Occlusal Forces and Mandibular Movements

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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Fundamentals in the Reproduction of Mandibular Movements in Edentulous Mouths**Read before the Section on Full Denture Prosthesis at the Seventh International Dental Congress, Philadelphia, Pa., Aug. 23, 1926.

The Journal of the American Dental Association (1922) ◽

10.14219/jada.archive.1927.0077 ◽

1927 ◽

Vol 14 (3) ◽

pp. 409-415

Author(s):

George P. Phillips

Keyword(s):

Mandibular Movements

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Molar occlusion and mandibular movements during occlusion in the American opossum, Didelphis marsupialis L.

Zoological Journal of the Linnean Society ◽

10.1111/j.1096-3642.1970.tb00728.x ◽

1970 ◽

Vol 49 (1) ◽

pp. 21-47 ◽

Cited By ~ 148

Author(s):

A. W. CROMPTON ◽

KAREN HIIEMAE

Keyword(s):

American Opossum ◽

Mandibular Movements

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Influence of fibromucosa height and loading on the stress distribution of a total prosthesis: a finite element analysis

Brazilian Dental Science ◽

10.14295/bds.2021.v24i2.2144 ◽

2021 ◽

Vol 24 (2) ◽

Author(s):

Tarcisio José de Arruda Paes Junior ◽

João Paulo Mendes Tribst ◽

Amanda Maria de Oliveira Dal Piva ◽

Viviane Maria Gonçalves de Figueiredo ◽

Alexandre Luiz Souto Borges ◽

...

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Stress Distribution ◽

Cortical Bone ◽

Principal Stress ◽

Maximum Principal Stress ◽

Element Analysis ◽

Total Displacement ◽

Anterior Guidance ◽

Mandibular Movements

Purpose: To evaluate the effect of fibromucosa height on the stress distribution and displacement of mandibular total prostheses during posterior unilateral load, posterior bilateral load and anterior guidance using the finite element analysis (FEA). Material and methods: 3D virtual models were made to simulate the stress generated during different mandibular movements in a total prosthesis. The contacts were simulated according to the physiology, being considered perfectly bonded between cortical and medullar bones; and between cortical bone and mucosa. Non-linear frictional contact was used for the total prosthesis base and fibromucosa, allowing the prosthesis to slide over the tissue. The cortical bone base was fixed and the 100 N load was applied as unilateral load, posterior bilateral load and anterior guidance simulation. The required results were for maximum principal stress (MPa), microstrain (mm/mm) and total displacement (mm). The numerical results were converted into colorimetric maps and arranged according to corresponding scales. Results: The stress generated in all situations was directly proportional to the fibromucosa height. The maximum principal stress results demonstrated greater magnitude for anterior guidance, posterior unilateral and posterior bilateral, respectively. Only posterior unilateral load demonstrated an increase in bone microstrain, regardless of the fibromucosa height. Prosthesis displacement was lower under posterior bilateral loading. Conclusion: Posterior bilateral loading is indicated for total prosthesis because it allows lower prosthesis displacement, lower stress concentration at the base of the prosthesis and less bone microstrain. Keywords Finite element analysis; Occlusion; Total prosthesis.

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