All-in-one self-etch model adhesives: HEMA-free and without phase separation

Masae Furukawa, Yoshimi Shigetani, Werner J. Finger, Marcus Hoffmann, Masafumi Kanehira, Tatsuo Endo, Masashi Komatsu

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


Objective: Aim of this study was to design HEMA-free all-in-one self-etch model adhesives without phase separation, and to investigate their efficiency on extracted human teeth. Materials and methods: Compositions of adhesives in mass% (1): UDMA (25), 4-META (20), H2O (0, 1, 2, 5, 10, 20, 35, and 45), balance of acetone or ethanol. (2): UDMA (35), 4-META or 4-MET (28), H2O (0, 2, 4, 5, 6, and 8), balance of acetone. Phase separation was evaluated on samples exposed to ambient atmosphere. Conventional shear bond strengths (SBS, n = 8) were determined on human enamel and dentin. Marginal adaptation (MGW, n = 8) was assessed in cylindrical butt-joint dentin cavities. Results: Solutions (1) and (2) with 5 and 8% or less water content, respectively, showed no phase separation. SBSs on enamel were not different within the acetone- or ethanol-group and between the adhesive groups (1). Water content of adhesives (2) was a significant determinant of enamel SBSs, groups with 4-META or 4-MET were not different (p > 0.05). Dentin SBSs with adhesives (1) were not different (p > 0.05) within solvent groups, yet higher for acetone-dissolved adhesives (p < 0.05). Dentin SBSs with adhesives (2) were different by water content and functional monomer (p < 0.05). MGW for solutions (1) were smaller with acetone-dissolved than with ethanol-dissolved adhesives (p < 0.001). Acetone solutions between 2 and 45% water content produced almost perfect marginal adaptation. Marginal adaptation of adhesives (2) was almost perfect at 5 through 8% water content. Conclusions: Simplified HEMA-free self-etch adhesives without phase separation were prepared without compromises on bonding efficiency to enamel and dentin.

Original languageEnglish
Pages (from-to)402-408
Number of pages7
JournalJournal of Dentistry
Issue number6
Publication statusPublished - 2008 Jun 1


  • Bond strength
  • Enamel-dentin bonding
  • Marginal adaptation
  • Phase separation
  • Self-etch adhesives

ASJC Scopus subject areas

  • Dentistry(all)


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