Correlation between 3-dimensional facial morphology and mandibular movement during maximum mouth opening and closing

2010 ◽  
Vol 110 (5) ◽  
pp. 648-656 ◽  
Author(s):  
Dae-Seung Kim ◽  
Soon-Chul Choi ◽  
Sam-Sun Lee ◽  
Min-Suk Heo ◽  
Kyung-Hoe Huh ◽  
...  
Keyword(s):  
Mouth Opening ◽  
Facial Morphology ◽  
Mandibular Movement ◽  
3 Dimensional ◽  
Opening And Closing

scholarly journals A New Tridimensional Insight into Geometric and Kinematic Characteristics of Masticatory Cycles in Participants with Normal Occlusion

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Ramón Fuentes ◽  
Alain Arias ◽  
María Florencia Lezcano ◽  
Diego Saravia ◽  
Gisaku Kuramochi ◽  
...  
Keyword(s):  
Mouth Opening ◽  
Mandibular Movement ◽  
Electromagnetic Articulography ◽  
Kinematic Characteristics ◽  
Normal Occlusion ◽  
Significant Difference ◽  
Number Of Cycles ◽  
Opening And Closing ◽  
Mandibular Movements ◽  
Insight Into

The aim of this study was to analyze the general, geometric, and kinematic characteristics of the masticatory cycle’s movements in a tridimensional way, using a method developed by our study group to provide a new insight into the analysis of mandibular movements due to advancement in the potential of computational analysis. Ten individuals (20.1 ± 2.69 years), molar class I, without mandibular movement problems participated in this study. The movements of the masticatory cycles, frontal and sagittal mandibular border movements, were recorded using 3D electromagnetic articulography and processed with computational scripts developed by our research group. The number of chewing cycles, frequency (cycles/s), chewing cycle areas/mandibular border movements areas ratios, and the mouth opening and closing speeds on the 3D trajectory of the chewing cycle were compared. The cycles were divided and analyzed in thirds. The masticatory cycles showed high variation among the individuals (21.6 ± 9.4 cycles); the frequency (1.46 ± 0.21 cycles/s) revealed a moderate positive correlation (R = 0.52) with the number of cycles. The frontal area ratios between the cycle area and the mandibular border movement presented higher values in the first third (6.65%) of the masticatory cycles, and the ratios of sagittal areas were higher and more variable (first, 7.67%; second, 8.06%; and third, 10.04%) than the frontal view. The opening and closing mouth speeds were greater in the second third of the masticatory cycles (OS, 57.82 mm/s; CS, 58.34 mm/s) without a significant difference between the opening and closing movements when the same thirds were evaluated. Further studies are necessary to improve the understanding of the masticatory cycles regarding the standardization of parameters and their values.

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

2004 ◽  
Vol 12 (1) ◽  
pp. 39-44 ◽  
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.

Use of 3-dimensional surface acquisition to study facial morphology in 5 populations

2010 ◽  
Vol 137 (4) ◽  
pp. S56.e1-S56.e9 ◽  
Author(s):  
Chung How Kau ◽  
Stephen Richmond ◽  
Alexei Zhurov ◽  
Maja Ovsenik ◽  
Wael Tawfik ◽  
...  
Keyword(s):  
Facial Morphology ◽  
3 Dimensional ◽  
Dimensional Surface

scholarly journals Validating an infrared thermal switch as a novel access technology

2021 ◽  
Author(s):  
Negar Memarian ◽  
Anastasios Venetsanopoulos ◽  
Tom Chau
Keyword(s):  
Gold Standard ◽  
Mouth Opening ◽  
User Performance ◽  
Access Technology ◽  
Thermal Switch ◽  
Qualitative Feedback ◽  
Multiple Trials ◽  
Audiovisual Stimuli ◽  
Surrounding Areas ◽  
Opening And Closing

