Language：English   Publishing type：Research paper (scientific journal)  

OBJECTIVE: This study aimed to determine changes in saliva secretion and subjective taste intensity during a sustained period with continuous gustatory stimulation. DESIGN: Twenty-two healthy adults participated in this study. The selected taste solutions were aspartame, sucralose, and acesulfame potassium, which are nonnutritive sweeteners. The concentrations of sucralose1 and acesulfame potassium were set to show the same sweetness intensity as aspartame. Sucralose2 was twice the concentration of sucralose1. The solution was continuously fed into the oral cavity at a flow rate of 0.04 mL / min through a neck-worn precise infusion system. The salivary flow rate (g/min) after 10 min of intraoral water supply from the device was used as the baseline. Salivary flow rate, subjective taste intensity evaluated by the visual analog scale (VAS), and salivary flow rate relative to the baseline were recorded at 10, 30, 60, and 120 min after the start of the test. RESULTS: In the aspartame, sucralose1, and sucralose2 groups, the salivary flow rate increased significantly from 10 min to 120 min after the start of the test when compared to the rate at baseline (p < 0.05). The relative salivary flow rate increased and the VAS value decreased significantly over time and were affected by the time factor (p < 0.001, p = 0.013, respectively) but not by the sweetener-group factor and the interaction effects. CONCLUSIONS: Continuous gustatory stimulation may maintain increased salivary production for a sustained period.

DOI： 10.1016/j.archoralbio.2022.105590

PubMed

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Language：Japanese   Publisher：岡山医学会  

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Language：Japanese   Publisher：岡山歯学会  

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Language：English   Publishing type：Research paper (scientific journal)  

PURPOSE: To examine how particle loss affects the evaluation of masticatory ability using the image analysis method. METHODS: The subjects were divided into two groups:Y-group (healthy young adults: 10 male, 10 female; mean age 27.6 ± 1.9 years), and D-group (denture wearing older adults: 13 male, 9 female; mean age, 75.1 ± 5.3 years). Raw carrots, peanuts, and a combined test food from 5 daily food materials (mixed foods) were selected as test foods. Images of the boluses were captured and processed after the subjects freely masticated the test foods until the point of swallowing or completed half strokes of total chewing cycles. The median particle size (X50) was calculated from the data for each particle. We compared X50 calculated from all particles obtained from the masticatory bolus (as X50N) with the X50 of only selectively larger particles (as X50R). RESULTS: Significant correlations were observed between X50N and X50R (p < 0.01) determined in almost all masticatory conditions. In particular, for particle sizes of 2 mm or more, the correlation coefficient between X50N and X50R was notably strong (r > 0.75). CONCLUSION: The method of analyzing only larger particles makes it possible to evaluate masticatory ability without losing the characteristics of the original particle size distribution of the entire bolus. This finding can be applied for the evaluation of masticatory ability, especially among older adults who have difficulty retrieving the total amount of test food due to decreased activities of daily living.

DOI： 10.2186/jpr.JPR_D_21_00069

PubMed

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：ELSEVIER IRELAND LTD  

PURPOSE: This study aimed to investigate the effect of removable denture prostheses on the comminution progress in elderly people. METHODS: Twenty-two denture wearers of Eichner's classification B and C (75.1±5.3 years old) and 20 young fully dentate subjects (27.6±1.9 years old) participated in the masticatory examination, which used a combined test food from 5 daily food materials. Full masticatory cycles lasting until subjects needed to swallow and the half number of the cycles were adopted as masticatory conditions. Digital images of food particles under wet conditions were obtained for each bolus, and particles were analyzed by calculating the homogeneity and particle size indices. RESULTS: The characteristic properties of the food particles were observed using a homogeneity index in the elderly denture group for half masticatory strokes. Their homogeneity index was significantly higher than that of the young dentate group. By contrast, no significant difference was observed in the indices for particles immediately before swallowing between two groups. CONCLUSIONS: The comminuted particle size before swallowing in healthy denture wearers was not significantly different from that in the natural dentate group. The comminution of the first-half process in denture wearers was typical and could be one possible focus for meal property specifications in future studies.

DOI： 10.1016/j.jpor.2019.08.001

Web of Science

PubMed

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Total pages：196p   Language：Japanese

CiNii Books

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J-GLOBAL

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Language：Japanese   Publisher：(公社)日本補綴歯科学会  

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Language：Japanese   Publisher：医歯薬出版(株)  

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Other Link： https://search-tp.jamas.or.jp/index.php?module=Default&action=Link&pub_year=2022&ichushi_jid=J00564&link_issn=&doc_id=20220301230013&doc_link_id=%2Faa7shitm%2F2022%2F013903%2F013%2F0604b0610%26dl%3D3&url=https%3A%2F%2Fwww.medicalonline.jp%2Fjamas.php%3FGoodsID%3D%2Faa7shitm%2F2022%2F013903%2F013%2F0604b0610%26dl%3D3&type=MedicalOnline&icon=https%3A%2F%2Fjk04.jamas.or.jp%2Ficon%2F00004_4.gif

J-GLOBAL

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J-GLOBAL

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Event date： 2023.10.28

Language：Japanese   Presentation type：Poster presentation  

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Event date： 2022.10.7 - 2022.10.9

Language：Japanese   Presentation type：Public lecture, seminar, tutorial, course, or other speech  

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Event date： 2022.8.27 - 2022.8.28

Presentation type：Oral presentation (general)  

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Event date： 2021.12.4 - 2021.12.5

Presentation type：Oral presentation (general)  

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Event date： 2021.2.19 - 2021.2.27

Language：English   Presentation type：Poster presentation  

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