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1.
Braz Dent J ; 31(2): 152-156, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32556014

RESUMO

Anterior disc displacement with reduction (DDWR) is considered one of the most common disorders within the temporomandibular joint (TMJ), with a prevalence of 41% in adults. Matrix metalloproteinases play an important role in the degradation of the TMJ and the matrix metalloproteinase 1 (MMP1) 1607 1G/2G polymorphism increases the local expression of MMP1 thus leading to accelerated degradation of the extracellular matrix. The objective of this study was to evaluate the association between the 1607 1G/2G polymorphism of MMP1 gene and DDWR in a group of Mexican individuals from western Mexico. A total of 67 unrelated individuals, between the ages of 18 and 36 years, of both genders, were included in this study. Study participants with DDWR were required to meet the Research Diagnostic Criteria for Temporomandibular Disorders (RDC/TMD), while a second control group of 90 individuals without DDWR were also included. Both groups were required to have paternal and maternal ancestry (grandparents) of the same geographic and ethnic region. Genotypes were determined using the nested PCR technique. The 1G/2G polymorphism was found in 68.7%, followed by 2G/2G in 25.4% and 1G/1G in 6.0% of the cases group. While the prevalence in the control group was 55.5% for the 1G/2G polymorphism, 26.6% for 1G/1G and 17.7% for 2G/2G. An association was found between the 2G allele of the 1607 1G/2G polymorphism of MMP1 gene and the presence of DDWR in the patients of western Mexico.


Assuntos
Metaloproteinase 1 da Matriz/genética , Transtornos da Articulação Temporomandibular , Adolescente , Adulto , Estudos de Casos e Controles , Feminino , Predisposição Genética para Doença , Humanos , Masculino , Polimorfismo de Nucleotídeo Único , Articulação Temporomandibular , Adulto Jovem
2.
Stomatologiia (Mosk) ; 99(2): 61-65, 2020.
Artigo em Russo | MEDLINE | ID: mdl-32441078

RESUMO

The aim of the study was to analyze the effectiveness of elastocorrective therapy in the complex treatment of patients with musculo-articular dysfunction of TMJ. Patients (n=237) underwent a comprehensive examination, including: 1) analysis of control and diagnostic plaster models of the jaws; 2) clinical examination; 3) X-ray examination: panoramic X-ray and TRG in lateral projection, computed tomography (CT) of the temporomandibular joint or X-ray zonography of the temporomandibular joint, and magnetic resonance tomography (MRI) of the temporomandibular joint, 4) electromyography of the chewing muscles, 5) T-Scan occlusion computer analysis; 6) stabilometry. After clinical, X-ray examination and data analysis of functional research methods, an algorithm for diagnostic and therapeutic measures was developed. All patients were prescribed the use of elastocorrector: at night during sleep and during the day for 1.5-2 hours. As a result of the use of elastocorrector in patients with muscle-articular dysfunction of the TMJ the position of the mandible was normalized and the spatial ratio of TMJ elements was optimized, the masticatory muscles function and bioelectric activity was normalized and the overload of muscles of mastication during functional movements is eliminated. «Elastocorrector¼ appliance can be used in patients with TMJ musculo-articular dysfunction both for orthodontic treatment (to eliminate chewing muscle hypertonus, compression of intra-articular structures, premature occlusive contacts) and to prepare for further treatment (orthopedic, therapeutic, etc.).


Assuntos
Transtornos da Articulação Temporomandibular , Síndrome da Disfunção da Articulação Temporomandibular , Humanos , Mastigação , Músculos da Mastigação , Articulação Temporomandibular
3.
Stomatologiia (Mosk) ; 99(2): 97-104, 2020.
Artigo em Russo | MEDLINE | ID: mdl-32441083

RESUMO

AIM: To develop a method for automated analysis of TMJ elements based on computed tomography and a method for analyzing the features of the ratio of TMJ elements when changing the position of the mandible without repeated CT examination. MATERIAL AND METHODS: To complete method required a computer tomogram of the temporomandibular joint in habitual occlusion recorded on spiral or cone-beam imaging; and 3D scans of the dentition obtained with intraoral and laboratory scanners; computer software - 3D graphics editor that can handle volumetric CT data and 3D mesh objects. RESULTS: Analysis of the joint space of the temporomandibular joint in the entire volume, not a single slice represents a more complete and reliable information about the condition of the joint. The presented method of predicting the position of TMJ heads on the basis of obtaining bite registers eliminates the probable errors of the doctor and the need for repeated CT scans, which reduces the radiation load on the patient. Virtual simulation of movements of the mandible from the position of habitual occlusion in the position of Central correlation, protrusion, right and left literaturesee with the visualization of movements of the articular heads helps to better understand the biomechanics of the TMJ, diagnostics and to obtain valuable data about the individual characteristics of the masticatory apparatus of the patient. CONCLUSION: The developed virtual articulator (patent No. 2567604) is another useful step in the development of digital technologies in dentistry.


