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    Hall technique crowns and children's masseter muscle activity: A surface electromyography pilot study

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    304-2019.18 Salsabeel Abu Serdaneh.pdf (644.8Kb)
    Date
    2019
    Author
    Abu Serdaneh, Salsabeel
    Al Halabi, Manal
    Kowash, Mawlood
    Khamis, Ammar H.
    Salami, Anas
    Hussein, Iyad
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    Abstract
    Background: Hall technique crowns (HTCs) alter the occlusion temporarily, potentially affecting jaw muscles, particularly the masseter – the primary jaw-closing muscle. Aim: To assess masseter muscle activity (MMA) in children treated with a unilateral HTC. Design: In 12 children treated with a single HTC, bilateral MMA was recorded with surface electromyography (sEMG) for ten cycles of Rest Position (RP) and Maximum Voluntary Clenching (MVC) over 20 seconds immediately pre-HTC cementation (Pbase), immediately post-HTC cementation (Pimmed), at 2 weeks post-HTC cementation (P2w) and at 6 weeks post-HTC cementation (P6w). t test, ANOVA and post hoc statistics were used (P < .05). Results: As expected, MMA was low at rest and increased during maximal jaw clenching (P < .0001). MMA (mean ± SD) increased significantly y (P < .001) between RP and MVC at: Pbase [from 1.60 μV·s (±0.96) to 5.40(±2.30)]; Pimmed [1.57(±1.15) to 3.75(±1.87)]; P2w [1.39(±0.54) to 5.54(±1.45)] and finally P6w [1.46(±0.56) to 6.45(±2.56)]. Rest MMA at Pbase, Pimmed, P2w and P6w remained unchanged (P = .18) whereas Pbase clench MMA reduced by a third at Pimmed d d (P < .001), returned to and exceeded baseline levels at P2w (P = .822) and P6w (P < .001) respectively. Conclusions: This pilot study showed that Hall technique crowns may affect masseter muscle activity in children. Clench MMA was reduced immediately post-treatment but returned to and later exceeded baseline levels at 2 and 6 weeks, respectively. Rest MMA remained unchanged.
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    https://repository.mbru.ac.ae/handle/1/518
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