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Endocrown-retained fixed partial dentures: Revolutionizing tooth restoration or risky business? A finite element
Nivedha Muthukumar1, Parthasarathy Natarajan1, Seenivasan Madhan Kumar1
1Department of Prosthodontics, Sri Ramachandra Dental College and Hospital, SRIHER, Chennai, Tamil Nadu, India.
Aim:
This study aimed to compare the biomechanical performance of endocrown-retained and post-and-core-retained fixed partial dentures (FPDs), focusing on stress distribution, tensile, and shear stress.
Materials And Methods:
Finite element analysis was used to simulate occlusal loading on two FPD designs: endocrown-retained zirconia and post-and-core-retained zirconia which were subjected to a simulated occlusal load of 150 N. Stress distribution was analyzed using von Mises stress, tensile stress, and shear stress. Material properties for zirconia, resin cement, enamel, dentin, bone, Periodontal ligament (PDL), and fiber post were incorporated.
Results:
The endocrown design showed lower von Mises stress (176.35 MPa) than the post-and-core design (298.29 MPa). It also had lower shear stress at the cement interface and reduced stress on abutment teeth.
Conclusion:
Endocrown-retained FPDs provide better stress distribution and structural integrity, offering a reliable, minimally invasive option for restoring endodontically treated molars.
Clinical Significance:
Endocrown retained 3-unit fixed partial denture can be a promising alternative to the fiber-post retained FPD for restoring molars with extensive tooth loss.