Assuntos
Transtornos da Articulação Temporomandibular , Articulação Temporomandibular , Simulação por Computador , Tomografia Computadorizada de Feixe Cônico , Humanos , Mandíbula
4.
J Contemp Dent Pract ; 21(3): 337-349, 2020 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-32434984

RESUMO

AIM: Temporomandibular joint ankylosis (TMJA) management involves many surgical treatment modalities depending on the experience of the operator. A lot of literature has been published on various treatment modalities. Many systematic reviews (SRs) were published without any published prior protocol. So, the study aimed to evaluate the quality of SRs with meta-analysis of TMJA management. MATERIALS AND METHODS: Systematic reviews with meta-analysis were included for the quality assessment using AMSTAR (assessment of multiple SRs) and Glenny et al. checklist by two independent teams. The search was limited to the Medline database archival (from January 1980 to December 2018). RESULTS: The primary search identified 1,507 related articles. After activation of different filters, abstracts screening, and cross-referencing, finally, a total of six studies were assessed to make the overview up-to-date. CONCLUSION: The articles scored 8 to 11 with AMSTAR and 7 to 13 with the Glenny et al. checklist. None of the published reviews received maximum scores. The methodology and heterogeneity are essential factors to assess the quality of the published literature. CLINICAL SIGNIFICANCE: None of the included meta-analysis was registered or published protocol with Prospero or Cochrane before publication for better validity of the studies. The authors are advised to follow reporting criteria so that in the future it is possible to provide the standards of care for TMJA with the highest quality of evidence.


Assuntos
Anquilose , Lista de Checagem , Humanos , Articulação Temporomandibular , Resultado do Tratamento
5.
J Contemp Dent Pract ; 21(2): 133-139, 2020 Feb 01.
Artigo em Inglês | MEDLINE | ID: mdl-32381816

RESUMO

AIM: The aim of the current study was to correlate the clinical symptoms that are associated with temporomandibular disorder (TMD) to the osseous changes occurring in the affected temporomandibular joint (TMJ), as detected by cone-beam computed tomography (CBCT). MATERIALS AND METHODS: The clinical data of patients that presented with TMJ symptoms was collected and correlated with the CBCT findings for the same patients. Patient recruitment took place over a 1-year period in the Oral and Maxillofacial Surgery and Oral and Maxillofacial Radiology department of the same academic institution. RESULTS: There was a limited mouth opening (MO) (<3 cm). More importantly, there was a statistically significant positive relation between pain and loss of cortication. CONCLUSION: There was no significant correlation between CBCT findings consistent with TMJ degeneration and clinical symptoms. CLINICAL SIGNIFICANCE: Cone-beam computed tomography evaluation of the TMJ is important for providing information about the state and level of TMJ degeneration if any. However, clinical findings should be the most important factor when considering management options for symptomatic TMJ.


Assuntos
Cirurgia Bucal , Transtornos da Articulação Temporomandibular , Tomografia Computadorizada de Feixe Cônico , Humanos , Côndilo Mandibular , Articulação Temporomandibular
6.
Rev. cient. odontol ; 8(1): e006-e006, ene.-abr. 2020. tab.
Artigo em Espanhol | LILACS, LIPECS | ID: biblio-1095497

