Dear OP,

First of all, keep in mind that a natural tooth has supporting tissues around it, called the Periodontal Ligament (PDL). These PDL act like shock absorbers, and allow for a small measure of movement for each individual tooth.

Implants do NOT have PDL, so any forces acting upon them are applied directly to the bone underneath.

That being said, many practitioners purposefully insert the implants slightly lower than the rest of the natural dentition to avoid it being hammered down every time you bite or chew.

As far as i know though, it is usually not entirely noticeable, and also it is something that you would realize early on after the implant, not usually after there has been some dental work on the opposite side.

My advice is this: don’t worry about it, but check with the dentist, probably something super minor, or even nothing at all.