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Biomedical subjects

Q N Anderson

Publications and source records attributed to Q N Anderson.

7 recordsLinked to original sources
PubMed2001

Pressure-pain thresholds and MRI effusions in TMJ arthralgia.

It has been suggested that MRI-depicted effusions identify patients with TMJ arthralgia. The Research Diagnostic Criteria (RDC) propose a pressure-pain threshold (PPT) of 1 pound for the identification of TMJ arthralgia. The hypotheses in this study were that: (1) there is no association between MRI-depicted effusions and TMJ arthralgia, and (2) a PPT of 1 pound does not discriminate between subjects with and those without arthralgia. Thirty females with TMJ disc displacement with reduction were divided into two groups based on the presence or absence of the self-report of TMJ pain. Bilateral TMJ PPTs and MRIs were obtained. Increasing palpation pressure from 1 to 3 pounds increased the sensitivity for identifying arthralgia from 22% to 100%, with a corresponding decrease in the specificity from 100% to 81%. The sensitivity and specificity of effusions for identifying arthralgia were 85% and 28%, respectively. These results suggest that the use of palpation pressures greater than 1 pound is a valid test for TMJ arthralgia. However, TMJ effusions lack adequate specificity for identifying TMJ arthralgia and were not associated with pain.

Adult↗
PubMed1989

The effects of temporomandibular joint internal derangement and degenerative joint disease on tomographic and arthrotomographic images.

In a blind study, 243 arthrograms were interpreted as showing normal disk position, anterior disk displacement with reduction, or anterior disk displacement without reduction. The presence or absence of a perforation of the posterior attachment or disk was recorded. Later, tomograms of the same patient were interpreted. The presence or absence of evidence of temporomandibular degenerative joint disease (TMDJD) was recorded. The condyle-to-fossa relationship was characterized as retropositioned or not retropositioned. O the 106 cases with tomographic evidence of TMDJD, 100 (94%) had arthrographic evidence of internal derangement (p less than 0.0001), whereas 47% of the cases with internal derangement (211) had evidence of TMDJD. Perforations were seen in 29 (27%) of the cases with degenerative joint disease and in none (0%) of the cases without TMDJD (p less than 0.001). In cases without TMDJD, 90% of the cases with internal derangement revealed condylar retropositioning (p less than 0.0001). With tomographic evidence of TMDJD present, the relationship between condylar position and disk position was not significant.

Arthrography↗
PubMed1989

Condylar position as a predictor of temporomandibular joint internal derangement.

Scout tomograms and arthrograms of 243 patients were separated and numbered. The location of the condyle within the fossa in the closed-mouth position was assessed by means of three evaluation techniques. Later, the arthrograms were interpreted and matched with the corresponding tomograms to evaluate the relationship between posterior displacement of the condyle and anterior displacement of the articular disk. The position of the disk within the fossa was found to be extremely variable whether disk position was normal or abnormal.

Arthrography↗
PubMed1985

Pathologic evaluation of disc dysfunction and osseous abnormalities of the temporomandibular joint.

The arthrographic findings in 141 patients with TMJ symptoms were compared with the linear tomographic evaluation to assess the incidence and severity of associated osseous abnormalities. Thirty-nine temporomandibular joints (28%) had significant osseous abnormalities compatible with degenerative joint disease. The incidence and severity of the degenerative changes compared favorably with the arthrographic assessment of the degree of soft-tissue injury. A cause-and-effect relationship between TMJ disc damage and dysfunction and degenerative arthritis is suggested.

Adolescent↗
PubMed1984

Dislocation of jaws.

Pluri-directional tomographic and arthrotomographic findings are described in six patients with dislocation of the jaw severe enough to require medical assistance. A grooved defect along the posterior aspect of the condylar head was noted in two of the six patients. The arthrotomographic findings that were obtained in one patient that was dislocated at the time of the arthrogram did not suggest a meniscocondyle incoordination as a mechanism. However, arthrotomographic findings in the six reported cases suggest that significant intra-articular soft tissue damage may result.

Adult↗
PubMed1984

Loose bodies of the temporomandibular joint: arthrographic diagnosis.

We report a series of four patients presenting with symptoms of temporomandibular joint pain and dysfunction, and manifesting calcified loose bodies within the temporomandibular joint. Tomographic and arthrotomographic findings are described. Surgical confirmation was obtained in two patients and the histopathology in one demonstrated that the loose body was calcified cartilage surrounded by synovial tissue. The synovial tissue of the joint space was normal in all four cases by arthrotomography and at surgery in two patients. The findings suggest that these cases may be examples of osteochondrosis dissecans.

Adult↗