Study regarding the assessment of microleakage in first class composite resins restorations

Authors: Dana Apostolide, Dumitru Dorel Pomohaci, Radu Titus Marius, Oana Tănculescu


Fissure caries are still an enigma as concerns diagnosis and therapeutic options. The preparation of the cavity surfaces for the composite resin restoration is achieved with the help of various air abrasion devices or with polishing devices that make use of sodium bicarbonate powder (Prophyjet). The objective of the study consisted in the assessment of the marginal sealing of occlusal restorations via a colorimetric method in various clinical situations, by using the above mentioned devices and by applying either only the self-etching abrasive system or the latter, with additional acid etching. Material and method. 40 molars with an intact occlusal surface, extracted for various reasons, were selected, and standardized cavities were prepared. They were divided into 4 study groups depending on the preparation technique of the surface, and each group was subsequently divided depending on the marginal acid etching. The technique used for the assessment of the percolation was colorimetric, and the results were statistically evaluated with the help of the χ2 contingency tables. Results. The weakest adhesion was obtained by group A, subgroup A2 with the highest number of teeth (4) with the highest percolation value (3), and the best adhesion was obtained by group D, subgroup D1, with the highest number of teeth (5) with the smallest value (0). The statistical interpretation shows that the absence of etching causes the largest marginal spaces (p = 0.0036), and groups B1 and D1 (p = 0.032) registered the most significant statistical correlation. Conclusions. The obtained results showed that marginal sealing considerably improved through the use of one of the 2 systems, to which the acid etching of the margins was added.

  • bioadhesive materials
  • fissure caries
  • microleakage