Curing depth of pit and fissure sealants with use of light emitting diode (LED) at different distances

Azucena Villarreal Rojas, Jorge Guerrero Ibarra, Adolfo Yamamoto Nagano, Federico Humberto Barceló Santana


In the process of caries prevention, placement of pit and fi ssuresealants is a low-priced, effective and safe procedure. Presently,clinical operators prefer LED lamps. In pediatric dentistry, certaincomplications might arise such as lack of patient cooperation andsmall oral opening. This could result in increase of distance betweenlight source and sealant. Objective: The purpose of the presentstudy was to determine whether increase of distance between lightsource and pit and fi ssure sealant affected curing depth. Materialand methods: 90 samples of pit and fi ssure sealant Helioseal F®were light-cured for 20 seconds with a Bluephase C5 LED lamp(Ivoclar Vivadent®), 30 seconds with the light source at a distanceof 0 mm, 30 seconds at 5 mm and 30 seconds at 10 mm. Nonpolymerizedmaterial was removed with a spatula for resin (SuterDental®). The sample was measured in mm with an electronicVernier caliper; obtained value was divided into two (ADA’s Norm27). Results were assessed with ANOVA and Tukey tests. Results:The group treated at 0 mm exhibited curing depth of 2.01 mm (SD0.11). The group treated at 10 mm, with 1.62 mm (SD 0.08) showedthe least amount of curing depth. Statistically significant differenceswere found in average values when comparing the three groups (p< 0.05). Conclusion: Distancing light source from sealants affectstheir curing depth.

Palabras clave

Curing depth, pits and fi ssure sealants, LED

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