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Fracture resistance among post and core systems: An in vitro study
Kamil Shahnawaz1, Swati Sagar1, Kartik Salarias2
1Department of Dentistry, Darbhanga Medical College & Hospital, Laheriasarai, Darbhanga, Bihar-846003, India.
Abstract:
Endodontically treated teeth are highly susceptible to fracture due to loss of structural integrity. Therefore, it is of interest to compared fracture resistance and failure patterns among cast metal, prefabricated metal and fiber post-and-core systems under standardized conditions. Thirty mandibular premolars were endodontically treated, restored and subjected to oblique compressive loading at 135°C until failure. Fiber posts showed the highest fracture resistance (615 ± 50 N) and predominantly favorable, repairable fractures (80%), whereas metal posts exhibited lower resistance and mainly unfavorable root fractures (p < 0.001). Thus, we show controlled biomechanical evidence supporting fiber posts as a superior restorative option for preserving root integrity.
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