to lose a toenail adds questions to the actual problem--Most of the time a person will lose the big toe nail because the boot is too big (wrong size , ie too long). I have seen people with wide feet (EEE) that have bought a size more than they need too accomadate thier width , but what happens is the foot starts to slide and bangs the front of the boot and soon you have BLACK toenail. The inotec 9 is a good boot but do you have the HVL version? Also even though Tecnica has higher volumn boots in this model it is high volumn over all, from heel to toe . If you have what I call a slice of pizza shaped foot , you need a boot that has potential for a wide toe box. Nordica and solomon have bigger toe boxes(depends on the model), I have found that the evolution 2-9 can be blown out up front better than the tecnica , because it is more of a square toe versus a round toe. Do a shell fit on your tecnicas , to ck if they are the right length and that was the cause of toenail lose.