A root-extended overlay design and finite element analysis for permanent molars with a 4-wall defect in adolescents

Key Points

• The aim is to create a root-extended overlay for mandibular first molars with 4-wall defects in adolescents and analyze its stress distribution.
• Developed a root-extended overlay design specific for permanent mandibular first molars.
• Conducted finite element analysis to evaluate the stress distribution of the new overlay design.
• Focused on molars with a 4-wall defect to assess structural integrity.
• The newly designed overlay demonstrated improved stress distribution compared to traditional approaches.
• Finite element analysis indicated that the overlay potentially enhances durability under occlusal forces.