:: Volume 10, Issue 4 (12-2021) ::
Int J Med Invest 2021, 10(4): 156-163 Back to browse issues page
Investigating The Effect Of Different Inclinations Of Maxillary Occlusal Plane On Estimating The Size Of Gutta-Percha Markers In Cbct Images: An In-Vitro Study
Hoda Abbaspour Tehrani Fard , Ladan Hafezi , Amirreza Mehdizadeh , Niloofar Ghadimi , Afsoon Jalali Ara , Ahmadreza Talaipour
Abstract:   (1381 Views)
Background: Due to the importance of CBCT linear measurement accuracy and the lack of standard axial plane inclination, this study aimed to investigate the effect of axial plane inclination changes on linear measurement accuracy in reconstructed maxillary CBCT images. Materials and Methods: In the present experimental (in-vitro) study, CBCT images were obtained from 3 dry human maxillae. In this study, radiopaque markers (gutta-percha) were used as landmarks. First, real measurements were made by a practitioner using a digital caliper. Then, CBCT was taken in 5 different inclinations of the axial plane (parallel to the occlusal plane as the standard plane and ±7 ̊and ±14 ̊). One observer performed radiographic linear measurements. The linear measurements were a total of 540 samples according to 36 markers and 5 different inclinations and 3 replications. Physical and radiographic linear measurements were compared to evaluate the accuracy of linear measurements on 5 different inclinations. Data were analyzed using SPSS software version 16 and ANOVA test. Results: A total of 540 samples with 5 different inclinations were evaluated. The actual size of the marker length, inclinations estimation and difference estimation showed that the maximum and minimum differences were related to inclinations of -7 ̊ by 0.009 and inclinations of +7 ̊ by 0.002, respectively. However, ANOVA test showed that this estimate of differences in various inclinations was not statistically significant (P >0.05). Conclusion: It seems that changing the inclination from 0 to -14 does not affect estimating the real differences of marker length with the inclination. Therefore, it can be concluded that all vertical measurements are accurate clinically.
Keywords: Cone beam computed tomography, Linear measurements, Maxilla
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Type of Study: Research | Subject: General
References
1. 1- Ludlow JB, Laster WS, See M, et al. Accuracy of measurements of mandibular anatomy in cone beam computed tomography images. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2007 Apr; 103(4): 534-42. 2- Al-Rawi B, Hassan B, Vandenberge B, et al. Accuracy assessment of three-dimensional surface reconstructions of teeth from cone beam computed tomography scans. J Oral Rehabil. 2010 May; 37(5): 352-8. 3- Waltric KB, de Abreu Junior MJ, Correa M, et al. Accuracy of linear measurements and visibility of the mandibular canal on cone beam computed tomography images with different voxel sizes: An in-vitro study. J Periodontal. 2012 Mar; 32(5): 367-70. 4- Tomasi C, Bressan E, Corazza B, et al. Reliability and reproducibility of linear mandible measurement with the use of a cone beam computed tomography and two object inclinations. Dentomaxillofac Radiol. 2011 May; 40(2): 244-50. 5- Kobayashi K, Shimoda S, Nakagawa Y, et al. Accuracy in measurements of distance using limited cone beam computerized tomography. Int J Oral Maxillofac Implants. 2004 Mar-Apr; 19(2): 228-31. 6- Worthington P, RubensteinJ, Hatcher DC. The role of cone beam computed tomography in the planning and placement of implants. J Am Dent Assoc. 2010 Oct; 141: 19-24. 7- Moreira CR, Sales MA, Lopes M, et al. Assessment of linear and angular measurements on three-dimensional cone- beam computed tomographic images. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2009 Sep; 108(3): 430-6. 8- Medelnik J Hertrich K, Steinhauser-Andresen, et al. Accuracy of anatomical landmark identification using different CBCT- and MSCT- based 3D images: an in-vitro study. J Orofac Orthop. 2011 Aug; 72(4):261-78. 9- Sokhon S, Nasseh I, Noujeim M. Using cone- beam computed tomography to determine safe regions for implant placement. Gen Dent. 2011 Mar-Apr; 59(2): 72-7. 10- Tustumi K, Chikui T, Okamura K, et al. Accuracy of linear measurement limits of thin objects with locations in the fields of view. Int J Oral Maxillofac Implants. 2011 Jan-Feb; 26(1): 91-100. 11- Al-Ekrish AA and Ekram M. A comparative study of the accuracy and reliability of multidetector computed tomography and cone- beam computed tomography in the assessment of dental implant site dimensions. Dentomaxillofac Radiology. 2011; 40: 67-75. 12- Kohavi D, Bar-ziv J, Marmary Y. Effect of axial plane deviation on cross-sectional height in reformatted computed tomography of the mandible. DentOmaxillofac Radiology. 1997; 26: 189-191. 13- Shokri A, Khajeh. In vitro comparison of the effect of different slice thicknesses on the accuracy of linear measurements on cone beam computed tomography images in implant sites. J Craniofac Surg. 2015 Jan; 26(1):157-60. 14- Fatemitabar SA, Nikgoo A. Multichannel computed tomography versus cone-beam computed tomography: linear accuracy of in vitro measurements of the maxilla for implant placement. Int J Oral Maxillofac Implants. 2010 May-Jun; 25(3):499-505. 15- Bassam H, Van der Stelt, Sanderink G. Accuracy of three-dimensional measurements obtained from cone beam computed tomography surface-rendered images for cephalometric analysis: influence of patient scanning position. Eur J Orthod. 2009 Apr; 31(2): 129-34. 16- Lascala CA, Panella J, Marques MM. Analysis of the accuracy of linear measurements obtained by cone beam computed tomography (CBCT-New Tom). Dentomaxillofacial Radiol. 2004 Sep; 33(5): 291-4. 17- Sheikhi M, Horbanizadeh S, Abdinian M, Goroohi H, Badrian H. Accuracy of linear measurement of Gallileous cone beam computed tomography in normal and different head positions. Int J Dent. 2012; 2012: 214954.


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