Hybrid layers of etch-and-rinse versus self-etching adhesive systems

  1. Alberto Albaladejo Martínez 1
  2. R. Osorio Ruiz 2
  3. Manuel Toledano Pérez 2
  4. Marco Ferrari 3
  1. 1 Universidad de Salamanca
    info

    Universidad de Salamanca

    Salamanca, España

    ROR https://ror.org/02f40zc51

  2. 2 Universidad de Granada
    info

    Universidad de Granada

    Granada, España

    ROR https://ror.org/04njjy449

  3. 3 Università degli Studi di Siena
    info

    Università degli Studi di Siena

    Siena, Italia

    ROR https://ror.org/01tevnk56

Revista:
Medicina oral, patología oral y cirugía bucal. Ed. inglesa

ISSN: 1698-6946

Año de publicación: 2010

Volumen: 15

Número: 1

Páginas: 24

Tipo: Artículo

DOI: 10.4317/MEDORAL.15.E112 DIALNET GOOGLE SCHOLAR lock_openAcceso abierto editor

Otras publicaciones en: Medicina oral, patología oral y cirugía bucal. Ed. inglesa

Objetivos de desarrollo sostenible

Resumen

Objective: To evaluate the effectiveness in the formation of resin tags, adhesive lateral branches and hybrid layers of five adhesive systems, when bonding to dentine. Material and Methods: Flat dentin surfaces from 25 molars were bonded with several adhesive systems according to the manufacturers’ instructions. Composite build-ups were constructed incrementally with Tetric Ceram. The Specimens were sectioned parallel to the long axis. One section was treated with phosphoric acid and sodium hypochlorite in order to reveal the hybrid layer formation. The other section was stored in 30% hydrochloric acid to detect resin tags and adhesive lateral branch formation. Results: The two etch-and-rinse self-priming adhesives exhibited thicker hybrid layers than those found in self-etching adhesive systems. The all-in-one adhesive showed droplet formation between the adhesive and the resin composite. The resin tags formed with the etch-and-rinse adhesives were much longer than those found with the self-etching adhesives. Lateral branch formation was observed in etch-and-rinse adhesives and in one of the self-etch adhesives Clearfil SE Bond (SEB). Conclusion: The formed hybrid layer obtained with the two-step selfetching adhesives and the etch-and-rinse systems were continuous and uniform in thickness. Droplets within the all-in-one adhesive layer may occur as a result of water absorption from dentin through osmosis, and may interfere with proper resin polymerization. Resin tags obtained with SEB and the etch-and-rinse adhesive systems showed lateral branches, which is a sign of proper resin infiltration.