Evaluating the Impact of Vertical Dimension on Masticatory Muscle Activity during Clenching in Complete Denture Wearers: An Electromyographic (EMG) Analysis
Aims: This study aimed to investigate the impact of vertical dimension (VD) on the activity of masticatory muscles during clenching in complete denture wearers using electromyography (EMG)
Materials and Methods: A group of participants with complete dentures participated in the study. Three VD conditions were established for each participant: ideal VD, increased VD (VDO+3mm), and decreased VD (VDO3mm). Surface EMG electrodes were placed on the masseter and temporalis muscles bilaterally. Participants performed standardized clenching tasks at each VD condition, and EMG data was recorded. Statistical analysis was conducted to assess the influence of VD on muscle activity.
Results: The results revealed significantly lower electrical activity in both masseter and temporalis muscles at the ideal VD compared to increased or decreased VD conditions. No significant difference in muscle activity was observed between VDO+3mm and VDO-3mm conditions.
Conclusion: Achieving an accurate vertical dimension is crucial for maintaining balanced muscle activity during clenching in complete denture wearers. Deviations from the ideal VD lead to increased activity in masticatory muscles, potentially contributing to discomfort or fatigue. These findings highlight the importance of accurate VD determination in complete denture fabrication for optimal patient comfort and function.
