Efficiency of Closed Mastication of Gummy Evaluated with Gnatho-hexagraph

Shima, Chiharu; Motegi, Etsuko; Horiuchi, Akiyo; Ishii, Takenobu; Nomura, Motoo; Nakao, Makoto; Sueishi, Katsuo

doi:10.2209/tdcpublication.2016-0017

Cited by 2 publications

(3 citation statements)

References 9 publications

(9 reference statements)

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“…In OPEN patients, masticatory jaw movement was characterized by a chopping stroke, in other words, a small lateral movement during mastication and less vertical movement. The finding of a chopping stroke was consistent with previous reports [ 33 , 34 , 35 ]. A chopping stroke is also observed in the scissor-bite side of patients with posterior scissor bite and patients with mandibular prognathism [ 36 ].…”

Section: Discussionsupporting

confidence: 92%

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Skeletal Anterior Open Bite Attenuates the Chewing-Related Increase in Brain Blood Flow

Kariya,

Kanzaki,

Kumazawa

et al. 2024

Dentistry Journal

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The masticatory function of patients with skeletal anterior open bite (OPEN) is reported to be impaired compared with that of patients with normal occlusion (NORM). In this study, we compared brain blood flow (BBF) in patients with OPEN and NORM and investigated the factors related to BBF during mastication in patients with OPEN. The study included 17 individuals with NORM and 33 patients with OPEN. The following data were collected: number of occlusal contacts, jaw movement variables during mastication, and BBF measured with functional near-infrared spectroscopy during chewing. The number of occlusal contacts, maximum closing and opening speeds, closing angle, and vertical amplitude were smaller in the OPEN than in the NORM group. Interestingly, BBF increased less in the OPEN group. Correlation analysis revealed that several parameters, including number of occlusal contacts and closing angle, were correlated with changes in BBF during mastication. These results suggest that not only occlusion but also jaw movement variables and factors related to masticatory muscles contribute to the chewing-related increase in BBF. In conclusion, BBF increases less during mastication in patients with OPEN than in those with NORM. In addition, the higher increase in BBF is correlated with jaw movement. Together, we discovered that OPEN exhibits significant adverse effects not only on masticatory function but also on brain function.

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Section: Discussionsupporting

confidence: 92%

“…Another explanation of chopping stroke in OPEN patients may be the lack of lip seal. Shima et al reported that masticatory motion with open lips is associated with chopping strokes, and they suggested that abnormal function of the lips, jaw, masticatory muscles, and tongue interferes with masticatory efficiency [ 33 ].…”

Section: Discussionmentioning

confidence: 99%

Skeletal Anterior Open Bite Attenuates the Chewing-Related Increase in Brain Blood Flow

Kariya,

Kanzaki,

Kumazawa

et al. 2024

Dentistry Journal

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“…In the future, the association between horizontal movement and MP must also be investigated through motion capture. Furthermore, another study indicated the association between lip closure and MP; 37 therefore, we will analyse lip motions using the system adopted in this study to investigate their association with MP.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of masticatory performance by motion capture analysis of jaw movement

Imaoka

Okuno

Kobuchi

et al. 2023

J of Oral Rehabilitation

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BackgroundThe assessment of masticatory performance (MP) is conducted in hospitals, but is difficult to perform in nursing facilities that lack specialists in dysphagia. To select the appropriate food textures in nursing practice, a simple method of evaluating the MP should be developed.ObjectiveThe purpose of this study was to investigate motion parameters that influence MP by motion capture analysis of maxillofacial movement on chewing gummy jelly in healthy adults.MethodsThe subjects were 50 healthy adults. The state of chewing gummy jelly was photographed using a high‐speed camera. Simultaneously, we evaluated the amount of glucose extracted (AGE) obtained with gummy jelly as a reference value for MP. The subjects were divided into two groups: normal and low masticatory groups (NG and LG, respectively) based on the AGE. The cycle of mastication was classified into three phases: closing phase (CP), transition phase (TP) and opening phase (OP) through motion capture analysis of the video photographed. Parameters of jaw movement and their associations with the AGE were examined.ResultsThe transition phase rate (TR) and opening phase rate (OR) were correlated with the AGE. Furthermore, the TR in the NG was significantly higher than in the LG, whereas the OR was significantly lower than in the LG. The age, TR and opening velocity were significant independent variables.ConclusionMotion capture technology facilitated the analysis of jaw movement. The results suggested that MP can be evaluated by analysing the TP and OP rates.

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Efficiency of Closed Mastication of Gummy Evaluated with Gnatho-hexagraph

Cited by 2 publications

References 9 publications

Skeletal Anterior Open Bite Attenuates the Chewing-Related Increase in Brain Blood Flow

Skeletal Anterior Open Bite Attenuates the Chewing-Related Increase in Brain Blood Flow

Evaluation of masticatory performance by motion capture analysis of jaw movement

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