Dental anxiety causes patients to refuse or delay treatment, which may exacerbate oral diseases. The aim of the current randomized controlled trial was to determine whether progressive muscle relaxation therapy could relieve dental anxiety. The trial included 68 periodontal patients with dental anxiety scores of ≥13 who were randomly assigned to either an intervention group or a control group (n = 34 per group). The intervention group was administered progressive muscle relaxation therapy for 20 min and oral health education for 15 min before periodontal treatment once per week for 4 wk. The control group was provided with oral health education only, for the same duration. Changes in dental anxiety, depression symptoms, blood pressure, heart rate, and salivary cortisol were evaluated 4 wk and 3 months after the intervention. The intervention group exhibited statistically significantly greater reductions in dental anxiety scores than did the control group at the 4‐wk (−3.82 vs. −0.89) and 3‐month (−4.22 vs. −0.28) assessments. They also exhibited significantly greater reductions in depression symptoms, systolic and diastolic blood pressure, pulse rate, and salivary cortisol levels at both time‐points. Progressive muscle relaxation therapy relieves tension and anxiety in dental patients.
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