The gums have not shrunk, and even now they have not appeared. In addition, the all-ceramic teeth you made have little irritation to the gums. To say the least, even if there is atrophy, as long as the stimulation is removed, it will not shrink forever.

In this case, you can basically rule out the gum factor, mainly from several aspects.

1 mild periapical periodontitis: The reason why it is mild is because the symptoms you are describing are relatively weak.

This may happen if the tooth has been broken before and the pulp has been treated. You didn't describe it, so the chances are slim.

2 pulpitis: due to the stimulation of materials, long-term chronic weak material stimulation may lead to a large number of teeth with sensitive pulp being polished, and short-term main symptoms focus on the sensitivity to external stimuli, such as cold and heat. Gingival symptoms are not obvious.

Gingival inflammation: mild, caused by material stimulation or low position and oppression of porcelain subgingival.

It's not a big problem, but it's easy to check if you want to be sure, mainly to reassure you.