Influence of bonding agents on fracture force and fatigue performance of temporary fixed dental prostheses: an in vitro study
- Autores: Friedrich Johannes Fleiner, Anne Marie Sroka, Sebastian Hahnel, Martin Rosentritt
- Localización: Quintessence International, ISSN-e 0033-6572, Nº. 6, 2026, págs. 512-519
- Idioma: inglés
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Resumen
Objectives: To investigate the influence of various bonding agents on the fatigue performance and fracture forces of temporary fixed dental prostheses (TFDPs).
Method and materials: Temporary and permanent cements were used to lute TFDPs fabricated by CAD/CAM milling and digital light processing (DLP) printing. Thermocycling and mechanical loading (TCML) was conducted, simulating clinical service for a period of 2 years. Following TCML, all specimens were loaded until failure and fracture forces were measured. TFDPs after water storage (24 hours) were investigated as control. The following statistics (α = 0.95) were performed: Shapiro–Wilk test (Box–Cox transformation), Mann–Whitney U test (Holm correction), Fisher Exact test, Kaplan–Maier survival.
Results: Milled TFDPs showed a survival rate of 100% for all cementations, while additively manufactured restorations featured survival rates between 0% and 63%. For additively fabricated TFDPs, temporary and conventional cements produced significantly (P ≤ .001) lower survival rates than self-adhesive or adhesive composite resins. Fracture forces after water storage ranged between 807 N and 2,287 N. After TCML, fracture forces ranged between 463 N and 1,738 N, with significant differences (P .05).
Conclusion: Additively manufactured TFDPs should be cemented self-adhesively or adhesively if intended for prolonged clinical service, while milled TFDPs might also be cemented temporarily to achieve a similar performance.
