Endocrown Feasibility for Primary Molars: A Finite Element Study.

Area of Science:

• Dental Materials Science
• Biomaterials Engineering
• Pediatric Dentistry

Background:

• Pediatric endocrowns offer a conservative approach to restoring primary molars.
• Finite element analysis (FEA) is a valuable tool for simulating biomechanical behavior in dental restorations.

Purpose of the Study:

• To evaluate the biomechanical feasibility of using pediatric endocrowns for restoring the second primary molar.
• To compare the stress distribution and deformation patterns of zirconia (Zr) and E-max endocrowns with different cementation materials.

Main Methods:

• A 3D finite element model of a pediatric mandibular molar was created using laser scanning.
• Simulations were performed using zirconia and E-max for endocrowns and glass ionomer and resin cement.
• Mechanical loads were applied vertically, obliquely (45 degrees), and laterally to assess stress and deformation.

Main Results:

• Stress and deformation patterns were within physiological tolerance limits across tested materials.
• Changing endocrown and cement materials had negligible effects on overall deformation.
• Zirconia endocrowns exhibited stress patterns suggesting a longer functional lifetime compared to E-max.

Conclusions:

• Both zirconia and E-max endocrowns are suitable for restoring primary molars.
• Zirconia endocrowns demonstrate superior durability potential over E-max.
• The choice of endocrown and cement material showed minimal impact on the surrounding bone structure.