Optimization Analysis of Two-Factor Continuous Variable between Thread Depth and Pitch of Microimplant under Toque...

Area of Science:

• Biomedical Engineering
• Orthodontics
• Materials Science

Background:

• Microimplants are crucial orthodontic anchorage devices.
• Controlling tooth torque is essential for effective orthodontic treatment.
• Developing microimplants with improved torque force application is needed.

Purpose of the Study:

• To determine optimal thread depth and pitch for microimplants under torque force.
• To analyze biomechanical perspectives for clinical microimplant design.
• To enhance microimplant stability and performance during orthodontic tooth movement.

Main Methods:

• Utilized Finite Element Analysis (FEA) and optimization design technology.
• Investigated thread depth (D: 0.1-0.4mm) and pitch (P: 0.4-1mm) as continuous variables.
• Analyzed maximum equivalent stress (Max EQV) in cortical bone and maximum displacement (Max DM) of the microimplant under 6 Nmm torque.

Main Results:

• Optimal pitch range for reduced cortical bone stress: 0.55mm ≤ P ≤ 1mm.
• Optimal thread depth range for reduced microimplant displacement: 0.1mm ≤ D ≤ 0.35mm.
• These ranges indicate improved initial stability under applied torque.

Conclusions:

• Microimplants with pitch 0.55-1mm and depth 0.1-0.35mm offer better initial stability.
• Optimized parameters minimize cortical bone stress and microimplant displacement.
• Findings guide clinical design for enhanced microimplant performance in orthodontics.