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CC BY-NC-ND 4.0 · Eur J Dent 2012; 06(04): 402-407
DOI: 10.1055/s-0039-1698979
Original Article
Dental Investigation Society

Can extended photoactivation time of resin-based fissure sealer materials improve ultimate tensile strength and decrease water sorption/solubility?

Boniek Castillo Dutra Borges
a   Potiguar University (Laureate International Universities)
,
Eduardo José Souza-Júnior
b   State University of Campinas
,
Anderson Catelan
b   State University of Campinas
,
Luís Alexandre Maffei Sartini Paulillo
b   State University of Campinas
,
Flávio Henrique Baggio Aguiar
b   State University of Campinas
› Institutsangaben
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Publikationsverlauf

Publikationsdatum:
30. September 2019 (online)

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ABSTRACT

Objective: This study aimed to evaluate the impact of extended photoactivation time on ultimate tensile strength (UTS), water sorption (WS) and solubility (WSB) of resin-based materials used as fissure-sealants

Methods: A fissure-sealant (Fluroshield) and a flowable composite (Permaflo) polymerized for 20 and 60 seconds were tested. For UTS, 20 hourglass shaped samples were prepared representing two materials and two photoactivation time (n=5). After 24-h dry-storage, samples were tested in tension using a universal testing machine at a cross-head speed of 0.5 mm/min (UTS was calculated in MPa). For WS and WSB, 20 disks with 5 mm diameter and 1 mm height (n=5) were prepared and volumes were calculated (mm3). They were transferred to desiccators until a constant mass was obtained (m1) and were subsequently immersed in distilled water until no alteration in mass was detected (m2). Samples were reconditioned to constant mass in desiccators (m3). WS and WSB were determined using the equations m2-m3/V and m1-m3/V, respectively. Data were subjected to twoway ANOVA and Tukey’s HSD test (P<.05).

Results: There was no significant difference between materials or photoactivation times for the UTS and WS. Permaflo presented lower but negative WSB compared to Fluroshield.

Conclusions: Extended photoactivation time did not improve the physical properties tested. Fluroshield presented physical properties that were similar to or better than Permaflo. (Eur J Dent 2012;6:402-407)

Key words

Fissure sealant - photoactivation time - ultimate tensile strength - water sorption - water solubility
 

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