An Optimized Dental Implant Model Using Finite Element Analysis and Design of Experiment.

Area of Science:

• Biomaterials Engineering
• Mechanical Engineering
• Dental Implantology

Background:

• Dental implant stability is crucial for successful osseointegration and long-term function.
• Optimizing implant thread design can enhance stress distribution and reduce mechanical complications.
• Current implant designs often require further refinement for improved biomechanical performance.

Purpose of the Study:

• To develop and optimize a novel dental implant design focusing on thread geometry.
• To analyze the biomechanical behavior of implants with varying square thread dimensions.
• To identify an optimal thread shape that minimizes stress concentrations.

Main Methods:

• Integrated finite element analysis (FEA) with numerical optimization techniques.
• Developed a mathematical model to represent critical dental implant parameters.
• Utilized response surface methodology (RSM) and design of experiments (DOE) for optimization.

Main Results:

• An optimal depth-to-width ratio of 0.7 for square threads was identified to minimize von Mises and shear stress under a 450 N load.
• Buttress threads demonstrated superior performance in reducing von Mises and shear stress compared to square threads.
• Optimal buttress thread parameters were determined: depth 0.45x pitch, width 0.3x pitch, and angle 17 degrees.

Conclusions:

• Buttress thread design offers superior stress reduction in dental implants.
• The optimized thread parameters enhance biomechanical stability and implant longevity.
• A constant implant diameter facilitates interchangeable use of standard 4-mm abutments.