Effect of hyposalivation on mastication and mandibular movements during speech

Abstract

The aim of this study was to evaluate whether patients with hyposalivation present damaged mastication or mandibular movements during speech. Forty subjects composed 2 groups: control and hyposalivation. Masticatory performance was assessed with a silicon-based artificial material and a 10-sieve method. Mandibular movements during speech were observed with a 3D jaw-tracking device. Data were analyzed with Student's t-test or the Mann-Whitney method (P < 0.05). The masticatory performance (mm) of control and hyposalivation were 4.40 ± 0.62 and 4.74 ± 1.34, respectively. Outcomes for speech movements (mm) were as follows: maximum vertical opening amplitude (10.8 ± 4.2; 9.9 ± 2.7) and displacements to the right (1.0 ± 0.8; 0.5 ± 0.6), left (1.8 ± 1.4; 2.3 ± 1.2), or anterior-posterior (2.8 ± 1.1; 2.9 ± 1.0) for control and hyposalivation, respectively. No statistical difference was found between groups for any variable. The results indicated that hyposalivation did not affect masticatory performance or mandibular movements during speech. ClinicalTrials.gov Identifier: NCT01020084.

Reproducibility of a silicone-based test food to masticatory performance evaluation by different sieve methods

“…Each participant was instructed to chew a portion of 17 cubes (3.4 g) in a habitual manner. 13 Although most patients are not familiar with the test food or details of proper test execution, participants received no pre-test training to enable assessment of the true reproducibility of results. No feedback control was used to avoid disequilibrium in the conscious/unconscious nature of the masticatory process and consequent oscillations in bite force and chewing rate.…”

“…11 The use of natural test foods, such as oilseed, has been discontinued due to their high solubility during mastication, instability over time, and difficulty of homogenizing their fracture forces and deformation throughout their structures. 11 The Optosil ® (Heraeus Kulzer, Hanau, Germany) family of artificial (polydimethylsiloxane) test foods is considered to be suitable, 1,2,4,5,6,9,10,11,12,13,14,15 as it has produced results with validated correlations with other masticatory factors, such as the number of occlusal pairs and bite force. 3,4,5,6 However, few studies have properly evaluated the reproducibility of results obtained with Optosil ® products [Optosil ® 1980, 9,12 Optosil P Plus ® , 4 and Optosil Comfort ®13,14,15 (OC)].…”

“…3,4,5,6 However, few studies have properly evaluated the reproducibility of results obtained with Optosil ® products [Optosil ® 1980, 9,12 Optosil P Plus ® , 4 and Optosil Comfort ®13,14,15 (OC)]. Interestingly, the use of 5.6-mm Optosil ® cubes 4,9,12 yielded a lower X 50 value than that obtained with OC 13,14,15 in dentate subjects. Moreover, studies of OC have been conducted with larger samples than have those of previous versions of this material.…”

Queixas fonoaudiológicas e verificação da fala de indivíduos com diagnóstico de ardência bucal e xerostomia

“…It seems important to highlight that in this analysis, even though various oral structures were said to be affected with burning sensation and dry mouth, only one subject in G1 reported to "stop talking" in order to alleviate the burning sensation; this strategy was not mentioned in G2. This datum may suggest that the burning sensation and/or dry mouth, in spite of subjects' complaints, do not interfere in their communication (26,30) .…”

“…Complaints referring to xerostomia are usuallly identified by means of questionnaires (15)(16)(17)19,23,25) . Some studies try to investigate objectively the impairment of the oral functions related to dry mouth and/or hyposalivation (17,28) ; however, few studies have reported the association of this symptom and speech (29,30) .…”