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Mechanical characterization of soft-tissue stiffness during mandibular distraction
Anh-Claire Bildstein1, Guillaume Dubois2, Renaud Preud'homme1
1Department of Maxillo Facial Surgery, Caen University Hospital, France.
Summary
This study measured the stiffness of human mandibular soft tissues during distraction, finding it to be 9.12 ± 3.56 N/mm. These findings will aid in designing improved mandibular distraction devices.
Area of Science:
- Biomedical Engineering
- Oral and Maxillofacial Surgery
- Biomechanics
Background:
- Mandibular distraction osteogenesis is crucial for treating craniofacial deformities.
- Current distraction devices can be improved by better understanding the mechanical properties of surrounding tissues.
- The stiffness of mandibular soft tissues during distraction has not been directly measured.
Purpose of the Study:
- To determine the stiffness of human mandibular soft tissues during distraction.
- To provide data for the enhancement of mandibular distraction devices, including automated continuous distractors.
Main Methods:
- Uncompleted osteotomy (greenstick fracture) was performed on 11 fresh human hemimandibles to preserve periosteum.
- Uniaxial quasi-static tensile tests were conducted to simulate continuous distraction.
- Linear regression analysis of force-displacement curves (10-20 N) was used to determine stiffness.
Main Results:
- The mean stiffness of the mandibular soft tissues was measured to be 9.12 ± 3.56 N/mm.
- This represents the first direct measurement of the stiffness of human mandibular corpus surrounding tissues.
Conclusions:
- The quantified stiffness provides critical biomechanical data for mandibular distraction.
- This research facilitates the development of next-generation mandibular distraction devices with enhanced performance and predictability.
