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At least 433 records · Page 24Linked to original sources
PubMed2003

Synovial chondromatosis of the temporomandibular joint: long-term postoperative follow-up of the residual calcification.

Synovial chondromatosis of the temporomandibular joint is a rare disease, and extra-articular synovial condromatosis of the temporomandibular joint is even rarer. A review of the English literature from 1980 to 2000 has revealed 51 cases of synovial chondromatosis affecting the temporomandibular joint. We report a case of extra-articular synovial condromatosis, for which we carried out a long-term follow-up of the postoperative course using diagnostic images.

Adult↗
PubMed2000

Long-term evaluation following temporomandibular joint arthroscopy with lysis and lavage.

Although temporomandibular joint arthrocentesis has been utilized for almost 20 years, most papers which evaluate the success of this procedure present relatively short-term data (less than two years). The purpose of this paper is to present the longer-term condition of 22 patients who were re-examined 2 to 10.8 years after arthroscopic surgery with lysis and lavage. Assessment of symptoms reported by the patient as well as of objective signs noted on clinical examination confirms resolution of pain on movement and increased vertical opening. These findings suggest that arthroscopic surgery of the temporomandibular joint is successful in the long term for patients with painful motion.

Adult↗
PubMed1994

Temporomandibular joint structures: a comparison between anatomic and magnetic resonance findings in a coronal and an angulated coronal plane.

Two temporomandibular joints from one specimen were investigated using magnetic resonance imaging and cryosectioning. Magnetic resonance images, photography of the tissue block surface, and on-tape histologic sections were compared. The left joint was imaged and sectioned in a coronal plane, and the right joint in an angulated coronal plane parallel to the long axis of the condyle. The temporomandibular joint disc could be seen in coronal and angulated coronal scans. The posterior band was imaged in angulated coronal magnetic resonance scans throughout the temporomandibular joint both medically and laterally. In coronal scans only parts of the disc proper could be seen, depending on the level of imaging or sectioning. The densely plaited fibrous tissue of the intra-articular tissues could be seen in magnetic resonance imaging, primarily anterior to the condyle; this tissue corresponded to the low signal intensity in magnetic resonance imaging. Medical and lateral disc attachments as well as the temporomandibular joint capsule were imaged in some of the magnetic resonance scans in both the coronal and the angulated coronal scans. In diagnosing anteromedial, medial, and lateral disc displacements, angulated coronal temporomandibular joint scanning is preferred over coronal scanning.

Aged↗
PubMed2006

Magnetic resonance imaging findings of internal derangement, osteoarthrosis, effusion, and bone marrow edema before and after performance of arthrocentesis and hydraulic distension of the temporomandibular joint.

OBJECTIVES: To investigate whether temporomandibular joint (TMJ) internal derangement type III and capsulitis/synovitis are related to magnetic resonance imaging (MRI) diagnoses of internal derangement, osteoarthrosis (OA), effusion, and/or bone marrow edema (BME), and whether arthrocentesis is associated with changes in diagnoses of internal derangement, OA, effusion, and/or BME. STUDY DESIGN: The study comprised 28 patients with a clinical unilateral TMJ disorder of internal derangement type III and capsulitis/synovitis. Bilateral MRI was immediately performed preoperatively and at a 2-month follow-up. RESULTS: There was a significant relationship between TMJ internal derangement type III and capsulitis/synovitis and TMJ internal derangement (P = .000), effusion (P = .036), and BME (P = .002). MRI showed a significant decrease in diagnoses of TMJ BME ((P = .018). CONCLUSIONS: MRI variables of internal derangement, effusion, and BME were related to TMJ internal derangement type III and capsulitis/synovitis; however, arthrocentesis was only associated with a significant change in diagnoses of TMJ BME.

Adolescent↗
PubMed2004

MR of 2270 TMJs: prevalence of radiographic presence of otomastoiditis in temporomandibular joint disorders.

