Space closure versus space opening for bilateral absent upper lateral incisors: what is the duration of orthodontic treatment?
Journal
European journal of orthodontics
ISSN: 1460-2210
Titre abrégé: Eur J Orthod
Pays: England
ID NLM: 7909010
Informations de publication
Date de publication:
11 09 2020
11 09 2020
Historique:
pubmed:
16
8
2019
medline:
30
9
2020
entrez:
16
8
2019
Statut:
ppublish
Résumé
Assessment of orthodontic treatment outcomes such as treatment duration in patients with hypodontia are lacking. To assess the overall treatment duration of cases of bilateral absent upper lateral incisors treated with either orthodontic space closure (SC) or space opening (SO). The secondary aim was to determine factors which influence overall treatment duration. A retrospective cohort study was undertaken within the Orthodontic department at Kings College Hospital NHS Foundation Trust. Consecutively treated patients between 2008 and 2018 with bilateral absent upper lateral incisors were identified from clinic lists, clinical logbooks, and multidisciplinary clinics. All study data variables were collected by a single investigator using a pre-specified data collection sheet. In total, 52 cases were included, 29 in the SC group and 23 in the SO group. Overall non-extraction treatment was favoured (P = 0.001) with differences in restorations provided post-treatment evident (P = 0.01). Although not statistically significant, the mean overall orthodontic treatment duration was less in the SC group 25.7 months (SD 7.6) compared to the SO group 27.4 (SD 6.1). Overall treatment duration was reduced if treatment was carried out on an extraction basis (-7.02, 95% CI: -11.93, 2.11, P = 0.01) but increased as the amount of crowding in the lower arch increased (0.89, 95% CI: 0.08, 1.71, P = 0.03). Within the study limitations, there is no difference in the overall treatment duration between both treatment approaches. Treatment duration is reduced in both SO or SC treatment plans if extractions are undertaken. The presence of lower arch crowding increases the duration of treatment.
Sections du résumé
BACKGROUND
Assessment of orthodontic treatment outcomes such as treatment duration in patients with hypodontia are lacking.
OBJECTIVES
To assess the overall treatment duration of cases of bilateral absent upper lateral incisors treated with either orthodontic space closure (SC) or space opening (SO). The secondary aim was to determine factors which influence overall treatment duration.
SUBJECTS AND METHODS
A retrospective cohort study was undertaken within the Orthodontic department at Kings College Hospital NHS Foundation Trust. Consecutively treated patients between 2008 and 2018 with bilateral absent upper lateral incisors were identified from clinic lists, clinical logbooks, and multidisciplinary clinics. All study data variables were collected by a single investigator using a pre-specified data collection sheet.
RESULTS
In total, 52 cases were included, 29 in the SC group and 23 in the SO group. Overall non-extraction treatment was favoured (P = 0.001) with differences in restorations provided post-treatment evident (P = 0.01). Although not statistically significant, the mean overall orthodontic treatment duration was less in the SC group 25.7 months (SD 7.6) compared to the SO group 27.4 (SD 6.1). Overall treatment duration was reduced if treatment was carried out on an extraction basis (-7.02, 95% CI: -11.93, 2.11, P = 0.01) but increased as the amount of crowding in the lower arch increased (0.89, 95% CI: 0.08, 1.71, P = 0.03).
CONCLUSIONS
Within the study limitations, there is no difference in the overall treatment duration between both treatment approaches. Treatment duration is reduced in both SO or SC treatment plans if extractions are undertaken. The presence of lower arch crowding increases the duration of treatment.
Identifiants
pubmed: 31414115
pii: 5550259
doi: 10.1093/ejo/cjz062
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
460-465Informations de copyright
© The Author(s) 2019. Published by Oxford University Press on behalf of the European Orthodontic Society. All rights reserved. For permissions, please email: journals.permissions@oup.com.