Occlusal patterns and the neuro-muscular system.
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Dental Occlusion↗
Biomedical subjects
C Przetak
Publications and source records attributed to C Przetak.
[The vacuum cold casting method with a long preliminary heating period at low temperature].
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Dental Casting Technique↗
[The transverse block-key-bolt--a new retention element].
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Dentistry↗
Assessment of breast tissue changes on hormonal replacement therapy using MRI: a pilot study.
PURPOSE: The purpose of this study was to investigate, using MRI, the potential morphologic effects of hormonal replacement therapy (HRT) on breast tissue in post-menopausal women. METHOD: Five subjects were enrolled who were treated subsequently with both estrogen (2 mg/day) and a combination of estrogen (2 mg/day) and progestagen (1 mg/day). T1-weighted (TR 11 ms, TE 4.65 ms, flip angle 35 degrees, two excitations) 3D MR scans were acquired on a 1.5 T whole-body scanner before therapy and after each regimen. With use of a segmentation algorithm and histogram evaluation, parenchymal tissue/fat ratios were calculated over targeted volumes and changes were assessed. RESULTS: An increase in these ratios was observed in two subjects after receiving the combined therapy, indicating a change in parenchymal pattern, whereas no obvious changes were detected in any of the subjects during the estrogen-based therapy. CONCLUSION: MRI is able to detect and quantitate changes in breast parenchyma during HRT.
Adult↗