Changes in the size of dental arches in different variants of the course of the retention period of treatment in patients with anomalies in the maxillary canines position
Year: 2024
Type: article
Study design: Observational Study
Abstract: Objective. To assess the changes in the size of dental arches in different variants of the course of the retention period in patients with anomalies in the position of the maxillary canines in a long-term follow-up. Materials and methods. An open prospective clinical and instrumental study with elements of retrospective analysis was conducted. The study included 69 patients aged 18 to 45 (median age 24,1 ± 0,9 years) in the retention period of orthodontic treatment for anomalies in the position of the maxillary canines. The duration of patients` observation was from 2 to 8 years (median duration 3,57 ± 0,24 years). The patients were divided into groups depending on the course of the retention period. Group 1 contained patients with an unfavorable course (having a relapse of the dentoalveolar anomaly): 22 people (9 males and 13 females), average age 23,8 ± 3,4 years; group 2 included patients with a favorable course (having a clinically stable result of treatment): 47 people (19 males and 28 females), average age 22,6 ± 1,9 years. Results. At a long-term follow-up in the retention period a common pattern of geometric changes in the dentition with various degrees of severity, was revealed in patients of both groups. The most pronounced reduction of the transverse dimensions of the dental arches was in the area of the maxillary canines (–1,38 ± 0,27 mm in group 1, – 0,30 ± 0,20 mm in group 2) and upper premolars (–3,25 ± 0,52 mm in group 1, –1,27 ± 0,12 mm in group 2). The increase in the length of the anterior sections of the dental arches in individuals with the phenomena of "true relapse" was 0,95 ± 0,32 mm on the upper jaw, 0,50 ± 0,19 mm on the lower jaw, in individuals with "relapse-like movement" of teeth – 2,44 ± 0,16 mm on the upper jaw and 1,53 ± 0,24 mm on the lower jaw, in patients with a stable treatment result – 0,66 ± 0,25 on the upper jaw, 0,51 ± 0,19 mm on the lower jaw, which indicates a mutually balanced change in the transverse and sagittal parameters. Conclusions. In the long-term observation period (2 or more years from the beginning of the retention period of orthodontic treatment), a change in the metric parameters of the dental arches is revealed in patients with anomalies in the position of the maxillary canines, which causes a recurrent change in their shape in the lateral parts. At the same time, the final values of absolute increase of transverse parameters both in case of a stable result of orthodontic treatment and with a relapse of the anomaly practically have no differences.
Source: Perm Medical Journal
DOI: 10.17816/pmj41668-75
Authors: D. A. Rusanova, P. V. Ishmurzin
Institution: Perm State Medical Academy
Language: English
Subfield: Orthodontics
Field: Dentistry
Domain: Health Sciences
Open Access status: diamond
OpenAlex ID: W4406792422