My four front teeth (2 on top, 2 on bottom) are transparent on the edge. would a pronamel toothpaste be enough to get ridof that? what is the recommended treatment?

Transparency: The transparency that you are referring to is quite normal. At the very edge there is no dentin, just enamel and since the enamel is very transparent, it looks dark. The toothpaste mentioned is good and will help keep your teeth strong, but probably will not help with the transparency.

Transluscent teeth: No tooth paste can ever do that.! the incisal edge transluscency is a normal occurrence and does not need any treatment, as long as there is no sensitivity, nor surface anomaly. Good luck.

No: Toothpaste won't alter translucency. If your incisal edges are translucent to the point of transparency they have probably worn thin. Porcelain veneers will help your teeth look great and also add strength.

No: Incisal transparency\translucency is normal and varies from individual to individual and from tooth to tooth. Wearing down of these edges or tooth erosion may sometimes increase the transparency. I recommend that you discuss this issue with your own dentist to see what, if anything, can be done to satisfy your wishes.