Exposure And Tecnique Errors

Question 1

Film exposed to light
Appearance
Cause
Correction

Answer 1

• Image appears black
• Film was accidentally exposed to white light
• don’t unwrap under white light, check darkroom for white leaks. Unwrap the film in darkroom

Question 2

Overexposed receptor
Appearance
Cause
Correction

Answer 2

• dark
• excessive exposure time from radiation, kilovoltage, or milliamperage
• check exposure time

Question 3

Underexposed receptor
Appearance
Cause
Correction

Answer 3

• light
• inadequate exposure time kilovoltage or milliamperage
• check receptor time, increase exposure time

Question 4

Incorrect receptor placement
Appearance
Cause
Correction

Answer 4

• no apices are seen
• not positioned correctly (Errors occur in the bisecting technique/paralleling)
• make sure 1/8th of an inch of receptor edge extends beyond the incisal-occlusal surfaces of the teeth

Question 5

Incorrect horizontal angulation
Appearance
Cause
Correction

Answer 5

• overlap contacts of the teeth
• central Ray wasn’t directed through the Interproximal spaces
• direct the x Ray beam through the Interproximal regions

Question 6

Incorrect vertical angulation
Appearance
Cause
Correction

Answer 6

• teeth appear short with blunted roots on the image
• was excessive(too steep) foreshortening occurs or elongation insufficient
• to not excessive, use adequate vertical angulation

Question 7

Cone cut with beam alignment device
Appearance
Cause
Correction

Answer 7

• A clear (unexposed) area is seen
• PID was not properly aligned with periapical beam alignment
• X-Ray beam is centered over the receptor

Question 8

Unexposed receptor:
Appearance
Cause
Correction

Answer 8

• Clear
• Failure to turn on x-Ray machine, electrical failure, machine malfunction
• x Ray machine is turned on listen for the audible exposure signal