RADIOLOGY Final Exam Questions and answers
well illustrated Best Grade A+ Latest Versions
2025
what's physiologic resorption
A process seen with the normal shedding of primary teeth
Describe and identify the appearance of crown and root
fractures as viewed on a dental image
Unilocular lesion, noncorticated borders
• The lesion does not exhibit a thin radiopaque rim of
bone at the periphery.
• The periphery appears fuzzy or poorly defined
what is pathologic resorptions
A regressive alteration of tooth structure observed when
a tooth is subjected to abnormal stimuli
,• External resorption
• Internal resorption
Periodontal abscess
- Definition: Localized pus accumulation around the apex
of a nonvital tooth.
- Acute: Painful, sensitive to pressure, percussion, and
heat; may not appear on dental images.
- Chronic: Usually asymptomatic; pus drains through bone
or periodontal ligament space; appears as a round or
ovoid apical radiolucency.
Detection of dental conditions necessitates both clinical
and radiographic examination.
Clinical examination offers insights into soft tissue
condition.
Radiographic examination provides information about
bone health.
Dental radiographs reveal patterns, distribution, and
severity of bone loss.
what technique for imaging periodontal diseased and why?
The paralleling technique is the preferred periapical
exposure method for demonstrating anatomic features of
periodontal disease
,characteristics of healthy bone
alveolar crest of 1.5-2.0mm
PDL:thin radiolucent thin around the tooth and
Lamina Dura:DENSE RAIDOPAQUE LINE
Grade 1 - Mild Periodontitis:
Probing depths typically ranging from 4 to 5 mm.
Clinical attachment loss of 1 to 2 mm.
Minimal bone loss, usually not visible on radiographs.
Possible presence of horizontal bone loss, which may
appear as a slight reduction in bone density around the
affected teeth on radiographs
Grade 2 - Moderate Periodontitis
Probing depths ranging from 5 to 6 mm.
Clinical attachment loss of 3 to 4 mm.
Moderate bone loss evident on radiographs, usually
presenting as vertical defects or furcation involvement.
Radiographic appearance may show vertical bone loss,
furcation involvement, or widening of periodontal
ligament space.
Grade 3 - Severe Periodontitis:
, Probing depths exceeding 6 mm.
Clinical attachment loss of 5 mm or more.
Extensive bone loss visible on radiographs, including
significant vertical defects, furcation involvement, or even
tooth root exposure.
Radiographic appearance may show severe vertical bone
loss, extensive furcation involvement, and pronounced
widening of periodontal ligament space
what does calculus look on a radiograph
Ringlike opacity
• Nodular image projection
• Smooth opacity on a root surface
white and irregular
what are film composition
Base
Transparent, slight blue tint and 0.2mm thick
Adhesive
attaches the emulsion
Emulsion (doublesided)
Gelatin
Halide crystals
well illustrated Best Grade A+ Latest Versions
2025
what's physiologic resorption
A process seen with the normal shedding of primary teeth
Describe and identify the appearance of crown and root
fractures as viewed on a dental image
Unilocular lesion, noncorticated borders
• The lesion does not exhibit a thin radiopaque rim of
bone at the periphery.
• The periphery appears fuzzy or poorly defined
what is pathologic resorptions
A regressive alteration of tooth structure observed when
a tooth is subjected to abnormal stimuli
,• External resorption
• Internal resorption
Periodontal abscess
- Definition: Localized pus accumulation around the apex
of a nonvital tooth.
- Acute: Painful, sensitive to pressure, percussion, and
heat; may not appear on dental images.
- Chronic: Usually asymptomatic; pus drains through bone
or periodontal ligament space; appears as a round or
ovoid apical radiolucency.
Detection of dental conditions necessitates both clinical
and radiographic examination.
Clinical examination offers insights into soft tissue
condition.
Radiographic examination provides information about
bone health.
Dental radiographs reveal patterns, distribution, and
severity of bone loss.
what technique for imaging periodontal diseased and why?
The paralleling technique is the preferred periapical
exposure method for demonstrating anatomic features of
periodontal disease
,characteristics of healthy bone
alveolar crest of 1.5-2.0mm
PDL:thin radiolucent thin around the tooth and
Lamina Dura:DENSE RAIDOPAQUE LINE
Grade 1 - Mild Periodontitis:
Probing depths typically ranging from 4 to 5 mm.
Clinical attachment loss of 1 to 2 mm.
Minimal bone loss, usually not visible on radiographs.
Possible presence of horizontal bone loss, which may
appear as a slight reduction in bone density around the
affected teeth on radiographs
Grade 2 - Moderate Periodontitis
Probing depths ranging from 5 to 6 mm.
Clinical attachment loss of 3 to 4 mm.
Moderate bone loss evident on radiographs, usually
presenting as vertical defects or furcation involvement.
Radiographic appearance may show vertical bone loss,
furcation involvement, or widening of periodontal
ligament space.
Grade 3 - Severe Periodontitis:
, Probing depths exceeding 6 mm.
Clinical attachment loss of 5 mm or more.
Extensive bone loss visible on radiographs, including
significant vertical defects, furcation involvement, or even
tooth root exposure.
Radiographic appearance may show severe vertical bone
loss, extensive furcation involvement, and pronounced
widening of periodontal ligament space
what does calculus look on a radiograph
Ringlike opacity
• Nodular image projection
• Smooth opacity on a root surface
white and irregular
what are film composition
Base
Transparent, slight blue tint and 0.2mm thick
Adhesive
attaches the emulsion
Emulsion (doublesided)
Gelatin
Halide crystals
