Title, Disfunción de la articulación temporomandibular: una guía práctica. Author, Annika Isberg-Holm. Publisher, Artes Médicas, ISBN, Disfuncion de la articulacion temporomandibular / Temporomandibular Joint Dysfunction: Una guia practica para el Annika Isberg. Editorial. Disfunción de la articulación temporomandibular: una guía práctica. Front Cover. Annika Isberg. Artes Médicas, – pages.
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High-resolution ultrasonography in assessing temporomandibular joint idberg position. MRI examinations were performed using 1. MRI depicted 68 The Youden index was 0. Based on our results, high-resolution ultrasonography showed high sensitivity, specificity and accuracy in the diagnosis of TMJ disc displacement.
To construct self-assembly fibrocartilage model of goat temporomandibular joint disc and observe the biological characteristics of the self-assembled fibrocartilage constructs, further to provide a basis for tissue engineering of the temporomandibular joint disc and other fibrocartilage. Cells from temporomandibular joint discs of goats were harvested and cultured. One day after seeding, goat temporomandibular joint disc cells in agarose wells were gathered and began to self-assemble into a disc -shaped base, temporomandibulsr gradually turned into a round shape.
When cultured for 2 weeks, hematoxylin-eosin staining was conducted and observed that cells were round and wrapped around by the matrix. Immunohistochemistry staining demonstrated brown yellow particles in cytoplasm and around extracellular matrix, which showed self-assembly construct can produce type I collagen as native temporomandibular joint disc tissue.
Production of extracellular matrix in self-assembly construct as native temporomandibular joint disc tissue indicates that the use of agarose wells to construct engineered temporomandibular joint disc will be possible and practicable.
Positional and morphologic changes of the temporomandibular joint disc using magnetic resonance imaging. To evaluate displacement and morphologic changes of the temporomandibular joint TMJ disc in patient with internal derangement using magnetic resonance imaging MRI.
Positional and morphologic changes of the TMJ disc were assessed. Lateral or medial disc displacement was also evaluated on cornal images. Among 63 discs with anterior disc displacement, 37 discs were assessed as a biconcave disc and 21 as a deformed disc. Rotational disc displacement was observed in 35 disc. Anteromedial disc displacement was observed in 29 discsand anterolateral direction in 6 discs.
Among 35 rotational displacement, 5 biconcave discs and 21 deformed discs were observed. Rotational and sideways displacement of TMJ discs were found to be common and an important aspect of internal derangement.
This study also suggests that sagittal and coronal images of the TMJ have complementary abilities for an assessment of joint abnormality. Preliminary optical coherence tomography investigation of the temporo-mandibular joint disc.
The morphology and position of the temporo-mandibular disc are key issues in the temporomandibulat and treatment of arthrogenous temporo-mandibular disorders. Magnetic resonance imaging and arthroscopy are used today to identify: The present study proposes the investigation of the temporo-mandibular joint disc by optical coherence tomography OCT.
They had a normal morphology, with a thicker pars posterior 2,6 mm on the average and a thinner pars intermedia 1mm on the average. We investigated the disc samples using two different OCT systems: Ibserg OCT investigation of the usberg joint discs revealed a homogeneous microstructure. OCT is a promising imaging method for the microstructural characterization of the temporo-mandibular disc. Temporomandibular joint – normal features and disc displacements: Disc displacement of the temporomandibular joint has been defined as an abnormal relationship between the articular disc and the mandibular condyle, fossa and articular eminence.
Disc displacements may occur without immediate interference in the function of the joint. Magnetic resonance imaging shows high diagnostic accuracy in the determination of articular disc position and has been indicated as the diagnostic isber of choice for soft tissue abnormalities of the temporomandibular joint. The aim of this study is to review the literature including the normal features and different types of disc displacement of the temporomandibular joint as well as the imaging findings, emphasizing the role of magnetic resonance imaging.
Osteoarthritis of the temporomandibular joint organ and its relationship to disc displacement. To overcome disagreements with regard to the relationship between disc displacement and osteoarthritis of the temporomandibular joint TMJthe evidence for suggested disease mechanisms and clinical course of these disorders is reviewed.
The TMJ behaves as a complex organ in which biochemical and. Modified mandibular splint therapy for temporomandbular displacement with reduction of the temporomandibular joint. Occlusal splints are a standard method to treat disc displacement with reduction articulacikn the temporomandibular joint TMJ. They can be classified into three major groups on the basis of function: The aim of this paper is to introduce a modified mandibular splint, the Kaohsuing Medical University splint, and disfuncioj associated treatment regimen for management of disc displacement with reduction of the TMJ.
Temporomandibular joint arthrocentesis for internal derangement with disc displacement without reduction. Temporomandibular joint TMJ disc derangement is defined as a malpositioning of the articular disc relative to the condyle and eminence.
Arthrocentesis of the TMJ is a minimally invasive chair side procedure for the patients with TMJ internal derangement. This case report presents convincing results to keep arthrocentesis as an imperative procedure to relieve such patients of their acute symptoms.
TMJ dynamics has also been discussed for an in-depth understanding of the pathology in cases with internal derangement. Correlation between direction and severity of temporomandibular joint disc displacement and reduction ability during mouth opening.
The most common temporomandibular joint TMJ internal derangement is an abnormal relationship of the disc with respect to the mandibular condyle, articular eminence and glenoid fossa- disc displacement. Multisection analysis of all MR images allows distinguishing the correct disc position from disc displacement and can improve the ability to distinguish between various stages of TMJ internal derangement.
