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Class III Twin Blocks: a case series
G Kidner1, A DiBiase, D DiBiase
1Stoke Mandeville Hospital, Buckinghamshire, and John Radcliffe Hospital, Oxford, UK. Giles.Kidner@smh.nhs.uk
Objective:
To evaluate the use of Class III Twin Blocks for the early treatment of Class III malocclusion.
Design:
Retrospective analysis.
Subjects And Method:
14 subjects were consecutively treated with a modified version of the Class III Twin Block appliance. Lateral cephalometric radiographs taken at the start and end of treatment were assessed digitally.
Results:
The mean age of subjects was 10 years and mean treatment time was 6.6 months. The cephalometric analysis of changes during treatment shows proclination of the upper incisors [mean 5.1 degrees, SD 5.1], retroclination of the lower incisors [mean -4.5 degrees, SD 3.9], reduction in angle SNB [mean -1.3 degrees, SD 1.8] and an increase in the maxillary/ mandibular planes angle (mean 2.1 degrees, SD 2.2]. Average cephalometric digitizations and photographs of a clinical case are shown.
Conclusions:
Class III Twin Blocks can be used successfully for early treatment of Class III malocclusion. A randomly allocated prospective study is required to fully evaluate the efficacy of this appliance.