It is well known that the mandibular arch is a major determining factor in orthodontic treatment because it offers significant limitations that cannot be overlooked.
Throughout the history of orthodontics, many authors have attempted to assess the stability of the lower arch expansion. Most research suggests that we should not exceed certain limits during expansion, or change the patient arch form, because otherwise the stability of the results could be compromised.
In 1990, Dwight Damon developed a theory stating that the low friction and light forces produce biologically more stable results, saying the mandibular intercanine width does not change significantly with his system.
The aim of this study was to compare the changes in the shape and size of the mandibular arch and the intercanine width at the beginning and at the end of orthodontic treatment, in patients treated with low-friction Damon fix appliances without extractions.
(Rev Esp Ortod. 2016;46(3):130-135)