My invisalign orthodontist only saw me once at the initial appointment. After that, all my invisalign procedures (e.g. scanning, imaging, moulding, putting on attachments, giving instructions, etc.) were done by his nurses. The orthodontist was at the office but was always seeing other patients. Sometimes I have no idea what his nurses are doing and if they were doing a good job. My orthodontist didn't even come by to check on me! Is this is a common practice in an invisalign dental office?