hi, first u have to know, we can do  composite filling for front teeth gap but it should be certain m.m gap ,if it is beyond level better go for other treatment like orthodontic or ceramic cap .         maintenance like should not give more pressure on filling area, don't take stain creating material like coca cola, don't do traction moment, do properly brush with brushing technic yes ,you can remove filling in future then you can go alternative treatment.-thank you.                     

Composite fillings are one of the best materials available in dentistry for anterior tooth fillings and for gap closures like how u had underwent. However with time these materials might take up the food stains such a coffee etc and may change in colour.  In such case refillings need to be done. However in your case for gap closure, you will be able to remove them when you want though a permanent solution of orthodontic gap closure or Veneers may be better since you need not undergo repeated fillings.