Interdisciplinary Adult Orthodontic Flashcards
what are the factors to consider in the preservation of a tooth
- endodontic condition
- periodontic condition
- restorability
- value to the occlusion
- possible role of orthodontics
what is the effect of the ferrule
- a band of dentin (1mm) between the post and the internal line of the crown
- improves prognosis dramatically and reduces the risk of root fractures
what is the selection criteria for extrusion
- crown to root ratio
- root anatomy
- amount of extrusion needed
- relevance to keep the root
- esthetic concerns
you may need a _______ until root is extruded
temporary post
orthodontic extrusion may result in:
an uneven gingival line
fiberotomies can decrease the:
extent of the lowering of the gingival crest
what is an advantage of orthodontic extrusion
it significantly reduces the amount of bone recontouring of adjacent teeth during the CCL procedure
what is the technique of bracketing for extrusion
- segmented technique: 2 to 3 brackets on each side of the tooth to extrude
- passive bracketing
- high force wire- with or without loops
- fiberotomy every 3 weeks
- acceptable temporary crown
how is rapid extrusion done
- heavy force
- 0.017x0.025 beta titanium rectangular wire with bends to place large extrusive forces
- activate wire 1mm every 3 weeksw
what is the goal in rapid extrusion
to extrude the tooth while maintaining the alveolar level
how often are fiberotomies done and why
every 2-3 weeks
- minimize the descent of the alveolar bone
- severing the supracrestal fibers reducing the effect on the alveolar bone
when does stabilization occcur and what does it do
- 8 weeks post final orthodontic tooth movement
- keep the appliance in a passive state
- let the gingival tissue reorganize and remodel
