Effect of oral hygiene instruction and professional toothcleaning on caries and gingivitis in schoolchildren.

The preset study was performed to assess the effect on caries and gingivitis of plaque control measures such as oral hygiene instruction, toothcleaning practice and professional toothcleaning. 104 children, 13-14 years old, participated in the trial. Prior to the start of the preventive treatment all children were examined regarding oral hygiene, gingivitis and caries. The caries examintion was limited to the proximal surfaces of molars and premolars. Following this baseline examination the children were randomly divided into two treatment groups A, and B. Both groups of children were recalled for professional toothcleaning once every 2 weeks during an 18-month period. In each child the professional toothcleaning was restricted to either the right or the left jaws by random selection. In addition, the children of Group A at each recall appointment received careful oral hygiene instruction and practice in proper toothcleaning methods. In conjunction with the professional toothcleaning an abrasive paste was used including fluoride. The children were re-examined 18 months after the baseline examination. The result of the present investigation demonstrated that professional toothcleaning repeated every second and week is a prophylactic measure which in children substantially improves the oral hygiene status, and effectively reduces clinical signs of gingivitis and caries. It was also observed that while oral hygiene instruction and practice in proper toothcleaning techniques reduced plaque and gingivitis, no such effect could be detected regarding the development of caries.