Midterm 1: Operator positions and fissure sealants Flashcards
How should your chair be tilted?
Upwards to the floor
What is proper patient positioning for the maxillary arch?
Chair positioned horizontal to the floor
Maxillary arch perpendicular to the floor
Patient’s head turned to right or left
What is the supine patient position?
Parallel with the floor
What is the semi-supine patient position?
Torso is slightly lifted to form a 45 degree angle with the floor
What is proper patient position for the mandibular arch?
Chair tilted supwards so mandible is tilted 5-30 degrees from the floor (semi-supine)
patient’s head is turned to right or left
Head of the handpiece should be ____________ to the occlusal surface of the tooth being prepared
parallel
All preparations should be accomplished using:
- proper chair position
- handpiece grasp
- bur angulation
What is one of the most effect caries prevention modalities?
pit/fissure sealants
What is the purpose of pit and fissure sealants?
to provide hermetic seal of pits and fissures that harbor cariogenic bacteria
Pit and fissure sealants are for which teeth?
PERMANENT first and second molars
premolars
What do sealants do to the tooth?
create a smooth occlusal surface that removes the food source of bacteria
What is the purpose of etchant?
To create a rough surface for the sealant to adhere to
What are curing lights used for?
polymerization of light cured resin based composites
What light and wavelength do we use?
blue light
400-500 nm
under visible light spectrum
What is irradiance?
Intensity of the light hitting the surface measured in mw/cm2
<300 = low output
300-500 = test composite to determin curing times
500-800 = recommended curing time
>800 = high output