RESUMO

Introducción: Las alteraciones morfológicas de los cóndilos se determinan por la disminución de tejido óseo en el cóndilo mandibular, lo que cambia su forma y tamaño. Entre los signos más frecuentes encontramos el aplanamiento condilar, que se presenta entre los procesos dinámicos. Los cambios morfológicos más frecuentes son aplanamiento condilar, caracterizado por la pérdida de la convexidad del cóndilo articular. Radiográficamente, se presenta como una superficie convexa, la cortical ósea condilar es continua con ausencia de zonas radiopacas o radiolúcidas irregulares. Objetivos: Evaluar las características radiográficas de aplanamiento condilar de la articulación temporomandibular en pacientes dentados y no dentados mediante el uso de la radiografía panorámica. Métodos: Se evaluaron 520 radiografías panorámicas (260 de pacientes dentados y 260 no dentados), de pacientes de ambos sexos, entre 18 a 70 años, que fueron tomadas en el Centro de Radiología Digital Oral y Maxilofacial D3RX de Floridablanca (Colombia), entre enero de 2017 y diciembre de 2018, elegidos de forma aleatoria simple. La muestra fue definida mediante una base de datos de estudios científicos referenciados bibliográficamente, y mostró en este estudio una población evaluada con más alto promedio. Resultados: Los pacientes desdentados tienen mayor incidencia a presentar alguna alteración en la forma, el lado y el tipo de aplanamiento según la radiografía panorámica. Conclusiones: Los cambios morfológicos de los cóndilos observados en la radiografía panorámica según género mostró mayor prevalencia en mujeres que en hombres, mayor incidencia en cóndilos redondeados y afectación mayor en pacientes no dentados. Los resultados de este estudio muestran que, a pesar de que la radiografía panorámica no es considerada la mejor herramienta para determinar la presencia de cambios morfológicos leves a nivel de la mandíbula, puede ser utilizada por el odontólogo como la primera ayuda diagnóstica para obtener una visión general no solo de la articulación temporomandibular, sino de otras estructuras anatómicas y dentarias que deben ser estudiadas en trastornos de la articulación temporomandibular. (AU)


Introduction: Morphological alterations of the condyles are determined by a decrease of bone tissue in the mandibular condyle, changing its shape and size. One of the most frequent signs of these alterations involves condylar flattening that occurs among dynamic processes and is characterized by a loss of convexity of the articular condyle. Radiographically this is observed as a convex surface, the condylar bone cortex is continuous and there is an absence of irregular radiopaque or radiolucent areas. Objectives: To evaluate the radiographic characteristics of condylar flattening of the temporomandibular joint in dentate and non-dentate patients using panoramic radiography. Methods: We evaluated panoramic radiographs obtained at the D3RX Oral and Maxillofacial Digital Radiology Center in Floridablanca-Colombia from January 2017 to December 2018. Patients were randomly selected according to fulfillment of the following inclusion criteria:availability of panoramic radiographs showing the entire condylar structure of male and female patients aged 18 to 70 years attending from January 2017 to December 2018. This number of radiographs was defined according to a database. We evaluated the presence of flattening, the shape and the affected side and sex. The Chi-square test was applied. P <0.005. Results: A total of 520 panoramic radiographs were obtained; 260 from dentate patients and 260 from non-dentate patients. Patient characteristics show that edentulous patients had a higher incidence of alterations in the shape, side and type of flattening in the panoramic radiographs. Edentulous patients have a higher incidence of presenting some alteration in their shape, side and flattened condyles observed in panoramic radiographs in 51.2% versus 35.1% of dentate patients (P <0.001). Conclusions: The morphological changes of the condyles observed in panoramic radiographs were more prevalent in women than men, with a higher incidence in rounded condyles and greater involvement in edentulous patients. The results of this study show that although panoramic radiography is not considered the best tool to determine the presence of slight morphological changes at the level of the jaw, it can be used as the first diagnostic aid to obtain an overview of not only the temporomandibular joint but also other anatomical and dental structures that should be studied in disorders of the temporomandibular joint. (AU)


Assuntos
Humanos , Masculino , Feminino , Adolescente , Adulto , Pessoa de Meia-Idade , Idoso , Articulação Temporomandibular , Radiografia Panorâmica , Côndilo Mandibular
7.
Yonsei Med J ; 61(4): 331-340, 2020 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-32233176

RESUMO

PURPOSE: Osteoarthritis (OA) of the temporomandibular joint (TMJ) elicits cartilage and subchondral bone defects. Growth hormone (GH) promotes chondrocyte growth. The aim of this study was to evaluate the efficacy of intra-articular injections of GH to treat TMJ-OA. MATERIALS AND METHODS: Monosodium iodoacetate (MIA) was used to induce OA in the TMJs of rats. After confirming the induction of OA, recombinant human GH was injected into the articular cavities of rats. Concentrations of GH and IGF-1 were measured in the blood and synovial fluid, and OA grades of cartilage and subchondral bone degradation were recorded by histological examination and micro-computed tomography. RESULTS: MIA-induced OA in the rat TMJ upregulated insulin-like growth factor-1 (IGF-1) rather than GH levels. GH and IGF-1 concentrations were increased after local injection of GH, compared with controls. Locally injected GH lowered osteoarthritic scores in the cartilage and subchondral bone of the TMJ. CONCLUSION: Intra-articular injection of GH improved OA scores in rat TMJs in both cartilage and subchondral bone of the condyles without affecting condylar bone growth. These results suggest that intra-articular injection of human GH could be a suitable treatment option for TMJ-OA patients in the future.