It is related to joint noise, pain, mandibular dysfunction, degenerative change and osteoarthritis. In the mean time, the pathological changes were found in synovial membrane and synovial fluid. Hyaluronic acid is a principal component of the synovial fluid which plays an important role in nutrition, lubrication, anti-inflammation and cartilage repair. The synthesis, molecule weight, and concentration of hyaluronic acid are disfunciob during TMD and cause TMJ degenerative changes.
The clinical conditions, pathological changes, the mechanism of action for hyaluronic acid and the treatment of anterior disc displacement of TMJ are discussed in this article. Histochemistry for studying structure and function of the articular disc of the human temporomandibular temporomanxibular.
Directory of Open Access Journals Sweden. Full Text Available The articular disc of the temporomandibular joint TMJ is composed of fibrocartilage, and the extracellular matrix of this disc is composed mainly of collagen, glycosaminoglycan and proteoglycans. Research on the changes that occur in the composition of the articular disc of the TMJ is necessary for understanding the basis of the pathological process of internal derangement ID, and temporomanribular number of reports have been published in recent years on the application of refined histochemical techniques to investigate the structure and function of the TMJ.
The direction of future TMJ disc studies should be towards obtaining more evidence to support previous results, and should hopefully be of practical use in terms of prevention and cure of ID. Effect of chewing upon disc reduction in the temporomandibular joint.
To test whether an intensive chewing exercise influences the moment of disc reduction in subjects with or without reports of intermittent locking of the jaw.
This experimental study included 15 subjects with a reducing anteriorly displaced disc ADD and with symptoms of intermittent. Full Text Available Occlusal splints are a standard method to treat disc displacement with reduction of the temporomandibular joint TMJ. The key points for fabrication of the KMU splint include the occlusal surface of the mandibular splint must be indented and average bite elevation 1.
The patient should wear it 24 hours a day for the first 4 weeks, then wear it while eating and sleeping for the next 2 weeks, and wear it only while sleeping for the last 2 weeks.
Patients must understand that the success of treatment depends on their compliance with the regimen. To quantify MR properties of discs from cadaveric human temporomandibular joints TMJ using quantitative conventional and ultrashort time-to-echo magnetic resonance imaging UTE MRI techniques and to corroborate regional variation in the MR properties with that of biomechanical indentation stiffness.
This study was exempt from the institutional artivulacion board approval. The discs were then subjected to biomechanical indentation testing, which is performed by compressing the tissue with the blunt end of a small solid cylinder.
Regional variations in MR and indentation stiffness were correlated. TMJ of a healthy volunteer was also imaged to show in vivo feasibility. With additional work, the technique may become a useful surrogate measure for loss of biomechanical integrity of TMJ discs reflecting degeneration.
Objective The effect of different oxygen tensions on the cytoskeleton remodeling of goat temporomandibular joint TMJ disc cells were investigated. Immunofluorescent staining and real-time reverse transcription-polymerase chain reaction analysis were then performed to identify actin, tubulin, and vimentin in the cultured disc cells. Results TMJ disc cells still displayed fibroblast characteristics under different oxygen levels and their cytoskeletons had regular arrangement.
MR image findings on advanced internal derangement of the disfunciin joints.
Cases of disc position changed from anterior disc displacement with reduction to without reduction. This study was designed to evaluate the suggestion that the clinical findings and MR image findings of anterior disc displacement with reduction cases could not reduce the disc displacement within the follow-up period.
We selected 26 joints without remarkable bone changes in the condylar head or glenoid fossa in which reduction disappeared during follow-up. Clinical evaluation focused on temporomandibular pain, trismus, and joint sound. MR imaging was targeted for configuration of articular discdegree of disc displacement, and condylar head position.
It is suggested that the advanced stage of internal derangement is closely associated with the degree of disc displacement. Quantification of disc displacement in internal derangement of the temporomandibular joint using magnetic resonance imaging. Many measures have been developed to determine the extent of disc displacement in internal derangements of the temporomandibular joint TMJ using magnetic resonance imaging.
The purpose of this study was to develop a quantitative method of analyzing disc position and to evaluate the positions of the disc in internal derangements of the TMJ group 1, with reduction; group 2, without reduction.
Magnetic resonance images of TMJs in 20 healthy volunteers and 55 patients with internal derangements were evaluated. The anatomical points of interest of the TMJ, including the anterior DA and posterior DP points of the discwere marked on parasagittal magnetic resonance images of the TMJ disc taken in both the closed- and the open-mouth positions.
All points were recorded using an x-y coordinate system, with reference to a referral line.
In the closed-mouth position, the DP in patients in group 1 was situated in a more-anterior direction than the DP in volunteers. The DP in group 2 was located further anterior and inferior than the DP in group 1.
However, the position of the DA did not differ between group 1 and group 2.
In conclusion, most of our results quantitatively support previously reported findings in imaging, surgical, and histopathological studies of TMJ internal derangement. We suggest that our measure of disc position of the TMJ would be useful to assess the status and response to treatment of internal derangements of the TMJ.
This paper determines the frequency of MR signs of abnormal temporomandibular joints TMJs in asymptomatic volunteers. Forty-two volunteers with 84 clinically normal TMJs were imaged in the sagittal and coronal planes with surface coil MR imaging.
Disfunción de la articulación temporomandibular: una guía práctica – Annika Isberg – Google Books
Sagittal closed and open and coronal closed views were obtained bilaterally in all volunteers. The images were classified as normal superior disk position or abnormal disk displacement of degenerative joint disease. Eighteen joints in 11 volunteers were abnormal; 12 had disk displacement with reduction and six had disk displacement without reduction, with associated degenerative joint disease in three of the six.
Asymptomatic internal derangement and degenerative joint disease occur in about one-fourth of asymptomatic volunteers.