1) Conclusion: The deciduous tooth caries incidence of 5 year old children is high in Yunnan.

2) Young permanent tooth and deciduous tooth which have high pulp horn.

3) Some had different degree defect of dentition, deciduous tooth retention, caries or periodontitis.

4) Objective: To investigate the deciduous tooth caries experience of 5 year old children in Yunnan province.

5) Premature loss of deciduous tooth or teeth can often destroy the integrity of normal occlusion.

6) Root resorption of deciduous tooth without permanent tooth germ was significantly delayed than the deciduous tooth with permanent tooth germ.

7) Objective : To observe the clinical therapeutic effect of deciduous tooth periapicalitis with dry pipe drug treatment.

8) Methods:With the help of vacuum pressure, transparent and prototyping space maintainer was made,[http:///deciduous tooth.html] which was applied to maintain the space of the premature-loss deciduous tooth.

9) The permanent tooth germ plays an important role in physiological root resorption of deciduous tooth, but not the alone factor.

10) As I recalled, it was Liu Li's thoughtfulness in keeping her daughter's umbilical cord and deciduous tooth as well as her toughness and pride that moved me.

11) RESULTS:IL-6 expression was negative in adult dog while positive in periodontium of deciduous tooth and alveolar bone.