We had a patient that was missing #22. The space was too large for one huge cuspid as it would have cosmetically unattractive. There is currently no way in Dentrix to chart/treatment plan it as #22A and #22B. He doesn't have insurance so that is a non issue, but it would be helpful to list it in his treatment plan.
Thank you for the recommendation, we are always looking for ways to improve the product. we will consider this for a potential future release.