[Observation of the effectiveness of APFI gel to prevent dental caries].
OBJECTIVE
To observe the effectiveness of APFI Gel applied to pupils to prevent dental caries.


METHODS
2918 cases of 6 to 13 years old pupils from four urban and countryside primary schools were randomly divided into two groups,the experiment group and the control group. By theirs different school and classes and groups, APFI Gel was used to 2 160 cases of the experimental group to prevent dental caries. The control group consisted of 758 cases. The incidence of dental caries of the two groups were observed in the same time and using the same way.


RESULTS
Statistical analysis indicated that the incidence of dental caries in the experimental group decreased by 52.3%,the newly increased DMFT decreased by 60.14% (P<0.01). The incidence of dental caries of the first molar decreased by 52.43%,the newly increased DMFT decreased by 65.52% (P<0.01).


CONCLUSIONS
It is effective to use APFI Gel to prevent caries.
Changsha Stomatological Hospital, Hunan 410005, China.
J L
JL
Guo
H
H
Jin
Y G
YG
Duan
X Q
XQ
Huang
F X
FX
Zu
H B
HB
Wu