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http://dx.doi.org/10.5624/isd.2013.43.1.31

Normal range of facial asymmetry in spherical coordinates: a CBCT study  

Yoon, Suk-Ja (Department of Oral and Maxillofacial Radiology, School of Dentistry, Dental Science Research Institute, Chonnam National University)
Wang, Rui-Feng (Research Laboratory Specialist Intermediate, Department of Biologic and Material Sciences, School of Dentistry, University of Michigan)
Na, Hee Ja (Department of Dental Hygiene, Honam University)
Palomo, Juan Martin (Department of Orthodontics, School of Dental Medicine, Case Western Reserve University)
Publication Information
Imaging Science in Dentistry / v.43, no.1, 2013 , pp. 31-36 More about this Journal
Abstract
Purpose: This study aimed to measure the bilateral differences of facial lines in spherical coordinates from faces within a normal range of asymmetry utilizing cone-beam computed tomography (CBCT). Materials and Methods: CBCT scans from 22 females with normal symmetric-looking faces (mean age 24 years and 8 months) were selected for the study. The average menton deviation was $1.01{\pm}0.66$ mm. The spherical coordinates, length, and midsagittal and coronal inclination angles of the ramal and mandibular lines were calculated from CBCT. The bilateral differences in the facial lines were determined. Results: All of the study subjects had minimal bilateral differences of facial lines. The normal range of facial asymmetry of the ramal and mandibular lines was obtained in spherical coordinates. Conclusion: The normal range of facial asymmetry in the spherical coordinate system in this study should be useful as a reference for diagnosing facial asymmetry.
Keywords
Cone-Beam Computed Tomography; Imaging; Three-Dimensional; Facial Asymmetry;
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1 Fisher NI, Lewis T, Embleton BJ. Statistical analysis of spherical data. Cambridge: Cambridge University Press; 1993. p.17-28
2 Leong P, Carlile S. Methods for spherical data analysis and visualization. J Neurosci Methods 1998; 80 : 191-200.   DOI   ScienceOn
3 Thaller B. Advanced visual quantum mechanics. New York: Springer; 2005. p. 1-56.
4 Allen TR, Kupfer JA. Application of spherical statistics to change vector analysis of landsat data: Southern Appalachian spruce-fir forests. Remote Sens Environ 2000; 74 : 482-93.   DOI   ScienceOn
5 Yu P, Grant PE, Qi Y, Han X, Segonne F, Pienaar R, et al. Cortical surface shape analysis based on spherical wavelet. IEEE Trans Med Imaging 2007; 26 : 582-97.   DOI   ScienceOn
6 Cuartero A, Armesto J, Rodriguez PG, Arias P. Error analysis of terrestrial laser scanning data by means of spherical statistics and 3D graphs. Sensors (Basel) 2010; 10 : 10128-45.   DOI
7 Haraguchi S, Takada K, Yasuda Y. Facial asymmetry in sub- jects with skeletal Class III deformity. Angle Orthod 2002; 72 : 28-35.
8 Ferguson JW. Cephalometric interpretation and assessment of facial asymmetry secondary to congenital torticollis. The significance of cranial base reference lines. Int J Oral Maxillofac Surg 1993; 22 : 7-10.   DOI   ScienceOn
9 Katsumata A, Fujishita M, Maeda M, Ariji Y, Ariji E, Langlais RP. 3D-CT evaluation of facial asymmetry. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2005; 99 : 212-20.   DOI   ScienceOn
10 Park SH, Yu HS, Kim KD, Lee KJ, Baik HS. A proposal for a new analysis of craniofacial morphology by 3-dimensional computed tomography. Am J Orthod Dentofacial Orthop 2006; 129 : 600.e23-34.
11 Cavalcanti MG, Vannier MW. Quantitative analysis of spiral computed tomography for craniofacial clinical applications. Dentomaxillofac Radiol 1998; 27: 344-50.   DOI   ScienceOn
12 Periago DR, Scarfe WC, Moshiri M, Scheetz JP, Silveira AM, Farman AG. Linear accuracy and reliability of cone beam CT derived 3-dimensional images constructed using an orthodontic volumetric rendering program. Angle Orthod 2008; 78 : 387-95.   DOI   ScienceOn
13 Yoon SJ, Lim HJ, Kang BC, Hwang HS. Three dimensional CT analysis of facial asymmetry. Korean J Oral Maxillofac Radiol 2007; 37 : 45-51.
14 Hwang HS, Yuan D, Jeong KH, Uhm GS, Cho JH, Yoon SJ. Three-dimensional soft tissue analysis for the evaluation of facial symmetry in normal occlusion individuals. Korean J Orthod 2012; 42 : 56-63.   DOI   ScienceOn
15 Alavi DG, BeGole EA, Schneider BJ. Facial and dental arch asymmetries in Class II subdivision malocclusion. Am J Orthod Dentofacial Orthop 1988; 93 : 38-46.   DOI   ScienceOn
16 Peck S, Peck L, Kataja M. Skeletal asymmetry in esthetically pleasing faces. Angle Orthod 1991; 61 : 43-8.
17 Ferrario VF, Sforza C, Miani A Jr, Serrao G. Dental arch asymmetry in young healthy human subjects evaluated by Euclidean distance matrix analysis. Arch Oral Biol 1993; 38 : 189-94.   DOI   ScienceOn
18 Ras F, Habets LL, van Ginkel FC, Prahl-Andersen B. Method for quantifying facial asymmetry in three dimensions using stereophotogrammetry. Angle Orthod 1995; 65 : 233-9.
19 Ferrario VF, Sforza C, Miani A, Tartaglia G. Craniofacial morphometry by photographic evaluations. Am J Orthod Dentofacial Orthop 1993; 103 : 327-37.   DOI   ScienceOn
20 Farkas LG. Anthropometry of the head and face. 2nd ed. New York: Raven Press; 1994. p. 103-11.
21 Hwang HS, Hwang CH, Lee KH, Kang BC. Maxillofacial 3- dimensional image analysis for the diagnosis of facial asymmetry. Am J Orthod Dentofacial Orthop 2006; 130 : 779-85.   DOI   ScienceOn
22 Baek SH, Cho IS, Chang YI, Kim MJ. Skeletodental factors affecting chin point deviation in female patients with class III malocclusion and facial asymmetry: a three-dimensional analysis using computed tomography. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2007; 104 : 628-39.   DOI   ScienceOn
23 Tuncer BB, Ataç MS, Yüksel S. A case report comparing 3-D evaluation in the diagnosis and treatment planning of hemimandibular hyperplasia with conventional radiography. J Craniomaxillofac Surg 2009; 37 : 312-9.   DOI   ScienceOn
24 Vezzetti E, Calignano F, Moos S. Computer-aided morphological analysis for maxillo-facial diagnostic: a preliminary study. J Plast Reconstr Aesthet Surg 2010; 63 : 218-26.   DOI   ScienceOn
25 Kim EJ, Palomo JM, Kim SS, Lim HJ, Lee KM, Hwang HS. Maxillofacial characteristics affecting chin deviation between mandibular retrusion and prognathism patients. Angle Orthod 2011; 81 : 988-93.   DOI   ScienceOn
26 Yoon SJ, Wang RF, Hwang HS, Kang BC, Lee JS, Palomo JM. Application of spherical coordinate system to facial asymmetry analysis in mandibular prognathism patients. Imaging Sci Dent 2011; 41 : 95-100.   DOI   ScienceOn