Morphological Characteristics of the Temporomandibular Joint Articular Surfaces in Patients with Temporomandibular Disorders

La musculatura del sistema masticatorio y la articulación temporomandibular (ATM) están protegidos por reflejos nerviosos básicos y sistema neuromuscular a través de la coordinación de fuerzas musculares, todo lo que produce sobrecarga muscular repetitiva como los hábitos parafuncionales (HPF) pueden ocasionar trastornos temporomandibulares (TTM)1. Los HPF se caracterizan por movimientos anormales a la función mandibular normal sin objetivo funcional, al estar alterados constituyen una fuente productora de fuerzas traumáticas caracterizadas por dirección anormal, intensidad excesiva y repetición frecuente y duradera (Rolando Castillo Hernández, 2001)4. El objetivo del estudio fue identificar la asociación entre la presencia de hábitos parafuncionales de la cavidad bucal y los TTM en adolescentes de la ciudad de Puebla. Estudio observacional descriptivo. Se incluyeron 258 adolescentes, 132 (51.2%) mujeres y 126 (48.8%) hombres, con una edad promedio de 12.5±.73 y quienes fueron diagnosticados con los CDI/TTM y los HPF fueron auto-reportados por los pacientes. Se encontró una prevalencia de los TTM del 39.9% y una prevalencia de HPF del 86%. Los HPF más frecuentemente reportados fueron la succión labial y la onicofagia. Se encontró una asociación significativa (x2=7.31, p=0.007) entre los hábitos parafuncionales y los TTM en adolescentes. Palabras clave: Trastornos temporomandibulares, hábitos parafuncionales, adolescentes, articulación temporomandibular. Abstract The muscles of the masticatory system and temporomandibular joint (TMJ) are protected by basic nerve reflex and neuromuscular system through the coordination of muscle forces, all that repetitive muscle overload occurs as habit parafunctional (HPF) can cause temporomandibular disorder TMD)1. The characteristics of HPF are abnormal jaw movements without a functional objective. Being the jaw movements altered, they constitute a source of traumatic forces with an abnormal direction, excessive intensity and long-lasting and frequent duration. (Rolando Hernandez Castillo 2001)4. Objective: was to identify the association between the presences of parafunctional habits of the oral cavity and TMD in adolescents in the Puebla city in Mexico. Material and methods: Is a observational study, we included 258 adolescents 132 (51%) females and 126 (48.8%) were men, mean age 12.5±.73 and who were diagnosed with CDI/TTM and HPF were self- reported by patients. Results: The prevalence of TMD was 39.9% and a prevalence of 86% HPF. The most frequently reported HPF were lip sucking and nail biting. We found a significant association (x2= 7.31, p = 0,007) between HPF and TMD in adolescents. Key words: Parafunctional habits of oral cavity, temporomandibular disorders, temporomandibular joint. (Odontol Pediatr 2011;10(2): 90-94).

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Temporomandibular Disorders and Bruxism Prevalence in a Portuguese Sample

Medical Sciences Forum ◽

10.3390/msf2021005037 ◽

2021 ◽

Vol 5 (1) ◽

pp. 37

Author(s):

João Belo ◽

André Almeida ◽

Paula Moleirinho-Alves ◽

Catarina Godinho

Keyword(s):

Temporomandibular Joint ◽

Temporomandibular Disorders ◽

Temporomandibular Disorder ◽

Masticatory Muscles ◽

Diagnostic Aspects ◽

Relevant Role

Temporomandibular disorder (TMD) encompasses a set of disorders involving the masticatory muscles, the temporomandibular joint and associated structures. It is a complex biopsychosocial disorder with several triggering, predisposing and perpetuating factors. In the etiology of TMD, oral parafunctions, namely bruxism, play a relevant role. The study of bruxism is complicated by some taxonomic and diagnostic aspects that have prevented achieving an acceptable standardization of diagnosis. The aim of this study was to analyze the prevalence of temporomandibular disorders and bruxism in a Portuguese sample.

