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Long-term stability of dentoalveolar and skeletal changes after activator-headgear treatment.
Eur J Orthod. 2010 Feb; 32(1):28-35.EJ

Abstract

The aim of this study was to analyze the long-term stability of combined activator-headgear treatment on skeletal and dental structures in Class II patients. The material comprised 26 subjects, 10 girls and 16 boys. All had a molar Class II relationship, overjet > or =6 mm, and overbite > or =5 mm. They were treated in one practice with combined activator and headgear appliances. Lateral cephalometric radiographs and dental study casts were taken before treatment (T0, mean age 11.9 years), at the end of activator-headgear treatment (T1, mean age 15.9 years), and 12-15 years out of retention (T2, mean age 28.6 years). Nineteen cephalometric and nine dental cast variables were evaluated using a paired sample t-test between T0-T1, T1-T2, and T0-T2. At T1, the majority of the cephalometric measurements showed statistically significant changes. ANB was significantly reduced by 2.3 degrees due to a significant increase in SNB, but only small changes were observed in SNA. The interincisal angle increased as a result of significant retroclination of both maxillary and mandibular incisors. All patients achieved a Class I molar relationship and a significant reduction in overjet and overbite. At T2, the results showed only slight relapse from T1. However, the relapse did not compromise the significant improvement in almost all the cephalometric and dental variables. Combined activator-headgear treatment improved the skeletal and dental conditions and the results remained stable in the long term.

Authors+Show Affiliations

Department of Orthodontics, University of Oslo, Norway. magnhild.lerstol@odont.uio.noNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

19477971

Citation

Lerstøl, Magnhild, et al. "Long-term Stability of Dentoalveolar and Skeletal Changes After Activator-headgear Treatment." European Journal of Orthodontics, vol. 32, no. 1, 2010, pp. 28-35.
Lerstøl M, Torget O, Vandevska-Radunovic V. Long-term stability of dentoalveolar and skeletal changes after activator-headgear treatment. Eur J Orthod. 2010;32(1):28-35.
Lerstøl, M., Torget, O., & Vandevska-Radunovic, V. (2010). Long-term stability of dentoalveolar and skeletal changes after activator-headgear treatment. European Journal of Orthodontics, 32(1), 28-35. https://doi.org/10.1093/ejo/cjp042
Lerstøl M, Torget O, Vandevska-Radunovic V. Long-term Stability of Dentoalveolar and Skeletal Changes After Activator-headgear Treatment. Eur J Orthod. 2010;32(1):28-35. PubMed PMID: 19477971.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Long-term stability of dentoalveolar and skeletal changes after activator-headgear treatment. AU - Lerstøl,Magnhild, AU - Torget,Oystein, AU - Vandevska-Radunovic,Vaska, Y1 - 2009/05/28/ PY - 2009/5/30/entrez PY - 2009/5/30/pubmed PY - 2010/4/30/medline SP - 28 EP - 35 JF - European journal of orthodontics JO - Eur J Orthod VL - 32 IS - 1 N2 - The aim of this study was to analyze the long-term stability of combined activator-headgear treatment on skeletal and dental structures in Class II patients. The material comprised 26 subjects, 10 girls and 16 boys. All had a molar Class II relationship, overjet > or =6 mm, and overbite > or =5 mm. They were treated in one practice with combined activator and headgear appliances. Lateral cephalometric radiographs and dental study casts were taken before treatment (T0, mean age 11.9 years), at the end of activator-headgear treatment (T1, mean age 15.9 years), and 12-15 years out of retention (T2, mean age 28.6 years). Nineteen cephalometric and nine dental cast variables were evaluated using a paired sample t-test between T0-T1, T1-T2, and T0-T2. At T1, the majority of the cephalometric measurements showed statistically significant changes. ANB was significantly reduced by 2.3 degrees due to a significant increase in SNB, but only small changes were observed in SNA. The interincisal angle increased as a result of significant retroclination of both maxillary and mandibular incisors. All patients achieved a Class I molar relationship and a significant reduction in overjet and overbite. At T2, the results showed only slight relapse from T1. However, the relapse did not compromise the significant improvement in almost all the cephalometric and dental variables. Combined activator-headgear treatment improved the skeletal and dental conditions and the results remained stable in the long term. SN - 1460-2210 UR - https://www.unboundmedicine.com/medline/citation/19477971/Long_term_stability_of_dentoalveolar_and_skeletal_changes_after_activator_headgear_treatment_ L2 - https://academic.oup.com/ejo/article-lookup/doi/10.1093/ejo/cjp042 DB - PRIME DP - Unbound Medicine ER -