Development of Dental Arch and Occlusion in Pedodontics

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Which type of incisors are larger than the ones they replace?

Mixed incisors

Permanent incisors (correct)

Primary incisors

Deciduous incisors

What is incisal liability?

The liability of permanent incisors to fall out

The difference between space needed for incisors and actual available space (correct)

The increased length of permanent incisors compared to deciduous

The potential damage to incisors during eruption

In which arch was the increase in intercanine width greater?

Upper arch (correct)

Both arches had equal increases

No mention of intercanine width increase

Lower arch

What happens during the intertransitional period?

No active tooth movement occurs Signup and view all the answers

What causes crowded anterior segments in dental arches?

Primary dental spacing Signup and view all the answers

What is the first lower incisor to erupt during replacement?

Lower central incisor Signup and view all the answers

Which teeth show a greater tendency to increase in width during eruption?

Lower lateral incisors Signup and view all the answers

What do regulatory factors utilize for the arrangement of permanent incisors?

Physiologic spaces in primary dentition Signup and view all the answers

What provides space to accommodate larger permanent incisors?

Increase in anterior length in dental arch Signup and view all the answers

Why do both maxillary and mandibular permanent incisors show labial inclination?

To make dental arch circumference wider Signup and view all the answers

During the pre-dental period, what is the typical overjet and overbite seen in a newborn?

5mm overjet and 0.5mm overbite Signup and view all the answers

What is the usual sequence of primary dentition eruption?

A-B-D-C-E Signup and view all the answers

At what age does the deciduous dentition period begin with the eruption of the first permanent molar?

6 years Signup and view all the answers

Which type of spacing is typically seen in the primary dentition?

Generalized spacing (Type I) Signup and view all the answers

What is the ideal occlusion criteria at 7 years of age?

$2mm$ anterior and posterior overjet Signup and view all the answers

During the mixed dentition period, what is the first transitional period characterized by?

Eruption and occlusion of first permanent molar Signup and view all the answers

What is the shape of the dental arch typically like during the deciduous dentition?

(U) shape with spaces between teeth Signup and view all the answers

What is the significance of terminal plane relation to deciduous molars?

'Mesial-step' terminus leads to Class II malocclusion Signup and view all the answers

'Anthropoid space' in the primary dentition is associated with:

'Physiological spacing' helpful in canine positioning Signup and view all the answers

'Proper permanent molar occlusion was achieved from straight terminal plane by a second mesial shift of molar as second primary molar are exfoliated.' This statement refers to:

'Mesial-step' terminal plane adjustment Signup and view all the answers

What is the main characteristic of the upper and lower arches during the first transitional period?

They sandwich the deciduous canines and molars. Signup and view all the answers

What is the duration of the first transitional period?

1.5 years Signup and view all the answers

During which age range does the second transitional period typically occur?

9-12 years Signup and view all the answers

What is the leeway space of Nance?

Excess space after the exchange of deciduous teeth. Signup and view all the answers

Which arch has a greater amount of leeway space according to the text?

Mandibular arch Signup and view all the answers

What contributes to dental crowding according to the text?

Deficient leeway space Signup and view all the answers

What characterizes the 'ugly duckling stage' mentioned in the text?

A transient malocclusion during eruption of permanent canines. Signup and view all the answers

What occurs with the roots of lateral incisors during the 'ugly duckling stage'?

They are displaced mesially. Signup and view all the answers

'Eruption of second permanent molar' occurs after what event according to the text?

'Exchange of canines and premolars' Signup and view all the answers

The mean increase of intercanine width was greater in ______ (3-4 mm) than in lower (2-3 mm)

upper Signup and view all the answers

In lower, the greater tendency to increase during eruption of lower lateral, whereas in upper during eruption of upper ______

central Signup and view all the answers

The spaced arch results in favorable alignment of permanent ______

incisors Signup and view all the answers

40% of arches without primary dental spacing result in crowded anterior ______

segment Signup and view all the answers

The regulatory factors controlling the arrangement of four permanent incisors utilize physiologic spaces that exist in primary ______

dentition Signup and view all the answers

Increase intercanine width and increase anterior length in dental arch will provide space to accommodate the larger permanent ______

incisor Signup and view all the answers

Both maxillary and mandibular permanent incisors show labial inclination much more than primary incisors making permanent dental arch circumference wider for arrangement of large permanent ______

incisor Signup and view all the answers

Proper permanent molar occlusion was achieved from straight terminal plane by a second mesial shift of molar as second primary molar are ______

exfoliated Signup and view all the answers

Eruption of second permanent molar occurs after what event according to the ______

text Signup and view all the answers

During the mixed dentition period, the first transitional period is characterized by both primary and permanent ______

teeth Signup and view all the answers

The alveolar ridges are plain firm tissue with no teeth on them at ______

birth Signup and view all the answers

The primary teeth begin to erupt about ______ months

6 Signup and view all the answers

The mixed dentition period begins at ______ years of age with eruption of first permanent molar

