Assessment of Cancellous Bone of Mandible By Multifunctional Panoramic X-Ray Machine

Kyung, Ko Jae; Duk, Kim Jae

Abstract

PURPOSE: To evaluate the bone densities measured on copper-equivalent image of cross sectional view of mandibular edentulous premolar area obtained by multifuctional panoramic x-ray machine, PM 2002 CC with transversal slicing system.
MATERIALS AND METHODS
Panoramic cross sectional views with 8mm focal layer of aluminum step and blocks, of hydroxyapatite(HA) step, 6 HA blocks and copper step wedge having 0.03mm thickness of each step, and of 3 bone blocks cutted by 8mm thickness mesiodistally and a dry mandible with copper step wedge were taken by using transversal slicing system in PM 2002 CC. All reference-equivalent images were made and analyzed by NIH image program.
RESULTS
The average copper-equivalent value of cancellous bone of bone blocks on the panoramic cross sectional view was 0.026+/-0.020mmCu. The calculated average bone density was 0.38g/cm2. There was no significant difference(P>0.1) between the bone densities on intraoral digital view and on the panoramic digital cross sectional view.
CONCLUSION
The copper-equivalent image of panoramic digital cross sectional view obtained by PM 2002 CC with very thin copper step wedge was supposed to be useful to measure the bone density of cancellous bone of mandible at the premolar edentulous area.