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The pullout force for Mitek mini and micro suture anchor systems in human mandibular condyles
R T Fields1, L E Cardenas, L M Wolford
1Baylor College of Dentistry, Dallas, TX, USA.
Summary
The Mitek mini anchor system demonstrated superior pullout strength compared to the micro anchor system in mandibular condyle testing. This finding is crucial for selecting appropriate orthopedic fixation devices.
Area of Science:
- Orthopedic biomechanics
- Surgical implant technology
Background:
- Suture anchors are vital for soft tissue reattachment in orthopedic surgery.
- Understanding anchor biomechanical performance is essential for clinical success.
Purpose of the Study:
- To compare the pullout forces and failure modes of Mitek mini and micro suture anchors.
- To evaluate anchor performance when inserted into the posterior mandibular condyle.
Main Methods:
- Twenty human cadaver mandibular condyles were used.
- Mitek mini and micro suture anchors were implanted and subjected to pullout testing using an Instron machine.
- Pullout force and mode of failure were recorded for each anchor.
Main Results:
- The mini anchor system exhibited a significantly higher mean pullout force (16.02 lbs) than the micro anchor system (10.57 lbs).
- Mini anchors failed primarily by pulling through cortical bone (90%), while micro anchors showed deformation (65%) or suture breakage (25%).
Conclusions:
- The Mitek mini suture anchor system provides greater pullout strength from the mandibular condyle compared to the micro anchor system.
- The distinct failure modes suggest different biomechanical characteristics influencing clinical application.