The effect of mandibular movements and EMG during mastication on masticatory ability

The aim of this study was to assess oral health related quality of life (OHRQoL) of patients before, during and after completion of implant-supported full-arch immediate loading rehabilitation according to the Columbus Bridge Protocol (CBP). 25 patients with compromised dentition were rehabilitated according to the CBP and were assessed for OHRQoL using 4 questionnaires specifically realized for this study and inspired to the OHIP (Oral Health Impact Profile) questionnaire. Patients assessed themselves before surgery, during the healing period (1 week and 2 months after surgery) and after definitive prosthodontic treatment (4 months after surgery). The questionnaires specifically investigated patients’ pain, confort, home oral hygiene habits, satisfaction related to esthetics, masticatory ability, phonetics and general satisfaction toward the treatment.Patients reported an improvement of OHRQoL after full-arch immediate loading rehabilitation. A statistically significant improvement in aesthetic and chewing ability was found. After 4 months 92% of the patients did not feel tense with their smile, 96% did not show problems to relate with other people or smiling, 92% did not show difficulty to eat some foods. Phonetics was found to be a critical issue, especially in the intermediate phase of healing. One week after surgery the percentage of patients who was very satisfied with phonetics slightly decreased from 48% to 36%. The assessment of patients' OHRQoL related to full-arch immediate loading implant therapy exhibited a significant improvement of their quality of life. The questionnaires herein presented could be an effective tool to evaluate patients' reaction to oral rehabilitation.

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Effect of isometric exercises on the masseter muscle in older adults with missing dentition: a randomized controlled trial

Scientific Reports ◽

10.1038/s41598-021-86807-w ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Satoru Takano ◽

Kohei Yamaguchi ◽

Kazuharu Nakagawa ◽

Kanako Yoshimi ◽

Ayako Nakane ◽

...

Keyword(s):

Older Adults ◽

Masseter Muscle ◽

Controlled Trial ◽

Intervention Group ◽

Muscle Thickness ◽

Control Group ◽

Older Individuals ◽

Muscle Properties ◽

Oral Function ◽

Masticatory Ability

AbstractMaintaining oral function in older individuals with missing teeth is important for leading a healthy and independent life. This study aimed to evaluate whether simple isometric exercises can maintain and improve the oral function [maximum occlusal force (MOF) and masticatory ability (MA)] and the masticatory muscle properties [masseter muscle thickness (MMT) and echo intensity (MMEI)] in older adults during the maintenance phase of removable prosthetic treatment. Participants were randomly categorized into the intervention and control groups. The mouthpieces were distributed, and participants were instructed to use them for exercising. The intervention group was instructed to perform maximum clenching for 10 s, whereas the control group was instructed to tap the teeth at an arbitrary speed for 10 s. Both were repeated five times at an interval of 5 s between each activity and twice daily for 4 weeks. The outcomes were measured after a month of exercise. The intervention group showed a significant improvement in the MOF, MMT during contraction, MMT at rest and MMEI during contraction. There were no significant differences in the MA and MMEI at rest. In the control group, no improvement was observed in any of the parameters. When the isometric exercises were performed using a mouthpiece, there was an improvement in the oral function and masseter muscle properties in older individuals with Eichner B status who used dentures.

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Association between denture use, chewing ability, and all-cause mortality in middle-aged and older adults who exercised regularly in Korea

Scientific Reports ◽

10.1038/s41598-021-85440-x ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Jong-Hwa Jang ◽

Ji-Liang Kim ◽

Jae-Hyun Kim

Keyword(s):

Oral Health ◽

Mortality Rate ◽

Significant Risk ◽

Subjective Health ◽

Middle Aged ◽

Masticatory Ability ◽

Chewing Ability ◽

All Cause Mortality ◽

Using Data ◽

Middle Aged Adults

AbstractHerein, using data from the Korean Longitudinal Study of Aging (2006–2018), we evaluated denture use and chewing ability to determine the status of oral health in middle-aged adults who exercised regularly; further, we investigated the relationship of oral health with all-cause mortality. From the basic survey conducted in 2006, we interviewed 10,254 participants who were followed up until death. The participants were grouped based on regular exercise into REG (n = 3921) and non-REG (n = 6290) groups. The mortality rate was higher in the non-REG group than in the REG group (35.8% versus 26.9%; p < 0.001). The mortality rate was higher in denture users (versus non-denture users), non-drinkers (versus alcohol drinkers), and those on medical aid (versus national health insurance). The mortality rate was higher in participants with poor masticatory ability, lower education level, and poor subjective health perception (p < 0.001). Denture use and masticatory discomfort were not significant risk factors for mortality in the non-REG group (p > 0.05). In conclusion, masticatory discomfort was a risk factor for increased mortality in middle-aged Korean adults who exercised regularly, at least once a week. Thus, assessment of masticatory ability could be a useful indicator of life expectancy in middle-aged adults.

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Mathematical interpretation of mandibular movements

Journal of Prosthetic Dentistry ◽

10.1016/0022-3913(58)90110-0 ◽

1958 ◽

Vol 8 (5) ◽

pp. 887-892 ◽

Cited By ~ 5

Author(s):

Honorato A. Villa

Keyword(s):

Mandibular Movements ◽

Mathematical Interpretation

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A new, simple and accurate method for evaluating masticatory ability

Journal of Oral Rehabilitation ◽

10.1111/j.1365-2842.1989.tb01353.x ◽

1989 ◽

Vol 16 (4) ◽

pp. 373-380 ◽

Cited By ~ 32

Author(s):

A. NAKASIMA ◽

K. HIGASHI ◽

M. ICHINOSE

Keyword(s):

Accurate Method ◽

Masticatory Ability

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Evaluation of a self-assessed screening test for masticatory ability of Taiwanese older adults

Gerodontology ◽

10.1111/j.1741-2358.2012.00632.x ◽

2012 ◽

Vol 29 (2) ◽

pp. e1113-e1120 ◽

Cited By ~ 5

Author(s):

Kun-Jung Hsu ◽

Huey-Er Lee ◽

Shou-Jen Lan ◽

Shun-Te Huang ◽

Chun-Min Chen ◽

...

