RDA Written Test Orthodontic Procedures Questions & Answers
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RDA Written
RDA Written Test Orthodontic Procedures Questions & Answers
what are the sizes of arch wires? - ANSWERSsquare or rectangular
(positions tooth, used in final stages, applies greater force, provides stability)
round wires
(corrects crowding, levels arch, assists in gaps, used in beginning an...
RDA Written Test Orthodontic
Procedures Questions & Answers
what are the sizes of arch wires? - ANSWERSsquare or rectangular
(positions tooth, used in final stages, applies greater force, provides stability)
round wires
(corrects crowding, levels arch, assists in gaps, used in beginning and middle stages)
what are the types of arch wires? - ANSWERS-opiflex
newest, no wire appearance, composite material, light force, used in initial phase of positioning teeth
-stainless steel wire
applies increased force, very stiff
provides stability, strongest
- nickel AKA Niti
flexible, useful in movement of teeth, creates movement for crowded teeth
- Beta Titanium AKA TMA
offers a combo of strength flexibility and memory
what is the most important part of the fixed appliance? - ANSWERSthe arch wire, initiates and
establishes tooth movement in the arch
arch wires process - ANSWERS- dentist places pattern in arch wire
- arch wire is set in place
- after 1 month visit arch wires attempt to untwist n undo the pattern
- this is what helps teeth move in direction desired
- it places force on teeth causing discomfort
- force is necessary for movement in arches by stretching and pulling the periodontal ligaments of each
tooth
, - another month for evaluation
- new wire and pattern is placed (tightening braces)
what are the instruments, materials, and techniques to place arch wires? - ANSWERS-arch wire is placed
into middle of each bonded bracket and inserted into the edgewise tube on the band.
-arch wire is then bent towards gingiva securely locking the arch wire in place
-arch wire is trimmed with either a wire cutter or distal end cutter plier
- wire cutter- used outside of patients mouth, prior to placement
- distal end cutter - cuts and holds the trimmed end of the arch wire so it does not fall in patients throat
- howe pliers or weingart utility pliers - used to place or remove arch wire into the brackets and tubing.
- assists in sliding wire into tubing and positions wire into brackets
ligating the arch wire process - ANSWERS- after arch wire is secured in the edgewise, it must now be
ligated or tied down
- it creates the external force necessary for tooth movement forcing the pattern against the teeth
starts with the most posterior tooth on either right or left side working towards midline
what are ligature ties or elastomeric ligature ties? - ANSWERSligature ties- thin pliable wires that wrap
around each bracket to secure the arch wire in place (most preferred)
elastomeric- made from elastic or rubber and snapped like O rings, elastic is stretched over the bracket
securing arch wire (most popular)
bird beak pliers - ANSWERSaid in placement of steel separating springs
what are the instruments, materials, and techniques to ligate arch wires? - ANSWERSwire ligature
- multiple thin 0.01 gauge wires
- hemostat - to twist the wire around bracket
- tying pliers- twist the wire around bracket
- pin and ligature cutter - trim excess wire intraorally
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