In doing research on the procedure my dentist has in one of my family member's treatment plan, I stumbled across your posting. Since my expertise is in data (governance, taxonomy, mapping, etc), perhaps my perspective could help.
From the original post it sounds that the "codes" being used are the D4261 & D4260, with the differentiation being the number of teeth worked upon (i.e. 3 or less vs. 4 or more).
Ignoring all the other minutia for a moment, the CPT code I found that was / is the closest match would be CPT code 41823, which I found on a data mapping table from the following URL >>
https://www.medicaid.gov...cpt-to-cdt-crosswalk.pdfWhether this is applicable, I have not a whit, as each circumstance is unique. If my observation isn't helpful, please ignore.