robbypowell's version from 2017-11-15 10:22


Follow the development of occlusion from
birth to 3 years and 3 – 6 years ; 6 -12 years
• Define and illustrate all of the terminal
plane relationships for primary molars
• Explain canine relationships in primary set
• Know normal anterior relationships in the
primary dentition: Overbite , Overjet.
• Explain spacing in the primary dentition


Question Answer
Tooth formation begins in the _____ periodFetal period (6 weeks of embryonic life)
The onset of eruption of primary teeth happens between ____ months and ____ years6 months - 2.5 years
Full primary dentition in place up until ___th year6th year
Mixed dentition is between the ages of ___ and ___6-12
Permanent dentition is normally in place by ____ years12
What is the order of eruption for primary teeth?Incisors (6-9 months), 1st molars (12-14 months), Canines (16-18 months), & Second molars (20-24 months)
Inter-digitation of the primary teeth occurs by age _____3
T/F: The primary dentition does not develop a stable cusp-fossa occlusionTrue
T/F: There is less variability seen in occlusal relationships in the primary than the permanent dentition.True
T/F: There is more variability seen in occlusal relationships in the primary than the permanent dentition.False (less variability)
T/F: The primary dentition eventually develops a stable cusp-fossa occlusionFalse (does not)
Most primary arches are _____, with few deviations from this shape.ovoid
Baume Type ____ – has spaces between the teethType 1
Baume’s study found that Baume Type ___ did not develop into crowded permanent dentitionsType 1
Baume Type ___ – has no spaces between the teeth2
Baum Type ____: 50% developed into crowded permanent dentitions.2
Baume Type 1: ___% developed into crowded permanent dentitions0%
Baume Type 2: ___% developed into crowded permanent dentitions50%
in primary dentition, mesial maxillary canine and distal to the mandibular canine are termed _____ spacesPrimate spaces
Where are the primate spaces found?Mesial to Max Canine & Distal to Man Canine
What is the average maxillary spacing in max anteriors? man anteriors?4 mm (max), 3mm (man)
T/F: Arch Circumference and arch length decrease a small amount from the time of eruption of the second primary molars until eruption of the first permanent molar.True
The average overbite of the primary dentition is _________ mm.2 mm
The average overjet in primary dentition is ___-___ mm1-2 mm
What is the most common molar relationship of primary dentition?flush terminal plane
What is the most common tooth to exhibit ankylosis?primary man 1st molar
___ step results in class 1 molar permanent occlusionmedial step
___ step results in class 2 molar permanent occlusiondistal
The four maxillary permanent incisors are, on the average, ___ mm larger than the primary incisors.7.6 mm
The four mandibular permanent incisors are ___ mm larger than the primary incisors.6.0 mm
What is the inter-canine arch width (primary) in boys? girls?Boys: 6 mm in maxilla and 4 mm in mandible; Girls: 4.5 mm in maxilla and 3 mm in mandible