Arch width changes in extraction and nonextraction...[Angle Orthod. 2005] - PubMed Result: "Arch width changes in extraction and nonextraction treatment in class I patients.
Aksu M, Kocadereli I.
Department of Orthodontics, Faculty of Dentistry, Hacettepe University, Sihhiye, Ankara, Turkey. mugepeh@hacettepe.edu.tr
The aim of this retrospective study was to examine the dental arch width changes of extraction and nonextraction treatment in Class I patients. The study was performed on pretreatment and posttreatment dental casts of 60 patients (30 extraction and 30 nonextraction). The mean ages were 14.3 +/- 2.02 years for the extraction group and 14.1 +/- 2.9 years for the nonextraction group. The maxillary and mandibular crowding was -6.7 +/- 3.1 and -6.3 +/- 2.8 mm for the extraction group and -4.5 +/- 3.6 and -2.1 +/- 3.5 mm for the nonextraction group, respectively. The intercanine and intermolar arch width measurements were measured using a digital caliper. Paired samples t-test was used to evaluate the treatment changes within each group. To compare the changes between groups, independent samples t-test was performed. At the start of treatment, the maxillary and the mandibular intercanine and intermolar widths of both groups did not differ statistically. At the end"
Subscribe to:
Post Comments (Atom)
1 comment:
We need to ask if any form of retention was used and for how long. The shape of the mouth is influenced by function and if the tongue and other muscles are not supporting the new tooth and jaw position the result will be unstable. It would be interesting to see a study where long term retainers are being used as is the norm in most orthodontic treatment.
Post a Comment