Which of the following is related to reciprocal anchorage in orthodontic mechanotherapy 1) Tipping of a tooth 2) Extraoral force 3) Bodily movement of a tooth 4) Equal and opposite forces
OrthodonticsAnswer: 4
Down"s cephalometric analysis uses.................line as a reference plane 1) ANS-PNS 2) SN plane 3) Porion-Orbitale 4) Gonion-Menton
OrthodonticsAnswer: 4
A boy aged 14 years attends with a class I malocclusion. Moderate crowding in upper and lower anterior segment, primary upper canines retained. Radiographs show erupting permanent upper canines. Treatment is 1) Wait until upper primary canines shed naturally 2) Extract upper primary canines only and wait until permanent canine erupt 3) Extract upper "C" & "4"s & lower "4"s & maintain space for eruption of upper permanent canines 4) None of the above
OrthodonticsAnswer: 3
Which of the following is basically not a vestibular appliance 1) Oral screen 2) Activator 3) Lip bumper 4) Frankel appliance
OrthodonticsAnswer: 2
Loops and helices are included in arch wires primarily to 1) Align crowded teeth 2) Increase force of wires 3) Increase the anchorage 4) Increase the activation range
OrthodonticsAnswer: 4
Which of the following are typical and acceptable preventive and therapeutic measures for dealing wih these periodontal problems during fixed appliance therapy? 1) Elimination of gingivitis prior to placing orthodontic appliance 2) Megavitamin therapy 3) Scaling and curettage immediately after appliance removal 4) None of the above
OrthodonticsAnswer: 1
On a cephalogram if FMA angle is 25 degrees the patient is 1) Long face 2) Short face 3) Average face 4) Mandibular growth is rotated backwards
OrthodonticsAnswer: 3
Gennifer at 4 years got her lower 2nd molar extracted due to caries, the possible line of treatment is 1) Distal shoe space maintainer 2) Band and loop between primary 1st molar and permanent 1st molar 3) Removable partial denture 4) No active treatment is necessary
