RESUMEN
A cephalometric radiographic study was carried out to measure the possible dentofacial vertical changes that might be caused by mesial movement of anchor molars during canine retraction with maximum intraoral anchorage. The sample composed of 15 preoperative and post-operative lateral cephalometric radiographs and study models for patients having class 11 division 1 malocclulusion and their treatment necessitated premolar extraction and canine retraction. Their ages ranged between 16 to 23 years while the average treatment time to complete canine retraction was 6 months. The results showed significant mesial molar tipping, noticeable but statistically unsignificant anticlock wise rotation of the occlusal plane and increase of the lower anterior facial high as measured by ANS-Me linear measurement and ANS-Xi-Pm angle. Also, negligible increase of the mandibular plane steepness and incisal over bite were observed