Assuntos
Condrócitos/efeitos dos fármacos , Hormônio do Crescimento/administração & dosagem , Fator de Crescimento Insulin-Like I/administração & dosagem , Osteoartrite/tratamento farmacológico , Articulação Temporomandibular/efeitos dos fármacos , Idoso , Animais , Cartilagem Articular/diagnóstico por imagem , Cartilagem Articular/patologia , Hormônio do Crescimento/efeitos adversos , Hormônio do Crescimento Humano , Humanos , Injeções Intra-Articulares , Masculino , Osteoartrite/diagnóstico por imagem , Osteoartrite/patologia , Ratos , Líquido Sinovial , Articulação Temporomandibular/diagnóstico por imagem , Articulação Temporomandibular/fisiopatologia , Microtomografia por Raio-X
8.
Oral Maxillofac Surg ; 24(2): 203-209, 2020 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-32306164

RESUMO

PURPOSE: The aim of this study was to determine the accuracy of orthopantomograms (OPGs) when assessing post-operative temporomandibular joint (TMJ) implant position, compared with cone beam computerized tomography (CBCT). METHODS: A retrospective analysis was undertaken on six adult patients who were implanted with a custom TMJ prosthesis due to end-stage TMJ disease. Post-operative CBCT was compared with post-operative OPGs. Overall magnification of each OPG was calculated and used to linearly rescale each image. Implant position was assessed by measuring the gonion angle and the distance between each surgical screw and the mandibular gonion (SG length). RESULTS: Mean magnification for OPGs was 24.2%. There were no significant differences (p > 0.05) in the gonion angle on OPGs compared with CBCT images. There was a mean decrease in SG lengths of 0.02 mm on OPGs, corresponding to error level of 5.31%. The 95% limits of agreement between OPGs and CBCT images for SG lengths were 1.65 mm and - 1.73 mm. CONCLUSION: This study presents a clinically applicable and accurate first-line radiographic screening tool to assess TMJ implant position. When combined with clinical assessment, OPGs can help reduce the need for further imaging and radiation exposure post-operatively.


Assuntos
Implantes Dentários , Transtornos da Articulação Temporomandibular , Adulto , Tomografia Computadorizada de Feixe Cônico , Humanos , Radiografia Panorâmica , Estudos Retrospectivos , Articulação Temporomandibular
9.
Oral Maxillofac Surg ; 24(2): 211-215, 2020 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-32323042

RESUMO

PURPOSE: Arthrocentesis of the temporomandibular joint (TMJ) is a minimally invasive surgical procedure that provides good clinical results such as the improvement of jaw movements. It also helps to balance the synovial liquid viscosity and relieve TMJ pain by the washout of inflammatory components from the upper compartment. The purpose of this study is to report a case series of patients submitted to a clinical-based protocol of diagnosis of TMJ joint open lock and treatment with arthrocentesis. MATERIAL AND METHODS: Patients suffering from a recurrent unilateral open lock of the TMJ were submitted to one arthrocentesis of the affected TMJ and all of them reported that the open lock was caused by daily stomatognathic activities. To decide the arthrocentesis as the initial treatment of these patients, the authors followed a rational protocol of diagnosis. RESULTS: Ten patients were included in the present study. No complications occurred during arthrocentesis. Immediately, 1 week, 1 month, and 6 months after arthrocentesis, patients did not suffer from open lock or disc click anymore. They also reported no more pain because it was strictly related to the disc click. CONCLUSIONS: All patients of the present study improved from the open lock and disc click of the affected TMJ for 6 months after arthrocentesis. The clinical-based protocol of diagnosis of TMJ open lock reported in the present study, followed by the treatment with arthrocentesis is a reasonable, low-cost, and safe method to treat patients with the acute open lock.


