講演情報
[P-086]Photographic image analysis of individual gummy particles for evaluating masticatory performance
○Khaing Aye Mya Mya1、Murakami Kazuhiro1、Takano Hinako1、Hori Kazuhiro1 (1. Division of Comprehensive Prosthodontics, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Niigata.)
【Purpose】 We have developed a photographic image analysis method that anyone can easily and objectively evaluate masticatory performance (MP) using gummy jelly and smartphone. With this method, it is also possible to analyze the individual chewed gummy particles in detail. The purpose of this study was to identify the relationship between the features of individual gummy particle and oral functions.
【Material and methods】 This study investigated 165 participants aged 60 years or older (61 males, 104 females; mean age 76.6±6.9 years) who visited our clinic for dental maintenance. Seven oral function tests for oral hypofunction were performed. In the masticatory performance test, participants were instructed to chew 5.5g of gummy jelly 30 times and then spit it out. The gummy particles were spread into a dedicated box with 30ml of water, and MP as the increased surface area of gummy jelly was analyzed by taking a photo by a smartphone. MP and the diameter of the largest gummy particle in the bolus (Dmax) were also analyzed. The participants were divided into two groups: those with MP > 1500mm2 : Normal MP group, and those with a score of <=1500mm2: Low MP group. Normal MP group was further divided into two groups based on the median of Dmax: Large Dmax group and Small Dmax group. One-way ANOVA and post-hoc test with Bonferroni correction was used to compare oral functions among the three groups. Additionally, Normal MP group was divided into four groups based on the quartiles of Dmax. The proportion of participants with low maximum occlusal force (MOF) (<500N) among four quartile groups and Low MP group was compared using Chi-square test.
【Results and Discussion】 In comparison of oral functions, significant differences were found in MOF among the three groups. In the proportion of participants with low MOF, a significantly higher proportion (73.3%) with low MOF was observed in Low MP group. In Normal MP group, the proportion of participants with low MOF increased as the Dmax size increased, though there was no significant difference. From these findings, oral functions including MOF suggested the association with not only MP but also the features of individual gummy particle such as the largest gummy particle size.
（COI disclosure: none）
（新潟大学 倫理審査委員会承認番号 2023-0199）
【Material and methods】 This study investigated 165 participants aged 60 years or older (61 males, 104 females; mean age 76.6±6.9 years) who visited our clinic for dental maintenance. Seven oral function tests for oral hypofunction were performed. In the masticatory performance test, participants were instructed to chew 5.5g of gummy jelly 30 times and then spit it out. The gummy particles were spread into a dedicated box with 30ml of water, and MP as the increased surface area of gummy jelly was analyzed by taking a photo by a smartphone. MP and the diameter of the largest gummy particle in the bolus (Dmax) were also analyzed. The participants were divided into two groups: those with MP > 1500mm2 : Normal MP group, and those with a score of <=1500mm2: Low MP group. Normal MP group was further divided into two groups based on the median of Dmax: Large Dmax group and Small Dmax group. One-way ANOVA and post-hoc test with Bonferroni correction was used to compare oral functions among the three groups. Additionally, Normal MP group was divided into four groups based on the quartiles of Dmax. The proportion of participants with low maximum occlusal force (MOF) (<500N) among four quartile groups and Low MP group was compared using Chi-square test.
【Results and Discussion】 In comparison of oral functions, significant differences were found in MOF among the three groups. In the proportion of participants with low MOF, a significantly higher proportion (73.3%) with low MOF was observed in Low MP group. In Normal MP group, the proportion of participants with low MOF increased as the Dmax size increased, though there was no significant difference. From these findings, oral functions including MOF suggested the association with not only MP but also the features of individual gummy particle such as the largest gummy particle size.
（COI disclosure: none）
（新潟大学 倫理審査委員会承認番号 2023-0199）