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Orthofinal1

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robbypowell's version from 2016-04-30 21:20

8

Question Answer
T/F: treatment stability is improved if the original arch form is maintained throughout orthodontic treatment.True
T/F: treatment stability is improved if the original arch form is changed through orthodontic treatment.False (more stable if original arch form is maintained)
what is the average tooth width?7 mm
comparing the measured tooth width to the arch space available would be _____ analysisSpace analysis
In the ___ analysis the arch perimeter is estimated by adapting a malleable brass wire to the arch from the distal contact of the second bicuspid on one side to the distal contact of the second bicuspid on the other side. Carey Analysis
_____ crowding: 3mm or less of space deficiencyMild crowding
_____ crowding: 4-6mm of space deficiencyModerate crowding
_____ crowding: >6 mm of space deficiencySevere crowding
What type of space analysis is used to assess available space on mixed dentition (using standardized norms)?Moyers Mixed space analysis (aka Michigan Mixed analysis)
Moyes mixed analysis uses measurement of what to predict what?width of 4 mandibular incisors; unerupted canines & premolars
type of analysis that uses width of 4 man incisor * 0.5 to predict the width of canines and premolars in a quadrantTanaka Johnson Mixed Space Analysis
The most common teeth responsible for creating a Bolton's discrepancyMax Lat Incisors & Man 2nd Premolars
normal bolton's ratio for man ant teeth width to max ant teeth width77.2%
A bolton's ratio greater than 77.2% would suggest a ______ excess or _____ deficiencyMandibular Excess; Maxillary Deficiency
A bolton's ratio less than 77.2% would suggest a ______ excess or _____ deficiencyMaxillary Excess; Mandibular Deficiency
Bolton's analysis is mostly analyzing what?Tooth size (comparing max to man)
When the posterior occlusion is class III in the presence of a functional shift (anterior crossbite) the relationship is often referred to as a “______ _____ ____."Pseudo Class 3
Posterior Crossbites are considered to be a problem in the _____ plane (AP, Transverse, Vertical)Transverse
Can Incisor Proclination be Evaluated from Diagnostic Models?No, must look at cephalometric analysis
The ______ analysis is used to most accurately determine the degree of incisor proclination.Cephalometric analysis
Anterior Crossbites are considered to be a problem in the _____ plane (AP, Transverse, Vertical)AP
Midline asymmetries are considered to be a problem in the ____ plane (AP, Transverse, Vertical)Transverse
studies Reported that up to ___ mm of midline deviation was judged acceptable by dentists and laypeople4mm
studies showed that up to ____ mm of midline deviation was judged acceptable by orthodontists2.2mm
If the posterior crossbite is the result of a constricted or narrow maxilla and normal width mandible (which is commonly the case), and both sides are affected the crossbite is described as a ____ ______ _____ crossbitebilateral maxillary lingual crossbite.
_____ crossbites usually involve one or two teeth; ____ crossbites usually involve the entire maxilladental; skeletal
Most posterior crossbites of skeletal origin are the result of a narrow ____ archmaxillary
in crossbite of patient under 16 yrs old, which of the arches is easiest to correct?Maxilla (b/c palatine suture does not close until 20, but 14-16 is usually considered latest for non-surgical maxillary arch expansion)
the optimal overbite (VDO) is ____ mm2-3 mm
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9 (just a sample problem list and diagnosis)

