WhyareKid’sTeethSoYellow?（转贴）MyChild’steethareyellownomatterwhatIdo–Whatisgoingon?Thisisoneofthemostcommonquestionswegetabout2nd,3rdand4thgradechildren.Whileplentyofkidswhoneedmorehelpbrushing,themostcommonreasonforyellowteethistheinherentdifferencesbetweenpermanentteethandbabyteethaswellasyoungvsolderpermanentteeth.Herearesomeexamples:YoungpermanentteethhavereallyREALLYbigne...[阅读全文]