OBJECTIVE: The purpose of this study is to determine the prevalence of radiographic presence of otomastoiditis while examining temporomandibular joint (TMJ) disorders in magnetic resonance images (MRI) in a series of 2270 temporomandibular joint magnetic resonance images and to examine the relationship between otomastoiditis and TMJ disorders. MATERIALS AND METHODS: 2270 temporomandibular joint magnetic resonance images and patients' data were retrospectively investigated. Magnetic resonance images were obtained from the patients who referred to Osaka University Dental Hospital Outpatient Clinic with TMJ complaints for the last four years (from January 1998 to January 2003). The patients, who were diagnosed as otomastoiditis based on their temporomandibular joint magnetic resonance images, were sent to Osaka University Hospital Department of Otolaryngology for a medical consultation in order to have their pathologies certified following their MR process. Age and sex were recorded for all patients and for otomastoiditis cases; location of the disease, symptoms of patients and TMJ findings were noted as well. RESULTS: Seven patients were diagnosed as acute otomastoiditis and one patient diagnosed as chronic active otitis media with cholesteatoma in the series of 2270 MR, which were representing a prevalence of 0.39%. Neurilemoma diagnosed in left mastoid process in one patient. The final diagnoses of all patients were made after medical consultation. CONCLUSION: While examining temporomandibular joint magnetic resonance images; it is not only important to examine just the TMJ structures, but also to look at the nearby anatomical features to check evidence for inflammatory disease.

Adolescent↗
PubMed1998

Glycosaminoglycan components in temporomandibular joint synovial fluid as markers of joint pathology.

PURPOSE: This study investigated the correlation between temporomandibular joint (TMJ) disease and the composition of glycosaminoglycans (GAGs) components in the synovial fluid (SF). MATERIALS AND METHODS: Synovial fluid (SF) was obtained from 30 TMJs of 28 female patients diagnosed as having a displaced disc with reduction (WR) (seven joints), a displaced disc without reduction (WOR) (13 joints), osteoarthritis (OA) (five joints), or rheumatoid arthritis (RA) (five joints) by MR imaging and clinical examination. After the SF was directly aspirated, It was digested with chondroitinase ABC and hyaluronidase, and the concentration of unsaturated disaccharide isomers of chondroitin 6-sulfate (delta di-6S), chondroitin 4-sulfate (delta di-4S) and hyaluronic acid (delta di-HA) were measured by high-performance liquid chromatography (HPLC) combined with fluorometry. The ratio of delta di-6S or delta di-4S to delta di-HA, and delta di-6S to delta di-4S, were calculated. RESULTS: There were no significant differences in concentrations of delta di-6S, delta di-4S, or delta di-HA among the groups. The ratio of delta di-6S to delta di-4S was 2.7 +/- 1.4 in OA, 2.6 +/- 0.9 in joints with WOR, 2.9 +/- 1.2 in joints with WR, and 1.3 +/- 0.4 in RA synovial fluid. Differences in the delta di-6S: delta di-4S ratio between RA and the other conditions were statistically significant (P < .05). CONCLUSION: These results suggest that the delta di-6S:delta di-4S ratio in the synovial fluid of the TMJ reflects the proteoglycan metabolism of the joint tissues, particularly of the articular cartilage and synovial tissue. This ratio could be used to diagnose joint diseases and to predict articular cartilage destruction or synovial proliferation caused by these diseases.

Adult↗
PubMedDate not supplied

The temporomandibular joint in rheumatoid arthritis.

The temporomandibular joint (TMJ) was investigated clinically and by orthopantomography in 110 patients with rheumatoid arthritis (RA) and in 73 control subjects. Clinical symptoms in the TMJ were established in 34 per cent of the RA patients and in 18 per cent of the controls. Radiographic abnormalities were found in 60 per cent of the RA patients compared with 15 per cent in the controls. No single radiographic abnormality was characteristic of joint involvement by RA. The most common radiologic features in RA patients were changes in the morphology of the condylar head and articular eminentia, marginal irregularities, reduced mobility, and an anterior position of the condylar head. No abnormalities were encountered in the early stage of the disease, which at least in part could be attributed to the inherent limitations of orthopantomography. The incidence of joint lesions increased with duration of the RA.

