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  • Title: Long-term follow-up of patients with a skeletal Angle Class III relationship treated with chin caps.
    Author: Uslu Ö, Akcam MO.
    Journal: World J Orthod; 2009; 10(4):317-22. PubMed ID: 20072749.
    Abstract:
    AIM: To evaluate the long-term result of chin-cap treatment in patients with a skeletal Angle Class III relationship due to mandibular prognathism. MATERIAL AND METHODS: Records of nine patients (five girls and four boys) with a mean age of 10.8 ± 1.6 years at the start of treatment were retrieved from the archives. The records comprised lateral cephalograms, intra- and extraoral photographs, and dental casts. The subjects were recalled at 6.1 ± 1.5 years after the completion of active orthodontic treatment. Cephalometric measurements from the treatment's beginning (T1), end (T2), and follow-up (T3) were calculated by using PorDios software. Subjects with a positive overjet at T3 were grouped as stable, and those with a negative overjet were grouped as relapse. Differences between the two groups were analyzed by repeated measures analysis of variance (ANOVA) and the Duncan test. RESULTS: Five individuals maintained a positive overjet at T3, while four relapsed as indicated by a negative overjet. SNA increased in the stable group between T2 and T3 but not in the relapse group. CONCLUSION: About half of the young individuals with a mandibular prognathism treated with a chin cap relapsed over time. The relapse seemed to originate from skeletal rather than dentoalveolar changes.
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