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.

(Preprint)

2018 ◽  
Author(s):  
Dr Malathi Dayalan ◽  
Dr Sudeshna Sharma ◽  
Dr Shweta Poovani ◽  
Dr Saher Altaf
Keyword(s):  
Myofascial Pain ◽  
Mouth Opening ◽  
Masticatory Muscles ◽  
Matched Pair ◽  
Masticatory Muscle ◽  
Muscle Disorders ◽  
Occlusal Contact ◽  
Group I ◽  
Group Ii

BACKGROUND Masticatory system is a complex functional unit, primarily engaged in chewing, swallowing and breathing functions, and some parts are involved in taste recognition and determination of food consistency. Sophisticated functional performances of speech and emotional expressions are specifically human qualities. Irregularities in occlusion appears to be the precipitating factor in the pathogenesis of myofascial pain dysfunction syndrome. Tek- Scan III records the bite length, number, distribution, timing, duration and the relative force of each tooth contact. It also records the sequence of occlusal contacts in terms of time and the associated force with each occlusal contact. The aim of this study was to treat masticatory muscle disorders with occlusal equilibration, and compare the efficacy of treatment outcomes between selective grinding and stabilization splints using Tek-Scan III. OBJECTIVE Objective of this study was to compare the efficacy of occlusal equilibration achieved through selective griding and stabilization splints using Tek-Scan III. METHODS In this in vivo study, 40 patients with masticatory muscle disorders were selected based on the inclusion and exclusion criteria. The occlusal discrepancies were analyzed using Tek-Scan III. The selected 40 subjects were then randomly divided into 2 groups based on the treatment they recieved; Group I – Selective grinding group (20) and Group II – Stabilization splint group (20). Comparison of pre-treatment and post treatment results were evaluated in terms of pain, mouth opening, left and right side force percentage as recorded through Tek-Scan III and reduction of disclusion time. Statistical analysis was carried out with Kolmogorov Smirnov test, Wilcoxon matched pair test and Mann-Whitney U test. RESULTS Wilcoxon matched pairs test demonstrated that there was statistically significant results ( p = 0.0007) in both the groups for reduction of disclusion time, elimination of pain and improved mouth opening. Patients in Group I showed better results as compared to Group II in terms of disclusion time, pain and mouth opening. CONCLUSIONS Occlusal equilibration brought about by reducing the disclusion time using the Tek- Scan III reduced the symptoms of pain in masticatory muscles. Patients in group I (Selective grinding) however showed better results when compared to patients in group II (Stabilization splints).

Pressure-flow and volume-flow relationships of the systemic circulation of the dog

1975 ◽  
Vol 229 (3) ◽  
pp. 761-769 ◽  
Author(s):  
JF Green
Keyword(s):  
Volume Flow ◽  
Back Pressure ◽  
Atrial Pressure ◽  
Right Atrial ◽  
Right Atrial Pressure ◽  
Sodium Pentobarbital ◽  
Pressure Flow ◽  
Group I ◽  
Group Ii ◽  
The Right

Mean systemic pressure-flow (Ps-Q) and volume-flow (V-Q) relationships of the systemic vascular bed were determined in two groups of dogs anesthetized with sodium pentobarbital (group I) and with methoxyflurane (group II). All blood returning to the heart (Q) was removed from the right atrial appendage and passed through a Starling resistor, a pump, a flowmeter , and then returned directly into the pulmonary artery. Ps was estimated from plateau values of right atrial pressure obtained during stop-flow procedures. Both the Ps-Q and V-Q relationships were nonlinear. This nonlinearity may be attributed to a redistribution of blood flow between systemic vascular compartments of unequal time constants. With group II, the Ps-Q and V-Q curves were shifted markedly to the right along the Ps and V axes, respectively. Evidence is presented which suggests that this shift was due to an effective back pressure other than right atrial pressure produced by a hepatic waterfall. The beta-adrenergic antagonist practolol increased the effective back pressure and augmented the shift in the Ps-Q and V-Q curves.

scholarly journals Ground Reaction Forces during Vertical Hops Are Correlated with the Number of Supervised Physiotherapy Visits after Achilles Tendon Surgery

