4. Eruption and Occlusion of the Primary Dentition Flashcards
4
What amount of the primary dentition exhibits generalized interproximal spacing? What Baume type is this?
4
What amount of primary dentition exhibits no interproximal spacing? What Baume type is this?
4
Once established at approximately _____, arches remain spaced or non-spaced over the course of primary dentition.
4
Spaced vs. non-spaced arches relate to _____ rather than tooth mass differences.
5
Where are primate spaces seen?
5
Are primate spaces common in both spaced (Baume I) and non-spaced (Baume II) in primary dentitions?
6
What are Leeway spaces?
6
Maxillary Leeway spaces are ___ mm per quadrant.
6
Mandibular Leeway spaces are ____ mm per quadrant.
7
Will there be transitional crowding in the mixed dentition with primary spacing of 3-6mm?
7
What percentage of incisor crowding is there with primary spacing that is less than 3 mm?
7
What percent of incisor crowding will there be if there is no primary spacing?
7
What percent of incisor crowding will there be if the primary teeth are crowded?
8
What determines the primary molar relationship?
8
What is the flush terminal plane?
8
What is the distal step terminal plane?
8
What is the mesial step terminal plane?
9
What is the percent incidence for the flush terminal plane?
9
What is the percent incidence for the mesial step terminal plane?
9
What is the percent incidence for the distal step terminal plane?
10
What is the normal molar relationship in the primary dentition?
10
When the first permanent molars erupt distal to the primary molars, their occlusal relationship (class I, II, III) is initially determined by what?
10
Final permanent molar relationship is the result of the cumulative effects of what three things?
11
What is early mesial shift?
11
What does early mesial shift occur due to?
11
Early mesial shift occurs at about what age?
12
What is late mesial shift?
12
What does late mesial shift often contribute to?
12
Why do mandibular permanent molars have a greater late mesial shift?
13
What is differential mandibular growth?
13
In mixed dentition, how does the differential growth of the jaws carry the mandible relative to the maxilla?
14
Distal step always leads to what?
14
Mesial step can result in what two kinds of molar occlusion?
14
Transition possibilities fro mprimary molar relationships to permanent molar relationships is usually accomplished by what measurement of the lower molar moving forward?
15
How should you start analysis of the primary canine occlusion?
15
What are the 3 classifications of primary canine occlusion?
16
Describe class I (mesial step) of where the cusp of the maxillary primary canine fits?
16
Class I mesial step canine occlusion usually results in what relationships?
17
Describe class II (distal step/end-on canines).
17
Class II (distal step/end-on canines) usually results in what relationships?
18
Describe class III (Excessive mesial step) canine occlusion.
18
What molar relationship does class III (excessive mesial step) result in?
20
What are three types of anterior radiographs?
20
What are two types of posterior radiographs?
20
What are 3 types of extra oral radiographs?
21
What should you be able to identify and outline in an anterior radiograph of the primary dentition?
21
Is it normal for permanent incisors to show overlap radiographically? Would overlap seen be a good predictor of future crowding?
22
It is important to locate and track the eruption of the ______ while the patient is in primary dentition.
23
What three things should be identified to aide in estimations of spacing issues and inform decisions about guidance of eruption?
23
If results of clinical examination show asymmetric eruption in the primary or permanent dentition, what should the clinician do?
23
What are 4 common examples that might explain why there is asymmetric eruption in the primary or permanent dentition?
24
What shape should be seen in the arches of ideal primary occlusion?
