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KMID : 0896020070370020069
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Korean Journal of Oral and Maxillofacial Radiology
2007 Volume.37 No. 2 p.69 ~ p.77
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The accuracy of the imaging reformation of cone beam computed tomography for the assessment of bone defect healing
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Kang Ho-Duk
Kim Gyu-Tae
Choi Yong-Suk
Hwang Eui-Hwan
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Abstract
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Purpose : To evaluate the accuracy of the imaging reformation of cone beam computed tomography for the
assessment of bone defect healing in rat model.
Materials and Methods : Sprague-Dawley strain rats weighing about 350 gms were selected. Then critical size
bone defects were done at parietal bone with implantation of collagen sponge. The rats were divided into seven groups of 3 days, 1 week, 2 weeks, 3 weeks, 4 weeks, 6 weeks, and 8 weeks. The healing of surgical defect was assessed by multiplanar reconstruction (MPR) images and three-dimensional (3-D) images of cone beam computed tomography, compared with soft X-ray radiograph and histopathologic examination.
Results : MPR images and 3-D images showed similar reformation of the healing amount at 3 days, 1 week, 2
weeks, and 8 weeks, however, lower reformation at 3 weeks, 4 weeks, and 6 weeks. According to imaging-based
methodologies, MPR image revealed similar reformation of the healing amount than 3-D images compare with soft
X-ray image. Among the four threshold values for 3-D images, 400-500 HU revealed similar reformation of the
healing amount. Histopathologic examination confirmed the newly formed trabeculation correspond with imagingbased methologies.
Conclusion : MPR images revealed higher accuracy of the imaging reformation of cone beam computed
tomography and cone beam computed tomography is a clinically useful diagnostic tool for the assessment of bone defect healing. (Korean J Oral Maxillofac Radiol 2007; 37 : 69-77)
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KEYWORD
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Tomography, Cone Beam Computed Bone Defect Healing Parietal Bone
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