‘Effect of early correction of posterior crossbite on masticatory muscle activity using surface electromyography – a systematic review and meta-analysis’
Background Posterior crossbite (PCB) is a common malocclusion in primary and early mixed dentition with long-term implications for the stomatognathic system. Electromyographic (EMG) evaluation provides insights into masticatory muscle activity alterations associated with PCB and its correction. Alth...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Taylor & Francis Group
2025-05-01
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| Series: | Clinical and Investigative Orthodontics |
| Subjects: | |
| Online Access: | https://www.tandfonline.com/doi/10.1080/27705781.2025.2510023 |
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| Summary: | Background Posterior crossbite (PCB) is a common malocclusion in primary and early mixed dentition with long-term implications for the stomatognathic system. Electromyographic (EMG) evaluation provides insights into masticatory muscle activity alterations associated with PCB and its correction. Although three systematic reviews have examined EMG activity in masticatory muscles among individuals with PCB, none have focused solely on EMG and specific muscle activity changes from early PCB correction. These reviews have limitations, such as restricted search strategies and lack of structured protocols, compromising transparency and reproducibility.Objective This systematic review, following PRISMA guidelines and registered with PROSPERO, aimed to assess how early PCB correction affects masticatory muscle activity in children and young adults.Methods A comprehensive database search yielded nine relevant studies meeting inclusion criteria. Data extraction included study design, sample characteristics, intervention details, and EMG parameters. Risk of bias was assessed using MINORS criteria, and statistical analysis employed RevMan 5.3 for meta-analyses.Results Results showed increased EMG activity in the masseter and temporalis muscles post-treatment, indicating improved muscle function and occlusal stability. Within-subject analyses revealed restored muscle activity balance following maxillary expansion, impacting mandibular function. Comparisons between PCB and control groups highlighted enhanced muscle activation post-treatment, supporting early intervention effectiveness. Limitations included study protocol heterogeneity and insufficient blinding, requiring cautious result interpretation.Conclusions Early orthodontic intervention for PCB positively affects masticatory muscle activity, promoting occlusal stability and mandibular function. This review underscores the importance of EMG in assessing treatment outcomes and advocates for further research to understand long-term effects on oral health and well-being. |
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| ISSN: | 2770-5781 2770-579X |