Assuntos
Luxações Articulares , Transtornos da Articulação Temporomandibular , Artrocentese , Humanos , Paracentese , Amplitude de Movimento Articular , Articulação Temporomandibular , Resultado do Tratamento
10.
J Oral Facial Pain Headache ; 34(2): 149-156, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32255580

RESUMO

AIMS: To study the effect of platelet-rich plasma (PRP) injections on pain reduction in patients with temporomandibular joint osteoarthritis (TMJ OA). METHODS: The authors performed a comprehensive search of the MEDLINE, PubMed, and Web of Science databases to retrieve RCTs published up to July 2018. Pain outcomes (visual analog scale scores) were extracted to assess the effect of PRP injections on TMJ OA. All data analyses were conducted using RevMan 5.3. RESULTS: Six studies were included. According to the results of these trials, intra-articular injections of PRP were more effective than placebo for pain reduction (6 months postinjection: mean difference [MD] -2.82, 95% CI -3.39 to -2.25, P < .00001; 12 months postinjection: MD -3.29; 95% CI -4.07 to -2.52, P < .00001). Additionally, the comparison between PRP and hyaluronic acid injections showed a statistically significant difference in pain reduction in support of PRP (MD -0.81; 95% CI -1.22 to -0.40; P = .0001) at 12 months postinjection. All trials revealed a moderate risk of bias. CONCLUSION: Based on current evidence, PRP injections may reduce pain more effectively than placebo injections in TMJ OA at 6 months (level of evidence: moderate) and 12 months (level of evidence: moderate) postinjection. This significant difference in pain reduction could also be seen when PRP was compared to hyaluronic acid at 12 months postinjection (level of evidence: low). It can be cautiously interpreted that PRP has a beneficial effect on the relief of TMJ OA pain. Large-scale, low-bias RCTs are needed to test whether PRP injection should be a routine treatment for patients with TMJ OA.


Assuntos
Osteoartrite , Plasma Rico em Plaquetas , Humanos , Injeções Intra-Articulares , Dor , Ensaios Clínicos Controlados Aleatórios como Assunto , Articulação Temporomandibular , Resultado do Tratamento
11.
J Oral Sci ; 62(2): 197-201, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32224572

RESUMO

Magnetic resonance imaging (MRI) was used to observe growth of the mandibular condyle, mandibular fossa, and articular disc as a single unit. Changes in each component's relative position and size were observed using 7-tesla MRI. Mandibular condyle chondrocytes' growth was evaluated with immunohistochemistry, using the expression of zinc transporter ZIP13. Three-dimensional T1-weighted (T1w) MRI was used to obtain images of the TMJ of Sprague Dawley rats at 4-78 days old (P4-78) with a voxel resolution of 65 µm. Two-dimensional T1w MR images were acquired after a subcutaneous injection of the contrast reagent gadolinium diethylenetriamine pentaacetic acid (Gd-DTPA). The T1w MR images showed that the mandibular condyle was located posterior to the mandibular fossa until P20; however, it then moved to a location underneath the mandibular fossa. In the Gd-DTPA enhanced images, the articular disc was identified as a region with lower signal intensity from P20. The number of ZIP13-positive chondrocytes at P6 was larger than the number at P24. In conclusion, the mandibular condyle with cartilage and disc grows on the posterior side of the mandibular fossa until P20, which was the weaning age. Then, the condyle fit into the mandibular fossa and completed the functional unit.


Assuntos
Côndilo Mandibular , Articulação Temporomandibular , Animais , Imagem por Ressonância Magnética , Ratos , Ratos Sprague-Dawley , Desmame
12.
Indian J Dent Res ; 31(1): 42-47, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32246680

RESUMO

Aim: Temporomandibular disorders (TMDs) comprise a number of signs and symptoms affecting the masticatory muscles, temporomandibular joint (TMJ), or both. Because of the multifactorial etiology of such problems, the treatment usually involves more than one modality. Objectives: Therefore, the aim of this study was to compare the effectiveness of transcutaneous electric nerve stimulation (TENS) and low-level laser therapy for the treatment of patients with TMD. Materials and Methods: The clinical trial was performed with 60 patients diagnosed with TMD of multiple causes. All the patients received both methods of treatment in 6 consecutive weeks. A paired t-test was applied to verify the significance of the results. Results: A significant improvement in the range of motion and pain relief for both the therapies was observed. Conclusions: Comparatively after analyzing the two methods, the values obtained after LLLT were significantly higher than those obtained after TENS therapy (P < 0.01).


