were collected about age, upper incisors’ axis (UI^ANS-PNS), lower incisors’ axis (IMPA), and the total duration of presurgical orthodontics and were then compared between the two groups. The variation in the upper incisor axis and the duration of presurgical orthodontics was not significant between the groups, while the difference in the IMPA was small but significant. The use of a self-ligating bracket did not influence the decompensation of the upper incisors or the duration of presurgical orthodontics when compared with conventional ligating brackets. The difference in the IMPA was significantly different but clinically negligible.

Keywords

• Class III malocclusion
• dentoskeletal malocclusion
• orthognathic surgery
• presurgical orthodontics
• self-ligating brackets