Cephalometric Evaluation of Maxillary Incisors Torque and Vertical Changes Utilizing Standard Edgewise Mechanics

In 1995 Gebeck & Merrifield studied a successful and unsuccessful treated Class I II’s samples; they found -1.33 mm intrusion in the former 0.80 extrusion latter. The purpose of this article was to perform cephalometric evaluation maxillary incisors torque vertical changes. We sample 129 patients, 30 males 99 females, taken from Charles H. Tweed Foundation Long Term Study, at pretreatment mean age 12.93 years, posttreatment 16.19 years follow up post retention 29.83 13.88 interval. records were collected private practitioners across North American continent who used Standard Edgewise Mechanics members Foundation. All patients II whites with extraction 4 premolars. an Upper anterior incisal edge PP linear measurement 28.7 29.2 mm, +0.53 (p<0.019) posttreatment. average 1 SN angle 103.2 ° 100.1° posttreatment, -3.2° (p<0.000), 111.0° 108.9°, -2.2° three them statistically significant. Conversely, commissure not. four measurements also significant up, upper anteriors kept losing after less surface below commissure. Some loss can be expected while treating extractions premolars, therefore, incisor inclination increase change by itself cannot determine success treatment.