Abstract: Objective: To construct a periodontal tissue health intervention program for adult orthodontic patients with periodontitis, providing a reference for clinical practice. Methods: Based on the Health Action Process Approach, a periodontal tissue health intervention program for adult orthodontic patients with periodontitis was constructed by literature review, group discussion, and expert consultation from February to March in 2024. The Delphi method was used to consult 15 experts, and the relevant items were revised based on the experts' opinions to form the final program. Results: The authority coefficient of two rounds of expert consultation was 0.829. The positive coefficient was 100%, the coefficient of variation was 0.091-0.532 and 0.044-0.196, and the Kendall harmony coefficients were 0.246 and 0.293 (P<0.01). The final intervention program included three stages of pre-intention stage, intention stage, and action stage, and a total of 17 specific intervention measures. Conclusion: The intervention program constructed in this study is scientific, reliable and practical. It has the characteristics of stomatological nursing and is easy to be promoted in clinical practice, which can provide references for the clinical practice of stomatological health education.

Key words: orthodontics; tissue health; program construction; visual plaque detection; Health Action Process Approach; Delphi technique