A comprehensive in vitro study of image accuracy and quality for periodontal diagnosis. PART 1: The influence of X-ray generator on periodontal measurements using conventional and digital receptors
- نوع فایل : کتاب
- زبان : انگلیسی
- مؤلف : Bart Vandenberghe & Livia Corpas & Hilde Bosmans & Jie Yang & Reinhilde Jacobs
- چاپ و سال / کشور: 2010
Description
The aim of this study was the determination of image accuracy and quality for periodontal diagnosis using various X-ray generators with conventional and digital radiographs. Thirty-one in vitro periodontal defects were evaluated on intraoral conventional (E-, F/E-speed) and digital images (three indirect, two direct sensors). Standardised radiographs were made with an alternating current (AC), a high-frequency (HF) and a direct current (DC) X-ray unit at rising exposure times (20–160 ms with 20-ms interval) with a constant kVof 70. Three observers assessed bone levels for comparison to the gold standard. Lamina dura, contrast, trabecularisation, crater and furcation involvements were evaluated. Irrespective X-ray generator-type, measurement deviations increased at higher exposure times for solid-state, but decreased for photostimulable storage phosphor (PSP) systems. Accuracy for HF or DC was significantly higher than AC (p<0.0001), especially at low exposure times. At 0.5- to 1-mm clinical deviation, 27–53% and 32–55% dose savings were demonstrated when using HF or DC generators compared to AC, but only for PSP. No savings were found for solid-state sensors, indicating their higher sensitivity. The use of digital sensors compared to film allowed 15–90% dose savings using the AC tube, whilst solid-state sensors allowed approximately 50% savings compared to PSP, depending on tube type and threshold level.. Accuracy of periodontal diagnosis increases when using HF or DC generators and/or digital receptors with adequate diagnostic information at lower exposure times
Clin Oral Invest (2011) 15:537–549 DOI 10.1007/s00784-010-0416- Received: 20 August 2009 / Accepted: 14 April 2010 / Published online: 5 May 2010