6 Signup and view all the answers

In deciduous dentition, dental arch wider and (U) shape with spaces between ______

teeth Signup and view all the answers

The relationship of the distal terminal plane of opposing second primary molar teeth can be classified into one of 3 categories: A- a flush terminal plane, B- mesial-step terminus, C- The ______ terminal plane

distal-step Signup and view all the answers

The most desirable occlusion is a class 1 ______

interdigitation Signup and view all the answers

The primary dentition remaining usually include canine and first and second molar of both ______

arches Signup and view all the answers

The other space in primary dentition are called (developmental space) play important role in development of ______ dentition

permanent Signup and view all the answers

The emergence of first permanent molar and exchange of deciduous incisor with permanent incisor occurs in the first ______ period

transitional Signup and view all the answers

Proper permanent molar occlusion was achieved from straight terminal plane by a second mesial shift of molar as second primary molar are ______

exfoliated Signup and view all the answers

The upper and lower arches consist of permanent incisors and molars that sandwich the deciduous canines and molars. This phase lasts for 1.5 years and is relatively stable. Only a few changes in morphology of deciduous teeth are seen because they undergo ______.

attrition Signup and view all the answers

Between 9-12 years of age, the second transitional period involves exfoliation of primary canines and molars in conjunction with the eruption of permanent canines, premolars, and second permanent ______.

molars Signup and view all the answers

The space available for exchange of canines and premolars is limited as the mesial surface of the first permanent molar forms its distal limit, and the distal surface of the permanent lateral incisor forms its mesial limit. This space is known as the leeway space of ______.

Nance Signup and view all the answers

The combined mesiodistal width of permanent canines and premolars is usually less than that of deciduous canines and molars. The surplus space called leeway space of Nance is utilized for mesial drift of mandibular molars to establish class I molar relation. The most favorable dental arch pattern is one in which leeway space is ______.

excessive Signup and view all the answers

The ugly duckling stage, also known as broadbond phenomenon, indicates an unesthetic appearance of the child. It is transient or self-correcting malocclusion seen in the maxillary incisors region between 8-9 years of age seen during the eruption of permanent ______.

canines Signup and view all the answers

As the permanent canines erupt, they displace the roots of the lateral incisor mesially, resulting in the transmission of force onto roots of central incisors, which are displaced mesially. A resultant distal divergence of the crown of incisors occurs, which results in the creation of ______.

diastema Signup and view all the answers

After the exchange of laterals is completed and the dental arch up to the first molar is established, the second permanent molar begins to ______.

erupt Signup and view all the answers

With the eruption of the second permanent molar, the arch circumstances may become shorter than that of the primary arch by the utilization of leeway ______.

space Signup and view all the answers

The amount of leeway space is greater in the mandibular arch than in the maxillary arch, it is about 1.8mm (0.9 mm on each side of the arch) in the maxillary arch and 3.4 mm (1.7mm on each side of the arch) in the mandibular arch. If leeway space is deficient, dental ______ result.

crowding Signup and view all the answers

The eruption of the second permanent molar occurs after the exchange of deciduous canines and molars, and the arch circumstances may become shorter than that of the primary arch by the utilization of leeway ______.

space Signup and view all the answers

Development of Dental Arch and Occlusion in Pedodontics

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Questions and Answers

Which type of incisors are larger than the ones they replace?

What is incisal liability?

In which arch was the increase in intercanine width greater?

What happens during the intertransitional period?

What causes crowded anterior segments in dental arches?

What is the first lower incisor to erupt during replacement?

Which teeth show a greater tendency to increase in width during eruption?

What do regulatory factors utilize for the arrangement of permanent incisors?

What provides space to accommodate larger permanent incisors?

Why do both maxillary and mandibular permanent incisors show labial inclination?

During the pre-dental period, what is the typical overjet and overbite seen in a newborn?

What is the usual sequence of primary dentition eruption?

