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Three-dimensional mandibular motion in skeletal Class III patients
Alessandro Ugolini1, Andrea Mapelli1, Marzia Segù1
1a Functional Anatomy Research Center (FARC), Laboratorio di Anatomia Funzionale dell'Apparato Stomatognatico (LAFAS), Facoltà di Medicina e Chirurgia, Dipartimento di Scienze Biomediche per la Salute , Università degli Studi di Milano , Milano , Italy.
Cranio : the Journal of Craniomandibular Practice
|March 18, 2017
Summary
Skeletal Class III malocclusion patients exhibit reduced mandibular condylar motion, particularly in translational pathways. This study analyzed condylar movement characteristics in these patients compared to controls.
Area of Science:
- Orthodontics
- Biomechanical analysis
- Craniofacial morphology
Background:
- Skeletal Class III malocclusion is characterized by specific jaw relationships.
- Understanding mandibular condylar motion is crucial for diagnosing and treating malocclusions.
Purpose of the Study:
- To analyze the characteristics and changes in mandibular condylar motion in patients with skeletal Class III malocclusion.
- To compare condylar motion between skeletal Class III patients and Angle Class I controls.
Main Methods:
- Utilized a 3D motion analyzer to record mandibular movements.
- Included 9 patients with skeletal Class III malocclusion and 22 control subjects with Angle Class I jaw relationships.
Main Results:
- Skeletal Class III patients showed reduced condylar displacement on sagittal and frontal planes compared to controls.
- Condylar translation paths were smaller in Class III patients.
- A larger overall condylar rotation component was observed in Class III patients, especially during initial mouth opening.
Conclusions:
- Mandibular condylar motion, particularly translational movement, is significantly reduced in patients with skeletal Class III malocclusion.
- Altered condylar motion patterns may contribute to the pathophysiology of skeletal Class III malocclusion.
