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50 Cards in this Set
- Front
- Back
tooth size and arch form are basically genetically determined T/F
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true
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the most common orthodontic problem identified by patients is what
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clinical crowding
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what is the most common accessional tooth to be congenitally absent
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3rd molars
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what is the most common successional tooth to be congenitally absent
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second premolars
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which teeth are the common causes of crossbite in preschoolers
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maxillary primary canine
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what is the expected, future posterior relationship of a distal step in malocclusion in preschoolers
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class II permanent first molar that does not self correct
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what is the most common molar relationship in a general population of children who are in the middle transitional dentition
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flush terminal plane (???)
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which maxillary arch form is most commonly associated with class II division I malocclusions
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tapered/v-shaped
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which maxillary arch form is most commonly associated with class II division II malocclusions
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square
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what is the most common arch form found in the mandibular arch
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ovoid
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what is another name for nasim-pogonion line
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facial plane
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where is the vertex for angle of convexity
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A point
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which orthodontic impression is taken first (maxillary/mandibular)
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mandibular
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what teeth are used in predicting posterior space available in the MDA
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mandibular permanent incisors
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what is the minimum amount of crowding in an arch that is needed for the arch to be called severely crowded
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7-8 mm (?)
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angle's classification is based on the permanent second molars if the permanent first molars are missing T/F
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true
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what plane of space in the occlusion or the face matures first
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transverse
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which is trimmed first with orthodontic study models
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top of base opposite the occlusal surface on the maxillary cast
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if the left side of the malocclusion is normal with the right side class II, what do you call the problem
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class II subdivision right
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where do you place the YELLOW copy of the orthodontic tx plane
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placed under the pedo tx plan on the left side of the pt chart
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which variable is associated with divergence of the profile
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facial angle
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which plane of space is effected with anterior crossbite
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sagittal
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overbite is measured in millimeters while overjet is measured in percentage T/f
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F: overbite is in percentage while overjet is in mm
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how tall are ortho models for children in the transitional dentition
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2 3/4 inches (2.75) or 70 mm
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how tall are orthodontic models for preschoolers in the primary dentition
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2 inches or 50 mm
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how many millimeters should you expect to go to a class I from a class II molar relationship
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5-7 mm (?)
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the soft tissue profile mirrors the underlying hard tissue profile T/F
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false
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what is the major difference between a young permanent dentition and one that is an adolescent dentition
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permanent second molars
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where do you find most supernumeray permanent teeth
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maxillary anterior region
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what follows inititiation and proliferation in tooth growth
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morphodifferentiation and histodifferentiation
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for /1 to Apog, where do you measure on the mandibular incisor
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perpidinicular INCISAL EDGE of the lower incisor to the A pog line
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what is the major horizontal reference line used in the Tweed Analysis
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frankfort horizontal
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which teeth are involved with cephalometric correction factor
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permanent first molars (?)
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with the MDA, which teeth that are clinically crowded must be repositioned through summation and working the change on the cast to help determine SPACE AVAILABLE
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permanent incisors (?)
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how does curve of spee correction usually effect arch length with its correction of a malocclusion
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decreases it in the mandible ( for sure decreases but not sure if it is mandible or maxilla)
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what is the centile that is usually used for the MDA
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75%
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which teeth are usually ankylosed
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primary molars
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what is the CAUSE of most crowded malocclusions
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narrow arches
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what is the eruption sequence for primary dentition
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ABCDE
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what is the eruption sequence for permanent mandibular dentition in boys
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61234758
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what is the eruption sequence for permanent maxillary dentition in boys
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61245378
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what is the eruption sequence for permanent mandibular dentition in girls
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16243578
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what is the eruption sequence for permanent maxillary dentition in girls
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61234578
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at what chronological age is deafness usually noticed
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6 months of age
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when is menarche reached on average in the US and how does this correlate to maximum facial growth
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12 years of age with maximum facial growth 6-12 months prior
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what is the age of the child or the timing for radiographic surverys
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2 panos generally indicated, one at age 5-8 when the permanent incisors are erupting, and one around age 12 to analyze canines and 2nd molars as well as 3rd molars.
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what is the value for 1 standard deviation? 2? 3?
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1 SD: 68%, 2 SD: 95%, 3 SD: 99.7%
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when is the triad of walking, walking, and toilet training usually accomplished
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2-3 years of age
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when does the sesamoid bone in the hand mineralized in relation to maximum dentofacial growth
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6months - 1 year prior to max dentofacial growth
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what are the 4 scammon curves in order of their dev't
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lymphoid, neural, genital, and general/somatic
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