Two-year assessment of anterior resin restorations inserted with two acid-etch restorative procedures.
Fifty-two pairs of Class III restorations in a microfilled resin Silar were inserted in acid-etched cavities. A bevel preparation was performed along the margin of one cavity (A) whereas the other cavity was treated with the surface-active comonomer NPG-GMA before filling (B). After finishing of the restorations, the surface of the type B filling was re-etched and covered with a layer of non-composite, low-viscous resin. Following a 2-yr observation period 65 restorations were classified as "good", 33 were "adequate" and 4 were "unsatisfactory" or were replaced during the study period. The only significant difference between type A and type B restorations was marginal discolorations which most frequently were observed along the beveled type A restorations. The occurrence of such failures was increased by marginal deficiencies and occlusion/articulation on the restorations.
D000134:Acid Etching, Dental; D000180:Acrylic Resins; D017438:Bisphenol A-Glycidyl Methacrylate; D003188:Composite Resins; D001840:Dental Bonding; D003737:Dental Cavity Preparation; D003774:Dental Plaque Index; D003793:Dental Restoration, Permanent; D005881:Gingiva / Q000033:anatomy & histology; D006801:Humans; D013499:Surface Properties; D013997:Time Factors
D000180:Acrylic Resins; D003188:Composite Resins; D017438:Bisphenol A-Glycidyl Methacrylate; C033930:Silar (3M)