Abstract
Background and Objectives: Dental anxiety is a common barrier to pediatric oral care. Non-pharmacological relaxation techniques like Jacobson's Progressive Muscle Relaxation (JPMR) and Breathing Control (BC) may help reduce psychological and physiological stress. This study assessed the utility of JPMR and BC in reducing dental anxiety and physiological arousal in children and adolescents. Materials and Methods: In this observational study, 189 participants aged 8-17 undergoing non-invasive dental procedures were assigned to JPMR (n = 63), BC (n = 63), or control (n = 63) groups. Dental anxiety was measured with the Romanian-validated IDAF-4C(+), and physiological stress was measured via blood pressure and heart rate. Pre and post-intervention data were analyzed using paired t-tests, ANOVA, and cluster analysis. Results: JPMR led to the highest reductions in IDAF-4C(+) scores (Δ = -1.23, p < 0.001, d = 1.12) and systolic blood pressure (Δ = -9.4 mmHg, p < 0.01). BC showed moderate anxiety reduction (Δ = -0.64, p < 0.05, d = 0.61) with minor physiological changes. The control group showed no significant change. Cluster analysis revealed three response patterns: (1) high anxiety-strong responders (n = 58), mainly benefiting from JPMR; (2) moderate anxiety-partial responders (n = 74); and (3) low anxiety-non-responders (n = 57). Younger age and female gender were linked to better JPMR response. Conclusions: JPMR is an effective and practical method for reducing dental anxiety and physiological stress in pediatric dental care.