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Prevalence of Vertical Condilar Asymmetry of the Temporomandibular Joint in Patients with Signs and Symptoms of Temporomandibular Disorders

International Journal of Morphology ◽

10.4067/s0717-95022012000100056 ◽

2012 ◽

Vol 30 (1) ◽

pp. 315-321 ◽

Cited By ~ 7

Author(s):

Verónica Iturriaga ◽

Pablo Navarro ◽

Mario Cantin ◽

Ramón Fuentes

Keyword(s):

Temporomandibular Joint ◽

Temporomandibular Disorders ◽

Signs And Symptoms

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Occlusal stabilization appliance: evaluation of its efficacy in the treatment of temporomandibular disorders

Journal of Applied Oral Science ◽

10.1590/s1678-77572004000300015 ◽

2004 ◽

Vol 12 (3) ◽

pp. 238-243 ◽

Cited By ~ 9

Author(s):

Elisa Emi Tanaka ◽

Emiko Saito Arita ◽

Bunji Shibayama

Keyword(s):

Magnetic Resonance Imaging ◽

Magnetic Resonance ◽

Temporomandibular Joint ◽

Temporomandibular Disorders ◽

Imaging Modality ◽

Clinical Status ◽

Signs And Symptoms ◽

Resonance Imaging ◽

Magnetic Resonance Imaging Mri ◽

Mri Evaluation

Occlusal stabilization appliances or splints are the most widely employed method for treatment of temporomandibular disorders (TMD). Magnetic Resonance Imaging (MRI) is the most indicated imaging modality to evaluate the components of the temporomandibular joint (TMJ). Forty patients with signs and symptoms of temporomandibular disorders were treated with splints for a mean period of 12 months, comprising regular semimonthly follow-ups. After stabilization of the clinical status, occlusal adjustments and MRI evaluation were performed. It was concluded that the success of this kind of treatment are related to the total (70%) or partial improvement (22.5%) of painful symptomatology and to the functional reestablishment of the craniomandibular complex. The MRI allowed evaluation and also the conclusion that the splints provide conditions for the organism to develop means to resist to the temporomandibular disorders by means of elimination of several etiologic factors. Moreover, after treatment the patients are able to cope with disc displacements with larger or smaller tolerance.

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Low-level laser therapy for temporomandibular disorders (tmd) treatment: a systematic review of randomized trials

Journal of Research in Dentistry ◽

10.19177/jrd.v2e52014376-387 ◽

2014 ◽

Vol 2 (5) ◽

pp. 376

Author(s):

Priscila Leite ◽

Nicole Melo ◽

Pâmela Silva ◽

Robinsom Montenegro ◽

Paulo Bonan ◽

...

Keyword(s):

Systematic Review ◽

Temporomandibular Joint ◽

Laser Therapy ◽

Diagnostic Criteria ◽

Temporomandibular Disorders ◽

Low Level Laser Therapy ◽

Low Level ◽

Low Level Laser ◽

Level Laser ◽

Significant Difference

AIM: Conducting a systematic review of randomized clinical trials focusing on the efficacy of LLLT on pain control in patients with TMD, diagnosed by the Research Diagnostic Criteria for Temporomandibular Disorders (RDC/TMD). MATERIAL AND METHODS: Search was performed at PubMed/MEDLINE database with the terms: (1) “Laser AND temporomandibular disorders”; (2) “Laser AND temporomandibular disorders AND RDC/TMD”; (3) “Low-level laser therapy AND temporomandibular disorders”; (4) “Low-level laser therapy AND temporomandibular disorders AND RDC/TMD”; (5) “Low-level laser therapy AND temporomandibular joint dysfuntion syndrome”; (6) “Low-level laser therapy AND temporomandibular joint dysfuntion syndrome AND RDC/TMD”; (7) “Laser AND temporomandibular joint dysfuntion syndrome” (8) “Laser AND RDC/TMD”; (9) “Low-level laser therapy AND RDC/TMD”. Inclusion criteria: articles need to be randomized clinical trial performed in humans; evaluate the effect of LLLT in the treatment of TMD diagnosed by the use of RDC/TMD; published in English or Portuguese in the last 10 years. Protocol studies and pilot studies were excluded. RESULTS: Ten studies were included. The type of laser used was Gallium Aluminum Arsenide (GaAlAs) diode, with exception of 1 paper, which used super pulsed Gallium Arsenide laser. Eight studies reported decreased in pain levels, in two articles there was no statistically significant difference between test and placebo groups. CONCLUSION: In most studies, LLLT was effective in pain remission, but there is no standardization in parameters like wavelength, output power and frequency. Studies with more complex experimental designs, standardized diagnostic criteria for TMD and defined protocols for the use of LLLT are needed to determine its efficacy in the treatment of TMD.

