contemporary orofacial science

en Comparison of Tensile Bond Strength of Four Types of Artificial Teeth to Acrylic Denture Base Under In Vitro Conditions پروتزهای دندانی Prosthodontics پژوهشي Research Background: Detachment of artificial teeth from the denture acrylic base is a significant complication among denture users. This study aimed to compare the tensile bond strength of four types of artificial teeth to the acrylic denture base. Materials and Methods: This in vitro experimental study investigated 36  samples of four types of artificial teeth: Ivoclar composite, Ivoclar porcelain, Yamahachi, and Maroli. Nine maxillary first premolar teeth from each type were selected. Grooves measuring 3 mm in depth and 2 mm in length were created on the occlusal surface of each tooth, and this surface was embedded in self-cure acrylic up to the CEJ level. The smallest cross-sectional area among the samples was selected as the standard, and all specimens were adjusted to match this area. The primary casts were poured, cylindrical wax models were attached to the specimen bases, and flasking was performed. After replacing the wax with heat-cured acrylic, the final samples were subjected to tensile testing on a universal electromechanical testing machine until failure. Data were analyzed using one-way ANOVA and Tukey's post hoc test(α= 0.05). Results: A statistically significant difference in mean tensile bond strength was observed among the four groups (P < 0.001), with Ivoclar composite showing the highest mean tensile bond strength, followed by Ivoclar porcelain, Yamahachi, and Maroli. The percentage of adhesive failures in Ivoclar composite, Ivoclar porcelain, Yamahachi, and Maroli samples was 77.8%, 66.7%, 55.6%, and 77.8%, respectively. Conclusion: The highest tensile bond strength was observed in Ivoclar composite teeth, followed by Ivoclar porcelain, Yamahachi, and Maroli.   1 7 http://cofs.khuisf.ac.ir/browse.php?a_code=A-10-1-64&slc_lang=en&sid=1 Ali Nurmohammadi 1003194753284600970 1003194753284600970 No Faculty of Dentistry, Isf.C, Islamic Azad University, Isfahan, Iran Mojtaba Shahtoosi 1003194753284600971 1003194753284600971 Yes Department of Prosthodontic, Faculty of Dentistry, Isf.C, Islamic Azad University, Isfahan, Iran Meysam Mahabadi 1003194753284600972 1003194753284600972 No Department of Prosthodontic, Faculty of Dentistry, Isf.C, Islamic Azad University, Isfahan, Iran Elham Delshad 1003194753284600973 1003194753284600973 No Department of Prosthodontic, Faculty of Dentistry, Isf.C, Islamic Azad University, Isfahan, Iran