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JSM Dentistry

CBCT Imaging in Orthodontics

Editorial | Open Access

  • 1. Postgraduate Orthodontic Program, Arizona School of Dentistry & Oral Health, A.T. Still University, Mesa, Arizona, USA
  • 2. Graduate School of Dentistry, Kyung Hee University, Seoul, Korea
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Corresponding Authors
Dr. Jae Hyun Park, Postgraduate Orthodontic Program, Arizona School of Dentistry & Oral Health, A.T. Still University, Mesa, Arizona, USA, Graduate School of Dentistry, Kyung Hee University, Seoul, Korea
Introduction

For decades, the two-dimensional (2D) lateral cephalometric analysis in orthodontics was the primary tool to study growth and development of craniofacial structures, assess and diagnose orthodontic issues, and plan and evaluate orthodontic treatment [1]. Craniofacial structures are three-dimensional (3D) objects that were often obscured in 2D images. Therefore, 2D lateral cephalograms provided limited information during analysis [1,2]. As the field of orthodontics has evolved, its technology has evolved with it. The introduction of cone-beam computed tomography (CBCT) and computer software in orthodontics has allowed orthodontists to study all aspects of 3D craniofacial structure with more precision [3,4].

Combining CBCT with computer software allows proper representation without distortion of craniofacial structures and provides sophisticated information from three different planes of view: coronal, sagittal, and transverse. Analyses of CBCT images are enhanced with magnification, visual adjustments (grey-scale, contrast, etc.), and cursor-driven measurements [2]. Usually, CBCT imaging is not used in place of conventional dental imaging, rather it is used for specific diagnoses [5].

CBCT imaging is useful in assessing craniofacial anomalies and/or abnormalities via 3D superimposition in order to evaluate growth and development. It is also useful in identifying condylar cortical erosion to assess TMJ disorder [5]. The most common use of CBCT imaging is to allow orthodontists to visualize precise tooth position of supernumerary and impacted teeth, especially impacted canines. In doing so, the exact angulation of impaction and measurement of proximity of adjacent roots allow orthodontists to evaluate and choose vector forces for tooth movement while minimizing root resorption [5-8].

While 2D images can be used to view root resorption, there are limitations because craniofacial structures are often obscured. An accurate knowledge of root position improves the determination of success in orthodontic treatment [5-8]. CBCT is a widely accepted tool in orthodontics and numerous studies have reported the accuracy, reliability, and repeatability of CBCT images [9-11]. However, the use of CBCT and patient exposure to radiation has raised a concern, especially with adolescents. Several studies have determined that effective radiation exposure with CBCT technology is significantly lower than conventional multi-slice CT scans used in medicine [12-16]. In comparison to conventional dental imaging, effective CBCT doses are much higher; however, new technology has allowed CBCT exposure to be adjusted [12-16].

The incorporation of CBCT systems in clinical dentistry, especially orthodontics, has allowed health care providers to assess and diagnose from a different perspective. In orthodontics, CBCT imaging has replaced traditional 2D imaging [17]. This advancement of CBCT technology has contributed to more precise and accurate orthodontic treatment plans compared to decades ago.

Citation

Park JH (2013) CBCT Imaging in Orthodontics. JSM Dent 1: 1002.

REFERENCES

1. Cho HJ. A three-dimensional cephalometric analysis. J Clin Orthod. 2009; 43: 235-52.

2. Scarfe WC, Farman AG, Sukovic P. Clinical applications of cone-beam computed tomography in dental practice. J Can Dent Assoc. 2009; 72: 75-80.

3. Chenin DL, Chenin DA, Chenin ST, Choi J. Dynamic cone-beam computed tomography in orthodontic treatment. J Clin Orthod. 2009; 43: 507-12.

4. Mah JK, Reyes LY, Huang RC, Choo H. Advanced applications of cone beam computed tomography in orthodontics. Semin Orthod. 2011; 17: 57-71.

5. Smith BR, Park JH, Cederberg RA. An evaluation of cone-beam computed tomography use in postgraduate orthodontic programs in the United States and Canada. J Dent Educ. 2011; 75: 98-106.

6. Bedoya MM, Park JH. A review of the diagnosis and management of impacted maxillary canines. J Am Dent Assoc. 2009; 140: 1485-93.

7. Farronato G, Bellincioni F, Colombo M, Falzone D, Sara S, Passaler G, et al. CBCT in orthodontics. CAD/CAM. 2012; 2: 26-9.

8. Agrawal JM, Agrawal MS, Nanjannawar LG, Parushetti AD. CBCT in orthodontics: the wave of future. J Contemp Dent Pract. 2013; 14: 153- 7.

9. Grauer D, Cevidanes LSH, Styner MA, Heulfe I, Harmon ET, Zhu H, et al. Accuracy and landmark error calculation using cone-beam computed tomography-generated cephalograms. Angle Orthod. 2010; 80: 286- 94.

10. Ludlow JB, Gubler M, Cevidanes L, Mol A. Precision of cephalometric landmark identification: cone-beam computed tomography vs conventional cephalometric views. Am J Orthod Dentofacial Orthop. 2009; 136: 312.e1-10.

11. Damstra J, Fourie Z, Huddleston Slater JJ, Ren Y. Accuracy of linear measurements from cone-beam computed tomography-derived surface models of different voxel sizes. Am J Orthod Dentofacial Orthop. 2010; 137: 16.e1-6.

12. Silva MAG, Wolf U, Heinicke F, Bumann A, Visser H, Hirsch E. Conebeam computed tomography for routine orthodontic treatment planning: A radiation dose evaluation. Am J Orthod Dentofacial Orthop. 2008; 133: 640.e1-5.

13. Pauwels R, Beinsberger J, Collaert B, Theodorakou C, Rogers J, Walker A, et al. Effective dose range for dental cone beam computed tomography scanners. Eur J Radiol. 2012; 81: 267-71.

14. Roberts JA, Drage NA, Davies J, Thomas DW. Effective dose from cone beam CT examinations in dentistry. Br J Radiol. 2009; 82: 35-40.

15. Ludlow JB, Davies-Ludlow LE, Brooks SL. Dosimetry of two extraoral direct digital imaging devices: NewTom cone beam CT and Orthophos Plus DS panoramic unit. Dentomaxillofac Radiol. 2003; 32: 229-34.

16. Ludlow JB, Davies-Ludlow LE, Brooks SL, Howerton WB. Dosimetry of 3 CBCT devices for oral and maxillofacial radiology: CB Mercuray, NewTom 3G and i-CAT. Dentomaxillofac Radiol. 2006; 35: 219-26.

17. Baumrind S. The road to three-dimensional imaging in orthodontics. Semin Orthod. 2011; 17: 2-12

Received : 24 Jun 2013
Accepted : 24 Jun 2013
Published : 26 Jun 2013
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