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ITALIAN JOURNAL OF MAXILLOFACIAL SURGERY
A Journal on Maxillofacial Surgery
Official Journal of the Italian Society of Maxillofacial Surgery
Italian Journal of Maxillofacial Surgery 2012 December;23(1-3):39-48
3D cephalometric mean values in a postsurgical esthetically balanced Italian sample
Pironi M. 1, Bianchi A. 2, Lancellotti L. 2, Giorgini F. 2, Morselli-Labate A. M. 3, Marchetti C. 4
1 Contract Professor in Orthodontics, Post-graduate School of Maxillofacial Surgery, University of Bologna, Bologna, Italy;
2 Oral and Maxillofacial Surgery Unit, S.Orsola-Malpighi University Hospital, Bologna, Italy;
3 Department of Clinical Medicine, University of Bologna; Italy;
4 Professor of Maxillofacial Surgery, University of Bologna, Italy
Aim. The advent of cone-beam computed tomography (CBCT) in the maxillofacial field has opened new opportunities for 3-dimensional (3D) cephalometric analysis and improvements in virtual planning and simulation of surgical treatment. In this article, we present the 3D cephalometry analysis that we developed and the mean values of our postorthognathic surgery 3D cephalometry analysis of 40 Italian patients who have all reached a dental and skeletal class I occlusion and a good aesthetic appearance.
Methods. We selected 40 patients treated with orthognathic surgery at the Oral and Maxillofacial Surgery Unit of the S.Orsola-Malpighi University Hospital in Bologna. They have achieved a Class I dental occlusion and good aesthetic balance by undergoing orthodontic and surgical treatment. The 40 corresponding postoperative CBCTs taken 6 months after surgery have been analyzed. A 3D cephalometry analysis were used with the identification of 33 landmarks in 25 measurements.
Results. The 3D mean values compared to the 2D standards demonstrated a moderate degree of maxillo-mandibular protrusion, according to Italian aesthetic taste: the mean distance of the Point A and the Pogonion from McNamara plane are 4.2±3.6 mm and 6.0±6.4 mm, respectively, compared with the 2D McNamara standards of 2±2 mm and 0±2 mm.
Conclusion. The 3D mean values of a group of Italian adults submitted to an orthognathic surgery procedures to normalize dento-skeletal malocclusion seem to us useful in clinical practice as a reference for diagnosis of dento-skeletal dysmorphism and planning of surgical treatment.