Abstract
ObjectivesThis in vitro study evaluated the shear bond strength (SBS) and microleakage of three experimental self-etching primers for pit and fissure sealing.Materials and methodsThe material used three formulations of an experimental fissure primer (EFP) applied without phosphoric acid etching (EFP-1/EFP-2/EFP-3) and one control group with sealant application after 30 s of acid etching. Four groups of sealants (n = 40 specimens/group) were tested for SBS, and a failure analysis was conducted after 1-day water storage, 3-month water storage, and 5000-fold thermocycling. In addition, microleakage was tested.ResultsThe SBSs of the EFPs (range 8.2 MPa (standard deviation 4.2) to 15.4 MPa (5.4)) were generally significantly lower than those of conventional fissure sealing (range 15.6 MPa (4.4) to 19.1 MPa (6.2)). The SBS of EFP-3 was better than that of the EFP-1 or EFP-2 formulations. Microleakage was significantly lower in the control group (1.1 %) than in the EFP-1 (3.8 %) and lower than in EFP-3 (7.7 %) group. In the (multiple) linear regression analysis, material and aging significantly influenced SBS.ConclusionsThe SBS of EFP-3 was 15 to 32 % lower than it was for the corresponding controls.Clinical relevanceThe SBS is lower, but the main potential benefit of this new approach is a reduced application time in clinical practice.
Highlights
Pits and fissures are the most susceptible sites to caries in permanent teeth [1,2,3]
This study showed that experimental fissure primer (EFP) were associated with lower shear bond strength (SBS) (Table 2) and microleakage (Table 5) when compared to the controls, which used a conventional fissure sealing
According to the SBS data, the EFP-3 group showed the highest values under in vitro conditions compared with the groups that were tested earlier
Summary
Pits and fissures are the most susceptible sites to caries in permanent teeth [1,2,3]. Pit and fissure sealants are frequently used to prevent caries development or to arrest existing caries lesions [4]. The effectiveness of sealants is obvious in patients at risk for caries [5], and this preventive measure protects pits and fissures as long as the sealant is fully retained on cariessusceptible sites [6]. Taking into account all treatment steps for self-etching primers and conventional sealants, the pretreatment time is reduced by up to 50 %. This might allow for a less technique-sensitive and more patient-friendly clinical workflow, which is attractive in pediatric dentistry. The conventional clinical workflow employs a phosphoric acid etching step to create micromechanical retention, the new sealants use a selfetching primer to establish adhesion between the enamel and
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
