question: Dear doctor, am the sixth child for my parents..my 3rd sister and myself has yellow teeth..yellow teeth means not slightly yellow..thick dark yellow..when i asked to my parents they told when the teeth started to grow as an infant itself started to grow as yellow for my sister and for me it was in white in color only but well the milk teeth fell and permanent teeth started to grow at that time it started to grow as yellow (pure yellow in color) now am 36 years of age..when i asked doctors some of them told it was calcium deficiency..now already it is too late..is there any way to rectify doctor