Assuntos
Terapia com Luz de Baixa Intensidade , Transtornos da Articulação Temporomandibular , Estimulação Elétrica Nervosa Transcutânea , Humanos , Músculos da Mastigação , Articulação Temporomandibular , Resultado do Tratamento
13.
Wiad Lek ; 73(2): 245-249, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32248153

RESUMO

OBJECTIVE: The aim: To investigate the frequency of functional TMJ disorders in patients with fractures of the mandible. PATIENTS AND METHODS: Materials and methods: To achieve this goal, 111 patients hospitalized in the department of surgical dentistry of the Chernivtsi Regional Clinical Hospital were examined for traumatic fractures of the mandible with functional disorders of the TMJ (occlusive, muscular, articular disorders). The examination of patients with functional disorders wasbased on Express - the conclusion of the Hamburg Protocol: 1. pain in palpation of joints; 2. pain in palpation of chewing muscles; 3. presence of noises in the joints; 4. violation of the opening trajectory; 5. the opening of the mouth is limited; 6. eccentric occlusion, premature contacts. Statistical processing of research results was carried out using commonly used methods of variation statistics. RESULTS: Results: We found that on average, mandibule fractures showed the highest number of single-function occlusion`s (18.92%) and articular disorders (21.62%) and multifunctional occlusal-articular disorders (20.72%), with the smallest the frequency of one-function muscle`s disorders (4.50%). Multifunctional TMJ disorders «occlusal + muscle¼ and «muscular-articular¼ in this contingent of patients were determined, on average, at the same percentages (10.81%). Attention was drawn to the fact that «muscular + articular¼ dysfunction of the TMJ was diagnosed more frequently with the immobilization of the fragment with the help of osteosynthesis (18,18 ± 4,54%) and with the combined method (15,39 ± 3,84%) than when both jaws are splinted, p <0,05. CONCLUSION: Conclusions: It was established that in patients with fractures of the jaws of different localization single-functional articular disorders (21.62% of the subjects) and multifunctional «occlusion-articular¼ disorders (20.72% of the examined) predominated. In this case, the frequency of TMJ dysfunction, to a large extent, depended on the nature of the displacement and the way of immobilization of the fragments of the mandible.


Assuntos
Fraturas Ósseas , Humanos , Mandíbula , Mastigação , Articulação Temporomandibular , Transtornos da Articulação Temporomandibular
14.
Int. arch. otorhinolaryngol. (Impr.) ; 24(1): 68-72, Jan.-Mar. 2020. tab, graf
Artigo em Inglês | LILACS | ID: biblio-1090546

RESUMO

Abstract Introduction The prevalence of tinnitus is higher in individuals with temporoman- dibular joint disorder (TMD) than in the general population. Magnetic resonance imaging (MRI) of the temporomandibular joint (TMJ) is the method of choice for investigation, and it has been hypothesized that specific MRI findings might be observed in TMD with comorbid tinnitus. Objective To comparatively describe MRI findings in patients with TMD with and without tinnitus, identifying the most common TMJ alterations and determining whether a correlation exists between severity of TMD and tinnitus. Methods A cross-sectional study of 53 adult patients with bilateral or unilateral TMD (30 with and 23 without tinnitus). The association between tinnitus and morphological aspects of TMD (changes in condylar morphology, articular eminence morphology, and disc morphology), disc displacement (with/without reduction), condylar translation, and intra-articular effusion was analyzed on MRI images. Results The mean patient age was 46.12 ± 16.1 years. Disc displacement was the most common finding in both groups (24 patients with tinnitus versus 15 without; p = 0.043). Only the frequency of disc displacement with reduction was significantly different between groups. Conclusion Additional imaging techniques should be explored to detect specific aspects of the relationship between tinnitus and TMD.


Assuntos
Humanos , Masculino , Feminino , Adulto , Pessoa de Meia-Idade , Articulação Temporomandibular/diagnóstico por imagem , Zumbido/diagnóstico por imagem , Imagem por Ressonância Magnética , Transtornos da Articulação Temporomandibular/diagnóstico por imagem , Audiometria de Resposta Evocada , Audiometria de Tons Puros , Articulação Temporomandibular/patologia , Zumbido/diagnóstico , Zumbido/etiologia , Índice de Gravidade de Doença , Transtornos da Articulação Temporomandibular/complicações , Transtornos da Articulação Temporomandibular/patologia , Estudos Transversais
15.
J Orthod ; 47(2): 163-169, 2020 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-32114870

RESUMO

Osteochondroma of the condyle is a rare, slow-growing, benign tumour of the temporomandibular joint that can result in facial asymmetry, limited mouth opening, temporomandibular joint dysfunction and malocclusion. The large majority of osteochondromas occur at the distal metaphysis of the femur and the proximal metaphysis of the tibia, whereas only 0.6% of osteochondromas have been reported as occurring in the craniofacial region. We discuss the diagnosis and treatment of a 56-year-old fit and well male patient who presented to the Orthodontic Department at Wexham Park Hospital with a four-year history of progressive facial asymmetry and functional concerns, owing to a rare osteochondroma of the condyle.


