CARMEN BIRIS, EDWIN SEVER BECHIR, ALIN ODOR, ANAMARIA BECHIR, ILINCA SUCIU, GABRIELA CIAVOI, VALENTIN PRIBAC, FARAH BECHIR COMPARATIVE DESENSITIZATION EFFECT OF VITAL ABUTMENTS REALIZED BY DIFFERENT METHODS Vital abutments presents different degree of dentinal sensitivity (DS) after their preparation. Protective methods of dentinal wound have the purpose to fill up the dentinal tubules. The objective of the study was to assess the efficacy of three different desensitization methods applied to reduce the postoperative sensitivity of prepared vital abutments. The clinical trial included 65 patients with 251 vital abutments, divided into three groups: in the first group of 21 patients (82 vital abutments) the protection method was carried out by a desensitizer agent containing hydroxyethyl methacrylate and glutaraldehyde; in the second group of 22 patients (85 vital abutments), diode laser therapy was used; in the third group of 22 patients (84 vital abutments), associated protection method was applied, by using the same desensitizer agent and laser therapy. During the study, all selected patients used the same toothpaste for at-home desensitization, containing 5% calcium sodium phosphosilicate (CSPS). The evaluation of the painful intensity of DS in vital abutments after desensitization was realized by using a Visual Analogue Scales (VAS) and by evaluating the failure rate. The results of study showed that after desensitisation, the DS of vital abutments has decreased in all three groups, but the highest desensitization rate with the most reduced rate of failures was found in the third group of patients, with associated therapies. The efficiency of the applied desensitization methods have been confirmed.