Adult↗
PubMed1994

Long-term evaluation of discectomy of the temporomandibular joint.

A clinical and radiographic survey was conducted with 39 patients (39 joints) who had undergone discectomy of the temporomandibular joint between 1965 and 1974 and whose cases had been followed for an average of 20 years after surgery. There were 3 males and 36 females, ranging in age from 16 to 70 years (average, 33 years) at the time of surgery. Masticatory disorders, arthralgia, limitation of condylar movement, and trismus were the chief symptoms, and clicking and crepitus were present in six and two patients, respectively. Plain radiography showed osteoarthritic changes such as osteophyte formation or lipping on the condyles of eight joints. Arthrography showed disc perforations and peridiscal adhesions in 27 patients, and displacement of the disc in eight. All discs were totally extirpated and condylar shaves were performed in eight patients who had disorders such as osteophytes, exostoses, or lipping on the condyles. In follow-up examinations, 37 patients had no pain, but mild arthralgia was noted occasionally in two patients. Postoperatively, no patients experienced subjective masticatory disorders; 38 patients were able to open their mouth more than 35 mm, and crepitus was heard in only two joints. Plain radiography showed bony changes on the condyles and eminences of all joints. From this long-term follow-up study it is concluded that discectomy is a useful operation for treatment of severe disc pathology causing pain and functional disturbance in the temporomandibular joint.

Adolescent↗
PubMed1979

Arthritis of the temporomandibular joints.

The most common disease of the temporomandibular joint (TMJ) is osteoarthritis. Rheumatoid arthritis and psoriatic arthritis may also involve this joint. Other diseases that may occasionally affect the TMJ include familial Mediterranean fever, systemic lupus erythematosus, gout, Sjögren's syndrome and infectious arthritis. Many cases of TMJ syndrome are labeled as idiopathic facial pain syndrome, a category that probably represents a number of different entities. The role of dental malocclusion has been greatly overemphasized in the past.

Arthritis↗
PubMed1999

The role of the disk in sheep temporomandibular joint ankylosis.

OBJECTIVE: The purpose of this study was to determine the role of the disk in intraarticular ankylosis of the temporomandibular joint. STUDY DESIGN: Twelve adult sheep were divided into 2 groups. In group 1, removal of the temporal and condylar articular surfaces was performed on the right temporomandibular joint and the disk was maintained; in group 2, removal of the articular surfaces and diskectomy were performed on the right temporomandibular joint. One sheep from each group was killed just after surgery and 5 sheep from each group were killed at 3 months. The joints were examined radiologically, macroscopically, and histologically. The range of jaw movements was recorded preoperatively and at sacrifice. RESULTS: Each of 2 sheep in group 2 had lost 4% of their body weight by 3 months; all of the other sheep maintained or increased their weight. The range of jaw motion to the right was significantly lower in group 2 than in group 1 (P<.01). In group 1, fibrous repair of the articular surface and regeneration of the condylar head was seen. In group 2, each of the joints showed a total fibrous ankylosis with some calcification. There was a statistically significant difference in radiologic score between the groups (P<.0001). Histologic scores for group 1 demonstrated significantly lower scores on the degree of ankylosis scale and degree of calcification scale (P<.0001). CONCLUSIONS: This study showed that the presence of the disk prevented the development of fibrous intraarticular ankylosis of the temporomandibular joint.

Animals↗
PubMed2000

Stress-field translation in the healthy human temporomandibular joint.

