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Endoscopic filtered fluorescence method
30-03-2010
Endoscopic filtered fluorescence method Pitts and Longbottom (1987) explored the use of EFF for the clinical diagnosis of carious lesions and compared results with conventional alternatives on occlusal and approximal sites. This work developed to include the use of an intraoral video system for caries detection, the prototype "videoscope." Now that commercial intraoral cameras are increasingly available in practices, this may prove to be of practical clinical importance. The EFF method has been shown to be highly sensitive for occlusal caries in enamel, but sensitivity is poor for occlusal caries in dentin (D3) (Ten Cate et al, 1996). Specificity is poor for occlusal surfaces but high for approximal lesions at both thresholds. The method is reasonably good at detecting approximal lesions in enamel but not lesions in dentin.
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Articles for theme "caries":
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30-03-2010
Alternating current impedance spectroscopy techniqueA more sophisticated approach to lesion detection and measurement is to characterize the electrical properties of the tooth and lesion by using the ACIST, which scans multiple frequencies. The ACIST is new and has been evaluated only to a limited extent on whole carious teeth. However, the results to date are extremely encouraging, indicating 100% sensitivity and specificity at the D1 level and only a marginal decrease in specificity at the D3 level (Longbottom et al, 1996).
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30-03-2010
Electrical conductance (fixed frequency) methodElectrical methods of caries diagnosis are not new. There has been recent revival of interest in fixed frequency electrical devices, which show considerable promise for detection of occlusal and approximal lesions. A device is now commercially available in The Netherlands; similar machines were produced in the United States and in Japan some years ago. The electrical detection methods are seen by many as having the greatest potential for significantly improving diagnostic performance in the years to come.
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30-03-2010
Fiber-optic transillumination methodFiber-optic transillumination is a development of a classic diagnostic aid, advocated some 20 years ago, which has never gained wide acceptance. However, it should be a regularly used tool for diagnosis of caries, in the incisor and premolar regions at least, to supplement clinical examination and bitewing radiographs. Fiber-optic transillumination has enjoyed variable success in studies evaluating its performance, possibly because of failure to appreciate that the technique, like any other, requires an extended learning phase.
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30-03-2010
Computer-aided radiographic methodComputer-aided radiographic methods exploit the measurement potential of computers in assessing and recording lesion size. In the new Trophy 97 system an artificial intelligence software (Logicon Caries Detector) is integrated: Approximal carious lesions are diagnosed and evaluated with the aid of a unique histologic database, allowing graphic visualization of the size and progression of the lesion (Figs 197a to 197c).At both the D1 and D3 thresholds, computer-aided methods offer high levels of sensitivity for approximal lesions.
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30-03-2010
Digital radiographic methodDigital, filmless, techniques for intraoral radiography have been developed for several important reasons:1. Conventional film absorbs only a few percent of the x-rays that reach it, utilizing very little of the radiation to which the patient has been exposed.2. Poor darkroom procedure can lead to both unnecessarily high doses of radiation and loss of diagnostic information.3. Development of films is time consuming, and the developer and fixing solutions are hazardous to the environment.
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