Abstract：Objective To evaluate the clinical application of 3D cephalometric in orthodontics and compare conventional cephalometric with 3D cephalometric, which reconstructed by cone beam computed tomography (CBCT) images. Methods From May 2012 to December 2012,there were 13 patients going with orthodontic therapy, among which 5 patients with severe dental maxillofacial malocclusion and 8 patients with impacted tooth. All patients were detected by regular pantomography and lateral cephalogram, then CBCT scans with consent. All patients were detected by 3D cephalometric analytics with professional software compared with conventional cephalometric. Results 3D constructed CBCT form showed more accurate images.Compared with 2D,3D cephalometric measurements showed differences in ANB,MP-FH,L1-NB,SNA,U1-NA parameters(t=2.63,2.59,2.68,3.08,3.21;P<0.05),there was no significant difference between other parameters.(t=1.32,1.17,1.46,1.37,1.62,1.03;P＞0.05). ConclusionsCBCT combined with 3D cephalometric takes great advantage to conventional cephalometric. It has important clinical guidance to establish treatment scheme for patients with dental maxillofacial deformity.
[1]马绪臣.口腔颌面锥形束CT的临床应用[M]. 北京:人民卫生出版社,2011:24. [2]Broadbent BH.A new x-ray technique and its application to orthodontia[J]. Angle Orthod, 1931, 1(2):45-66. [3]Netherway DJ,Abbott AH,Gulamhuseinwala N,et al.Three-dimensional computed tomography cephalometry of plagiocephaly:asymmetry and shape analysis[J]. Cleft Palate Craniofac J,2006,43(2):201-210. [4]杨志寅.现代医学科学发展中的缺憾与思考[J].中华诊断学电子杂志,2013,1(1):1-7. [5]Mazzo P,Procacci C,Tacconi A,et al.A new volumetric CT machine for dental imaging based on the cone beam technique:preliminary results[J]. Eur Radiol,1998, 8(9):1558-1564. [6]De Vos W, Casselman J, Swennen GR. Cone-beam computerized tomography (CBCT) imaging of the oral and maxillofacial region: a systematic review of the literature[J].Int J Oral Maxillofac Surg,2009,38(6):609-625. [7]衡士超,程勇,李波,等.锥形束CT结合simplant软件在颌面部三维测量中的初步研究[J].口腔医学研究,2011,27(1):60-63. [8]Gribel BF, Gribel MN, Frazao DC,et al. Accuracy and reliability of craniometric measurements on lateral cephalometry and 3D measurements on CBCT scans[J]. Angle Orthod, 2011,81(1):26-35. [9]Lagravere MO, Carey J, Toogood RW, et al. Three-dimensional accuracy of measurements made with software on cone-beam computed tomography images[J]. Am J OrthodDentofacial Orthop, 2008,134(1):112-116. [10]Olmez H,Gorgulu S,Akin E, et al. Measurement accuracy of a computer-assisted three-dimensional analysis and a conventional two-dimensional method[J].Angle Orthod,2011,81(3):375-382. [11]De Oliveira AE, Cevidanes LH, Phillips C, et al. Observer reliability of three-dimensional cephalometric landmark identification on cone-beam computerized tomography[J].Oral Surg Oral Med Oral Pathol Oral Radiol Endod,2009,107(2):256-265. [12]Kumar V, Ludlow J, Soares Cevidanes LH, et al. In vivo comparison of conventional and cone beam CT synthesized cephalograms[J].Angle Orthod,2008,78(5):873-879. [13]Van Vlijmen OJ, Berge SJ, Swennen GR, et al. Comparison of cephalometric radiographs obtained from cone-beam computed tomography scans and conventional radiographs[J].Int J Oral Maxillofac Surg, 2009,67(1):92-97. [14]Yitschaky O, Redlich M, Abed Y, et al. Comparison of common hard tissue cephalometric measurements between computed tomography 3D reconstruction and conventional 2D cephalometric images[J]. Angle Orthod, 2011,81(1):11-16. [15]Moshiri M, Scarfe WC, Hilgers ML, et al. Accuracy of linear measurements from imaging plate and lateral cephalometric images derived from cone-beam computed tomography[J]. Am J Orthod Dentofacial Orthop,2007,132(4): 550-560.
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