Association between masticatory performance using a colour-changeable chewing gum and jaw movement

Abstract

The purpose of this study was to investigate the relationship between masticatory performance as determined using a colour-changeable chewing gum and mandibular movements. Subjects comprised 45 fully dentate adults (23 men, 22 women; mean age, 28·1 years). The gum was chewed for a specified number of chewing strokes (20, 40, 60, 80, 120 or 160 strokes) without any instructions as to chewing side. A colourimeter was used to measure L*, a* and b* values (CIE-L*a*b* colour system) for the chewed gum, then the difference between two colours in the CIE-L*a*b* colour space (ΔE) for each number of chewing strokes was calculated according to a formula. Index of masticatory performance (ΔE60) for each subject was obtained using ΔE for 20, 40, 60, 80, 120 and 160 strokes. Mandibular movements were recorded using an opto-electric system with six degrees of freedom. Twelve parameters of mandibular movements relating to amplitude, duration, velocity and angle were computed for each cycle, and mean values for 10 cycles (from cycle 11 to 20) were calculated separately. Stepwise multiple regression analysis identified maximum closing velocity and closing angle as predictors accounting for 18% of the variation in ΔE60. These results suggest that lower angles of approach to intercuspation and faster speed during closing duration are associated with colour changes in the colour-changeable chewing gum.

Estudo das variáveis cinemáticas da mastigação unilateral e habitual de indivíduos saudáveis

“…Corroborating these results, previous studies have shown positive correlation between mandibular movement velocity and chewing performance (15,16) . This fact suggests that higher velocity during the closing phase of the masticatory cycle transmits a greater amount of energy to the food bolus, consequently allowing more efficient crushing.…”

“…Mandibular movement variables have been associated with masticatory performance. Better masticatory performance has been related to greater vertical mandibular range of motion, higher closing velocity, and shorter duration of the masticatory cycle closing phase (15,16) . The study of the behavior of the kinematic variables of deliberate unilateral and habitual mastication in healthy individuals can contribute to the understanding of the possible impact of the pattern adopted on masticatory performance in cases of disorders that interfere with the chewing function, such as TMD, oral breathing, and occlusal alterations.…”

Correlation Between Masticatory Performance and Quality of Life of Patients Using Posterior Dental Implants

“…With the progression of chewing, the color of the chewing gum turns from yellowish-green to red because the yellow and blue dyes seep into saliva, and the red dye appears as a result of elution of the citric acid [12,14]. The gum initially had a greenish color and became more-and-more reddish with the duration and intensity of chewing, and there is a strong correlation between color change and masticatory performance and ability.…”

“…This method is easy, simple, and quick, with no need for bulky equipment, and it has advantages in stimulating a natural and stable act of chewing while still allowing complete recovery of the test item. Color-changeable chewing gum has been applied in various fields [12].…”

<i>Overdentures </i>mandibulares retidas por mini-implantes ou implantes convecionais: avaliação da função mastigatória e colonização microbiana

“…Este método envolve a determinação da performance mastigatória pela avaliação da alteração de cor da goma de mascar após o teste (Komagamine et al, 2011;Komagamine et al, 2012;Hama et al, 2014aHama et al, , 2014b. O método é considerado simples, efetivo, rápido, além de apresentar correlação positiva com o método que utiliza as peneiras granulométricas (Hama et al, 2014a).…”