Week 3 Spacing and Diastemas Flashcards
Crowding problems are often associated with _________
Class I problems
True or False?
People with ideal max arches tend to get little more crowded as they get older.
True
True or False?
Hispanics have more Max/Mand irregularity compared to White and African Americans
True
Tanaka Johnston Space Analysis
The prediction of the size of the unerupted canines and the premolars in contemporary orthodontic population can be done with this analysis
For max arch: Y = 11 + 0.5 (X)
For mand arch: Y = 10.5 + 0.5 (X)
X = Sum of mesio-distal widths of the lower incisors
True or False?
If the patient is very protrusive, increasing the arch dimensions is ok.
False
If the patient is very protrusive, to increase the arch dimensions is not advisable because you will make it more protrusive
True or False?
If the patient is retrusive, it is okay to increase the arch dimensions to move the teeth facially
True
Excess space: usually no treatment unless…
Esthetics / Trauma (spacing and protrusion)
Eruption problems
Pathology
Oral habits
True or False
Many times the diastema closes spontaneously when the canines erupt.
True
Generalized spacing is caused by:
very large arches or very small teeth
Excess space treatment (spacing and protrusion)?
Fixed appliances: archwire
Removable appliances: W/ labial bow: can tip the upper teeth lingually
Looped arch wire vs. Labial Bow
Looped arch wire - Bracket and tube, 2 point contact, anchorage: molar teeth, bracket: bodily movement, retention: brackets and bands
Labial Bow: one point contact, round wire is used, tipping movement, retention: adam’s clasps, anchorage: teeth
True or False?
Max midline diastemas over 2mm will reduce considerably as primary anterior teeth are erupting to close the space
True
It reduces by a lot after 8-11 yo
Max midline diastema over 2mm are mostly seen in ________
African Americans
Excess space (diastemas) associated problems include:
supernumerary teeth: once removed, appliance can be placed to close the space to allow other teeth to erupt
missing teeth: spacing by missing certain teeth
Frenums: do not treat the frenum until after we have closed the space to see if it is going to be a retention problem.
Idiopathic
True or False?
Just looking at the morphology of frenum is a poor way to diagnose.
True