Keyword(s):

Older Adults ◽

Screening Test ◽

Masticatory Ability

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The result of instrumental analysis of the amount of motion in patients with different occlusive and skeletal classes according to the condylography

Medical alphabet ◽

10.33667/2078-5631-2021-38-8-13 ◽

2021 ◽

Vol 1 (38) ◽

pp. 8-13

Author(s):

M. G. Soykher ◽

A. V. Lepilin ◽

M. I. Soykher ◽

I. K. Pisarenko ◽

G. T. Saleeva ◽

...

Keyword(s):

Complex Formation ◽

Temporomandibular Joint ◽

Temporal Bone ◽

Qualitative And Quantitative ◽

Lower Jaw ◽

Individual Function ◽

Mandibular Fossa ◽

Quantitative Characteristics ◽

Mandibular Movements ◽

Qualitative And Quantitative Characteristics

The temporomandibular joint is paired, a complex formation of an ellipsoid shape, which is formed by the articular head of the lower jaw, the mandibular fossa and the articular tubercle of the temporal bone, covered with fibrous cartilage. There are two types of movements in the temporomandibular joint: translation and rotation, which implement protrusion-retrusion, right and left mediotrusion, and opening-closing. Computerized axiography is used for assessment of the mandibular movements and the patient’s skeletal parameters. This type of examination allows you to adjust the articulator for an individual function and to study the qualitative and quantitative characteristics of the temporomandibular joint.

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Mandibular movements in children with and without signs and symptoms of temporomandibular disorders

Journal of Applied Oral Science ◽

10.1590/s1678-77572004000100008 ◽

2004 ◽

Vol 12 (1) ◽

pp. 39-44 ◽

Cited By ~ 17

Author(s):

Leonardo Rigoldi Bonjardim ◽

Maria Beatriz Duarte Gavião ◽

Luciano José Pereira ◽

Paula Midori Castelo

Keyword(s):

Clinical Signs ◽

Mouth Opening ◽

Signs And Symptoms ◽

Lateral Movement ◽

Mandibular Movement ◽

Group I ◽

Group Ii ◽

The Right ◽

Mandibular Movements ◽

Digital Caliper

This research aimed to evaluate mandibular movements in children with and without signs and symptoms of temporomandibular dysfunction. The sample taken consisted of 99 children aged 3 to 5 years distributed in two groups: I - Absence of signs and/or symptoms of TMD (25 girls/40 boys); II - Presence of signs and symptoms of TMD (16 girls/18 boys). The symptoms were evaluated through an anamnesis questionnaire answered by the child's parents/caretakers. The clinical signs were evaluated through intra- and extraoral examination. Maximum mouth opening and left/right lateral movements were measured using a digital caliper. The maximum protrusive movement was measured using a millimeter ruler. The means and standard deviations for maximum mouth opening in Group I and Group II were 40.82mm±4.18 and 40.46mm±6.66, respectively. The values found for the left lateral movement were 6.96mm±1.66 for Group I and 6.74mm±1.55 for Group II, while for the right lateral movement they were 6.46mm±1.53 and 6.74mm±1.77. The maximum protrusion movements were 5.67mm±1.76 and 6.12mm±1.92, in Groups I and II, respectively. The mandibular movement ranges neither differed statistically between groups nor between genders. FAPESP Process 96/0714-6.

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Effect of dental wear, stabilization appliance and anterior tooth reconstruction on mandibular movements during speech

Brazilian Dental Journal ◽

10.1590/s0103-64402008000200012 ◽

2008 ◽

Vol 19 (2) ◽

pp. 151-158 ◽

Cited By ~ 1

Author(s):

Priscila de Oliveira Serrano ◽

Fernanda Faot ◽

Altair Antoninha Del Bel Cury ◽

Renata Cunha Matheus Rodrigues Garcia

Keyword(s):

Tooth Wear ◽

Anterior Tooth ◽

Control Group ◽

Dental Wear ◽

Jaw Opening ◽

Before And After ◽

Left And Right ◽

The Right ◽

Tracking Device ◽

Mandibular Movements

This study described changes in mandibular movements during pronunciation of /m/ and /s/ sounds in Portuguese, in patients presenting dental wear before and after appliance insertion and tooth reconstruction. Subjects were divided into a control group of dentate patients and an experimental group of patients with incisal tooth wear due to bruxism. A magnetic jaw tracking device measured the jaw opening, and translations to left and right sides of the mandible during pronunciation of phonemes. Evaluations were carried out 1 week and immediately before appliance insertion; 24 h, 7, 30 and 60 days after appliance insertion; and 1 week and 1 month after tooth reconstruction. Data were submitted to two-way ANOVA, Mann-Whitney and Friedman tests (p<0.05). Jaw opening was different (p<0.05) for both sounds in all periods. The anteroposterior amplitude for /s/ showed differences immediately before and 1 month after appliance insertion (p<0.05). Lateral amplitude for the right side showed differences between groups after appliance insertion for /s/, and 1 and 2 months after appliance insertion for the /m/ (p<0.05). Volunteers with anterior tooth wear had a wider opening movement, and the movements during speech of /m/ and /s/ sounds were not changed after appliance insertion and reconstruction of teeth.

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