COMPARATIVE TRIAL OF ADHESION TO ENAMEL BETWEEN TRADITIONAL AND SELF-ETCHING SEALANT

Introduction: Sealing grooves and fissures, has been repeatedly shown to bean effective tool to prevent the development of carious processin pediatric patient. The purpose of this study was the comparison between two different types of sealant , by evaluating strength of adhesion to enamel and calculating the unit breaking load of pins of sealant; with the aid of a machine for universal test materials. Materials and methods: 40 included third molars (Caries-Free), mounted on copper rings (∅10x10) by Vertex resin, exposing only lingual-palatal surface. Divided into two groups of 20 units by sealing technique: traditional technique(group test), was used sealant A; for the second(group control) was used, Self-Etch technique with sealant B . Student'st test to compared the groups. The exposed surfaces of the teeth were milled with a diamond bur using a paralleling, subtracting 0.3 mm of enamel and making them flat. We performed the sealing, with empty plastic cylinders (∅0.275 mm). Before implementing any measures, the specimens were stored for 30 days in moist (100%). Measured the ∅ of the pins of sealant with the aid of a digital centesimal caliper, the specimens were mounted on supports to be placed in the universal machine. It exploits a metal tip which, in contact of the pin, applies an increasing load, to the severance of the same; obtaining as a result the ratio of applied force (F) and surface (S): F = F / N = N/mm2 = Mpa. Result:Group Test (Mean=21.06,SD=3.19,Max=26.7,Min=15.4),Group control: (Mean=10.43,SD=3.44,Max=16.3,Min=3.5). Statistically significant differences emerged between two groups.(p-value<0.05).Group A is statistically superior. Discussion: In our study, comparing two techniques: traditional and one-step,the results were interesting both for process and quality of success. One-steptechnique, recently discovered and still low used, presents physico-mechanical properties similar to the traditional, while reducing time, very positive factor in pediatric dentistry. Conclusion: We considered that traditional technique ensures more reliable results.