Journal article

Publication year: 2024

Pages: 260-269

Journal: Journal of Orofacial Orthopedics

Volume number: 85

Issue number: 4

ISSN: 1434-5293

eISSN: 1615-6714

Open access status: Hybrid

DOI Link: https://doi.org/10.1007/s00056-023-00457-3

Publisher: Springer

Abstract: 
PurposeTo compare the long-term outcome quality (>= 15 years) of Class II:1 treatment using either a bionator (BIO) or a Herbst-multibracket appliance (HMB).MethodsPatients who underwent functional treatment during the ideal treatment period for the respective approach (prepuberty vs. peak/postpeak) were assessed. Inclusion criteria were overjet >= 4 mm, skeletal Class II and availability of study casts from before, after and >= 15 years after treatment. The study casts were assessed using the Peer Assessment Rating (PAR) index and standard orthodontic cast measurements.ResultsDuring treatment, PAR score, overjet and sagittal occlusal relationship improved significantly in all groups. Long-term, there was a significant increase of incisor irregularity in the upper (HMB) and lower (BIO) arch and a significant decrease of lower arch width 3 - 3 (BIO). PAR score, overjet, and sagittal occlusal relationship remained stable long-term. Intergroup comparisons revealed significant differences between the BIO and HMB groups in terms of lower arch width (6 - 6), upper and lower arch width (3 + 3/3 - 3) as well as sagittal molar relationship.ConclusionsThe achieved improvement in PAR score, overjet, and sagittal occlusion remained comparably stable long-term in all groups. The long-term changes are probably a consequence of natural aging.

Harvard Citation style: Bock, N., Jungbauer, R., Rudzki, I., Proff, P. and Ruf, S. (2024) Long-term (≥ 15 years) outcome quality after Class II:1 bionator or Herbst multibracket appliance treatment A comparison, Journal of Orofacial Orthopedics, 85(4), pp. 260-269. https://doi.org/10.1007/s00056-023-00457-3

APA Citation style: Bock, N., Jungbauer, R., Rudzki, I., Proff, P., & Ruf, S. (2024). Long-term (≥ 15 years) outcome quality after Class II:1 bionator or Herbst multibracket appliance treatment A comparison. Journal of Orofacial Orthopedics. 85(4), 260-269. https://doi.org/10.1007/s00056-023-00457-3