Akira Okubo, Takanori Tsujimura, Rumi Ueha, Taku Suzuki, Eri Takei, Anna Sasa, Yuhei Tsutsui, Yuta Nakajima, Jin Magara, Makoto Inoue
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引用次数: 0
Abstract
Background: Chewing well (CW) is widely recommended for general health.
Objective: The study aimed to consider what healthy participants associated with the instruction of 'CW' and to investigate the effects of CW on masticatory activity and bolus flow during rice chewing.
Methods: Twenty-six healthy participants ate 8, 12 and 16 g of steamed rice with barium sulphate under the following two instructions: chewing freely and CW. We investigated the masticatory muscle activity by electromyography (EMG) and the bolus flow by videofluoroscopy. A paired t-test or Wilcoxon signed-rank test was used to analyse data.
Results: All participants associated the 'CW' instruction with 'chewing for a long time'. CW shortened the masseter (Mas) EMG burst duration per chewing cycle (p < 0.001). At 8 and 12 g, CW decreased the suprahyoid (Shy) EMG activity per chewing cycle (p < 0.05) and increased the ratio of valleculae and hypopharyngeal time (VHT) to chewing time (p < 0.01). CW increased the chewing rate in the VHT for 8 and 12 g (p < 0.05) and in the processing time for 16 g (p < 0.05) in the participants who reached the food bolus in the valleculae area during chewing.
Conclusion: CW decreased the Mas activity during chewing at all volumes, while its effects on the Shy activity and bolus flow during chewing depended on the mouthful volume. CW increased the chewing rate in the final stage for the small and medium volumes, and in the early stage for the large volume.
期刊介绍：
Journal of Oral Rehabilitation aims to be the most prestigious journal of dental research within all aspects of oral rehabilitation and applied oral physiology. It covers all diagnostic and clinical management aspects necessary to re-establish a subjective and objective harmonious oral function.
Oral rehabilitation may become necessary as a result of developmental or acquired disturbances in the orofacial region, orofacial traumas, or a variety of dental and oral diseases (primarily dental caries and periodontal diseases) and orofacial pain conditions. As such, oral rehabilitation in the twenty-first century is a matter of skilful diagnosis and minimal, appropriate intervention, the nature of which is intimately linked to a profound knowledge of oral physiology, oral biology, and dental and oral pathology.
The scientific content of the journal therefore strives to reflect the best of evidence-based clinical dentistry. Modern clinical management should be based on solid scientific evidence gathered about diagnostic procedures and the properties and efficacy of the chosen intervention (e.g. material science, biological, toxicological, pharmacological or psychological aspects). The content of the journal also reflects documentation of the possible side-effects of rehabilitation, and includes prognostic perspectives of the treatment modalities chosen.
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