Assuntos
Neoplasias Mandibulares , Transtornos da Articulação Temporomandibular , Assimetria Facial , Humanos , Masculino , Côndilo Mandibular , Pessoa de Meia-Idade , Articulação Temporomandibular
16.
J Orthod ; 47(2): 140-148, 2020 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-32114874

RESUMO

OBJECTIVE: It has been reported that temporomandibular joint (TMJ) function after orthognathic surgery differs from normal patients. Dysfunction of the joints occurs often even in the general public, with an incidence in the range of 20%-25%. Population-based studies among adults report that approximately 10%-15% have symptoms of pain and 5% of them had a perceived need for treatment. To date, no studies have reported on the evaluation of TMJ function after orthognathic surgery through the use of four-dimensional jaw tracking. DESIGN AND SETTING: This study evaluated TMJ function using such a device and information from a TMJ questionnaire. Sixteen orthognathic surgery patients and 17 controls were included in this study. Four-dimensional jaw tracking information was obtained using the SiCAT JMT device. Clinical signs and jaw function were evaluated. RESULTS: Within the limitations of the study, the following results were seen using the SICAT JMT+ jaw tracking device: (1) no significant differences were found in any of the millimetric measurements between the surgery patients and controls; (2) no significant difference was found in subjective reported symptoms of pain, clicking, crepitation, locking, stiffness, headaches and migraines between the groups; and (3)there was a significant difference in the popping of the joints for surgery and non-surgery groups. CONCLUSION: Jaw tracking did not detect significant differences in jaw function, but some clinical symptoms were present.


Assuntos
Cirurgia Ortognática , Procedimentos Cirúrgicos Ortognáticos , Transtornos da Articulação Temporomandibular , Adulto , Humanos , Movimento , Articulação Temporomandibular
17.
J Orthod ; 47(2): 156-162, 2020 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-32126863

RESUMO

This case report describes the successful second surgical treatment of a 26-year-old white female patient with a retrognathic mandible and previous bilateral total joint prostheses placement. The patient had previously presented with bilateral idiopathic condylar resorption (ICR) which caused clockwise mandibular rotation and resulted in anterior open bite and a retrognathic mandible. The patient had undergone definitive corrective for the ICR where condylectomies were performed bilaterally. In addition, total joint prostheses using 'stock joints' were used to restore the condyle and glenoid fossa on both sides. Although the previous surgery corrected the anterior open bite and restored the condyles, the patient was still suffering from joint symptoms (significant pain), restricted mandibular movements, increased overjet (12 mm) and a retrognathic mandible. The treatment plan included a combined orthodontic surgical approach: (1) bimaxillary orthognathic surgery: a surgical procedure on the mandible to reposition the prosthetic joints and correct the mandible position, and a segmental LeFort I to expand the maxilla; and (2) post-surgical orthodontics treatment to detail the occlusion. At the end of the treatment, good aesthetic and functional results were obtained with the cooperation of two specialties. This case emphasises the importance of three-dimensional planning and multidisciplinary treatment when addressing complex jaw movements. It also emphasises the importance orthodontic planning and collaboration with the orthodontist.


Assuntos
Prótese Articular , Procedimentos Cirúrgicos Ortognáticos , Adulto , Feminino , Humanos , Mandíbula , Côndilo Mandibular , Reoperação , Articulação Temporomandibular
18.
Stomatologiia (Mosk) ; 99(1): 55-60, 2020.
Artigo em Russo | MEDLINE | ID: mdl-32125303

