Exam Questions Flashcards
Define Cross bite?
the buccal cusps of the maxillary teeth are in contact with the central fossae of the mandibular teeth.
Define Displacemt?
- the distance between the natural contact points of adjacent teeth
Hypodontia
- Developmental absences of one or more teeth
Supernumeraries?
- those in addition to the normal series of deciduous or permanent dentition
Scissor bite?
- Maxillary posterior teeth occlude entirely on buccal aspect of mandibular posteriors.
Ankylosed tooth
- Tooth ankylosis is the fusion of cementum with the alveolar bone. It can be caused by genetic predisposition, local metabolic changes, dental trauma
Anterior open bite
- condition where there is no contact and no vertical overlap of lower incisor crowns by upper incisor crown when mand is in full occlusion.
- indices - 12% child 4% adult Afro Caribbean
Posterior open bite
A posterior open bite occurs when the back teeth, including the molars and premolars, do not touch when you bite down.
What age root formation completed ?
- Upper incisors central - 10 yrs
- lateral incisors - 11yrs
- canine - 13-15yrs
- 1st premolars- 12 -13 yrs
-2nd premolar- 12-14yrs - 1st molar - 9-10yrs
Lower central incisors-9yrs
- lateral incisors - 10years
- canine- 12-14yrs
- 1st premolar- 12-13yrs
- 2nd premolar - 13-14yrs
- 1st molar- 9-10 yrs
- 2nd molar - 14-15yrs
What age root formation completed ?
- Upper incisors central - 10 yrs
- lateral incisors - 11yrs
- canine - 13-15yrs
- 1st premolars- 12 -13 yrs
-2nd premolar- 12-14yrs - 1st molar - 9-10yrs
Lower central incisors-9yrs
- lateral incisors - 10years
- canine- 12-14yrs
- 1st premolar- 12-13yrs
- 2nd premolar - 13-14yrs
- 1st molar- 9-10 yrs
- 2nd molar - 14-15yrs
List 6 properties of stainless steel archwire which makes it popular choice of in the later stage of treatment?
- High stiffness good space closure
- Large elasticity
- Non corrosive
- Shorter range
- Poor biohost
- low friction for space closer
- join ability good, can solder hook.
Name 4 methods of active space closure
- Elinks
- powerchain
- Niti coil spring
- Bennett’s module
- power thread/ powertube
- IO elastics
What are the reason for bonding and banding 7s?
- Adding these most posterior teeth means that molar extrusion is more distal and there fore Maximises wedge effect occlusal effect.
- It limits more distal tipping and creates more efficient incisor intrusion.
- Additonal vertical posterior anchorage = less molar extrusion and more incisor intrusion.
What condition and cause enamel abnormal before and after birth?
- Amelogenesis
- MIH
- illness
PPE REMOVAL
PPE ON
- Game
- Emag
