Hybrid Layer Measurement after Using One-Step and Two-Step Self-Etching Cements
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Background: Hybrid layer formation should be proportional to cement properties to successfully retain fiberglass posts into root canals. Purpose: To measure of hybrid layer thickness in coronal and apical thirds after using one-step and two-step self-etching cements. Methods: This experimental study used 30 human premolars with root-canal treatments, which were assigned into three groups. Fiberglass posts were cemented with three types of self-etching cements following manufacturers’ instructions. Roots were cut in the coronal and apical thirds and hybrid layer thickness was quantified through scanning electron microscopy. Data were analyzed with Kruskal-Wallis and Mann-Whitney tests (p < 0.05). Results: Average thickness of the hybrid layer was 0.74 μm with Multilink N™ (group 1), 0.24 μm with RelyX Ultimate™ (group 2), and 0.03 μm with RelyX U200™ (group 3) (p = 0.0092). Average thickness in coronal and apical thirds were: 1.29 μm and 0.19 μm for group 1; 0.33 μm and 0.14 μm for group 2; and 0.26 μm and 0.23 μm for group 3, differences that were statistically significant (p = 0.043). Conclusions: The thickness of the hybrid layer formed after suing two-step cements was greater than that of one-step cement, especially in the tooth coronal third.
fiber-glass post, hybrid layer, interface, one-step self-etching cement, self-etching cement, two-step self-etching cement, biomaterials, dental materials, dentistry, oral rehabilitation, prosthodonticscapa híbrida, cemento autograbador, cemento autograbador de dos pasos, cemento autograbador de un paso, interfase, poste de fibra de vidrio, biomateriales, odontología, materiales dentales, prostodoncia, rehabilitación oralPost de fibra de vidro, camada híbrida, interface, cimento autocondicionante de passo único, cimento autocondicionante, cimento autocondicionante de duas etapas, biomateriais, materiais dentários, odontologia, reabilitação oral, prótese dentária
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