At what age does the deciduous dentition period begin with the eruption of the first permanent molar?

Which type of spacing is typically seen in the primary dentition?

What is the ideal occlusion criteria at 7 years of age?

During the mixed dentition period, what is the first transitional period characterized by?

What is the shape of the dental arch typically like during the deciduous dentition?

What is the significance of terminal plane relation to deciduous molars?

'Anthropoid space' in the primary dentition is associated with:

'Proper permanent molar occlusion was achieved from straight terminal plane by a second mesial shift of molar as second primary molar are exfoliated.' This statement refers to:

What is the main characteristic of the upper and lower arches during the first transitional period?

What is the duration of the first transitional period?

During which age range does the second transitional period typically occur?

What is the leeway space of Nance?

Which arch has a greater amount of leeway space according to the text?

What contributes to dental crowding according to the text?

What characterizes the 'ugly duckling stage' mentioned in the text?

What occurs with the roots of lateral incisors during the 'ugly duckling stage'?

'Eruption of second permanent molar' occurs after what event according to the text?

The mean increase of intercanine width was greater in ______ (3-4 mm) than in lower (2-3 mm)

In lower, the greater tendency to increase during eruption of lower lateral, whereas in upper during eruption of upper ______

The spaced arch results in favorable alignment of permanent ______

40% of arches without primary dental spacing result in crowded anterior ______

The regulatory factors controlling the arrangement of four permanent incisors utilize physiologic spaces that exist in primary ______

Increase intercanine width and increase anterior length in dental arch will provide space to accommodate the larger permanent ______

Both maxillary and mandibular permanent incisors show labial inclination much more than primary incisors making permanent dental arch circumference wider for arrangement of large permanent ______

Proper permanent molar occlusion was achieved from straight terminal plane by a second mesial shift of molar as second primary molar are ______

Eruption of second permanent molar occurs after what event according to the ______

During the mixed dentition period, the first transitional period is characterized by both primary and permanent ______

The alveolar ridges are plain firm tissue with no teeth on them at ______

The primary teeth begin to erupt about ______ months

The mixed dentition period begins at ______ years of age with eruption of first permanent molar

In deciduous dentition, dental arch wider and (U) shape with spaces between ______

The relationship of the distal terminal plane of opposing second primary molar teeth can be classified into one of 3 categories: A- a flush terminal plane, B- mesial-step terminus, C- The ______ terminal plane

The most desirable occlusion is a class 1 ______

The primary dentition remaining usually include canine and first and second molar of both ______

The other space in primary dentition are called (developmental space) play important role in development of ______ dentition

The emergence of first permanent molar and exchange of deciduous incisor with permanent incisor occurs in the first ______ period

Proper permanent molar occlusion was achieved from straight terminal plane by a second mesial shift of molar as second primary molar are ______

The upper and lower arches consist of permanent incisors and molars that sandwich the deciduous canines and molars. This phase lasts for 1.5 years and is relatively stable. Only a few changes in morphology of deciduous teeth are seen because they undergo ______.

Between 9-12 years of age, the second transitional period involves exfoliation of primary canines and molars in conjunction with the eruption of permanent canines, premolars, and second permanent ______.

The space available for exchange of canines and premolars is limited as the mesial surface of the first permanent molar forms its distal limit, and the distal surface of the permanent lateral incisor forms its mesial limit. This space is known as the leeway space of ______.

The ugly duckling stage, also known as broadbond phenomenon, indicates an unesthetic appearance of the child. It is transient or self-correcting malocclusion seen in the maxillary incisors region between 8-9 years of age seen during the eruption of permanent ______.

As the permanent canines erupt, they displace the roots of the lateral incisor mesially, resulting in the transmission of force onto roots of central incisors, which are displaced mesially. A resultant distal divergence of the crown of incisors occurs, which results in the creation of ______.

After the exchange of laterals is completed and the dental arch up to the first molar is established, the second permanent molar begins to ______.

With the eruption of the second permanent molar, the arch circumstances may become shorter than that of the primary arch by the utilization of leeway ______.

The amount of leeway space is greater in the mandibular arch than in the maxillary arch, it is about 1.8mm (0.9 mm on each side of the arch) in the maxillary arch and 3.4 mm (1.7mm on each side of the arch) in the mandibular arch. If leeway space is deficient, dental ______ result.

The eruption of the second permanent molar occurs after the exchange of deciduous canines and molars, and the arch circumstances may become shorter than that of the primary arch by the utilization of leeway ______.

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