Abstract
The aim of this study was to assess trabecular bone morphology via magnetic-resonance imaging (MRI) using microcomputed tomography (µCT) as the control group. Porcine bone samples were scanned with T1-weighted turbo spin echo sequence imaging, using TR 25 ms, TE 3.5 ms, FOV 100 × 100 × 90, voxel size 0.22 × 0.22 × 0.50 mm, and scan time of 11:18. µCT was used as the control group with 80 kV, 125 mA, and a voxel size of 16 µm. The trabecular bone was segmented on the basis of a reference threshold value and morphological parameters. Bone volume (BV), Bone-volume fraction (BvTv), Bone specific surface (BsBv), trabecular thickness (TbTh), and trabecular separation (TbSp) were evaluated. Paired t-test and Pearson correlation test were performed at p = 0.05. MRI overestimated BV, BvTv, TbTh, and TbSp values. BsBv was the only parameter that was underestimated by MRI. High statistical correlation (r = 0.826; p < 0.05) was found for BV measurements. Within the limitations of this study, MRI overestimated trabecular bone parameters, but with a statistically significant fixed linear offset.
Highlights
As far as dental-implant planning is concerned, special attention is given to trabecular-bone assessment
Samples were scanned with magnetic-resonance imaging (MRI), and μCT scans were used as reference values
Standard deviation) in trabecular-bone volume measured by μCT and MRI
Summary
As far as dental-implant planning is concerned, special attention is given to trabecular-bone assessment. According to the classification of Lekholm and Zarb [1], the jaw bone may either present cortical bone with different thickness or trabecular bone with variable microarchitecture. In this sense, recent studies showed that cortical thickness influences the primary stability of dental implants [2,3]. Successful implant treatment is related to bone volume, and to the micromorphology of trabeculae, and how they are arranged and connected to each other [4]. Cone-beam computed tomography (CBCT) is the method of choice for bone assessment
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