ผลของการปรับสภาพพื้นผิวเดือยฟันเส้นใยควอตซ์ด้วยสารเคมีต่อค่าความต้านทานการแตกของฟันรักษาคลองราก / สุชาวดี หุตะสิงห์ = Effect of chemical surface treatment of quartz fiber post on fracture resistance of endodontically treated teeth / Suchawadee Hutasingh
The objective of this study was to compare the fracture resistance of endodontically treated teeth restored with quartz fiber posts, which their surfaces were treated with different chemical agents. Sixty mandibular second premolars were removed coronal portions at a level 2 mm. above the CEJ. The remaining root received endodontic therapy and post space preparation. The specimens were randomly assigned to 6 groups (n=10). Group 1 was restored without surface treatment of post. Group 2 was treated with hydrogen peroxide 24% for 10 minutes. Group 3 was treated with hydrogen peroxide 30% for 5 minutes. Group 4 was treated with hydrogen peroxide 35% for 5 minutes. Group 5 was treated with hydrofluoric acid 5% for 5 seconds. And group 6 was treated with sodium hypochlorite 10% for 10 minutes. Posts were cemented and cores were built up with Multicore Flow® and then teeth were restored using full metal crown. The specimens were loaded with universal testing machine (Instron®). Mean fracture loads of all specimens were analyzed using the one-way ANOVA and Bonferroni test. The fracture loads of group 2, 3 and 5 were significantly greater than group 1. However, difference of chemical surface treatment of fiber post did not affect on fracture resistance of endodontically treated teeth.