Movement over the surface of the temporomandibular joint (TMJ) disc produces tractional forces. These forces potentially increase the magnitude of shear stresses and contribute to wear and fatigue of the disc. Theoretically, tractional forces in all synovial joints are the result of frictional forces, due to rubbing of the cartilage surfaces, and plowing forces, due to translation of the stress-field through the cartilage matrix as the joint surface congruency changes during motion. For plowing forces to occur in the TMJ, there must be mediolateral translation of the stress-field as the condyle moves dorsoventrally during jaw function. To test whether mediolateral stress-field translation occurs in the intact TMJ, we measured stress-field position and translation velocities in ten normal individuals during rhythmic jaw opening and closing. Magnetic resonance imaging and jaw tracking were combined to animate the three-dimensional position of the stress-field between the articulating surfaces. This allowed for mediolateral translation velocity measurements of the centroid of the stress-field. The results showed that during jaw opening and closing at 0.5 Hz, the average peak mediolateral translation velocity was 35 +/- 17 mm/sec. When opening and closing increased to 1.0 Hz, the average peak velocity was 40 +/- 19 mm/sec. Theoretical model estimates of the work done during such translation ranged from 6 to 709 mJ between the individual joints studied. The potential clinical importance of this measure is that long-term exposure of the TMJ disc to high work may result in fatigue failure of the TMJ disc.

Adult↗
PubMed1992

[The demonstration of cellular reactions in the temporomandibular condylar cartilage by NMR microscopy. The basic research for high-resolution NMR tomography of the temporomandibular joint].

The regional resolution of modern imaging methods is not good enough to clinically objectify changes to the cartilage of the temporomandibular joint, for example in functional orthodontic treatment. NMR microscopic studies of an intact temporomandibular joint preparation were done experimentally in the domestic pig on the basis of 1H-NMR relaxometric measurements in specimens of condylar cartilage. We succeeded in representing the cartilage of the temporomandibular joint down to the cellular level, and in demonstrating regeneration processes as a late sequela of surgery on the temporomandibular joint. The results are discussed with respect to their importance for future high-resolution magnetic resonance imaging of the temporomandibular joint.

Animals↗
PubMed1992

[Evaluation of digital subtraction arthrography on the diagnosis of temporomandibular joint dysfunction syndrome].

Digital subtraction arthrography of temporomandibular joint superior cavity (TMJSC-DSA) was performed for 70 cases with TMJ dysfunction syndrome. A comparative observation between the operative findings and the findings of TMJSC-DSA examination was carried out for 11 cases who underwent TMJ operation. The results showed that TMJSC-DSA could overcome the disadvantages of conventional arthrography and make exact diagnoses for the anterior displacement of the disc and the disc perforation.

Adolescent↗
PubMedDate not supplied

[Technique of X-ray computed arthro-tomography in the diagnosis of internal disorders of the temporomandibular joint].

141 patients suffering by internal derangements temporomandibular joint are surveyed with the help x-ray computed arthrotomography. The opportunity of reception of precise intra-articular elements after introduction of contrast substance allows treat results of researches with high reliability. X-ray's data received with the help CT are investigated and systematized. The features of x-ray's picture TMJ, capable to affect tactics of spent treatment, are revealed.

Adolescent↗
PubMed1985

Arthroscopy of the temporomandibular joint. An autopsy study.

Arthroscopy of the temporomandibular joint (TMJ) is evaluated on an autopsy material. 2 different types of arthroscope--one with a rod-lens system and one with a so-called Selfoc system--were used and compared regarding diagnostic accuracy. On 54 cadavers, it was found that the upper joint compartment may be punctured with accuracy and without damage to vital tissues. Landmarks on the skin facilitating clinical arthroscopy were defined in relation to a guideline from tragus to lateral canthus. A further 49 TMJ specimens were investigated with arthroscopy. The findings are in good agreement with subsequent observations made during dissection. Regarding arthrotic changes, 100% diagnostic accuracy was achieved with both types of arthroscope. Regarding remodelling changes, the diagnostic accuracy was approximately 57%. No significant difference was noticed between the 2 arthroscopes. Photographic documentation with the rod-lens arthroscope was found to be of superior quality.

Adult↗
PubMed1990

Facial skeleton remodeling due to temporomandibular joint degeneration: an imaging study of 100 patients.

