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Evaluation of Strength of Different Crowns In Rehabilitation of Mandibular Posterior Regions: A Comparative Study
Mohammad A Lone1, Balwinder Kumar2, Sukumar Ragutla3
1Department of Prosthodontics, Government Dental College and Hospital, Srinagar, Jammu and Kashmir, India.
Objective:
To evaluate the strength of different crown materials used in the rehabilitation of mandibular posterior regions and to compare their performance under realistic conditions.
Methods:
A total of 90 crowns made from three materials-zirconia, lithium disilicate, and metal-ceramic-were tested using compressive load testing. Crowns were placed on standardized resin dies simulating mandibular molars and subjected to cyclic loading and fracture strength assessment.
Results:
Zirconia crowns exhibited the highest fracture resistance, followed by metal-ceramic and lithium disilicate crowns. Statistically significant differences were observed between the groups (P < 0.05).
Conclusions:
Zirconia crowns offer superior strength, making them ideal for mandibular posterior rehabilitation. However, the choice of material should also consider aesthetic requirements and patient-specific factors.
