Do i really need 3 fillings!

[mali]

hello there, i would like some advice as to whether the pictures i have uploaded of my teeth indicate that i require fillings for all of these. there is one with medium-large sized cavity, another with a large dark shadowing on the back of my front incisor (that i have had for the best part 8 years, although now im told it needs to be filled despite appearing the same as it always was), another with a smaller cavity and two x-rays. i am told there is a slight darkening on one of my teeth in one of the x-rays in comparison to the healthy teeth it is surrounded by and this indicates a possible need for a filling. that specific darkening is in reference to the smaller cavity.

any information on this would be appreciated as my dentist of over 10 years has moved away to Australia and i'd like to be in the know as best as possible before committing my oral health to another.

thank you for your time

 

[mali]

also would someone beable to enlighten me as to whether a white filling is in fact stronger than a silver amalgam one please? and whether any of these potential fillings are reversible? thank you