Journal article

Long-term (≥15 years) post-treatment changes and outcome quality after Class II: 1 treatment in comparison to untreated Class I controls


Authors listBock, Niko C.; Saffar, Mitra; Hudel, Helge; Evalahti, Marjut; Heikinheimo, Kaisa; Rice, David P.; Ruf, Sabine

Publication year2018

Pages206-213

JournalEuropean Journal of Orthodontics

Volume number40

Issue number2

ISSN0141-5387

eISSN1460-2210

Open access statusBronze

DOI Linkhttps://doi.org/10.1093/ejo/cjx051

PublisherOxford University Press


Abstract

Aim: To investigate the long-term (>= 15 years) post-treatment (Tx) occlusal changes and outcome quality after Class II: 1 Tx.

Subjects and Methods: Herbst-MBA Tx had been performed at age 12.8 +/- 2.7 years in 119 patients. A recall was conducted and study models from before and after active Tx, after retention as well as after recall were evaluated using standard occlusal variables and the PAR index. These data were compared to 31 untreated Class I controls.

Results: 52 out of 119 patients could be located and participated at 33.6 +/- 3.1 years. Compared to the 67 patients who did not participate in the recall, the pre- and post-Tx occlusal data of the participants did not differ systematically; however, the PAR scores were higher by 3.0-4.7 points at all times. Pre-Tx, the mean values of the 52 participants were: PAR = 27.2 +/- 7.6, Class II molar relationship (MR) = 0.7 cusp widths (cw), overjet = 8.2 mm, overbite = 4.1 mm. After Tx, the PAR score was 3.4 +/- 2.2. A Class I MR (0.0 +/- 0.1 cw) with normal overjet (2.3 +/- 0.7 mm) and overbite (1.3 +/- 0.7 mm) existed. At recall, a mild PAR score increase to 8.2 +/- 5.5 points had occurred; this was mainly due to increased overjet and overbite values (3.6 +/- 1.1 and 2.8 +/- 1.6 mm) while the MR was stable (0.0 +/- 0.2 cw). For all these variables, similar findings were made in the untreated controls.

Conclusion: The occlusal outcome of Class II: 1 Tx showed very good long-term stability. While mild changes occur post-Tx, the long-term result is similar to untreated Class I controls.




Citation Styles

Harvard Citation styleBock, N., Saffar, M., Hudel, H., Evalahti, M., Heikinheimo, K., Rice, D., et al. (2018) Long-term (≥15 years) post-treatment changes and outcome quality after Class II: 1 treatment in comparison to untreated Class I controls, European Journal of Orthodontics, 40(2), pp. 206-213. https://doi.org/10.1093/ejo/cjx051

APA Citation styleBock, N., Saffar, M., Hudel, H., Evalahti, M., Heikinheimo, K., Rice, D., & Ruf, S. (2018). Long-term (≥15 years) post-treatment changes and outcome quality after Class II: 1 treatment in comparison to untreated Class I controls. European Journal of Orthodontics. 40(2), 206-213. https://doi.org/10.1093/ejo/cjx051



Keywords


ADOLESCENT HERBST THERAPYFIXED FUNCTIONAL APPLIANCESMALOCCLUSIONSNORMAL OCCLUSIONORTHODONTIC TREATMENTPOSTRETENTIONRELAPSE


SDG Areas


Last updated on 2025-10-06 at 10:51