Journal article
Authors list: Bock, Niko C.; Saffar, Mitra; Hudel, Helge; Evalahti, Marjut; Heikinheimo, Kaisa; Rice, David P.; Ruf, Sabine
Publication year: 2018
Pages: 206-213
Journal: European Journal of Orthodontics
Volume number: 40
Issue number: 2
ISSN: 0141-5387
eISSN: 1460-2210
Open access status: Bronze
DOI Link: https://doi.org/10.1093/ejo/cjx051
Publisher: Oxford University Press
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.
Abstract:
Citation Styles
Harvard Citation style: Bock, 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 style: Bock, 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 THERAPY; FIXED FUNCTIONAL APPLIANCES; MALOCCLUSIONS; NORMAL OCCLUSION; ORTHODONTIC TREATMENT; POSTRETENTION; RELAPSE