Smile esthetics: Evaluation of long-term changes in the transverse dimension / 대한치과교정학회지
The Korean Journal of Orthodontics
; : 100-107, 2017.
Article
in English
| WPRIM (Western Pacific)
| ID: wpr-86674
Responsible library:
WPRO
ABSTRACT
OBJECTIVE:
To analyze the long-term changes in maxillary arch widths and buccal corridor ratios in orthodontic patients treated with and without premolar extractions.METHODS:
The study included 53 patients who were divided into the extraction (n = 28) and nonextraction (n = 25) groups. These patients had complete orthodontic records from the pretreatment (T1), posttreatment (T2), and postretention (T3) periods. Their mean retention and postretention times were 4 years 2 months and 17 years 8 months, respectively. Dental models and smiling photographs from all three periods were digitized to compare the changes in three dental arch width measurements and three buccal corridor ratios over time between the extraction and nonextraction groups. Data were analyzed using analysis of variance tests. Post-hoc multiple comparisons were made using Bonferroni correction.RESULTS:
Soft-tissue extension during smiling increased with age in both groups. The maximum dental width to smile width ratio (MDW/SW) also showed a favorable increase with treatment in both groups (p 0.05). According to the MDW/SW ratio, the mean difference in the buccal corridor space of the two groups was 2.4 ± 0.2% at T3. Additionally, no significant group × time interaction was found for any of the buccal corridor ratios studied.CONCLUSIONS:
Premolar extractions did not negatively affect transverse maxillary arch widths and buccal corridor ratios. The long-term outcome of orthodontic treatment was comparable between the study groups.
Full text:
Available
Database:
WPRIM (Western Pacific)
Main subject:
Smiling
/
Bicuspid
/
Dental Arch
/
Models, Dental
/
Esthetics
Limits:
Humans
Language:
English
Journal:
The Korean Journal of Orthodontics
Year:
2017
Document type:
Article