IADR Abstract Archives
Clinical Performance of Universal Adhesives Used With/Without Phosphoric Acid Pre-Conditioning
Objectives: To compare the 5-year performance of restorations placed using mildly acidic universal adhesives Scotchbond Universal (SU, 3M Oral Care, St Paul, MN, USA) and Prime & Bond Elect (PBE, Dentsply Sirona, Charlotte, NC, USA) in the restoration of noncarious cervical lesions (NCCLs) in a randomized controlled clinical trial using etch & rinse (ER) and self-etch (SE) application modes.
Methods: The study (IRB #745.430/14) included two-hundred-three NCCLs in 63 patients that were restored with Kalore (GC Corporation, Tokyo, Japan) after application of either SU or PBE following the ER or SE techniques. Restorations were examined at 60 months. Statistical analyses evaluated the change of outcome overtime as assessed by Modified USPHS criteria (i.e., Alfa vs Bravo and Charlie outcomes). Logistic regression was performed for each outcome separately with compound symmetric variance-covariance structure assumed to consider a correlation of restorations within subjects (SAS, Cary, NC).
Results: One hundred and thirty restorations in 35 subjects were assessed at the 60-month follow-up. Restorations placed using various methods demonstrated 5-year retention as follows: SU_ER – 32/34(93.8%), SU_SE – 31/31(100%), PBE_ER – 31/31(100%), PBE_SE – 33/36(90.9)%. No secondary caries was detected. Statistically significant differences were: a) Restorations placed with SU_SE were 64% less likely to maintain an Alfa score for marginal discoloration than those with PBE_ER (OR 0.36, 95% CI: 0.17-0.75, p=0.01); and b) PBE_SE restorations were 58% less likely to maintain a score of Alfa for marginal discoloration than PBE_ER restorations (OR 0.42, 95% CI: 0.19-0.96, p=0.04).
Conclusions: SU and PBE demonstrated acceptable clinical performance at 60 months in both SE and ER modes. Phosphoric-acid etching of the NCCLs prior to PBE adhesive application statistically significantly improved restoration performance with regard to marginal discoloration. The ER application method of adhesive application generally resulted in less marginal discoloration and better marginal adaptation though these trends were not statistically significant.
Methods: The study (IRB #745.430/14) included two-hundred-three NCCLs in 63 patients that were restored with Kalore (GC Corporation, Tokyo, Japan) after application of either SU or PBE following the ER or SE techniques. Restorations were examined at 60 months. Statistical analyses evaluated the change of outcome overtime as assessed by Modified USPHS criteria (i.e., Alfa vs Bravo and Charlie outcomes). Logistic regression was performed for each outcome separately with compound symmetric variance-covariance structure assumed to consider a correlation of restorations within subjects (SAS, Cary, NC).
Results: One hundred and thirty restorations in 35 subjects were assessed at the 60-month follow-up. Restorations placed using various methods demonstrated 5-year retention as follows: SU_ER – 32/34(93.8%), SU_SE – 31/31(100%), PBE_ER – 31/31(100%), PBE_SE – 33/36(90.9)%. No secondary caries was detected. Statistically significant differences were: a) Restorations placed with SU_SE were 64% less likely to maintain an Alfa score for marginal discoloration than those with PBE_ER (OR 0.36, 95% CI: 0.17-0.75, p=0.01); and b) PBE_SE restorations were 58% less likely to maintain a score of Alfa for marginal discoloration than PBE_ER restorations (OR 0.42, 95% CI: 0.19-0.96, p=0.04).
Conclusions: SU and PBE demonstrated acceptable clinical performance at 60 months in both SE and ER modes. Phosphoric-acid etching of the NCCLs prior to PBE adhesive application statistically significantly improved restoration performance with regard to marginal discoloration. The ER application method of adhesive application generally resulted in less marginal discoloration and better marginal adaptation though these trends were not statistically significant.