Kalluri Y, Chakravarthy Y, Reddy DBS, Nimmala SRN, Pabbineedi SSS, Gathram P. Corroborating of Depression, Anxiety, and Stress Scale-21 items (DASS-21) and the Perceived Stress Scale-10 items (PSS-10) and Psychological Features in patients with periodontitis: a questionnaire study. Int J Dent Mater. 2024;6(3):58-63. doi:10.37983/IJDM.2024.6302