Kolbeck, Carola and Rosentritt, Martin and Handel, Gerhard (2006) Fracture strength of artificially aged 3-unit adhesive fixed partial dentures made of fiber-reinforced composites and ceramics: An in vitro study. QUINTESSENCE INTERNATIONAL, 37 (9). pp. 731-735. ISSN 0033-6572, 1936-7163
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Objective: The aim of this in vitro study was to examine the fracture strength of metal-free 3-unit adhesive fixed partial dentures (AFPDs) bonded to mandibular incisors. Method and Materials: Extracted human incisors were positioned in pairs in polymethyl methacrylate resin simulating a clinical anterior situation. Their lingual sides were prepared for adhesive retainers with surfaces and finishing lines in enamel. Eight 3-unit AFPDs were made on master casts per material system: Connect/belleGlass (Girrbach), StickNet (StickTech)/Sinfony (3M Espe), and Empress 2 (Ivoclar Vivadent). The dentures were bonded adhesively using the dual-curing system ED Primer/ Panavia F (Kuraray Europe) and aged by thermocycling (6,000 X 5 degrees C/55 degrees C H2O; 2 minutes each cycle) and mechanical loading (1.2 X 10(6) X 20 N with 1.66 Hz) in an artificial oral environment representing a wearing period of 5 years. The fracture strength was determined in a universal testing machine (UTM 1446, Zwick) at a speed of 1 mm/min, applying the load buccoincisally on the pontics. The different forms of failure were described optically. Medians (25th/75th percentiles) of the fracture results were calculated. Statistical analysis was performed using Mann-Whitney U and Kruskal-Wallis tests (P <=.05). Results: Five StickNet/Sinfony AFPDs and 7 Empress 2 restorations failed in the artificial oral environment. The remaining Empress 2 dentures showed the highest medians of fracture forces (339 [200/506] N) compared to Connect/belleGlass (257 [242/310] N) and StickNet/Sinfony (256 [204/347] N). Statistical comparisons showed no significant differences. Conclusion: Only Connect/belleGlass and Empress 2 showed sufficient resistance against mastication forces.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | MARGINAL ADAPTATION; CROWNS; TEETH; FPDS; fixed partial denture; fracture strength; metal free; minimally invasive |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Zahnärztliche Prothetik |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 26 Jan 2021 15:47 |
| Last Modified: | 26 Jan 2021 15:47 |
| URI: | https://pred.uni-regensburg.de/id/eprint/33994 |
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