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Exam (elaborations)

TCDHA RAD MIDTERM LATEST EXAM WITH COMPLETE SOLUTIONS (A+)

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TCDHA RAD MIDTERM LATEST EXAM WITH COMPLETE SOLUTIONS (A+)

Institution
TCDHA RAD
Course
TCDHA RAD











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Institution
TCDHA RAD
Course
TCDHA RAD

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Uploaded on
September 2, 2025
Number of pages
93
Written in
2025/2026
Type
Exam (elaborations)
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TCDHA RAD MIDTERM LATEST EXAM WITH
COMPLETE SOLUTIONS (A+)


xray |benefits

- DETECT |DISEASE

- minimize |& |prevent |toothaches, |surgery

- saves |time |& |money, |prevents |edentulismlosing |all |teeth



xray |use

- DETECT | diseases, | lesions, | trauma, | foreign | objects

- bone |levels |deteriorating, |evaluate |growth |& |developement



what |can |be |found |xray



missing |teeth

- may |lead |to |occlusion |problems |as |a |result |of |drifting |or |tipping

- orthodontic |treatment |in |the |absence |of |teeth |can |prevent |occlusion |problems

- conditions: |hereditary |ectodermal |dysplasia, |books |syndrome, |riegers |syndrome*



radiograph

aka |radiogram
|



a |picture |that |is, |a |visible |photographic |record |on |a |film |produced |by |the |passage |of |x-
rays |through |an |object |or |body

- can |ONLY |be |prescribed |by |DENTISTS

- should |never |be |routine/predetermined

,impacted/embedded |teeth

- MOST | COMMON | development | defects

- should |be |removed |surgerically |to |prevent |odontogenic |cyst |formation, |damage |of
|adjacent |teeth |and |bone |resorption |which |may |lead |to |fractions




impacted |tooth

- one | tooth | is | PREVENTED | FROM | ERUPTING | due | being | wedged | up
| against | a |neighbouring |tooth



- ALWAYS | necessary | to | extract

- most |common: |third |molars, |premolars, |max |cuspid |(canine), |supernumerary




embedded | tooth

- if |a |tooth |is |not |breaking |though |the |gum |because |of |being |UNDER |BONE

- tooth |is |being |blocked |by |the |gum |it |may |lack |the |force |necessary |to |break |thru |the
|gum




dental |caries

- bitewings | for | interproximal | various |lesions

- pulse |of |tooth |dies

- if |left |untreated, |can |result |in |destruction |of |a |large |amount |of |tooth |structure |and |pulp |all
|necrosis



- decay |may |recur |under |the |margins |of |existing |restorations |and |may |or |may |not |be
|seen |clinically



- black |circular |areas |on | xray

- rampant |dental |caries, | recurrent | decay, | early | root |caries



rampant |dental |caries

,recurrent |decay



early |root |caries



periodontal | disease

- disease |of |the |BONE

- CANNOT | be | diagnosed | wo | xray

- xrays |enable |to |identify |predisposing |factors |(calculus |faulty |restorations, |bony
|changes |including |furcation |involvement)



- provide |baseline |info |concerning |periodontist, |can |be |used |as |pretreatment |reference
|source




furcation |involvement

- generally |seen |in |MOLARS

- bone | has | come | down, | created | a | SPACE/HOLE | between | the | bone | and | gums



dilacerated | roots

- SHARP |BEND |of |the |roots |or |a |sharp |bend |bw |the |crown |and |root

- caused |by |some |traumatic |episode |during |tooth |formation

- produces |CHALLENGES |IF |EXTRACTION |IS |NECESSARY



retained | root | tips

- root |tips |or |fragments |are |sometimes |left |behind |following |a |complicated |tooth
|extraction



- retained |root |tips |are |usually |asympomatic

- ONLY | discovered | by | xrays

- usually |dont |require |extraction, |should |PERIODICALLY |be |re-evaluted

, periapical | lesions

- the |MOST |COMMON |radiographic |appearance |of |a |periapical |lesion |is |the
|RADIOLUCENCY |(dark) |area |at |root |apex



- a |diagnosis |of |periodical |cyst, |granuloma |or |abcesses |cant |be |made |based |on |xray
|findings |alone



other |lesions

- numerous |dental |anomalies, |cysts, |tumours |& |diseases |affect |the |jaws

- lesions |may |persist |for |years |before |signs |& |symptoms |develop

- xray |play |VITAL |role |in |the |detection

- the |importance |of |EARLY |detection |& |diagnosis |cannot |be |OVERSTATED

interpretation
|



- ablity |to |read |whats |revealed |by |an |xray

- an |EXPLANATION |of |what's |viewed

- dental |hygienist |prepares |a |preliminary |interpretation |& |presents |the |findings |to
|dentist



- dh |must |be |confident |w |the |identification |(normal |anatomy, |caries, |disease, |traumatic
|injuries, |lesions.)




diagnosis

- dh | is | RESTRICTED | by | law | from | rendering | a | diagnosis

- "TO |KNOW", |"to |DISTINGUISH"



disclosure

- the |process |of |informing |the |the |pt |about |the |particulars |of |exposing |dental |xrays

- easy |language,

- explain: |value |& |purpose, |the |client |exam: |limtiation |wo |xray



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