fa Effects of Ultraviolet Irradiation on the Bond Strength of a Composite Resin Adhered to Stainless Steel Crowns کودکان Pediatric Dentistry پژوهشي Research <p> <strong>Purpose:</strong></p><p>  A technique whereby the practitioner could improve the esthetic appearance of anterior stainless steel crowns (SSC) could provide a cost-effective alternative to more expensive commercially available preveneered SSCs, which may not be uniformly available. The purpose of this study was to evaluate the effects of ultraviolet (UV) irradiation of the metal crown surface on the shear bond strength of composite resin adhered to stainless steel crowns. </p><p> <strong>Methods:</strong></p><p>  Seventy extracted anterior bovine teeth randomly divided into 2 groups (n=35/group), were restored with primary maxillary left central incisor SSCs. Surface roughening with a green stone was performed on the labial surfaces, and the crowns of the experimental group were exposed to UV irradiation for 80 minutes. All samples were treated with metal-composite adhesive, followed by composite opaquer. Standardized composite blocks were bonded on the treated surfaces, and the shear bond strength was tested at 1 mm/minute. The values were recorded in MPa and statistically analyzed. </p><p> <strong>Results:</strong></p><p>  The mean value of shear bond strength was significantly higher for the experimental group (19.7±4.3 MPa) than the control group (16.3±4.5 MPa).</p><p> <strong> Conclusion</strong>:</p><p>  Ultraviolet irradiation of primary tooth stainless steel crowns significantly increased the shear bond strength of composite resin adhered to the facial surface. </p><hr><p></p><p> <strong>Source: </strong>Journal of American Academy of ‍ Pediatric Dentistry</p><p> <a href="http://www.ingentaconnect.com/content/aapd/pd/2013/00000035/00000001/art00004jsessionid=u5n10ezntvyo.alexandra" target="_blank"><font color="#0000ff">Full Text</font></a></p> COMPOSITE RESINS; PEDIATRIC STAINLESS STEEL CROWNS; SHEAR BOND STRENGTH; ULTRAVIOLET IRRADIATION 0 0 http://idai.ir/browse.php?a_code=A-10-32-2517&slc_lang=fa&sid=1 Selene J. Baeza-Robleto 100319475328460011973 100319475328460011973 Yes Faculty of Dentistry, Autonomous University State of Mexico, Toluca City, State of Mexico, Mexico Dulce M. Villa-Negrete 100319475328460011974 100319475328460011974 No Faculty of Dentistry, Autonomous University State of Mexico, Toluca City, State of Mexico, Mexico René García-Contreras 100319475328460011975 100319475328460011975 No Dental Research Center (CIEAO), Department of Oral Health Sciences, Faculty of Dentistry, Autonomous University State of Mexico, Toluca City, State of Mexico, Mexico Rogelio J. Scougall-Vílchis 100319475328460011976 100319475328460011976 No Department of Orthodontics, Faculty of Dentistry, Autonomous University State of Mexico, Toluca City, State of Mexico, Mexico Luis J. Guadarrama-Quiroz 100319475328460011977 100319475328460011977 No Faculty of Dentistry, Autonomous University State of Mexico, Toluca City, State of Mexico, Mexico Norma L. Robles-Bermeo 100319475328460011978 100319475328460011978 No Department of Pediatric Dentistry, Faculty of Dentistry, Autonomous University State of Mexico, Toluca City, State of Mexico, Mexico