At birth, the palate is relatively flat; in adults; it is vault-shaped. By which of the following does this change occur 1) Resorption in the vault 2) Growth of alveolar bone 3) Appposition at tuberosity region 4) Growth of maxillary sinus
OrthodonticsAnswer: 2
Supernumerary teeth in anterior region found commonly 1) Palatal and in between upper central incisors 2) Distal to upper central incisors at root level 3) Distal to lateral incisors at root level 4) None of the above
OrthodonticsAnswer: 1
Teeth that are initiated after birth 1) Premolars, permanent second and third molars 2) Premolars and permanent molars 3) All permanent teeth 4) Only permanent molars
OrthodonticsAnswer: 1
Expansion screws used in treatment of crossbites produce 1) 1 mm expansion per quanter turn 2) 0.20 mm expansion/quarter turn, which is equal to width of PDL ligament 3) 1 mm expansion per half turn, which is equal to width of PDL ligament 4) 1 mm expansion per quarter turn, which is equal to width of PDL ligament
OrthodonticsAnswer: 2
Incompetent lips may be seen in 1) Increased anterior face height 2) Flaccid lips 3) Enlarged adenoids 4) Matured swallow
The cause of pseudo class III malocclusion is 1) Development deficiency 2) Increased mandibular growth 3) Functional abnormality 4) Hormonal disturbance
OrthodonticsAnswer: 3
Which of the following components of the fixed appliance holds the arch wire on the teeth except for that of anchor molars 1) Cleats 2) Brackets 3) Bands 4) Lock springs
