Please tell me if there are any other safe tooth fillings besides white composite and silver amalgam?

Of course. Today, several dental filling materials are available. Teeth can be filled with gold; porcelain; composite and silver amalgam. The dentist will inform every patient of the available choices of dental fillings and explain advantages and disadvantages.
Cast restorations. There are restorations that can be fabricated by a dental laboratory in lieu of traditional fillings. They are made from gold or porcelain, and are also safe. Speak to your dentist about your options.