week 6 Lecture Objectives Flashcards
what is the only thing that affects contrast?
higher Kvp
Does mA effect contrast?
no
What is an an example of radiolucent in film?
airspace
What is an example of radiopaque in film?
enamel
What does a larger source film distance do?
lower density
What are some positive history findings where x-rays would be needed in a patient visit?
previous periodontal or endodontic treatment history of pain or trauma family history of anomalies postoperative evaluation of healing reminerilization monitoring presence of implant
What are two visual characteristics of film?
contrast and density
What is the DIRECT EFFECT of radiology on cells when ionized?
Result
Death of molecule
Molecule doesn’t function properly
Occurs infrequently
What is the indirect effect of radiology on cells?
Free radicals formed by radiolysis of water cause damage to chemicals of life in the cell
What are positive clinical signs that an x-rays is needed?
- )Clinical evidence of periodontal disease
- ) large or deep restoration
- ) Deep carious lesions
- )Malposed or clinically impacted teeth
- ) Swelling
- ) dental/facial trauma
- ) Mobility of teeth
- ) Sinus tract
- ) Clinically suspected sinus pathosis
- ) Growth abnormalities
- ) Oral involvement with systemic disease
- ) Positive neurologic findings in head of neck
- ) foreign objects
- ) Pain in TMJ
- ) facial asymetry
- ) unexplained bleeding, sensitvity, absense of teeth,
- ) Peri-implants or abutment tooth
- ) unusal eruption, tooth morphology, une
- ) clinical tooth erosion
What are white artifacts on film?
fixer chemical spots, air bubbles, and developer cut off
What are black artifacts on film?
light leak
What are the geometric characteristics of film?
sharpness, magnification, and image shape distortion
