Evaluation of anteroposterior and vertical stability 25years after Angle classII division1 treatment with cervical headgear.

Abstract

The goal was to investigate long-term (minimum 20years) skeletal and dental changes in Angle classII division1patients treated with full-fixed orthodontic appliances and cervical pull headgear. Alongitudinal retrospective study was performed with 20orthodontic patients, who were treated exclusively by one experienced clinician and whose treatment had been completed aminimum of 20years ago. Former patients who had been treated from the mid-1970s to the early 1990s were actively sought. After the recall, 20patients agreed to participate in the study. Lateral cephalometric radiographs at pretreatment (T1), posttreatment (T2), and long-term follow-up (T3) were digitized and measurements were performed. Angular variables used were SNA, SNB, ANB, OcclPl-FH, PalPl-FH, GoMe-FH, 1‑NA, and Yaxis. Linear measures were A‑NPerp, Pg-NPerp, 1‑NAmm, Wits, and LAFH. From T1 to T2, asignificant reduction (p < 0.01) in ANB angle from 4.70 to 2.48° and in Wits value from 3.42 to 0.98 mm were observed. It was also noticed asignificant increase (p < 0.01) in LAFH from 62.02 to 67.39 mm, probably due to normal facial growth. From T2 to T3, these variables remained stable. No significant changes were observed for any other measure in any of the periods studied. In the assessed sample, Angle classII division 1patients treated with cervical pull headgear presented cephalometric outcome stability of treatment, even after along-term follow-up of amean of 25years postretention.