Abstract
A comparative study was conducted of the biting force of children who had not suffered from caries with those who had slight caries. At the same time, the group which had experienced caries was further investigated after crown restoration.
The subjects totaled 96.38 of those,20 boys and 18 girls had healthy teeth; 58 others,30 boys and 28 girls, had been treated by filling. These two groups were aged 3-6. Filling was performed after cavity preparation using adhesive composit resin. These were also then treated with occulusal ajustment and polishing. In some cases, we used a calcium hydroxide preparation for the indirect pulp capping.
The biting force was measured with the biting force measuring apparatus MPM-3000 (NIHON KOHDEN).
The results were summerized as follows.
1) The biting force for the healthy group was as follows: 20.1±1.9kg for the right second deciduous molar (below: right E), for the left second deciduous molar (below: left E) 19.5±2.4kg, the right first deciduous molar (below: right D) 18.9±2.4 kg, and the left first deciduous molar (below: left D) was 18.3±2.8kg. The values were slightly higher for the second deciduous molars.
2) Comparing the biting force before and after treatment for the group treated by filling, right E, left E, right D and left D were 14.5±3.7 kg,14.7±35 kg,13.9±2.7 kg and 14.2±3.1 kg before treatment, and 18.8±2.5kg,18.4±2.5 kg,17.8±2.3 kg and 17.3±2.7 kg after treatment respectively. In all cases, the value after treatment was significantly higher than before treatment (p<0.01).
3) The relative biting force for the group due to have fillings, compared with that of the healthy group, was as follows: 72.6% for right E,75.4% for left E,73.5% for right D and 77.6% for left D. The average was 74.8±2.2%.
4) The relative biting force of those who were treated with fillings was as follows: 93.5% for right E,94.4% for left E,94.2% for right D and 94.5% for left D. The average was 94.2±0.5%.
