Vertical Skeletal Changes after Extraction and Nonextraction Orthodontic Treatment

Abstract Objectives Due to the constant battle regarding the controversial topic of orthodontic extraction, this study aims to assess the changes in vertical dimensions of patients treated with premolar extractions compared with nonextraction orthodontic patients. Materials and Methods A sample of 60 borderline patients were recruited and divided into extraction and nonextraction groups. Eleven pretreatment cephalometric measurements were recorded using WebCeph and patients were followed-up until the completion of treatment. Statistical Analysis Intragroup and intergroup comparisons were made using paired t -test and two-sample independent t -test, respectively. The joint significance of differences was measured using F-tests. Results The intragroup comparison revealed that in the extraction group, the vertical dimension was significantly increased posttreatment for four cephalometric measurements, that is, mandibular plane angle ( p