2021 ◽  
Vol 10 (22) ◽  
pp. 5299
Author(s):  
Łukasz Sikorski ◽  
Andrzej Czamara
Keyword(s):  
Achilles Tendon ◽  
Study Groups ◽  
The Body ◽  
Ground Reaction Forces ◽  
Group I ◽  
Tendon Surgery ◽  
Reaction Forces ◽  
Number Of Visits ◽  
Group Ii ◽  
The Right

The objective of this study was to assess the effectiveness of, and the correlation between, an average of 42 supervised physiotherapy (SVPh) visits for the vertical ground reaction forces component (vGRF) using ankle hops during two- and one-legged vertical hops (TLH and OLH, respectively), six months after the surgical suturing of the Achilles tendon using the open method (SSATOM) via Keesler’s technique. Hypothesis: Six months of supervised physiotherapy with a higher number of visits (SPHNVs) was positively correlated with higher vGRF values during TLH and OLH. Group I comprised male patients (n = 23) after SSATOM (SVPh x = 42 visits), and Group II comprised males (n = 23) without Achilles tendon injuries. In the study groups, vGRF was measured during TLH and OLH in the landing phase using two force plates. The vGRF was normalized to the body mass. The limb symmetry index (LSI) of vGRF values was calculated. The ranges of motion of the foot and circumferences of the ankle joint and shin were measured. Then, 10 m unassisted walking, the Thompson test, and pain were assessed. A parametric test for dependent and independent samples, ANOVA and Tukey’s test for between-group comparisons, and linear Pearson’s correlation coefficient calculations were performed. Group I revealed significantly lower vGRF values during TLH and OLH for the operated limb and LSI values compared with the right and left legs in Group II (p ≤ 0.001). A larger number of visits correlates with higher vGRF values for the operated limb during TLH (r = 0.503; p = 0.014) and OLH (r = 0.505; p = 0.014). An average of 42 SVPh visits in 6 months was insufficient to obtain similar values of relative vGRF and their LSI during TLH and OLH, but the hypothesis was confirmed that SPHNVs correlate with higher relative vGRF values during TLH and OLH in the landing phase.

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.

Atrioventricular responses of canine heart following chronic unilateral vagotomy

1987 ◽  
Vol 253 (2) ◽  
pp. H394-H401 ◽  
Author(s):  
D. V. Priola ◽  
C. Anagnostelis ◽  
C. Sanchez-Wilson ◽  
T. M. Blomquist
Keyword(s):  
Frequency Response ◽  
Control Mechanisms ◽  
Canine Heart ◽  
Response Curves ◽  
Group Iii ◽  
Group I ◽  
Group Ii ◽  
The Right ◽  
Inotropic Responses ◽  
Intrinsic Cardiac Nerves

The intrinsic cardiac nerves (ICN) have been shown to develop supersensitivity to nicotine (NIC) following complete extrinsic cardiac denervation. The present experiments were performed to delineate the pattern of ICN distribution in the heart by examining the pattern of NIC supersensitivity after unilateral vagotomy (VGX). Thirty-eight dogs were placed on cardiopulmonary bypass and inotropy evaluated by means of isovolumic pressures from fluid-filled balloons placed in the atria and ventricles. The animals were divided into three groups: group I, sham-operated controls; group II, animals studied 1–2 wk after VGX; and group III, animals studied 8–12 wk after VGX. Chronotropic and inotropic responses were evaluated in terms of NIC and acetylcholine (ACh) dose-response curves as well as frequency-response curves to stimulation of the intact vagus nerve (0.5–30 Hz). No change in NIC sensitivity was observed in group II, and vagal frequency-response curves were identical to group I. In group III dogs, both the right atrium and right ventricle showed significant increases in NIC sensitivity after left vagotomy. All group III animals showed right-shifted frequency-response curves. We conclude that nicotinic supersensitivity of the ICN and inotropic unresponsiveness to vagal stimulation occur but are slow in developing (70–130 days); and preganglionic sprouting does not appear to play a functional role in the adjustment of cardiac control mechanisms to unilateral vagotomy.

