Is it normal for gums to be sore and tender after placement of crown over implant?

It is not uncommon for your gums to be sore immediately after having a crown placed over an implant.  Even if there was no pain before the permanent crown was placed, the gum tissues need to adapt to the shape of the new crown and sometimes, this can cause discomfort for a day or two.  Remember before your crown was placed, either you had a temporary or a healing abutment over the implant.  Very rarely are the dimensions of your temp or healing abutment the same as your permanent crown.  As a result, sometimes your gum tissues have to be cut either surgically or with a laser to make your new crown fit.  This can cause discomfort also.  You should follow up with an appointment to your dentist after notifying the office of your discomfort and concerns.  I hope this help and please keep us informed.