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Prevalence of osseous changes of the temporomandibular joint in CBCT images of patients with and without temporomandibular disorders

Bioscience Biotechnology Research Communications ◽

10.21786/bbrc/10.3/27 ◽

2017 ◽

Vol 10 (3) ◽

pp. 518-524 ◽

Cited By ~ 1

Author(s):

Shahriar Shahab ◽

Zeynab Azizi ◽

Farnaz Taghavi Damghani ◽

Farnoosh Taghavi Damghani

Keyword(s):

Temporomandibular Joint ◽

Temporomandibular Disorders ◽

Osseous Changes

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Morphometric evaluation of features of remodeling of chondrocites of joint surfaces of temporomandibular joint of experimental animals in hyperglycemia

Journal of Education, Health and Sport ◽

10.12775/jehs.2021.11.06.014 ◽

2021 ◽

Vol 11 (6) ◽

pp. 137-142

Author(s):

Mykhailo Hnatiuk ◽

Lesia Rubas

Keyword(s):

Temporomandibular Joint ◽

Structural Changes ◽

Articular Surface ◽

White Male ◽

Relative Volume ◽

Male Rats ◽

Intercellular Substance ◽

Temporal Fossa ◽

Articular Surfaces ◽

Joint Surfaces

Aim: to study morphometrically the peculiarities of remodeling of chondrocytes of the articular surfaces of the temporomandibular joint in hyperglycemia.Materials and methods: Quantitative morphological methods were used to study diameters of chondrocytes and their nuclei, nuclear-cytoplasmic relationship in these cells, relative volume of damaged chondrocytes, intercellular-chondrocytic relationship in mature chondrocytes of the articular surfaces of the temporomandibular joint of 45 laboratory mature white male rats with simulated diabetes.Results: A comprehensive analysis of the morphometric parameters presented in the article showed that they did not differ in the articular surfaces of the temporal fossa and mandibular head of the intact temporomandibular joint. The expressed structural changes of chondrocytes were revealed at a monthly and a two-month diabetic arthropathy of this joint.Conclusions: Proceeded studies and obtained results suggest that prolonged hyperglycemia leads to diabetic arthropathy of the TMJ, which is characterized by atrophy of chondrocytes, violation of nuclear-cytoplasmic relationships, an increase in the relative volume of damaged chondrocytes and volume of intercellular substance. The detected changes in quantitative morphological parameters depended on the duration of hyperglycemia and dominated in the cartilaginous tissue of the articular surface of the mandibular head.

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Dental malocclusion is not related to temporomandibular joint clicking: a logistic regression analysis in a patient population

The Angle Orthodontist ◽

10.2319/041613-295.1 ◽

2013 ◽

Vol 84 (2) ◽

pp. 310-315 ◽

Cited By ~ 31

Author(s):

Daniele Manfredini ◽

Giuseppe Perinetti ◽

Luca Guarda-Nardini

Keyword(s):

Logistic Regression ◽

Temporomandibular Joint ◽

Temporomandibular Disorders ◽

Temporomandibular Disorder ◽

Open Bite ◽

Final Model ◽

Posterior Crossbite ◽

The Difference ◽

Contact Position ◽

Dental Malocclusion

ABSTRACT Objectives: To assess the association of several dental malocclusion features with temporomandibular joint (TMJ) click sounds in a population of temporomandibular disorder (TMD) patients. Materials and Methods: Four hundred forty-two TMD patients (72% female; 32.2 ± 5.7 years, range 25–44 years) were divided into a TMJ clicking and a no-TMJ clicking group, based on the Research Diagnostic Criteria for Temporomandibular Disorders (RDC/TMD) assessment. Seven occlusal features were recorded for each patient: (1) posterior crossbite, (2) overbite, (3) open bite, (4) overjet, (5) mediotrusive and (6) laterotrusive interferences and (7) retruded contact position to maximum intercuspation (RCP-MI) slide length. A logistic regression model was created to estimate the association of occlusal features with TMJ clicking. Results: The difference between the groups as for the prevalence of the various occlusal features was generally not statistically significant, with minor exceptions. Mediotrusive interferences (P = .015) and RCP-MI slide ≥2 mm (P = .001) were the two occlusal features that were associated with the probability of having TMJ clicking, even if the adjusted odds ratios for TMJ clicking were low for both variables (1.63 and 1.89, respectively). Moreover, the amount of variance in the prevalence of TMJ clicking that was predicted by the final model was as low as 4.5% (R2 = 0.045). Conclusions: Findings from the present investigation suggested that in a population of TMD patients, the contribution of dental malocclusion features to predict TMJ click sounds is minimal with no clinical relevance.

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