The stability of Class II correction with functional appliance therapy and orthodontic camouflage: A retrospective cohort study.

Gill, Ivan S; Pandis, Nikolaos; Fleming, Padhraig S (2021). The stability of Class II correction with functional appliance therapy and orthodontic camouflage: A retrospective cohort study. International orthodontics, 19(1), pp. 88-95. Elsevier 10.1016/j.ortho.2020.12.004

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OBJECTIVE

The aim of this study was to compare the stability of overjet reduction in adolescents treated with either orthodontic camouflage involving extraction of premolar units or functional appliance therapy.

MATERIAL AND METHODS

A retrospective cohort study was undertaken with data collected at pre-treatment (T0), debond (T1) and 12 months post-treatment (T2). The primary outcome measure was stability of overjet reduction, and secondary outcome measures included Angle's molar relationship, and Little's Irregularity Index score.

RESULTS

Forty-two Class II participants, 18 treated with a functional appliance and 24 with camouflage, were included with a mean pre-treatment age of 13.07 years (SD 1.72), with 23 (55%) being female. Mean overjet reduction during treatment in the functional appliance group was 6.99mm with relapse of just 0.62mm present at 12 months post-treatment. In the orthodontic camouflage group, there was a mean overjet reduction of 3.54mm with relapse of 0.27mm at 12 months post-treatment. Linear regression analysis confirmed no statistical difference (P=0.501) in overjet relapse between both treatment groups at 12 months post-treatment, adjusting for overjet at baseline. A further regression analysis revealed no significant association between overjet relapse and pre-treatment skeletal discrepancy, labial segment crowding, retention regime or compliance with the retention protocol.

CONCLUSIONS

Both functional appliance and orthodontic camouflage therapies appear to have good antero-posterior occlusal stability, with minor degrees of overjet relapse occurring over a 12-month follow-up period. There was no significant difference between the treatments in relation to overjet relapse, buccal segment interdigitation or anterior irregularity.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > School of Dental Medicine > Department of Orthodontics

UniBE Contributor:

Pandis, Nikolaos

Subjects:

600 Technology > 610 Medicine & health

ISSN:

1761-7727

Publisher:

Elsevier

Language:

English

Submitter:

Renate Imhof-Etter

Date Deposited:

16 Feb 2021 15:08

Last Modified:

28 Feb 2021 01:37

Publisher DOI:

10.1016/j.ortho.2020.12.004

PubMed ID:

33531277

Uncontrolled Keywords:

Angle Class II/therapy Corrective Functional Malocclusion Orthodontic appliances Orthodontics Retrospective cohort Tooth extraction Treatment stability

BORIS DOI:

10.48350/152120

URI:

https://boris.unibe.ch/id/eprint/152120

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