[Maxillary sinus floor wall typing and three-dimensional finite element modelling of maxillary sinus internal...

Area of Science:

• Biomaterials Science
• Dental Implantology
• Finite Element Analysis

Context:

• Maxillary sinus lifting is a common procedure in dental implantology.
• The anatomical variations of the maxillary sinus floor can influence surgical outcomes.
• Understanding the biomechanical behavior of the sinus floor mucosa is critical for preventing complications.

Purpose:

• To evaluate the equivalent stress and displacement of the maxillary sinus floor mucosa using three-dimensional finite element analysis.
• To compare the biomechanical responses of mucosa under different maxillary sinus floor morphologies (shallow concave, deep concave, and convex).

Summary:

• Three-dimensional finite element models simulating maxillary sinus lifting were created for shallow concave, deep concave, and convex sinus floor shapes.
• Dynamic impact loads were applied to analyze biomechanical characteristics, revealing that the convex shape experienced the highest equivalent stress (0.62356 MPa) and displacement (0.003660 mm).
• Mucosal stress increased uniformly with axial displacement of the sinus lift ejector.

Impact:

• The study demonstrates a direct relationship between maxillary sinus floor morphology and mucosal stress levels during elevation.
• Convex sinus floor shapes induce significantly higher tension on the mucosa, potentially leading to adverse effects during internal lifting.
• These findings can inform surgical planning and technique refinement to minimize intraoperative risks and enhance the success of maxillary sinus augmentation.