RESUMO

AIM: To increase the efficiency of diagnosis and orthodontic treatment of patients with temporomandibular joint dysfunction based on the study of the relationship between the features of the position of the heads of the lower jaw and various face types in patients aged 25 to 44 years according to cone beam computed tomography. We examined 100 people who were divided into two main groups (50 males, 50 females). To study the formed groups index method for diagnosing facial types according to Isar was used. The facial indicator was determined: the percentage of physiognomic height to the morphological width of the face. The structural features and relative positions of the TMJ bone structures in patients with TMJ dysfunction in various face types were studied in the Avantis 3D computer program. It was noted that the upper position of the lower jaw heads in women and men with a narrow type of face was observed in 50% and 40% of cases, respectively; the distal position of the lower jaw heads in women and men with a wide type of face was observed in 50% and 42.3% of cases, respectively. The results of the study indicate that there is a relationship between different types of face and the position of the lower jaw heads in the lower jaw, which should be considered in comprehensive treatment planning. The most at risk of temporal dysfunction is the TMJ of a woman with a narrow type of face, in which dominates the upper position of the lower jaw heads and a woman with a wide type of face with the distal position of the lower jaw heads. Before orthodontic treatment it is necessary to investigate the position of the TMJ heads with the help of CBCT and make a mandatory correction before the beginning of orthodontic treatment.


Assuntos
Síndrome da Disfunção da Articulação Temporomandibular , Articulação Temporomandibular , Adulto , Tomografia Computadorizada de Feixe Cônico , Feminino , Humanos , Masculino , Mandíbula , Raios X
19.
Quintessence Int ; 51(4): 330-333, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32128528

RESUMO

BACKGROUND: The twin block Injection is a novel nerve block that has been shown previously to be efficacious in the management of masticatory myofascial pain. Little is known about its effectiveness for reducing pain from the temporomandibular joint (TMJ). CASE REPORT: A 19-year-old man presented with limited mouth opening with pain in the left side of his face. After a thorough history and examination was completed, the diagnosis was acute anterior disc displacement without reduction in the left TMJ and myalgia of the left side temporalis and masseter muscles. After receiving the twin block injection, the patient reported that the pain in his TMJ had reduced along with the concomitant myalgia. The twin block injection is efficacious for the management of both arthrogenous and myogenous sources of temporomandibular disorders.


Assuntos
Bloqueio Nervoso , Transtornos da Articulação Temporomandibular , Adulto , Humanos , Injeções , Masculino , Músculo Masseter , Articulação Temporomandibular , Adulto Jovem
20.
Cell Prolif ; 53(4): e12755, 2020 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-32154622

RESUMO

OBJECTIVES: Ageing could be a contributing factor to the progression of temporomandibular joint osteoarthritis (TMJ OA), whereas its pathogenesis and potential therapeutic strategy have not been comprehensively investigated. MATERIALS AND METHODS: We generated ageing mouse models (45-week and 60-week; 12-week mice as control) and intermittently injected 45-week mice with parathyroid hormone (PTH(1-34)) or vehicle for 4 weeks. Cartilage and subchondral bone of TMJ were analysed by microCT, histological and immunostaining. Western blot, qRT-PCR, ChIP, ELISA and immunohistochemical analysis were utilized to examination the mechanism of PTH(1-34)'s function. RESULTS: We showed apparent OA-like phenotypes in ageing mice. PTH treatment could ameliorate the degenerative changes and improve bone microarchitecture in the subchondral bone by activating bone remodelling. Moreover, PTH inhibited phosphorylation level of Smad3, which can combine with p16ink4a gene promoter region, resulting in reduced senescent cells accumulation and increased cellular proliferation of marrow mesenchymal stem cells (MSCs). ELISA also showed relieved levels of specific senescent-associated secretory phenotype (SASP) in ageing mice after PTH treatment. CONCLUSIONS: In summary, PTH may reduce the accumulation of senescent cells in subchondral bone by inhibiting p16ink4a and improve bone marrow microenvironment to active bone remodelling process, indicating PTH administration could be a potential preventative and therapeutic treatment for age-related TMJ OA.


Assuntos
Hormônios e Agentes Reguladores de Cálcio/uso terapêutico , Osteoartrite/tratamento farmacológico , Hormônio Paratireóideo/uso terapêutico , Articulação Temporomandibular/efeitos dos fármacos , Envelhecimento , Animais , Células Cultivadas , Modelos Animais de Doenças , Masculino , Camundongos , Camundongos Endogâmicos C57BL , Osteoartrite/patologia , Osteoartrite/fisiopatologia , Osteogênese/efeitos dos fármacos , Articulação Temporomandibular/patologia , Articulação Temporomandibular/fisiopatologia
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