Exam Questions

Question 1

Define Cross bite?

Answer 1

the buccal cusps of the maxillary teeth are in contact with the central fossae of the mandibular teeth.

Question 2

Define Displacemt?

Answer 2

• the distance between the natural contact points of adjacent teeth

Question 3

Hypodontia

Answer 3

• Developmental absences of one or more teeth

Question 4

Supernumeraries?

Answer 4

• those in addition to the normal series of deciduous or permanent dentition

Question 5

Scissor bite?

Answer 5

• Maxillary posterior teeth occlude entirely on buccal aspect of mandibular posteriors.

Question 6

Ankylosed tooth

Answer 6

• Tooth ankylosis is the fusion of cementum with the alveolar bone. It can be caused by genetic predisposition, local metabolic changes, dental trauma

Question 7

Anterior open bite

Answer 7

• 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

Question 8

Posterior open bite

Answer 8

A posterior open bite occurs when the back teeth, including the molars and premolars, do not touch when you bite down.

Question 9

What age root formation completed ?

Answer 9

• 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

Question 10

What age root formation completed ?

Answer 10

• 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

Question 11

List 6 properties of stainless steel archwire which makes it popular choice of in the later stage of treatment?

Answer 11

• High stiffness good space closure
• Large elasticity
• Non corrosive
• Shorter range
• Poor biohost
• low friction for space closer
• join ability good, can solder hook.

Question 12

Name 4 methods of active space closure

Answer 12

• Elinks
• powerchain
• Niti coil spring
• Bennett’s module
• power thread/ powertube
• IO elastics

Question 13

What are the reason for bonding and banding 7s?

Answer 13

• 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.

Question 14

What condition and cause enamel abnormal before and after birth?

Answer 14

• Amelogenesis
• MIH
• illness

Question 15

PPE REMOVAL
PPE ON

Answer 15

• Game
• Emag

Question 16

What cause MIH?

Answer 16

• Do not know
• disturbance in tooth development at time of birth.
  -illness during pregnancy may cause it

Question 17

Which appliance we use for sleep apnea?

Answer 17

• Somnowell appliance - mandibular advancement appliance.
• CPAP - Continues positive airway pressure