RESUMEN
Objective: To compare the use of two different restorative materials placed in deciduous teeth. Material and Methods: Clinical observations were formed in the number of 58 patients aged 3 to 12 years; 23 - with deciduous dentition, 35 with mixed dentition. The total number of teeth was 266. The Index of destruction of the occlusal surface of the teeth (IROPZ) and the following materials were used: Ionofil Molar® (VOCO) and Twinky Star® (VOCO). Microphotographs of the sections selected for illustration were performed using a Biorex-3 VM-500T microscope with a digital DCM- 900 attached photo element using for interpretation of the results adapted data research software. The Spearman correlation coefficient [r] was used to examine the relationship between the parameters evaluated. The level of significance was set at 5%. Results: The Twinky Star® compomer has been found to be optimal for restoring the teeth with an IROPZ of less than 0.55, pH levels of <6.2 and any values of the degree of acidity of the enamel [r = 0.89]. Ionofil Molar® showed to be a material of choice with high and average degrees of acidity of the enamel [r = 0.65]. Conclusion: Choice and usage of different types of restorative materials depend on the period of bite, the condition of root formation, group membership of the teeth, depth and topography of the carious, the level of the pH of the saliva, the degree of acid resistance enamels and areas of destruction of the occlusive surface of the tooth.