A novel method for simulating ex vivo tooth extractions under varying applied loads.

Area of Science:

• Biomechanics
• Dental surgery
• Materials science

Background:

• Tooth extraction is a common procedure with variable outcomes.
• Limited biomechanical data exists on the relationship between extraction forces and dentoalveolar remodeling.
• Understanding these mechanics is crucial for improving surgical success.

Purpose of the Study:

• To present a novel ex vivo experimental method for measuring tooth extraction mechanics.
• To explore preliminary metrics for predicting extraction success.
• To investigate the influence of loading parameters on extraction outcomes.

Main Methods:

• Developed a custom apparatus for ex vivo swine mandible central incisor extraction.
• Conducted extractions using five different schemes (displacement- and force-controlled, ramp-hold).
• Recorded peak forces and extraction success; analyzed video for instantaneous stiffness using K-means clustering.

Main Results:

• Extraction forces ranged from 102 N to 309 N.
• Higher loading rates correlated with higher peak forces (141 N - 308 N) compared to lower rates (102 N - 204 N).
• K-means clustering confirmed that higher load rates increased system stiffness.

Conclusions:

• The developed experimental method offers good control for studying extraction biomechanics.
• Preliminary results indicate load rate significantly influences the mechanical response and outcome of tooth extraction.
• Further research will correlate biomechanics with tissue damage to refine extraction procedures.