Publications by authors named "A Karayiannis"

Aim: To determine the cross-sectional association of the osteoporotic status of patients with the number of their teeth, with and without taking into account age and/or smoking.

Material & Methods: At four centres, the study recruited 665 females aged 45-70 years and the number of teeth was counted for 651 subjects. Bone density was measured at the total hip, femoral neck and lumbar spine.

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Objectives: To determine the optimum X-ray spectrum in digital dental radiography once the dose around an implant and the diagnostic usefulness of the image are taken into account.

Materials And Methods: A Monte Carlo code (MCNP4B) was employed for computing the dose distribution across the bone-titanium interface. The X-ray spectra used were those met in digital dental radiography; 50-70 kVp, 2 mm Al total filtration, 5 kVp increment.

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Background: The aim of this study was to compare the diagnostic performance obtained from direct digital radiographic images (in their original form and after applying a grey-scale inversion) and conventional film in the detection of artificial peri-implant cancellous bone lesions.

Methods: Four titanium implants were placed into the cancellous bone of a dry mandible and increasingly larger bone defects were created in their approximal sites. Radiographs were taken using conventional film and a digital charge-coupled device sensor.

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Objectives: Neoadjuvant chemotherapy has been used to improve outcome after cystectomy or for selection for bladder preservation in patients with bladder cancer. We have shown encouraging results using docetaxel and cisplatin in patients with advanced urothelial cancer. We are reporting the results of a phase II study using this combination as neoadjuvant treatment in patients with muscle invasive bladder cancer.

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Purpose: Radical cystectomy represents the treatment of choice for muscle infiltrative bladder carcinoma. Adjuvant chemotherapy has been used to improve outcome after cystectomy. We report results in a prospective cohort of patients at high risk for relapse who were treated with the combination of paclitaxel and carboplatin as adjuvant treatment following cystectomy for muscle invasive bladder cancer.

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