Minor Tooth Movement Flashcards
How many grams are in one ounce?
28 grams = 1 ounce
What is a better term for “minor tooth movement”? What does it mean?
Isolated tooth movement
It implies that there is a limited amount of orthodontic tooth movement and that other teeth should not be moved
If the posterior permanent teeth lean inward with the crowns toward the tongue and the roots too far to th facial while the lateral overjet is minimal, then there probably is a problem with ___
Constriction of the maxillary arch (curve of Wilson problem with too much lingual crown torque)
If one were to upright the lower buccal segments, the result would be a bilateral posterior crossbite.
All permanent teeth (except the ___) are supposed to have their roots facial, or upright, compared with their tooth crowns.
Maxillary incisors (these incisors are supposed to have their roots lingual and crowns facial (lingual root torque)
(This may also occur with mandibular incisors, but it is more variable)
The common maxillary arch form is ___; however, the class 2 division 2 malocclusion can present with a ___ arch form and the class 2 division 1 can present with a __ arch form.
Ovoid
Square
Tapered
What is a Brodie bite? How is it treated?
The lower arch is completely within the maxilla
The expansion is usually done in the lower arch with a fixed appliance plus a removable bite plane in the maxillary arch that helps disarticulate the occlusion. This problem needs early treatment.
In the maxilla, it is common that the maxillary permanent second molar is too facial. because of the rhomboid shape of the permanent first molar and the lack of a vertical stop of the malposed permanent second molar, the second molar often needs to be moved ____ first, then aligned.
Distal
True or false.. one should not reduce proximal surfaces of permanent teeth in the mixed dentin in the correction of crossbite.
True
If there is a combination of a posterior and anterior crossbite, which is treated first? Why?
Posterior is treated first. If anterior is treated first, its correction will be lost when the posterior crossbite is corrected
Why is timing of treatment of a permanent incisor crossbite important?
Tipping a lingually positioned maxillary incisor facially will cause a reduction in the amount of overbite. If the overbite is too shallow initially, the teeth do not retain the corrected position as well. Therefore, it is more appropriate to treat these incisor crossbite when more overlap is present so that after the treatment is completed, the occlusion can maintain the correction.
Note that with increased overbite, there is usually a need for a bite plane to open the bite to allow easier and quicker correction of the crossbite.
There is a pseudo class 3 malocclusion that is related to the premature loss of a ____ and the shift of the permanent ___ from a class 1 molar relationship
Primary maxillary second molar
Maxillary molar
True or false… the lack of a slide from CR with a crossbite is usually a classic sign of a skeletal problem and should be referred to an orthodontist, especially if the crossbite is in conjunction with a crowding problem; a more complicated intervention is probably needed
True
How long does it typically take to correct a crossbite?
6 months. If treatment time is approaching a year and it isn’t corrected, there is a problem.
What is a major mistake that is made with orthodontic appliances to correct open bites due to digit sucking or tongue thrust?
The appliances are too close to the incisors and prevents the future lingual movement of those teeth in correction of the problem
What is the last plane of the face and occlusion to mature and truly manifest itself?
The vertical plane
