Our aim was to evaluate cephalometrically the preoperative inclination of the incisors in a group of 50 patients with Class III dentofacial deformities whose immediate preoperative lateral cephalometric radiographs were analysed after they had been treated by maxillary advancement. The radiographs were hand-traced by the same operator who made the cephalometric analysis. Mean values for each measurement were compared with the normal values using Student's t-test (p < 0.05). Results showed significantly increased inclination of the upper incisors, with a mean U1-NA angle of 27.58° and a mean U1-PP angle of 116°. The lower incisors were also inclined lingually, with a mean L1-NB angle of 22.53° and a mean IMPA of 83.13°. Thirty-five of the patients had labial inclination of the upper, and 28 lingual inclination of the lower, incisors. Mean inclinations of upper and lower incisors differed from the normal values, and the inclination of the lower incisors was more likely to be decompensated than that of the upper incisors.
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- Cephalometric characteristics of Korean Class III surgical patients and their relationship to plans for surgical treatment.Int J Adult Orthodon Orthognath Surg. 2000; 15: 119-128
- Comparison of incisor inclination in patients with Class III malocclusion treated with orthognathic surgery or orthodontic camouflage.Am J Orthod Dentofacial Orthop. 2009; 135: 146.e1-146.e9
- A cephalometric study of Class II malocclusions treated with mandibular surgery.Am J Orthod Dentofacial Orthop. 2007; 131: 7.e1-7.e8
- Effects of dental decompensation on the surgical treatment of mandibular prognathism.Int J Adult Orthod Orthognath Surg. 1996; 11: 165-180
- Class III surgical-orthodontic treatment: a cephalometric study.Am J Orthod Dentofacial Orthop. 2006; 130: 300-309
- A comparison of outcomes of orthodontic and surgical-orthodontic treatment of Class II malocclusion in adults.Am J Orthod Dentofacial Orthop. 1992; 101: 556-565
- Skeletal anteroposterior discrepancy and vertical type effects on lower incisor preoperative decompensation and postoperative compensation in skeletal Class III patients.Angle Orthod. 2011; 81: 64-74
- A new X-ray technique and its application to orthodontia.Angle Orthod. 1931; 1: 45-66
- A method for cephalometric evaluation.Am J Orthod. 1984; 86: 449-469
- The use of cephalometrics as an aid in the planning and assessing of orthodontic treatment.Am J Orthod. 1960; 46: 721-735
- Effect of maxillary incisor labiolingual inclination and anteroposterior position on smiling profile esthetics.Angle Orthod. 2011; 81: 121-129
- The influence of children's dentofacial appearance on their social attractiveness as judged by peers and lay adults.Am J Orthod. 1981; 79: 399-415
- Orthodontists’ and laypersons’ aesthetic assessment of Class III subjects referred for orthognathic surgery.Eur J Orthod. 2009; 31: 443-448
Published online: December 12, 2011
Accepted: October 3, 2011
© 2011 The British Association of Oral and Maxillofacial Surgeons. Published by Elsevier Inc. All rights reserved.