Permanent Dentition- FINAL Retrouvey Flashcards
Tooth eruption sequence for the permanent dentition is more ____ (compared to primary)
variable
There are ___ difference with permanent tooth eruption sequence
Gender differences
Describe the gender differences in calcification of permanent dentition
Girls are ahead of boys in calcification
Describe the gender differences in the eruption pattern of permanent dentition:
girls are ahead of boys by an average of 5-6 months in the eruption pattern
The 3-4-5, 4-3-5, and 4-5-3 sequence of eruption pertains to what teeth?
lower arch canine, pm1 and pm2
What tooth has a difficult āzā pattern of eruption often resulting in impaction of the tooth in the palate?
maxillary canine
What phenomenon in seen with the canine in relation to a smaller maxillary arch:
High buccal canine
Timing of eruption is consistent between the dentitions, this means:
children who erupt primary teeth early will erupt permanent teeth early (and vice versa)
In the timing of eruption, both sides should erupt at:
the same time
Different eruption sequence explain most frequently:
crowded teeth (Maxillary cuspids and mandibular 2 bicuspids)
Impaction of what both is becoming more prevalent?
mandibular 2nd molars
If a primary tooth has a periodical abscess, this may cause:
permanent tooth to erupt quicker- but not always, it can just cause strange positioning
If the primary tooth is extracted during active eruption of permanent tooth, a root that is more than 2/3 formed will realist in:
faster eruption of permanent tooth
List two examples of local influences that quicken permanent tooth eruption:
- periapical lesions
- primary tooth extraction once root is 2/3 developed
Pulpotomies if not observed/done correctly can result in:
impacted teeth
Local influences that slow permanent tooth eruption include:
primary tooth extraction before active eruption of permanent tooth (permanent root is not 2/3 formed yet)
For mixed dentition to permanent dentition, there are dimensional changes in there:
dental arches
The dimesnional changes in the dental arches = changes in arch:
width
The direction of growth of the maxilla make the teeth move:
away from eachother
The more the mandible growth, the more___ you get.
constriction
The maxilla achieve increased arch width through:
vertical alveolar process growth
in accordance to width changes, the maxilla displays ___ growth.
divergent (wider)
Discuss what happens to the occlusal plane as the maxilla grows:
occlusal plane gets wider
Intercanine distance distance increases by roughly 4mm during what dentition stage?
mixed dentition (stops at ~10 years old)
In what arch do we actually lost some inter canine distance after ~age 10?
maxillary arch
What arch is being described?
- increases during growth spurts
- increases occur during eruption of incisors
- large increase occurs during eruption of cuspids
maxillary arch
Describe the change in intercanine width that occur in either the maxilla or mandible after eruption of permanent canines:
NO SIGNIFICANT INCREASES
Canines are responsible for brining ____ during eruption
bone
Describe the dimensional changes in dental arches: (3)
- changes are quite variable
- different for males and females
- different for maxillary and mandibular arches
What is easier to change orthodontically, the maxillary or mandibular arch dimension?
maxillary bc we can orthodontically expand it and there is more bone on the upper arch around the teeth
Expansion of the ___ arch is difficult/ impossible because there is no ___ to work with.
mandibular; bone
The growth and development of the ___ arch is not as favorable
lower arch (less room and less bone)
Factors that limit the loss of arch perimeter of the maxillary arch include: (keeping it from getting small)
- greater labial angulation of incisors
- greater increases in arch width
- smaller leeway space
In the PRIMARY dentition, the curve of spee is _____ unless ___.
flat; severe malocclusion
In the MIXED dentition, what causes the curve of spee to start to develop?
eruption of incisors and differential growth of different jaw areas, and eruption of the 2nd molars
Why do we have a curve of spee in the permanent dentition?
because the curve of spee corresponds to the dynamic movement of the mandible (condyle rotation and translation)
The permanent dentition curve of spee is influenced heavily by:
second molars (7s) and maybe incisors
Over eruption of the incisors would have what effect on the curve of spee?
steep
What are some reasons that prophylactic extraction of impacted third molars is acceptable?
- Due to later age when procedure would be done (17-18)
- easy procedure
The third molars are ___ inclined
medially
