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Fiber-optic transillumination method
30-03-2010
Fiber-optic transillumination method Fiber-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. However, in a recent experimental study, Vaarkamp et al (1997) showed that use of wave length-dependent FOTI allowed quantitative diagnosis of early enamel lesions. In an earlier study, Verdonschot et al (1991) found that FOTI was more useful than bitewing radiographs for detection of enamel lesions. In another study, Peers et al (1993) evaluated in vitro the validity and reproducibility of clinical examination, FOTI, and bitewing radiographs for the diagnosis of small approximal carious lesions. The results showed that the validity of FOTI was at least as high as that of bitewing radiographs, and both diagnostic tools were superior to unaided clinical diagnosis. Although FOTI cannot sensitively detect approximal lesions at the D1 level, it is specific, and its success compared to clinical methods at the D3 level means that FOTI should seriously be considered as an adjunct and used in situations where radiography is not appropriate or feasible. Traditionally advocated for approximal lesions in dentin, FOTI may also have some application in the diagnosis of occlusal lesions. The results to date are equivocal, but Wenzel et al (1992) showed that, compared to visual inspection and various radiographic image modalities, the FOTI method gave, on average, the most accurate diagnosis of noncavitated, occlusal carious lesions of dentin in extracted teeth.
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Comments
�����:Discoloured or Intrinsically stained teeth: It is not unoommcn for? a tooth to become discoloured. This can appear as pink, purple, yellow, or grey. Brook A. Niemiec DVM, Diplomate, American veterinary Dental College, Fellow, Academy of Veterinary Dentistry �����:AN OPEN LETTER TO GOVERNOR KATHLEEN BLANCOOffice of the GovernorAttn: Governor Kathleen Babineaux BlancoP.O. Box 94004Baton Rouge, LA 70804-9004RE: The Healing of Jena Wednesday, September 05, 2007 Dear Governor Blanco: We are encouraged by your rcotgnioien of the problem in Jena . Recognizing that there is something terribly wrong in the prosecution of these six African-American youths may be more eye-opening than Hurricane Katrina. It is not something that will simply just blow over. In your August 30 statement, you assert a condemnation of racism in any form . Wonderful! Racism in Louisiana should have disappeared many years ago. But putting your confidence in the hands of all involved parties- that they will act with fairness and in complete good faith – is not confidence equally shared by the African-American community around the nation nor, indeed, by the rest of the civilized world. This thing should have never happened. This criminal prosecution should have never gone forward, considering that it was a high school problem grown out of racial tension. On whose side is the State of Louisiana and its public school system? If justice in the state is as impartial as you alluded to in your statement, then it is the job of the governor to insure that everyone is treated fairly before the bar. We agree with your assessment: The Jena community has much healing ahead of it. But the community cannot heal itself; otherwise, the situation would have never escalated out of hand to begin with. Maybe the fact that you, at least, recognize the problem seems courageous enough. But Jena needs more than a governor with maternal instincts. Instead of urging all those citizens to come together for the common good of their community and their state , maybe you should take charge- not like in the aftermath of Katrina- but true out-front assertive leadership for the common good of the state . When a community as divided as Jena cannot solve its own problems, the governor needs to either send in the National Guards, or get up off her fanny and go to Jena and call a town hall meeting. Since September 20 is the sentencing date of young Mychal Bell and the date that thousands of people from around the world will converge on the town of Jena , this would be a politically opportune time to show the world what you are made of, as a leader. Sincerely,Eddie GriffinBlack Accused Support Group (BASG) �����:Here in Los Angeles KFI 640 AM radio ran the Jena Six story last Thursday morning (09.06.07), this was the first time I had heard any major media sttioan broadcast something about this case.On our blog we have links to the petition, and a very informative video from You Tube.The media is controled by a handful of the rich, and is either afraid or is attempting to censor the truth.As bloggers we can and will make a difference.Peace �����:Yobachi & AJ – I have seen a marked ienacrse in the mainstream media picking up of this story over the past few days … including story on CNN yesterday. I imagine that the next big opportunity is 9/20/07. I hope that Gov. Blanco uses that date to show some leadership.peace, Villager http://uxmcdid.com [url=http://myllnen.com]myllnen[/url] [link=http://umlxkjxgga.com]umlxkjxgga[/link]
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Articles for theme “caries”:
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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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29-03-2010
Conventional bitewing radiographic methodSeveral factors have contributed to the general adoption of radiographic examination as an aid to the detection and subsequent treatment of caries:1. It discloses sites inaccessible to other diagnostic methods. Radiography facilitates detection of carious lesions at an earlier, potentially reversible stage. Usually, more approximal and occlusal lesions are recorded when clinical examinations are supplemented by radiography. 2. The depth of the lesion can be evaluated and scored, eg, by the radiographic index by Grondahl et al (1977), modified from Moller and Poulsen (1973): 0 = no radiographic changes in enamel; 1 = radiographic changes in enamel; 2 = radiolucency extending to the dentinoenamel junction; 3 = radiolucency penetrating approximately halfway through dentin; and 4 = radiolucency close to the pulp.
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29-03-2010
Visual method with temporary elective tooth separation and impression of the approximal lesionTemporary elective tooth separation, complemented by a localized impression of the opened interproximal space, allows a more sensitive diagnosis of cavitation than does the purely visual separation method. This also has the advantage of providing a replica as a reference for visual monitoring of changes in size or even measurement of serial impressions (Neilson and Pitts, 1993; Seddon, 1989).
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29-03-2010
Visual method with temporary elective tooth separationThe once popular technique of temporary elective tooth separation as an aid to diagnosis of caries in approximal smooth surfaces is now regaining popularity, albeit with more humane and less traumatic methods that seem acceptable to most patients and dentists. This method permits a more definite assessment of whether radiographically detectable approximal enamel (D1, D2) and dentin lesions (D3) are cavitated (Pitts and Longbottom, 1987; Pitts and Rimmer, 1992; Rimmer and Pitts, 1990).
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