One hundred patients with recently acquired, externally visible mandibular deformity and no history of previous extraarticular mandible fracture were selected for retrospective analysis. All had been investigated clinically and with radiography, tomography, and high-field surface-coil MR imaging to determine the presence or absence and extent of temporomandibular joint degeneration. Temporomandibular joint degeneration was found in either one or both joints of each patient studied. Chin deviation was always toward the smaller mandibular condyle or more diseased joint, and many patients either complained of or exhibited malocclusion, often manifested by unstable or fluctuating occlusion disturbances. Three radiologically distinct forms of degenerative vs adaptive osteocartilaginous processes--(1) osteoarthritis, (2) avascular necrosis, and (3) regressive remodeling--involving the mandibular condyle and temporal bone were identified in joints most often exhibiting meniscus derangement. Osteoarthritis and avascular necrosis of the mandibular condyle and temporal bone were generally associated with pain, mechanical joint symptoms, and occlusion disturbances. Regressive remodeling was less frequently associated with occlusion disturbances, despite remodeling of the facial skeleton, and appears to result from regional osteoporosis. Forty patients (52 joints) underwent open arthroplasty procedures, including either meniscectomy or microsurgical meniscus repair, at which time major radiologic diagnoses were confirmed. Surgical and pathologic findings included meniscus displacement, disk degeneration, synovitis, joint effusion, articular cartilage erosion, cartilage healing/fibrosis, cartilage hypertrophy, osseous sclerosis, osteophyte formation, osteochondritis dissecans, localized or extensive avascular necrosis, and decreased mandibular condyle mass and vertical dimension. We conclude that temporomandibular joint degeneration is the principal cause of both acquired facial skeleton remodeling and unstable occlusion in patients with intact dentition and without previous mandible fracture.

Adolescent↗
PubMed2001

[Analysis of the changes of temporomandibular joint under repeated +Gz stress].

Changes of temporomandibular joint (TMJ) under repeated +Gz stress were discussed. From the etiological point of view in TMJ, many papers in the fields of aviation medicine, microcirculation, maxillofacial surgery and bone surgery were reviewed. +Gz forces can cause inadequacy of blood of oxygen supply to TMJ area. This situation can be worsened by release of free radical agent and cellular factors, ischemia/reperfusion injury, and/or hemorrheologic changes. Furthermore, G-induced injury of cervical muscles and spine may break the maxillofacial muscle chain balance. In addition to the above factors, mental stress may do harm to TMJ. This paper introduced the researches on this area in an attempt to enlighten the concern about TMJ responses to increased +Gz acceleration forces.

Aerospace Medicine↗
PubMed1990

Facial skeleton remodeling due to temporomandibular joint degeneration: an imaging study of 100 patients.

One hundred patients with recently acquired, externally visible mandibular deformity and no history of previous extraarticular mandible fracture were selected for retrospective analysis. All had been investigated clinically and with radiography, tomography, and high-field surface-coil MR imaging to determine the presence or absence and extent of temporomandibular joint degeneration. Temporomandibular joint degeneration was found in either one or both joints of each patient studied. Chin deviation was always toward the smaller mandibular condyle or more diseased joint, and many patients either complained of or exhibited malocclusion, often manifested by unstable or fluctuating occlusion disturbances. Three radiologically distinct forms of degenerative vs adaptive osteocartilaginous processes--(1) osteoarthritis, (2) avascular necrosis, and (3) regressive remodeling--involving the mandibular condyle and temporal bone were identified in joints most often exhibiting meniscus derangement. Osteoarthritis and avascular necrosis of the mandibular condyle and temporal bone were generally associated with pain, mechanical joint symptoms, and occlusion disturbances. Regressive remodeling was less frequently associated with occlusion disturbances, despite remodeling of the facial skeleton, and appears to result from regional osteoporosis. Forty patients (52 joints) underwent open arthroplasty procedures, including either meniscectomy or microsurgical meniscus repair, at which time major radiologic diagnoses were confirmed. Surgical and pathologic findings included meniscus displacement, disk degeneration, synovitis, joint effusion, articular cartilage erosion, cartilage healing/fibrosis, cartilage hypertrophy, osseous sclerosis, osteophyte formation, osteochondritis dissecans, localized or extensive avascular necrosis, and decreased mandibular condyle mass and vertical dimension. We conclude that temporomandibular joint degeneration is the principal cause of both acquired facial skeleton remodeling and unstable occlusion in patients with intact dentition and without previous mandible fracture.

Adolescent↗