Bonding durability of dental sealants to deciduous and permanent teeth

Abstract

Aim: To evaluate the bonding durability of materials used as sealants on different dentitions. Methods: Deciduous (D) and permanent (P) molars were divided into four groups (n=5) and sealed with Fluroshield (F) and OptiBond FL (FL). Blocks of composite resin were built, stored in distilled water (24 h/37 °C), sectioned into 0.8 mm 2 and tested at tensile (0.5 mm/min) after 24 h and 6 months. The fractures were observed and classified into adhesive, cohesive or mixed types. The data were analyzed using repeated measures ANOVA and Tukey test (α=5%), with tooth as the experimental unit. Results: There were differences for dentition (p=0.0097), dental sealant (p=0.0019) and time (p=0.0001). At 24h the highest bond strength was observed for OptiBond FL on deciduous and permanent teeth, similar to Fluroshield at both dentitions. After 6 months the bond strength of OptiBond FL did not decrease in the permanent teeth, but decreased similar to Fluroshield in deciduous teeth, the bond strength of Fluroshield decreased similarly in both dentitions. Conclusions: The bond strength of dental sealants varied with the experimental conditions.

Clinpro ™ XT Sealant Adhesion to the Occlusal Surface of Primary Molars: Longitudinal Evaluation

“…The results showed greater adherence of the OptiBond FL at 24h, compared to Fluroshield, Clinpro TM XT and Vitremer TM , which showed a similar adhesion. This result is consistent with other studies 11,15,33,34 and can be explained by the lower viscosity of the adhesive system, as compared to other materials. OptiBond FL fulfills adequately the micro porosities of enamel produced by acid conditioning 15 , forming extensions of the material (tags) 37 that favored the adhesion.…”

“…While in the clinical the contamination of surface that will receive the sealant material by saliva or gingival fluid were pointed out as the main reason of failures 12 , particularities of the material used as a sealant may explain the lower adherence of some of them over time, as in the present study, which showed lower adherence of optibond FL, Fluroshield and Vitremer TM after 6 months. Moura et al 33 , in a study of longevity of adhesion of materials used as sealants, also observed a reduction in the values of the deciduous teeth sealed with optibond FL And Fluoroshield, after 6 months, suggesting that the methodology used could weaken the adhesion between the material and the dental friable enamel. In laboratory study comparing the adhesion of resinous and ionomer materials used as sealants, Papacchini et al 40 also observed higher adhesion when used resinous base materials in enamel treated with phosphoric acid, compared with glass ionomer cements after treatment with primers indicated by the manufacturers.…”

“…The dental crowns were then subjected to prophylaxis with suspension of pumice and water with brush of Robinson at low rotation speed, and sealants were applied on the occlusal surface of the teeth, in accordance with the indication by each manufacturer, as described in Table 1. After the application of sealants and photo activation, rectangular blocks of composite resin Filtek Z250 were built incrementally (3 x 2 mm) on the occlusal surface 15,33,34 . The specimens were stored in ultrapure water for 24 hours at 37 o C, and after this period cuts were made with diamond disc (Extec 12205 High Concentration; Enfield, CT, USA) in the mesiodistal direction, in cutting machine of high precision (Isomet buehler Ltd, 1000; Lake Bluff, IL, USA).…”

“…Irinoda et al 38 have demonstrated, by means of microscopy, that sealants with lower viscosity penetrate with greater effectiveness in the conditioned enamel, enamel/resin interface would be disposed perpendicularly to the application of load 36 . The traction test was performed at a speed of 0.5 mm/min, with the load cell of 50 N 33 . The calculation of the bond strength was performed in Mega Pascal, by dividing the value of breaking load (in Newtons (N) in the area of cross-section 36 (in mm 2 ).…”

Resin-based sealants longevity: a clinical evaluation

“…Sealants of pit and fissures are known as an effective method for the prevention of caries due to their properties that favor the prevention of this disease, since they act in the release of fluoride, also acting as a physical barrier between the tooth and the external environment and biocompatibility 20 . Therefore, longitudinal clinical studies should be encouraged to evaluate the efficacy of these methods 21 .…”