Quantitative assessment of isotope activity in the temporomandibular joint regions as a means of assessing unilateral condylar hypertrophy

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Abstract

The uptake of radioisotope in the temporomandibular joints of normal subjects was quantified to act as baseline in studies of unilateral condylar hyperplasia. Any difference in activity between the right and left sides greater than 10% appears to be significant.

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Cited by (43)

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    Orthognathic surgery with or without condylectomy is commonly considered for treatment of HH, which is indicated through abnormal imaging manifestations and bone scan findings. A previous study suggested that a relative percentage uptake of 55% or greater in the affected condyle indicates an active one and thus warrants condylectomy.30 In our study, 99mTc scintigraphy of both condyles was performed in all patients before surgery, and condylectomy was indicated when the uptake ratio between the affected and normal condyles was greater than 1.2, which was in accordance with the viewpoint of Pogrel.30

  • SPECT bone scintigraphy for the assessment of condylar growth activity in mandibular asymmetry: is it accurate?

    2018, International Journal of Oral and Maxillofacial Surgery
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    A difference in scan values of 0.34 ± 0.40 (mean ± standard deviation (SD)) between the active and inactive condyles was considered to indicate active growth. The second method was the uptake ratio, i.e. (active/inactive) × 100%5,16,26, in which the ratio of the active condylar count against the inactive condylar count was calculated as a percentage. Growth was considered to be active if the percentage was more than 10%, and vice versa.

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Assistant Professor, Division of Oral and Maxillofacial Surgery.

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