Term
| Which arch structures is affected by treacher collins syndrome? |
|
Definition
|
|
Term
| What are the symptoms of treacher collins syndrome |
|
Definition
Max/mand. hypoplasia
Abnormal TMJ
Bird-like appearance |
|
|
Term
| What does the face develop from |
|
Definition
|
|
Term
| What are the 5 facial prominences |
|
Definition
Frontonasal
2 maxillary
2 mandibular |
|
|
Term
| What are facial prominences composed of |
|
Definition
| Mesenchyme derived from neural crest cells |
|
|
Term
| Which week do facial prominences appear? |
|
Definition
|
|
Term
| What happens at week 5 to the frontonasal prominence |
|
Definition
| nasal placodes form on the side |
|
|
Term
| what divides the frontonasal prominence into medial/lateral |
|
Definition
|
|
Term
| Which direction do maxillary prominences grow |
|
Definition
|
|
Term
| What is formed when the medial nasal prominence fuses |
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
| the mandibular prominence |
|
|
Term
| What prominence forms the intermaxillary segment |
|
Definition
|
|
Term
| What does the intermaxillary prominence consist of? |
|
Definition
Philtrum
Maxilla w/ 4 incisors
Primary palate (tiny front section) |
|
|
Term
| What are the stages of the formation of the palate (inverted trap door) |
|
Definition
1) Medial walls of maxillary prominence forms palatine shelves
2) Palatine shelves directed down either side of the tongue
3) Shelves elevate to horizontal position
4) Shelves fuse at midline |
|
|
Term
|
Definition
| Failure of shelves to fuse |
|
|
Term
| Genetic cause of cleft lip? |
|
Definition
|
|
Term
| When does tooth development begin? |
|
Definition
|
|
Term
| What begins tooth development |
|
Definition
| The oral epithelium/dental lamina forms a u-shaped structure over the dental arches |
|
|
Term
| What does the dental lamina form after the u-shape |
|
Definition
| 10 processes in each arch |
|
|
Term
|
Definition
| Project down into the mesenchyme derived from neural crest cells, which condenses the mesenchyme |
|
|
Term
| What is the combined dental lamina/mesenchyme structure called |
|
Definition
|
|
Term
| What week do dental buds appear |
|
Definition
|
|
Term
| What does the dental epithelium/lamina induce |
|
Definition
| The mesenchyme to invade the dental lamina to form a dental papilla |
|
|
Term
| What does the dental lamina now do to the dental papilla |
|
Definition
| Surround to form a cap, and create an inner/outer epithelial layer with a core |
|
|
Term
| What is the core of the dental papilla called |
|
Definition
|
|
Term
| What does the inner epithelial layer of the cap form |
|
Definition
|
|
Term
| What are dental knots responsible for |
|
Definition
| The tooth morphology e.g. number of cusps |
|
|
Term
| How is the bell shape formed |
|
Definition
| The papilla invaginating further into the epithelium/lamina |
|
|
Term
|
Definition
| Mesenchyme cells adjacent to the epithelial layer |
|
|
Term
|
Definition
| The inner dental epithelium |
|
|
Term
| When does root formation begin |
|
Definition
|
|
Term
| When does the bell stage start occur |
|
Definition
|
|
Term
| Where does root formation begin |
|
Definition
| junction of inner/outer epithlium and extends downwards into mesenchyme |
|
|
Term
| What do cementoblasts form from? |
|
Definition
| Mesenchymal cells outside the tooth |
|
|
Term
| What do mesenchymal cells differentiate into outside the cement layer |
|
Definition
|
|
Term
| When do permanent tooth buds first appear? |
|
Definition
| During cap stage of primary tooth development |
|
|
Term
| What happens to the primary tooth root as the permanent tooth develops and grows |
|
Definition
| It is resorbed by osteoclasts |
|
|
Term
|
Definition
| Failure of permanent tooth buds to form in dental lamina |
|
|
Term
|
Definition
| hyperproliferation of dental lamina resulting in secondary permanent tooth buds |
|
|
