This appears to be an update to their original disclosure to note that they are aware of "four state court lawsuits related to the August 2026 data breach".
Park Dental Partners, Inc. (0002069604) (Filer) (cik: 0002069604) filed an 8-K update with an Item 1.05. See the filing at https://www.sec.gov/Archives/edgar/data/2069604/000110465926115541/0001104659-26-115541-index.htm