Correction of the non-linearity of the data from MKG. Usual range of masticatory movement.:—Usual range of masticatory movement—
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概要
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In order to investigate the possibility of improving the distinctive technical characteristics of the MKG, first the output data (a set of primary data) of MKG were corrected by the compensation equation of the MKG Analyzer to obtain a set of secondary data. Then to each positional coordinate of the secondary data, six additional positions that were 2.5mm away, up and down, right and left, and front and back from that position were corrected each to obtain a set of tertiary data. The percentage of error was calculated for each set of data and the results were compared.<BR>1. Each positional coordinate of the primary data was close to the actual positional coordinate at the vicinity of its original position and showed relatively satisfactory linearity. However as the coordinate moved away from the original position it deviated from the actual position and became non-linear.<BR>2. For each positional coordinate of the secondary data, the non-linearity was somewhat improved, but as it moved away from the original position it deviated from its actual position and became non-linear.<BR>3. For each positional coordinate of the tertiary data, the non-linearity had improved greatly compared to the secondary data, and showed linearity.<BR>4. The percentage of error for each positional coordinate of the primary, secondary and tertiary data were 29.5%, 8.7% and 1.6% respectively. The primary data had the largest percentage of error by far, followed by secondary data and tertiary data. Significant differences were found between each two sets of data.<BR>5. From these results, it was concluded that with proper compensation measures the linearity of a MKG that showed non-linearity can be improved to the level similar to or surpassing that of other mandibular movement recording apparatus sold on the market.
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