| The caries rate of the first permanent molars differs from domestic reports, to know the caries conditions of the first permanent molars of the pupils in the schools of Beijing Daxing District, and to help study the emphasis of prevention work of caries in students with providing the suggestion, in 2007 we performed oral epidemiology investigation and statistical analysis to 3567 primary school students, who are 7 to 12 years old, in Daxing District, the results are as follows:In the 3567 examinee, there are 582 persons having caries, the rate of which is 16.32%, 13.79% for boys and 18.78% for girls, significantly higher than that of boys; with the age increasing, the caries rate of the first permanent molars rises from 10.03% to 23.12%, which is significantly different among all age groups; the caries rate of people, who brush teeth twice a day or more, is obviously lower than those who do that once a day or less. Thus, age, sex and the frequency of brushing teeth in a day are the most influential factors related to the caries of the first permanent molars.In order to know the conditions of the primary school students oral health behavior in Daxing District, this study selected surveys in total of 23 KAP projects to 3567 students, including oral hygiene behavior, oral health concept, oral health knowledge, etc. The results are as follows:The report rate of oral hygiene behavior, such as oral examination on a regular basis, brushing teeth more than twice every day, tooth brushes head laying on the top is up to 75% or more; and that of often eat sweets or drink sweet drinks is more than 50%. But the report rate of brushing teeth more than 3 min, replacing toothbrushes every 3 months is relatively low, which is less than 50%; that of using toothpicks and dental floss is lower than 10%.The report rate of agreeing that toothpaste with fluoride can reduce the risk of dental caries is lower than 50%, that of recommending using dental floss is lower than 25%, and the report rates of other projects are all over 50%, but lower than 75%.Over 75% primary school students know that brushing teeth has the effect of preventing dental caries, cleaning mouth and whitening teeth. About 50% of them know that brushing teeth has the effect of remove plaque and maintain gingival health. To the knowledge of preventing dental caries approach, over 50% people consider that controlling sweet food could prevent dental caries, however, people who know that it can prevent dental caries by applying compounds with fluoride and adopting pit and fissure sealant are fewer, which are 37.06% and 14.97%, respectively.In this study, 250 children, who are 7 to 12 years old, were selected from the out-patient children in Children Dental Section, Stomatological Center, the Chinese PLA General Hospital in April 2006. By using the Estiseal F light-cured pit and fissure sealant resin and adopting two pretreatment methods of enamel surface, for a total of 400 first permanent molars were treated with pit and fissure sealant, which is Enameloplasty Sealant Technique and Cup-shaped brush Sealant Technique. After six months, one year and a year and a half, it has been done that follow-up visit, review sealant retention and if a secondary caries occur. Comparing both clinical effects of the pit and fissure sealant enamel surface pretreatment technologies, the results are as follows:â‘ The complete reservation rate of EST Group after 0.5, 1 and 1.5 years which were higher than CST group, are worth of clinical use;â‘¡Time is closely related to pit-and-fissure sealant reservation. In this study, 1.5 years later, it is indicated by the losing rate of 10.0% -18.2% that the follow-up visit should be enhanced in the clinical work. It is proposed that it should be reviewed annually after the pit and fissure sealant treatment, and the teeth which the sealant were partially and completely lost should be retreat with the pit and fissure sealant in order to ensure the final clinical effect of dental caries;â‘¢There is statistical significant difference between EST and CST Group, and also among the six-month, 1-year and 1.5-year group. There is no difference between 1-year group and 1.5-year group. It indicates that the rate of loss of pit and fissure sealant changes the fastest in a year after the operation, but a year later we are seeing a gradual and stable trend;â‘£There is no statistical significant difference of the secondary caries of Estiseal F pit and fissure sealant, between EST and CST Group, and among 0.5, 1, 1.5 year group. It indicates that along with Estiseal F, the use of the two pit and fissure methods can both be satisfied to the pit and fissure effect, which could reduce the clinical incidence of secondary caries. If extending the observation time, it should be further observed to see if it remains different results.
|
PDF Full Text Request