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Questions and Answers
What is the definition of occlusion according to Ash and Ramfjord?
Which period of occlusal development occurs at birth?
What is the purpose of the lateral sulcus in the neonatal period?
How are the alveolar processes at the time of birth described?
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What does Angle define as occlusion?
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What is the development period that follows primary dentition?
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What is the shape of the upper gum pad?
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What separates the gum pad from the palate in the neonatal period?
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In the neonatal jaw relationships, what movements are mainly observed?
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When does the labial frenum usually attach to the incisive papillary region?
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What is the prevalence of natal and neonatal teeth?
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What is the characteristic of the lower gum pad?
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What is the anterior jaw relationship seen at rest in neonates?
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What is characteristic of mandibular functional movements in neonates?
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What is observed about natal and neonatal teeth at birth?
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Study Notes
Occlusion Definition and Development
- According to Ash and Ramfjord, occlusion is defined as the contact of the incising and occlusal surfaces of the maxillary and mandibular teeth.
- At birth, the period of occlusal development is characterized by a state of occlusal adaptation.
Neonatal Period Characteristics
- The lateral sulcus helps guide the mandible during suckling and swallowing in the neonatal period.
- The alveolar processes at birth are described as being composed of soft, unmineralized bone.
- The upper gum pad is shaped like a horseshoe.
- The upper gum pad is separated from the palate by a groove.
Jaw Relationships and Movements
- In the neonatal period, the main jaw movements observed are downward and forward movements, facilitating suckling and swallowing.
- The labial frenum usually attaches to the incisive papillary region at birth.
- Mandibular functional movements in neonates are characterized by strong, rhythmic contractions.
Natal and Neonatal Teeth
- The prevalence of natal and neonatal teeth is low, affecting only 1 in 2,000 to 1 in 3,000 births.
- Natal and neonatal teeth are observed to be small, poorly developed, and often loose at birth.
- The lower gum pad is characterized by a prominent, rounded shape.
- The anterior jaw relationship seen at rest in neonates is end-to-end.
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بيضو وجوهنا اخوان انتو كدها