scholarly journals Our Experience in Pulsatile Tinnitus and a Normal Tympanic Membrane in 66 Patients

2019 ◽  
Vol 2 (02) ◽  
pp. 56-58
Author(s):  
Abdelrahman E. M. Ezzat ◽  
Mohammed A. Salem ◽  
Colin O’Rourke ◽  
John E. Fenton
Keyword(s):  
Cranial Nerve ◽  
Signs And Symptoms ◽  
Final Diagnosis ◽  
Pulsatile Tinnitus ◽  
Nerve Paralysis ◽  
Delay In Diagnosis ◽  
Group I ◽  
Risk Patients ◽  
Life Threatening ◽  
Group Ii

Abstract Introduction Pulsatile tinnitus (PT) can harbor potentially life-threatening conditions (LTCs), whereby a delay in diagnosis could be disastrous. Objective The purpose of this study was to ascertain whether associated signs and symptoms at presentation could help identify a subgroup of high-risk patients. Materials and Methods A total of 66 patients with PT were retrospectively assessed. The diagnoses were classified as group I with an LTC or not in group II. Results There were 4 patients (6%) with a final diagnosis of LTC (group I) and 62 patients (94%) without a final diagnosis of LTC or no diagnosis (group II). The results were not quite statistically significant regarding the trauma and were strongly statistically significant regarding headache and the cranial nerve paralysis. Conclusion The combination of PT with any of the three features of occipital headache, cranial nerve palsy, and recent trauma should alert the clinician to potentially serious causes.

scholarly journals Outcome of orthograde endodontic retreatment - a two-year follow-up

2016 ◽  
Vol 144 (3-4) ◽  
pp. 174-180 ◽  
Author(s):  
Jelena Neskovic ◽  
Slavoljub Zivkovic ◽  
Milica Medojevic ◽  
Milos Maksimovic
Keyword(s):  
Clinical Signs ◽  
Complete Healing ◽  
Periapical Lesion ◽  
Periapical Lesions ◽  
Group I ◽  
Group Ii ◽  
Periapical Inflammation ◽  
Endodontic Retreatment ◽  
Observation Period

Introduction. Endodontic retreatment is a complex intervention that requires detailed analysis of possible reasons for failure, and flawless practical execution of the procedure. Objective. The aim of the study was to assess the outcome of endodontic retreatment based on clinical and radiographic criteria after a two-year observation period. Methods. Clinical study included 49 teeth indicated for endodontic retreatment based on periapical index (PAI). All teeth were divided into two groups. Group I comprised teeth without any periapical lesion (PAI score of 1 and 2) while Group II consisted of teeth with visible periapical radiolucency (PAI score of 3, 4, and 5). Endodontic retreatment was completed in two visits with inter-appointment medication of 2% chlorhexidine and calcium hydroxide for two weeks. Outcome of endodontic retreatment was evaluated 12-24 months after final obturation. Results. Endodontic retreatment was successful in 93.3% in Group I after 24 months. In Group II, successful treatment and complete healing was found in 52.9% of teeth, whereas 14.7% of teeth showed only partial healing. However, clinical symptomatology was not present in any of the cases. Considering the absence of clinical signs and subjective symptoms, retreatment was successful in 67.6% of cases where chronic periapical inflammation was present. Conclusion. Endodontic retreatment was successful in high percentage in teeth with and without periapical lesions.

scholarly journals Fracture of the coronoid and pterygoid processes by firearms: case report

2007 ◽  
Vol 18 (2) ◽  
pp. 168-170 ◽  
Author(s):  
David Moraes de Oliveira ◽  
Ricardo José de Holanda Vasconcellos ◽  
José Rodrigues Laureano Filho ◽  
Rafael Vago Cypriano
Keyword(s):  
Ct Scan ◽  
Speech Therapy ◽  
Clinical Signs ◽  
Mouth Opening ◽  
Parotid Region ◽  
Comminuted Fracture ◽  
3D Ct Scan ◽  
The Face ◽  
The Right

