I had read a thread on Beauty Heaven some months ago on how to repair torn nails. It's something that I've tried before without much success. That was, up until yesterday when I repaired a nail that was torn over half way across.
I have recently had small tears on the sides of 2 nails, and had used nail glue on both of them. The glue would set in the narrow gap of the tear and I'd file the roughness off the top, but the glue wouldn't hold and I redid them over and over for a couple of weeks. The nails each ended up with a groove across the top of the tear and the glue wouldn't dry there. It only seems to dry in between things. The glue also wouldn't go to the very edge of the nail, meaning that there was always a bit sticking out to snag on things. Yesterday afternoon, one of those nails snagged and tore.
After thinking about the suggestions in the Beauty Heaven thread, I applied glue in the tear and over the top of the groove, then put a piece of tissue across the top of the glue and pushed it in with an orange stick. The glue saturated the tissue and then dried and hardened. Yay. :)
I trimmed and buffed the edges of the paper away, then repeated with another piece of paper that I had cut to follow the edge of the nail. With a little bit of experimentation, I've managed to repair the nails right to the edge, so that there is nothing to snag, and filled in the grooves.
Hopefully I'll have some time to shape and paint my nails soon, and I'll see if the repairs are visible. I'll have to wait and see if they tear through the repairs.
In the above photo, the row of pale spots across the nail are the visible remains of the tear after it had been glued and filed. The edge of the nail at the bottom of the photo has been filed a bit too much from trying to remove the snagging edge of the nail before I tried using the tissue.