Biomedical subjects
Publications and source records attributed to C P van Ooij.
92 patients, 31 with and 61 without signs of metabolic bone loss, were treated with a combined sandwich-visor osteotomy. A 5-year follow-up showed a significantly higher rate of resorption in patients with radiographic signs of metabolic bone loss. The analysis was based upon lateral cephalometry.
As an orthopantomogram provides bilateral information, it seems to be an efficient tool for screening for arthropathy of craniomandibular disorders. An experimental model was designed and constructed to resemble a human mandible. By changing the position of the model in the horizontal plane of the orthopantomograph, nine different images were analysed for changes of vertical magnifications. Emphasis was put on large parts of the mandible like the condyle. In positions that had been altered less than 10 mm from the originally centred position of the mandible in the orthopantomograph, vertical differences between the left and right sides were less than 6%. Observed condylar asymmetries within a 6% difference might, therefore, be due to technical failures.
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An analysis of 69 edentulous patients with severe atrophy of the mandible and submitted to ridge augmentation, together with 57 normal edentulous patients, revealed in about half of the patients with a severe atrophy radiological evidence of metabolic bone loss. In the group of normal edentulous patients, this was only found in post-menopausal women.
Panoramic radiographs of patients with chronic renal failure showed a loss of cortical bone at the mandibular angle; the loss of cortical bone correlated very well with the degree of renal osteodystrophy, established by biopsy of the undecalcified iliac crest. The value of using the cortical thickness at the mandibular angle as a parameter in diagnosing metabolic bone loss is discussed.
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Explore the source record for details and available documents.