成人牙齿松动，过早脱落的根本原因在于（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25605' and id < 2154589 and id<>'2154589' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25605' and id > 2154589 and id<>'2154589' order by id asc limit 5