CERVICAL BURN OUT-survey

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  • #11883
    Drsumitra
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    Registered On: 06/10/2011
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    A common finding in radiographs, almost always mistaken for caries…a survey carried out presented the following results in tendency for cervical burn out to be present on radiographs

    A retrospective analysis of 25 full mouth intra oral radiographs, including bitewing films was carried out from the hospital records of King Saud University College of Dentistry in Riyadh, Saudi Arabia, A new classification of cervical burnout (CB) based on shape was attempted. Analysis of the data revealed greater frequency of CB in maxillary teeth (67.5%) than in the mandibular teeth (32.5%). The highest frequency among maxillary teeth was in incisors (75%), while the least was in the molars (30%). In mandible, the corresponding findings was in the canines (40%) and in the molars (15.3%). Seventy per cent of CB disappeared in bitewing view in maxillary and mandibular premolars while remaining teeth showed this phenomenon in less than 50% cases. It was concluded that the frequency of CB was greater in maxillary teeth than mandibular teeth. Maxillary incisors and mandibular canines are more likely to show CB. In molars and premolars, CB present in periapical radiographs may disappear in a bitewing view.

    #17078
    sushantpatel_doc
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    Registered On: 30/11/2009
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    The factors that produce cervical burnout images in the film emulsion and Mach band effects in the retinal receptors have been discussed. In the former, overpenetration of thinner cervical tooth areas produces radiolucent areas that have rounded, diffuse inner borders, but that show intact tooth edges. Mach bands, produced by lateral inhibition of neural receptors in the eye, are optical illusions that may appear in the dentin along the proximal DEJ, or in dentinal peaks bounded by occlusal and proximal enamel. Not every observer has the same ability to perceive Mach bands, and perception is modified by projection, contour, and film and object density. A masking technique has been described to facilitate differential interpretation between the Mach apparition and actual tooth decalcification.

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