Final Flashcards
- How many teeth come from successional lamina?
20
- Speeding up permanent tooth eruption:
Extract when 2/3 of the permanent rooth is formed
- Primary lower canine is missing very early. What intervention?
Lingual arch w/ hook or maybe just hook
Primary molar size
10mm
- Mom complains her kid has 6 teeth at 14 months. Is this normal amount?
No, more teeth than normal but nothing to worry about
- Which arch has more leeway?
Mandible
- What age should a female get ortho intervention?
8-11
In caucasians, which tooth is most commonly missing
upper lateral incisor
- What percent of people have missing teeth?
3-5%
Most impacted tooth
Upper canine
Order of cognitive development
sensorimotor, preoperational, concrete, and formal
T/F chronological age is MORE important than sequence for emotional development
False
T/F In primary teeth, it is normal to have incisal edges in contact in the vertical dimension
True
Most important conditioning in dentistry?
Positive and negative reinforcement
Kid throws tantrum and ends up leaving dental office
Negative reinforcement
Growth of arch width __________ after eruption of permanent upper canine
DOES NOT CHANGE
Overbite _______ in permanent dentition
Increases
Most important structure for tooth eruption
Root
**if not root should be dental sac/follicle or crown
Primary dentin
Formed during tooth development (4um/day)
Permanent dentition of maxilla erupts _______ to primary, and mandibular erupts _______ to primary
Labial/Buccal
Lingual
Protease:
Enamelysin
Kallikrein
Late bell stage:
Dental lamina breaks and then separates the tooth from oral epithelium
When should you reduce canines in primary dentin?
Severe crowding (>5mm)
What is ankylosis?
fusion of the root of a primary tooth to the underlying bone
How do you treat ankylosis?
Monitor (for exfoliation; if not, extract)
At 9 years old, upper permanent canine appears to be mesially angled. To prevent palatal impacting you should do what?
a. Radiograph then decide after 6 months?
Funcitonal posterior crossbite
Deviated in the direction of crossbite
Crouzon syndrome:
› Premature closure of all suture
› Larger orbit
› Prognathic mandible
› All of the above
Premature closure of all sutures
Cleidocranial dysplasia
› Supernumerary teeth
› Delayed eruption
› Slow eruption
› All of the above
All of the above
Osteogenesis imperfecta:
Class 3 malocclusion
Normal skeletal relationship:
Cranial base angle is stable for life
Most common malocclusion
Class 1
Skeletal pattern that involves mandibular prognathism?
Class 3
The original angle class invovles:
› A-P dimension of the 1st molars
› Transverse
› Vertical
› All of the above
› A-P dimension of the 1st molars
First primary tooth erupts at?
6 months (5-8 months)
First permanent tooth erupts at?
6 years
Occlusal plane
Imaginary plane that passes through occlusal surfaces
T/F the primary dentition has no angulation in the transverse direction
True
What is overbite?
The vertical overlap of mandibular incisors by their maxillary antagonists
Vertical alveolar bone growth leads to arch width changes greater/smaller/same in the maxilla compared to the mandible?
Greater
a. Maxilla gets larger, mandible gets smaller
- What age should female Mandibular permanent central incisor erupt?
6-7 years
6.8 year old has big lower central incisor and tooth count reveals a missing tooth
Fusion
White coat syndrome =
Behavioral development
What dentin is formed before tooth eruption and only in the crown?
Mantle dentin
During primary to mixed dentition, maxillary permanent incisors erupt ______ to primary and mandibular permanent incisors erupt ______ to primary
Labial
Lingual
Secretory ameloblast produce proteases during enamel formation. Which of the following is not one of these proteases?
Amelogenin (also Ameloblastin, Enamelin)
When do glycosaminoglycans pull water into enamel organ?
Cap stage
What can crossbite be caused by?
› Transitory
› Skeletal
› Neuromuscular imbalance
› All of the above
All of the above
Do upper permanent canines erupt before, or after, or during eruption of 2nd premolars?
After
Occlusal plane of primary teeth is what shape?
Flat
9-year-old has a diastema between the central incisors with erupted permanent upper
lateral incisors and primary canine. What should you do?
Radiograph and decide?
Define incisor liability
Permanent incisors are larger than primary incisors
Crowding in primary dentition =
Crowding in permanent dentition
Malocclusion diagnosed in primary dentition =
malocclusion in permanent dentition
Ugly duckling stage is during what years?
8-10 y/o
What erupts first – lower or upper permanent canine?
Lower permanent canine
Which is a characteristic of primary incisors?
crowns are symmetrical
3) Intercanine distance in lower arch is expected to increase
Until 10-11 y/o
T/F Chronological age is more important than 8 ages of man?
False
T/F Lower permanent canine erupt before upper permanent canine
True
Anterior open bite:
a) Transitory
b) Skeletal origin
c) Neuromuscular imbalance
d) All of above
All of the above
Group of permanent teeth first to erupt?
Central incisors
T/F: upper primary incisor show no angulation in mesio-distal dimension
True
Once the permanent canines have erupted, the intercanine distance width:
d. Remains the same (doesn’t change after age 10-11)
Which of the following cell types are not derived from cranial neural crest?
Ameloblast
How many calcified teeth does 3-year-old have?
48 partially
24 fully calcified
erupted teeth: 20
- Down syndrome class?
a. Class III malocclusion
Which stage of tooth development do cells in the enamel organ synthesize glycosaminoglycans in the ECM?
a. Cap stage
Class II malocclusion presents:
Retrognathic mandible
Overbite in an average patient will _____
a. Be more pronounced in permanent dentition?
T/F: There is only one pathway for tooth development
False
Mom complains her kid has 6 teeth at 14 months. Is this the normal amount?
No, less teeth than normal, however nothing to worry about (normal is 8-12)
List 2 side effects of thumb sucking
a. Unfavorable skeletal patterns?
b. Ectopic dental eruption?
c. Malocclusion
d. Anterior open bite?
- List teeth that are not present (besides 3rd molars) in a 9.5 year old
a. Upper canine, both upper/lower premolars, & 2nd molars?
Characteristics of Cleidocranial Dysplasia are:
a. Poorly developed clavicle
b. Supernumerary teeth
c. Have congenital defects
A&B
What is not class III?
Increased overjet
- At 10 years old, ankylosis of the canine. To reduce potential, what should we do?
Extract
Transition from juvenile to adult are determined by
a. Development of permanent canines
What are two ways the body accommodates for incisor liability?
- Interdental space between incisors
- Maxillary permanent dentition erupts labially to primary
