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Influence of Occlusal Interference on the Mandibular Condylar Position
Samir Čimić1, Matea Žaja1, Sonja Kraljević1
1University of Zagreb School of Dental Medicine.
Acta Stomatologica Croatica
|October 30, 2016
Summary
Occlusal interferences cause immediate changes in condylar position within the temporomandibular joint. This study measured condylar shifts using ultrasound jaw tracking, revealing an average deviation of 0.48 mm.
Area of Science:
- Dentistry
- Biomechanics
- Temporomandibular Joint Disorders
Background:
- Occlusal interferences are common dental anomalies.
- Understanding their impact on temporomandibular joint (TMJ) mechanics is crucial for diagnosis and treatment.
Purpose of the Study:
- To quantify the immediate effect of artificial occlusal interferences on condylar position within the TMJ.
- To investigate the relationship between occlusal interferences and condylar displacement.
Main Methods:
- Ten participants underwent condylar position recording using a 6-DOF ultrasound jaw tracking device.
- Artificial occlusal interferences (1 mm composite resin) were introduced on the lower left second premolar.
- Condylar shifts were measured relative to the maximum intercuspation position using a Cartesian coordinate system.
Main Results:
- An average superior condylar shift of 0.17 mm (SD 0.39) was observed.
- The average linear deviation between maximum intercuspation and the occlusal interference position was 0.48 mm (SD 0.29).
- Individual deviations ranged from 0.17 mm to 1.19 mm.
Conclusions:
- Occlusal interferences induce immediate positional changes in TMJ condyles.
- Observed superior condylar shifts suggest a lever effect within the dental arches.
- Further research is necessary to evaluate the long-term progression of condylar position changes due to occlusal interferences.