Background Recently, a novel single-switch access technology based on infrared thermography was proposed. The technology exploits the temperature differences between the inside and surrounding areas of the mouth as a switch trigger, thereby allowing voluntary switch activation upon mouth opening. However, for this technology to be clinically viable, it must be validated against a gold standard switch, such as a chin switch, that taps into the same voluntary motion. Methods In this study, we report an experiment designed to gauge the concurrent validity of the infrared thermal switch. Ten able-bodied adults participated in a series of 3 test sessions where they simultaneously used both an infrared thermal and conventional chin switch to perform multiple trials of a number identification task with visual, auditory and audiovisual stimuli. Participants also provided qualitative feedback about switch use. User performance with the two switches was quantified using an efficiency measure based on mutual information. Results User performance (p = 0.16) and response time (p = 0.25) with the infrared thermal switch were comparable to those of the gold standard. Users reported preference for the infrared thermal switch given its non-contact nature and robustness to changes in user posture. Conclusions Thermal infrared access technology appears to be a valid single switch alternative for individuals with disabilities who retain voluntary mouth opening and closing.

scholarly journals Late removal of an upper third molar displaced into the infratemporal space using an intermaxillary fixation screw: a case report

2020 ◽  
Vol 9 (11) ◽  
pp. e129119457
Author(s):  
Eduardo Dallazen ◽  
Vinícius Almeida Carvalho ◽  
Eduardo Hochuli-Vieira ◽  
Cristian Statkievcz ◽  
Cecília Luiz Pereira-Stabile ◽  
...  
Keyword(s):  
Surgical Techniques ◽  
Third Molar ◽  
Mouth Opening ◽  
Mandibular Movement ◽  
Intermaxillary Fixation ◽  
Temporal Space ◽  
Intraoral Approach ◽  
Computer Tomography Scan ◽  
Patient Reported ◽  
Fixation Screw

Teeth displacement during extractions even tough rare are extremely unwanted, especially for infra temporal space. This accident generally necessitate additional treatment for their resolution, being either immediate or late. Several authors discribed surgical techniques for removal displaced teeth into the infratemporal space, varying according to the degree of displacement, being that in some of this cases, is necessary the utilization of complementary tools. This case describes the technique utilized for late removal of tooth 18 (upper right third molar) dislocated into the lower portion of the infratemporal space (confirmed by the Cone Bean Computer tomography Scan), exam was performed after the patient reported pain in the operated region and during mandibular movement too, with an interincisal opening maximum of 20 millimeters. The procedure was realized under local anesthesia by a conservative intraoral approach and aid of intermaxillary fixation screw to facilitate extraction. The patient recovered well, without complications, with remission of pain and restoration of mouth opening.

scholarly journals Surgical Reduction of Symphysis Fracture and Spontaneous Repositioning of the Mandibular Condyle: A Case Report

2021 ◽  
Vol 1 (3) ◽  
Author(s):  
Claudemir de Carvalho
Keyword(s):  
Physical Examination ◽  
Maxillofacial Surgery ◽  
Mandibular Condyle ◽  
Mouth Opening ◽  
Dental Occlusion ◽  
Glenoid Cavity ◽  
Mandibular Movement ◽  
Mandibular Symphysis ◽  
Surgical Reduction ◽  
Condyle Fracture

The condylar process is a more fragile area, which is usually fractured by indirect trauma. The objective of this study is to report the case of a 10-year-old patient who presented to the Maxillofacial Surgery and Traumatology Service of the Regional Hospital of Vale do Paraíba, in Taubaté-SP, Brazil. Physical examination revealed limited mandibular movement with painful symptoms, crossbite, and upper incisor avulsion. A face tomography showed a fracture of the mandibular symphysis (right side) and a fracture of the left condyle. Surgical reduction of the mandibular symphysis fracture was performed. After exposure and reduction of bone segments, maxillomandibular block, rigid internal fixation and conservative treatment for condyle fracture were performed. A soft liquid diet and weekly outpatient follow-up was adopted for the first two months. After 15 days of surgery, the patient had mild edema, slight limitation in mouth opening, sutures without dehiscence and without signs of infection. In the first control tomography, the treated fracture was adequately reduced and the fractured condyle remained with medial displacement in the glenoid cavity. After one year, on physical examination, the patient presented satisfactory dental occlusion, preserved mandibular movements and no signs of nerve damage. The tomography showed the fracture consolidated, and the left mandibular condyle well positioned in the glenoid cavity. After two years, the third tomography was performed, showing remodelling of the left mandibular condyle.

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