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38 Cards in this Set
- Front
- Back
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What are the 4 phases of eruption?
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1. pre-eruptive
2. pre-functional eruptive 3. functional eruptive 4. passive eruption |
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Which phase of eruption is comprised of slight movements during crown formation?
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pre-eruptive
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Which phase of eruption is comprised of movement of the tooth into the oral cavity along with root formation?
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pre-functional
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During the functional eruptive phase, what causes the tooth to move further into the oral cavity?
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attrition of teeth
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T or F: During passive eruption, the tooth does not actually move?
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True
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During passive eruption, further exposure of the teeth is due to __________?
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gingival recession
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Which phase of eruption?
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pre-eruptive
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Which phase of eruption?
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pre-functional
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Which phase of eruption?
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pre-functional
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which phase of eruption?
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functional
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Which stage of eruption?
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passive
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Which stage of eruption?
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passive (canines)
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Prefunction eruption begins at ____ ____________ and ends at __________.
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root formation, occlusion
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List the 4 major events which occur during pre-functional eruption.
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1. eruptive movement
2. root formation 3. penetration 4. occlusion |
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Name two events during eruptive movement.
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1. incisial or occlusal movement through the bony crypt
2. REE fuses with oral epithelium |
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During penetration, the tooth must pierce _______________?
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REE (which is fused to oral epithelium)
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What covers the tooth after penetration and what is it made by?
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cuticle, ameloblasts
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When does the tooth stop erupting?
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when occlusal contact is reached
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Secondary teeth erupt through ____________ _____________ which are remnants of the _____________ ___________.
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gubernacular canals; dental lamina
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What is the arrow pointing to?
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gubernacular canal
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Name the two proposed mechanisms of eruption.
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1. vascular fluid pressure
2. fibroblast contraction on pdl |
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What does the REE fuse with before the tooth can enter the oral cavity?
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oral epithelium
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What does the fused oral epithelium and REE become?
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junctional and sulcular epithelium of the gingiva
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What are a-d?
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a- fused oral epithelium and REE
b- tooth penetrating into oral cavity c- REE d- oral epithelium |
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T or F: secondary teeth cause root resorption on the apical facial side of the primary root.
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False, apical lingual
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Pressure exerted on the primary tooth by the secondary tooth, stimulates ______________ activity.
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odontoclast
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As an incisor or canine moves into position, it must rotate (lingual/facial) in order to be in the correct position?
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facial or towards the lip
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T or F: molars do not erupt lingual to the primary tooth?
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True, they erupt directly underneath
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What are these cells and in what structure do the lie?
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osteoclasts in howship's lacuna
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Which portion of the primary molar root is resorbed first when pressure is exerted by the secondary tooth?
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interradicular root
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If a tooth erupts where it shouldn't, it is called ____________ _____________?
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ectopic eruption
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What is this?
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ectopic eruption
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What is this?
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ectopic eruption into the maxillary cavity
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____________ is a process where the cementum is attached directly to alveolar bone and no PDL is present.
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ankylosis
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With ankylosis, the tooth will be sub-erupted or super-erupted?
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sub
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How can you identify failure of secondary tooth eruption?
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primary teeth are still present
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What is the pathology?
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ankylosis
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What is this?
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failure of secondary teeth to erupt
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