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KMID : 0357520090320030271
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Journal of Radiological Science and Technology
2009 Volume.32 No. 3 p.271 ~ p.276
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Study on Measurements of the Mandible BMD According to the ROI Variation
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Tak Jeong-Nam
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Abstract
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The aim of this study was to evaluate the effect of Bone Mineral Density(BMD) at mandible. So, we studied how to measure the BMD at mandible using DEXA(Dual energy X-ray absorptiometry, DEXA) by Horner er al (1996) and knew reproducibility of the measurements. Thirty-five patients (13 men, 22 women, mean age : 25.4 years) were examined using the GE Lunar Prodigy Advance(LUNAR Corporation, madison, USA). They were examined in Semiprone position of their body and true lateral position of their mandible selected the Lumbar lateral mode. We used the custom mode in analysis when ROI (area ). Three ROIs (, , ) were located each at the two different sites of the mandible (angle of mandible and mental symphysis) and BMD was measured. Differences in BMD measurement was statistically compared according to the size and location of ROI. BMD was in men and was in women. BMD at the angle of mandible was in men and was in women. BMD of men at the mental symphysis was and that of women was . With the ROI of , BMD was in men and was in women. With the ROI of , BMD of men was and that of women was . There was a statistically significant difference of BMD according to the size and location of ROI. When measuring mandible BMD, there are good for increasing ROI and locate between ramus and mental symphysis. Especially following exam, refer to same size and location with fore exam. According to study which measure mandible BMD, It’s correct to measure better a portion of mandible then whole of BMD. Using DEXA protocol is studied good for the additional study to compare the BMD at mandible. Later date, It will be good for measurement value in implant and bone graft quantitatively. Using DEXA method gain BMD threshold value in korean.
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KEYWORD
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Mandible, BMD, DEXA, ROI
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