Symmetrical activity of the chewing muscles and its relationship with skeletal class and body posture.

IF 2 4区医学 Q2 DENTISTRY, ORAL SURGERY & MEDICINE

Cranio-The Journal of Craniomandibular & Sleep Practice Pub Date : 2024-05-01 Epub Date: 2021-08-09 DOI:10.1080/08869634.2021.1960741

Sebastián Espinoza, Gabriela Peirano, Nancy Tapia, Patricia Venega, Norman Marfull

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引用次数: 0

Abstract

Objective: To describe the role of body posture and skeletal class in the symmetrical activity of chewing muscles.

Methods: Descriptive study with association. Skeletal class measured by the Steiner method. Postural analysis through APECS mobile application for forward head posture and shoulder discrepancy, and surface electromyography with Biopac® device.

Results: The skeletal class, forward head posture, and shoulder discrepancy presented statistical association with the symmetrical electromyographic response of digastric muscles and masseter muscles during swallowing.

Discussion: This study exhibited a positive relationship between digastric muscle symmetry and skeletal class during swallowing. The compensation of the hyoid system explains these results, showing that skeletal Class III has better electromyographic balance. In contrast, masseter muscle symmetry during swallowing presented a negative relationship with skeletal class. The stabilization role that this muscle plays during swallowing explains these findings, caused by the different lengths and direction of this muscle in skeletal Class III.

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咀嚼肌的对称活动及其与骨骼等级和身体姿势的关系。

目的：描述身体姿势和骨骼等级在咀嚼肌对称活动中的作用：描述身体姿势和骨骼等级在咀嚼肌对称活动中的作用：描述性研究。通过斯坦纳法测量骨骼等级。通过 APECS 移动应用程序对前头姿势和肩部偏差进行姿势分析，并使用 Biopac® 设备进行表面肌电图分析：结果：骨骼等级、前头姿势和肩部偏差与吞咽时地阔肌和咀嚼肌的对称肌电反应存在统计学关联：讨论：本研究显示，吞咽过程中，掘胸肌对称性与骨骼等级呈正相关。舌骨系统的补偿解释了这些结果，显示骨骼等级 III 具有更好的肌电平衡。相比之下，吞咽时的颌下肌对称性与骨骼等级呈负相关。骨骼Ⅲ级中这块肌肉的长度和方向不同，解释了吞咽过程中这块肌肉所起的稳定作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Cranio-The Journal of Craniomandibular & Sleep Practice DENTISTRY, ORAL SURGERY & MEDICINE-

CiteScore

4.50

自引率

12.50%

发文量

审稿时长

>12 weeks

期刊介绍： CRANIO: The Journal of Craniomandibular & Sleep Practice is the oldest and largest journal in the world devoted to temporomandibular disorders, and now also includes articles on all aspects of sleep medicine. The Journal is multidisciplinary in its scope, with editorial board members from all areas of medicine and dentistry, including general dentists, oral surgeons, orthopaedists, radiologists, chiropractors, professors and behavioural scientists, physical therapists, acupuncturists, osteopathic and ear, nose and throat physicians. CRANIO publishes commendable works from outstanding researchers and clinicians in their respective fields. The multidisciplinary format allows individuals practicing with a TMD emphasis to stay abreast of related disciplines, as each issue presents multiple topics from overlapping areas of interest. CRANIO''s current readership (thousands) is comprised primarily of dentists; however, many physicians, physical therapists, chiropractors, osteopathic physicians and other related specialists subscribe and contribute to the Journal.