Background and objectives: Patients anxiety is one of the main problems that we have to lead with in dental practice. 10% of patients experiment such anxiety level that make them avoid any dental treatment. During dento alveolar surgery patients experiment not only emotional response but also a physiological one. Musical therapy has been used in many medical specialties for achieve patient relaxation and decrease of anxiety. The aim of this work is to study the effect of receptive musical intervention on patient anxiety and possible positive action over satisfaction degree and comfort.

Methods: We desing multi center controlled clinical study. 45 selected patients divided in 3 groups: A,B,C. Group A musical intevention, group B protective earphones and group C control group. We registered vital signs, arterial blood pressure and cardiac frequency at 6 different stages: (1) presurgical, (2) anestesic procedure, (3) osteotomy, (4) odonto section, (5) luxation, (6) postoperatively. Anxiety was measured with the Modified Dental Anxiety Scale (MDAS). This mesure was performed pre and postsurgery. Satisfaction degree was evaluated with a survey scored 1 to 5, where 1 means very unsatisfied and 5 was very satisfied. This survey was performed postsurgery. Results were analized by Anova or Kruskal-Wallis tests.

Results: Anxiety levels where statistical significant inferior at A group with p = 0.004. Blood presure: systolic was statistical significant less at group A at any surgical stage p = 0.000. Diastolic was statistical significant less at group A in any surgical stage exept at stage 6. Cardiac frecuency was statistical significant less at group A p = 0.000. Satisfaction degree was statistically significant better at A group mean value of 4.69 in 1 to 5 range scale, p = 0.000.

Conclusion: Reseptive musical intervention has possitive effect over patients anxiety level and satisfaction degree.

Key words: music; anxiety; third molar