Preliminary clinical application of three-dimensional cephalometric in orthodontics

doi:10.3877/cma.j.issn.2095-655X.2014.01.005

Abstract

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).

Conclusions

CBCT 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.

Key words: Orthodontics, Cone Beam computed tomography, Cephalometry

Bin Chen, Jian Meng, Jing Zhang, Ying Liu. Preliminary clinical application of three-dimensional cephalometric in orthodontics[J]. Chinese Journal of Diagnostics(Electronic Edition), 2014, 02(01): 27-31.

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References 15

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项目	SNA角	SNB角	ANB角	MP-FH角	U1-SN角	L1-MP角	U1-L1角	U1-NA角	L1-NB角	NP-FH角	Y轴角
传统头影	80.15±3.39	80.38±2.53	0.78±2.64	32.14±4.25	108.10±3.34	97.63±3.78	114.27±11.65	26.85±4.35	28.27±3.72	81.35±2.80	66.71±3.96
三维头影	81.47±1.85	80.86±1.87	1.51±1.92	32.96±2.84	108.64±2.75	98.26±2.84	113.96±10.54	28.36±3.46	29.02±2.81	82.04±2.38	67.02±2.61
t值	3.08	1.32	2.63	2.59	1.17	1.46	1.34	3.21	2.68	1.62	1.03
P值	<0.01	>0.05	<0.05	<0.05	>0.05	>0.05	>0.05	<0.01	<0.05	>0.05	>0.05

项目	SNA角	SNB角	ANB角	MP-FH角	U1-SN角	L1-MP角	U1-L1角	U1-NA角	L1-NB角	NP-FH角	Y轴角
传统头影	80.15±3.39	80.38±2.53	0.78±2.64	32.14±4.25	108.10±3.34	97.63±3.78	114.27±11.65	26.85±4.35	28.27±3.72	81.35±2.80	66.71±3.96
三维头影	81.47±1.85	80.86±1.87	1.51±1.92	32.96±2.84	108.64±2.75	98.26±2.84	113.96±10.54	28.36±3.46	29.02±2.81	82.04±2.38	67.02±2.61
t值	3.08	1.32	2.63	2.59	1.17	1.46	1.34	3.21	2.68	1.62	1.03
P值	<0.01	>0.05	<0.05	<0.05	>0.05	>0.05	>0.05	<0.01	<0.05	>0.05	>0.05

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