OBJECTIVE:The present study was to investigate the effects of combined application of lanthanum,cerium and fluoride-contained gel on root surface caries.METHODS:2000ppm lanthanum.cerium and fluoride-contained gels were used by various procedures to treat 164 teeth with root surface caries.RESULTS:The six months follow-up data revealed that combined procedure showed a better effect than each kind of trace element used alone.CONCLUSION:The study indicated that combined F/La(Ce) applying procedure has a potential value on the carious resisted root surface.
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