A rare case of fracture of the coronoid and the pterygoid process caused by firearms is described. A 28-year-old male was hit by a bullet in the face, resulting in restricted mouth opening, difficulty in chewing and pain when opening the mouth. Clinical examination revealed a perforating wound in the right parotid region and a similar wound on the left side of the same region. A CT scan showed comminuted fracture of the left coronoid process and bilateral comminuted fracture of the pterygoid processes. Treatment was conservative, speech therapy was conducted and it was successful. Details of the clinical signs, radiology (3D-CT scan), treatment and follow-up are presented.

scholarly journals A novel approach to initial hearing assessment

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Tatyana Vladimirova ◽  
Lyubov Aizenshtadt ◽  
Mikhail Davydkin-Gogel
Keyword(s):  
Web Application ◽  
Age Groups ◽  
Automated System ◽  
Old Patients ◽  
Hearing Research ◽  
Group I ◽  
Hearing Assessment ◽  
Group Ii ◽  
The Right ◽  
The Web

Objective: justifying the possibility of using frequency-based hearing research via the web application ‘Automated System for Initial Hearing Assessment’. Materials and methods. The study was carried out at the Department of Otorhinolaryngology of the Samara State Medical University clinics in October 2019. It involved 91 patients 17 to 73 years old (average age 48±14.6 years). All study participants were divided into two age groups: Group I 17-59 years old), and Group II (over 60 years old). Patients were required to undergo two hearing assessment tests: using the Interacoustics AC-40 clinical audiometer and using our web application ‘Automated System for Initial Hearing Assessment’ (patent No. 2019664671). Results. The maximum difference in average hearing thresholds between pure-tone threshold audiometry and the web application in Group I was 3.3 dB at a frequency of 2 kHz on the right and 3.2 dB at frequencies of 2 and 4 kHz on the left; in Group II, it constituted 4.7 and 3.5 dB at 1 and 2 kHz, on the right, correspondingly, and 7.2 dB at 4 kHz on the left. The presented data were evaluated using the Cohen’s kappa coefficient, which confirmed high level of agreement between the results obtained using the clinical audiometer vs. our original web application. Conclusion. Based on the obtained results, a conclusion was made about the possibility of using the original web application for the initial hearing express assessment in general practice in conditions of limited availability of audiological care.

scholarly journals The Influence of Altering the Morphology of the First Mandibular Molar on Functional Mandibular Movements: A Pilot Study

2021 ◽  
pp. 1-7
Author(s):  
Luminita Oancea ◽  
Ioana Monica Vâlsan ◽  
Luminita Oancea ◽  
Mihaela Rodica Păuna ◽  
Catalin Gagiu ◽  
...  
Keyword(s):  
Descriptive Analysis ◽  
Clinical Situation ◽  
Dental Morphology ◽  
Lateral Movement ◽  
Joint Pathology ◽  
Mandibular Molar ◽  
Before And After ◽  
Movement Parameters ◽  
The Right ◽  
Mandibular Movements

Purpose: Altering the tooth morphology is a frequent clinical situation and it requires replacing the lost tooth substance by direct/indirect treatment methods. The purpose of this study is to identify the optimal study group size to quantify the extent to which the change in dental morphology influences the amplitude and path of the mandibular movements at the condylar and dental level. Materials and Methods: The study was performed on 10 young participants, without associated joint pathology, with healthy complete dentition. The Zebris JMA System (Zebris Medical GmbH, Germany) condylograph were used. The condylar and occlusal parameters were registered, before and after the composite occlusal modification on the right first mandibular molar was made and data were synthesized as Excel Data. The SPSS2 software was used for statistical analyses, a descriptive analysis of the pair differences was performed, Kolmogorov-Smirnova and Shapiro-Wilk tests were applied to verify the normality, paired sample test for 0,05 level of significance and 80% power was applied to determine the proper sample size. Conclusion: The results show a change in movement parameters at both condylar and dental level: the sagittal motion of the condyle on both sides tends to have a more vertical trajectory, the incisal guidance in protrusion and the guidance in the lateral movement on the modified part are steeper, lateral movement guidance on the other side is shallower, a tendency of retrusion is noted in both condyles. Respecting original dental morphology is essential for functional harmonious integration of the restoration.

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