10

Question Answer
In the skeletal class ___ patient, treatment would be directed at restricting maxillary growth or enhancing mandibular growth.class 2
In the skeletal class ___ patient, treatment would be directed at encouraging maxillary forward growth or restricting mandibular growth.class 3
Headgear is used to correct skeletal class ____2
Herbst is used to correct skeletal class ____2
Reverse Pull Headgear is used to correct skeletal class ____3
Protraction face mask is used to correct skeletal class ____3
Hyrax stands for what?hygienic rapid palatal expander appliance
An appliance that changes the posture of the mandible to encourage additional mandibular growth is called a _____ appliance (general term)FUNCTIONAL appliance (ex: Herbst)
reduction of maxillary forward growth through the use of functional appliances is referred to as the ____ effectHEADGEAR effect
Theorectically additional mandibular growth at the condyle is mediated by ____ pressure on the condylar cartilage or by altered muscle tension on the condyle. (class 2 functional appliances)REDUCED pressure
In reality, the herbst appliance results mostly in correction by _____ movementTOOTH (rather than skeletal correction)
The most negative potential side effect of the HerbstMandibular Incisor proclination (also worry about anterior movement of man incisors and thinning of labial cortical bone)
Herbst appliance is usually worn for ____ to ___ months9-12 months
T/F: Herbst appliances can be used on patients with sleep apneaTRUE
in doing post-treatment analysis... which lines are red and which are black (pre/post)Pre black; Post red
Mandibular Anterior Repositioning Appliance (MARA) is similar to Herbst but less bulky and may have more negative effects on what teeth?Tipping of Molars (where it is attached)
first ever functional appliance to be used and widely accepted (note this DOES NOT result in man incisor proclination b/c of a guard on labial surface)activator
tissue-borne appliance that utilizes buccal shieldsFrankel
Headgear is most successful at affecting ____ growthMaxillary
minimal amount of time a headgear must be worn to be effective10 hours/day
amount of force applied by headgear ___ to ___ ounces12-16
There is little evidence that a restriction of mandibular growth can be accomplished with the chin cup. What does seem to occur?clockwise rotation (increasing LFH)
undesirable movements associated with use of this Reverse Pull Headgear (protraction face mask)mesial movement of the dentition and excessive vertical eruption (esp of post teeth)
Studies show that aproximately 25% to 41% of class III skeletal problems in children are the result of a ____ ____Retrusive Maxilla
Treatment with Reverse Pull Headgear should be before what age?8 yo
Reverse pull headgear is most appropriate for mild-moderate class 3 skeletal relationship... aka a deviation of ___ to ___ mm2-4 mm
In order to correct skeletal relationships without producing tooth movement... the best choice would be using _____ anchorsSKELETAL anchors (rather than dental)
Which appliance utilizes distraction osteogenesis and Le Fort osteotomy?Rigid External Distractor
Distraction Osteogenesis is performed at a rate of ___ mm per day1 mm/day
Camouflage orthodontic treatment of a skeletal class II malocclusion has classically included the extraction of what teeth followed by retraction of what teeth?Max 1st premolars; Max anteriors
Camouflage orthodontic treatment of a skeletal class III malocclusion has classically included the extraction of what teeth followed by retraction of what teeth?mandibular first bicuspids; man incisors (to improve anterior tooth relationships.)
goal of Class 3 camoflauge treatment is to place the cuspids in a class _________ relationship and leave the molars class ___.Canines, class 1; Molars Class 3
goal of Class 1 camoflauge treatment is to place the cuspids in a class _________ relationship and leave the molars class ___.Canines, class 1; Molars Class 1
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won't play in any headgear games

Question Answer
which headgear attaches to cervical part of neck?Cervical pull
Which headgear has force direction is posterior and inferiorCervical pull
which headgear attaches to straps toward top of headHigh pull
which headgear has force direction posterior and superiorHigh pull
which headgear attaches to top of head and cervical part of neck?Combi-pull
which headgear has force direction straight posterior?Combi-pull
which headgear is more appropriate for brachifacial class 2?Cervical pull
which headgear is more appropriate for dolicofacial class 2?High pull
which headgear is more appropriate for mesofacial class 2?combi-pull
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11

Question Answer
what is the total vertical height of orthodontic models?70mm
when trimming oath models what is the first surface trimmed?base of max cast (parallel with plane of occlusion)
proper amount of land area of buccal surfaces of teeth4-5mm
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12

crossbites of dental or skeletal origin
Question Answer
Usually affect only some teeth in an area of the archDental
Are less severeDental
Anterior specific and posterior specific crossbitesdental
Results from narrow maxilla or excessively wide mandibleSkeletal
crossbites of the entire archSkeletal
treated with heavier forcesSkeletal
treated with lighter forcesdental
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Question Answer
3 appliances used to treat posterior crossbitesQuad helix, W arch (Porter arch) & Schwarz appliance
Use of the Quad Helix or Schwarz will result in what type of tipping of which teeth?buccal tipping of Max molars
most common etiologic factor for non-skeletal crossbite is what?lack of space for the permanent incisors
Open anterior bites can result from what habit?finger sucking
As long as the finger sucking habit stops before the eruption of the___ ____ most of the changes resolve spontaneouslypermanent incisors
When the thumb habit ceases, the intervention appliance should be retained in place for how long?6 months
Reduction of the lower anterior facial height and lack of eruption of posterior teeth would be called a ____ bitedeep bite
what type of headgear could you use for a deep bite?cervical pull headgear
The most common location of supernumerary teethanterior maxilla
tx of Ankylosed primary tooth without permanent successorEarly extraction to avoid vertical defect
Mutations in what receptor would lead to Primary failure eruption (PFE)parathyroidhormone receptor 1 (PTHR1)
ectopic eruption of maxillary incisors results in root resorption of which tooth?Max Lat incisors
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