Conclusion: The pit and fissure sealant have significant preventive effect on carious teeth.
Conclusion: The pit and fissure sealant have significant preventive effect on carious teeth.
结论：窝沟封闭能有效预防窝沟龋的发生。
Conclusion: The pit and fissure sealant have significant preventive effect on carious teeth.
结论：窝沟封闭能有效预防窝沟龋的发生。