Permanent Dentition- Dr. Retrouvey (FINAL)

Question 1

The tooth eruption sequence of the permanent dentition is more _____ (compared to primary)

Answer 1

Variable

Question 2

There are _____ differences with permanent tooth eruption sequence

Answer 2

Gender differences

Question 3

Describe the gender differences in calcification of permanent dentition:

Answer 3

Girls are ahead of boys in calcification

Question 4

Describe the gender differences in the eruption pattern of permanent dentition:

Answer 4

Girls are ahead of boys by an average of 5-6 months in the eruption pattern

Question 5

3,4,5
4,3,5
4,5,3

Sequence of eruption deals with what teeth?

Answer 5

Lower arch canine, PM1, PM2

Question 6

What tooth has a difficult “Z” pattern of eruption, often resulting in impaction of the tooth in the palate?

Answer 6

Maxillary canine

Question 7

What phenomenon is seen in with canines in accordance to a smaller maxillary arch?

Answer 7

High buccal canines

Question 8

The timing of eruption is consistent between the dentitions meaning:

Answer 8

Children who erupt primary teeth early will erupt permanent teeth early (& vice versa)

Question 9

In the timing of eruption both sides should erupt at:

Answer 9

Same time

Question 10

Different eruption sequences explain most frequently:

Answer 10

Crowded teeth
(Maxillary canine) (mandibular second premolar)

Question 11

impaction of what tooth is becoming more prevalent?

Answer 11

Impaction of mandibular second molars

Question 12

If a primary tooth gas a periodical abscess this may cause:

Answer 12

Permanent tooth to erupt quicker (not always- can cause strange position instead)

Question 13

If the primary tooth is extracted during active eruption of the permanent tooth (root more than 2/3 formed) this result in:

Answer 13

Quicker eruption of permanent tooth

Question 14

List two examples of local influences that quicken permanent tooth eruption:

Answer 14

1. Periapical lesions
2. Primary tooth extraction once root is 2/3 developed

Question 15

Pulpotomies if not observed/done correctly can result in:

Answer 15

Impacted teeth

Question 16

Local influences that slow permanent tooth eruption include:

Answer 16

Primary tooth extraction before active eruption of tooth (permanent tooth root is not 2/3 formed yet)

Question 17

From mixed dentition to permanent dentition there are dimensional changes in the:

Answer 17

Dental arches

Question 18

The direction of growth for the maxilla makes the teeth move:

Answer 18

Away from each other

Question 19

The more the mandible grows, the more ____ you get

Answer 19

Constriction

Question 20

The maxilla experiences increased arch width through:

Answer 20

Vertical alveolar process growth

Question 21

In accordance to width changes, the maxilla displays _____ growth

Answer 21

Divergent

Question 22

Discuss what happens to the occlusal plane as the maxilla grows:

Answer 22

Occlusal plane gets wider

Question 23

In accordance to width changes, the mandible displays ____ growth

Answer 23

Convergent

Question 24

Intercanine distance increases by roughly 4mm during what dentition stage?

Answer 24

Mixed dentition (stops at around 10 years old)

Question 25

In what arch do we actually lose some intercanine distance after around age 10?

Answer 25

Maxillary arch

Question 26

What arch is being described? -Increases during growth spurts -Increases occur during eruption of incisors -large increase occurs during eruption of cuspids

Answer 26

Maxillary arch

Question 27

Describe the change in intercanine width that occur in either the maxilla or the mandible after the eruption of permanent canines:

Answer 27

NO SIGNIFICANT INCREASE

Question 28

Canine eruption in permanent dentition are responsible for bringing:

Answer 28

Bringing bone

Question 29

Factors that limit the loss of maxillary arch perimeter include: (keep it from getting small)

Answer 29

1. Greater labial angulation of incisors 2. Greater increases in arch width 3. Smaller leeway space

Question 30

In the PRIMARY dentition, the curve of spee is _____ unless ____

Answer 30

Flat; severe malocclusion

Question 31

In the MIXED dentition what causes the curve of spee to start to develop?

Answer 31

Eruption of incisors & differential growth of different areas of the jaw along with the eruption of second molars

Question 32

Why do we have a curve of spee in the permanent dentition?

Answer 32

It corresponds to the dynamic movement of the mandible (condyle rotation & translation)

Question 33

The permanent dentition curve of spee is heavily influenced by:

Answer 33

Second molars (7s) & maybe incisors

Question 34

Overuption of the incisors have what effect on the curve of spee?

Answer 34

Steep curve of spee

Question 35

What are some reasons that prophylactic extraction of impacted third molars is acceptable?

Answer 35

1. Later age when procedure is done (17-18) 2. Typically easy procedure 3. The tooth is mesially inclined

Question 36

The third molars are often ____ inclined

Answer 36

Mesially (against 7 & 6)

Question 37

Extraction of third molars to avoid orthodontic relapse has a weak correlation. Association vs. Correlation?

Answer 37

He would argue association -due to the curve of spee coming back (after initial ortho treatment to flatten it- this causes the lower incisors to have less room to go so they crowd) - also could be due to late growth/synthesis to develop the chin & what happens is that you lose bone at the lower incisal level which results in crowding