Influence of the Restorative Strategy on Push-out Bond Strength of the Self-adhesive Composite.

AIM: This study evaluated the influence of the resin composite and bonding strategy on the push-out bond strength of the self-adhesive, Fusio liquid dentin (FUS) (Pentron Clinical), and of two conventional resin composites of different viscosities, Filtek Z250 (3M ESPE) and tetric flow (Ivoclar Vivadent). MATERIALS AND METHODS: Thirty-two bovine incisors were used after disinfection. The roots were sectioned and the buccal and lingual surfaces were polished until a 2-mm slab was achieved, maintaining enamel at the buccal surface and dentin at the lingual surface. Standardized cavities were then prepared (2.0 × 1.5 mm) and restored according to the following bonding strategies: Fusio liquid dentin with selective etching (FUSSE) in enamel, FUS, Filtek Z250, and tetric flow-total etching (TET). All groups were restored in bulk. After 24 hours of storage in distilled water, finishing and polishing were performed. The push-out test was conducted on a universal testing machine (0.05 mm/minute). Data were analyzed through Kruskal-Wallis and Mann-Whitney tests (p = 0.05). The extruded restorations were evaluated under a stereomicroscope (10×) for failure-mode evaluation. RESULTS: There were no statistically significant differences between the groups TET, Z250, and FUS, with 145.59, 108.91, and 104.12 MPa means, respectively. The FUSSE group (40.92 MPa) showed a statistically significant lower bond strength. The predominant failure mode was a mixed failure for all groups. CONCLUSION: The self-adhesive resin composite achieved a satisfactory result on bond strength when compared to conventional composites with regular and low viscosities, except when selective enamel etching was done. CLINICAL SIGNIFICANCE: This study shows that the clinicians must be aware of the viscosity of the phosphoric acid to avoid dentin contamination whenever performing selective enamel etching. And the self-adhesive resin composite studied presented as another restorative alternative.

Impact of Oral Health and Sociodemographic Factors on Quality of Life: A Cross-sectional Study.

Aim: The aim of this study was to determine the impact of oral health and socioeconomic variables on the quality of life in a sample of low-income Brazilians. Materials and methods: The sample consisted of 400 adults assisted by the Rescuing Smiles Social Program (Pernambuco University) in June 2014 in the town of Arcoverde, Pernambuco. Two 18+ physically and mentally healthy people were chosen to participate in the study per household. The data obtained were analyzed using Kruskal-Wallis and Mann-Whitney tests. Results: About 75% of participants were female, averaging 42.65 years; 59% had elementary schooling and 27% were illiterate; 63% of them needed dental restorative treatment, 59.5% periodontal, and 43.3% surgical procedures; and 68.2% of the respondents showed partial tooth loss, 22.8% were totally edentulous, and 9% had full dentition. Oral health impact profile (OHIP)-14 average score was 14.91, considered low. The highest averages were observed in low-income individuals (16.25). Individuals with total or partial tooth loss had an average 14.26 and 15.79, respectively, thus showing a statistically significant difference as compared with total dentate (9.86). Conclusion: Although low-income individuals with tooth loss showed the highest OHIP-14 averages, it could be concluded that oral condition did not affect the quality of life of most individuals in the population studied. Clinical significance: Thus, oral health did not have a significant impact on respondent health awareness. This study showed the need to better inform the public of the relevance of oral health to quality of life. Keywords: Oral health, Oral health impact profile-14, Quality of life.