抄録
Accurate diagnosis and exact treatment planning are very important for successful implant treatment. Especially, pretreatment examination and simulation utilizing computed tomography (CT) can be very effective information sources, and diagnosis by CT image before treatment substantially enhances determination of the treatment plan and safety. It is useful to achieve the above for SIM/Plant (Columbia Scientific, USA), which uses the actual CT scan and reformated CT images combined with computer graphics for measurement and simulation. The purpose of this study was to evaluate the accuracy of measurement tools within the CT images in SIM/Plant. Human mandible shaped master model, which had a hollow structure (outer wall: 3.00 mm thick) simulating cortical and sponge bone, was composed of aluminum. The master model was CT scanned by Legato DUO (GE, USA) in 1.0 mm thickness. The CT data was reformated and transfered to the hard disk of a personal computer for SIM/Plant simulation. Ten dentists measured an external and internal diameter of height (top-bottom) and width (bucco-lingually) on the master model's selected cross sectional images in the personal computer using a SIM/Plant distance measurement tool.
ANOVA showed that the SIM/Plant distance measumement tool demonstrated significant difference (p＜0.05) from the actual size of the master model.
