Premature loss of upper primary first molar leads to 1) Arch collapse 2) Impacted second premolar 3) Blocked canine 4) All of the above
OrthodonticsAnswer: 3
Frankfort horizontal is reference plane constructed by joining 1) Porion and orbitale 2) Nasion and sella 3) Porion and sella 4) Porion and nasion
OrthodonticsAnswer: 1
Direction of grwoth of basal cranium 1) Upwards and backwards 2) Upwards and forwards 3) Downwards and forwards 4) Downwards and backwards
OrthodonticsAnswer: 2
The use of lip bumper to gain space is an example of 1) Reciprocal anchorage 2) Muscular anchorage 3) Simple anchorage 4) Extraoral anchorage
OrthodonticsAnswer: 2
Primary central incisor develops from 1) One lobe 2) Two lobes 3) Three lobes 4) Four lobes
OrthodonticsAnswer: 1
The amount of force required to effect the mandibular changes at condylar region is 1) 4-5 g per sq mm 2) 2-4 g per sq mm 3) 1-2 g per sq mm 4) 5-7 g per sq mm
OrthodonticsAnswer: 1
Complicated cases are most often treated by fixed appliances than removable appliance because 1) They apply heavy forces 2) Wide range of tooth movements possible 3) Require less anchorage 4) They cannot be removed by patients
OrthodonticsAnswer: 2
In Begg"s technique the width and thickness of molar band is 1) 0.18 * 0.005 inch 2) 0.125 * 0.003 inch 3) 0.15 * 0.004 inch 4) None of the above
