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- DOI 10.18231/j.aprd.36854.1761126931
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CrossMark
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Effect of hard and soft occlusal splints on EMG activity of inferior lateral pterygoid muscle in patients with mild to moderate occlusal wear - A randomized control trial
- Author Details:
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Bharat Raj R
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Parmeet Kaur
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Anupama NM
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Nalinakshamma Muniswamy Reddy
Introduction: Tooth wear is a complex phenomenon with multifactorial aetiology & high prevalence. Permissive splints help in muscle deprogramming and restoring the stability of TMJ. It is crucial to study the effects of splints on muscle activity, the optimal duration of wear of these splints to bring the desired effect, and the difference in the action of splints fabricated in different materials.
Objective: To compare the effect of hard and soft splints on EMG activity of Pterygoids in patients with moderate to severe tooth wear at different intervals.
Materials and Methods: Participants within the age range of 18–30 years having wear of teeth were allocated into group I HS (n=5) receiving hard splints and group II SS (n=5) receiving soft splints and a control group without splints (n=5). Electromyography (EMG) activity for inferior belly of lateral pterygoid muscle was recorded during postural rest position (PRP) and maximum voluntary clenching (MVC) at baseline (T0), 24 hours (T1) and at 8 weeks (T2) with and without splint. Nonparametric tests were used for within-group and intergroup comparisons, followed by post hoc analysis with Bonferroni correction.
Results: Baseline EMG activity was higher in soft splint experimental groups but the difference was nonsignificant (p > 0.05). At 24 hours, both the groups showed significantly lower (p < 0.05) EMG activity with the splint as compared to without the splint. Hard splints led to decreased muscle activity, while soft splints led to an increase at 8 weeks as compared to baseline EMG activity of controls, and the difference was nonsignificant. The intergroup comparison revealed insignificant differences at all-time intervals (p > 0.05).
Conclusion: Muscle activity varied with different materials of the splint and duration of use. Both splints helped in the adaptation of muscles to new vertical dimensions of occlusion at 8 weeks with lesser variation between with and without splint position.
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How to Cite This Article
Vancouver
R BR, Kaur P, NM A, Reddy NM. Effect of hard and soft occlusal splints on EMG activity of inferior lateral pterygoid muscle in patients with mild to moderate occlusal wear - A randomized control trial [Internet]. IP Ann Prosthodont Restor Dent. 2025 [cited 2025 Oct 27];11(3):229-235. Available from: https://doi.org/10.18231/j.aprd.36854.1761126931
APA
R, B. R., Kaur, P., NM, A., Reddy, N. M. (2025). Effect of hard and soft occlusal splints on EMG activity of inferior lateral pterygoid muscle in patients with mild to moderate occlusal wear - A randomized control trial. IP Ann Prosthodont Restor Dent, 11(3), 229-235. https://doi.org/10.18231/j.aprd.36854.1761126931
MLA
R, Bharat Raj, Kaur, Parmeet, NM, Anupama, Reddy, Nalinakshamma Muniswamy. "Effect of hard and soft occlusal splints on EMG activity of inferior lateral pterygoid muscle in patients with mild to moderate occlusal wear - A randomized control trial." IP Ann Prosthodont Restor Dent, vol. 11, no. 3, 2025, pp. 229-235. https://doi.org/10.18231/j.aprd.36854.1761126931
Chicago
R, B. R., Kaur, P., NM, A., Reddy, N. M.. "Effect of hard and soft occlusal splints on EMG activity of inferior lateral pterygoid muscle in patients with mild to moderate occlusal wear - A randomized control trial." IP Ann Prosthodont Restor Dent 11, no. 3 (2025): 229-235. https://doi.org/10.18231/j.aprd.36854.1761126931