The gubernacular cord is a remnant of the
dental lamina
labiogingival lamina
successional lamina
reduced enamel epithelium
epithelial cuff
Which of the following are required for interosseous tooth eruption?
Intact dental follicle
Periodontal ligament
inflammatory cytokines
Intact dental follicle and periodontal ligament
All of the things
Pre-erruptive movements include
mesially, distally, occlusaly
distally, occlusally, labially
distally occlusally, lingually
mesially, lingually, occlusally
labially, lingually, occlusally
Which of the following is incorrect about permanent teeth?
incisors develop and erupt lingual to the deciduous tooth
canines develop and erupt lingual to the deciduous tooth
premolars develop and erupt between roots of deciduous molars
maxillary molars start with a mesial inclination, mandibular with a distal inclination
none of the above
Post-eruptive tooth movement includes...
Occlusal wear compensation via PDL fibroblast activity
Tipping which can lead to collapse of bite
Accommodation for vertical jaw growth and apical alveolar bone growth
Compensation at interproximal contacts which causes tendency towards midline movement
all of the choices
During active eruption, the formation and presence of oblique fibers of the PDL is the major cause of eruptive movement according to which theory of growth?
bone growth
root growth
vascular pressure
ligament traction
tissue suction
Why is the root growth theory discredited?
The root is formed before the tooth erupts
If root and alveolar bone make contact, bone will be resorbed
The root is never in contact with the floor of the alveolus
resorption and contact
all
Active eruption of a primary tooth involves all of the following except?
formation of anatomical REE becomes primary junctional epithelium
formation and organization of PDL
bone resorption and remodelling
enzymatic removal of soft tissues over the crown
degradation of gubernacular cord
Which of the following causes monocytes to fuse and become osteoclasts?
EGB
TGF-B1
CSF-1
IL-1
IL-2
Which of the following attracts monocytes and macrophages during tooth eruption?
EGF
If there is no succedaneous tooth following a deciduous tooth, what happens?
It will never be shed
It will shed and leave a hole for the non-existent tooth behind.
It could shed at some other time
It will shed as normal
The tooth fairy will magically transform it into a succedaneous tooth
