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Masticatory muscle transposition in primates: effects on craniofacial growth
Journal of Maxillofacial Surgery
|August 1, 1983
Summary
Altering infant primate masticatory muscle attachments significantly changed craniofacial growth. This study demonstrates that modifying muscle insertions can alter skeletal development patterns.
Area of Science:
- Craniofacial biology
- Developmental biology
- Primate anatomy
Background:
- Masticatory muscles play a crucial role in craniofacial development.
- Understanding muscle-skeletal interactions is key to comprehending growth patterns.
Purpose of the Study:
- To investigate the impact of early masticatory muscle transposition on craniofacial growth in infant primates.
- To determine if altering muscle attachments can modify skeletal development.
Main Methods:
- Serial cephalometry was used to track craniofacial changes.
- Electromyography (EMG) assessed muscle activity.
- Dry-skull preparations provided morphological data.
Main Results:
- Bilateral posterior transposition of masseter and temporalis muscles caused significant superior and anterior midfacial rotation.
- Marked skeletal morphological changes were observed post-transposition.
- Altered muscle attachments demonstrably influenced craniofacial growth patterns.
Conclusions:
- Early surgical alteration of masticatory muscle attachments can redirect craniofacial growth.
- This research highlights the plasticity of craniofacial skeletal development in response to muscular forces.

