G Kidner1, A DiBiase, D DiBiase. 1. Stoke Mandeville Hospital, Buckinghamshire, and John Radcliffe Hospital, Oxford, UK. Giles.Kidner@smh.nhs.uk
Abstract
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.
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.
Authors: Mohamed Abdulkarim Khwanda; Ahmad S Burhan; Mohammad Y Hajeer; Mowaffak A Ajaj; Steven Parker; Fehmieh R Nawaya; Omar Hamadah Journal: Cureus Date: 2022-06-13
Authors: Robert Vanlaecken; Michael O Williams; Thomas Razmus; Erdogan Gunel; Chris Martin; Peter Ngan Journal: Prog Orthod Date: 2014-05-02 Impact factor: 2.750