NEET MDS Shorts
772608
RadiologyWhich of the following helps in distinguishing an osseous neoplasm and a cyst on an X-ray: peripheral bone formation.
343145
Radiology1. Anodontia: This is the complete absence of teeth. It is a rare condition
where an individual fails to develop any teeth.
2. Oligodontia: This term is used when an individual has fewer teeth than the
typical dental formula, which is six incisors, two canines, two premolars, and
six molars in the permanent dentition (excluding the third molars or wisdom
teeth). The term "hypodontia" is often used synonymously with oligodontia, but
hypodontia can also refer to a broader range of conditions characterized by the
congenital absence of one or more teeth, whereas oligodontia is more
specifically the absence of six or more teeth.
3. Microdontia: This condition involves teeth that are smaller than normal. It
can affect either the primary or permanent dentition and may involve one tooth
or multiple teeth.
4. Dens in dente: This is a rare developmental anomaly where a tooth forms
within the dental crown of another tooth, typically in the form of a small
tooth-like structure. It is not a condition of tooth number but rather an
abnormality of tooth structure.
160266
RadiologyThe first step in developing radiographic film is to ensure that the developing solution is well-mixed and at the correct temperature, which is achieved by stirring the solution (option 1). This ensures uniformity in the chemical reaction that will occur during the development process.
Washing the film (option 2) occurs after development to remove excess chemicals, while dipping in developer (option 3) is the actual step that follows stirring. Dipping in fixer (option 4) is the final step to stabilize the image.
508846
RadiologyThe radiographic view that has to be avoided in patients with cervical spondylitis is Submentovertex.
584159
RadiologyRadiographic detection of carious lesions or dentinal destruction typically requires a certain threshold of loss of tooth structure. Studies have shown that a loss of approximately 40 microns of dentin is necessary for a radiograph to show evidence of carious lesions.
362326
RadiologyExplanation: Cervical burnout is an optical illusion that occurs on dental radiographs, where the area around the cementoenamel junction appears darker due to the difference in density between the enamel and the underlying dentin. This can lead to misinterpretation as caries.
122754
RadiologyThe kVp setting that produces the greatest contrast in a radiograph image is 70 kVp.
395098
RadiologyRadiographic evidence of cortical bone loss typically becomes apparent when at least 13% of the bone height has been lost. This is because the density of the bone and the surrounding structures needs to be significantly altered to be detectable on an X-ray film.