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WorksheetsDevelopment of the dentitions
Total questions: 30
Worksheet time: 30mins
Which of the following pairs of movements predominate during the post-eruptive period?
Distal and lingual.
Axial and mesial.
Distal and axial.
Axial and rotational.
Passive eruption is:
Growth in the length of the root.
Apical migration of the junctional epithelium.
Deposition of bone at the fundus.
The formation of cellular cementum.
Which of the following does not occur during the eruptive phase?
Dentin deposition.
Narrowing of apical foramen.
Increased thickness of cementum.
Enamel formation.
During the pre-eruptive phase of tooth eruption:
Cementoblasts begin to secrete cementoid.
The apical foramen is beginning to close.
The developed tooth at the bell stage lies within a crypt of bone.
The root is formed.
Which of the following occurs during the pre-eruptive stage of eruption of a tooth:
Differentiation of the stratum intermedium.
Formation of the dental sac.
Formation of stellate reticulum.
Maturation of enamel.
Active eruption of the tooth:
Begins as soon as the roots have begun to develop.
Begins when the apical cementum is deposited on the roots of the tooth.
Begins as the occlusal tip starts moving towards the occlusal plane
Continues until exposure of the cementum has occurred.
The root formation theory of eruption proposes, that eruption is due to the push of the:
Expanding pulp in the root canals against the alveolar crypt.
Elongating roots against the base of the alveolar crypt.
Elongating roots against the Hammock ligament.
Proliferating periodontal ligament.
Actual eruptive movements of tooth occur mainly in a :
Horizontal direction.
Complex pattern.
Axial direction.
Rotational direction.
Which of the following does not occur in the active phase of tooth eruption:
Organization of a periodontal ligament from the dental follicle.
Gradual separation of attachment epithelium from the enamel surface.
Root formation.
Occlusal wear.
The most likely factor responsible for tooth eruption is:
Lymphatic pressure.
The developing periodontal ligament.
Bone growth.
The growing enamel.
In the post-eruptive phase a tooth undergoes primarily:
Rotational movement.
Movements in a distal direction.
Movements in an apical direction.
Movements in an axial & mesial direction.
Histological changes occurring during the eruptive phase:
Root formation only.
Formation of the attachment apparatus only.
Dento- gingival junction appearance only.
All of the above.
During shedding which of the following is wrong:
The pulp plays an active role.
The pulp plays a passive role.
The pulp appears histologically normal till the end of the process.
The neural elements remain in the pulp until shedding is completed.
Shedding is predominantly the:
Physiologic loss of impacted teeth
Pathologic loss of non-vital primary teeth.
.Physiologic loss of permanent teeth.
Physiologic loss of primary teeth.
In children, median diastema between maxillary permanent incisors closes with the eruption of:
Maxillary permanent first premolars
Maxillary permanent lateral incisors
Maxillary permanent canines
Maxillary permanent second molars
The average "Leeway space" available in each half of the maxilla is approximately:
0.9 mm
2.9 mm
4.0 mm
6.9 mm
If a flush terminal plane is present in the deciduous dentition, then the molars will erupt:
Initially in class I occlusion
Initially in class II occlusion
Initially in class III occlusion
End to end
Which of the following can be predicted from a flush terminal plane of primary dentition ?
Always results in Class I molar relation
Always results in class II molar relation
Always results in class III molar relation
End to End molar relation
The "ugly duckling" stage of the transitional dentition is characterized by all of the following except:
Deep overbite
Distoangular axial inclination of the maxillary incisors
Mandibular lateral incisors erupting lingual to the mandibular central incisors
Possible overjet
Late mesial shift is due to:
Closure of primate spaces
Eruption of first permanent molars
Related to end on molar relation
Closure of Leeway space
Transitional phase of dentition is:
During eruption of permanent and exfoliation of deciduous teeth
After all permanent teeth have erupted
Phase during correction of malocclusion
None of the above
Ugly duckling stage affects:
Maxillary anterior teeth
Mandibular anterior teeth
Both maxillary and mandibular teeth
Cause decrease in vertical height
Good contacts in primary teeth with lack of spacing predicts:
Normal occlusion in permanent teeth
Crowding in permanent teeth
Anterior cross bite
Spaced permanent dentition
After mixed dentition stage the arch length from first molar to first molar usually:
A. Remains same
B. Increases
C. Decreases
D. Doubles
Which of the following is a self correcting anomaly ?
Ugly Duckling stage
Deep bite
Retrusion
Protrusion
Leeway space of Nance is utilized in:
Early mesial shift of first permanent molars
Incisal liability
Late mesial shift of first permanent molars
Secondary spacing of first permanent molars
Difference in width of permanent and primary incisors is:
Incisal guidance
Incisal inclination
Overjet
Incisal liability
The average Leeway Space available in each half of mandible is:
3.8 mm
1.7 mm
2.4 mm
0.9 mm
Ugly duckling stage of dentition in children is corrected by eruption of which permanent tooth ?
Central incisor
Lateral Incisor
Canine
Second molar
Ugly duckling stage coincides with which transitional phase:
1st transitional phase
Inter transitional
2nd transitional
All of the above
