1. Apertognathia means: Increased overjet Open bite Deep bite Reversed overjet 2. The Frankfort-horizontal is a reference plane constructed by joining which of the following landmarks? Nasion and sella. Porion and orbitale. Porion and nasion. Porion and sella. 3. Teeth with root fracture cannot be moved orthodontically for: 1 year 3 months 1 month 6 months 4. Progressive malocclusion is: Class I A+C Class III Class II 5. Which of these is not an absolute indication to mount orthodontic study models on articulator: Class II case with severe overjet of 14 mm To see and correct Cr-Co discrepancy To record the excursive movements of mandible Surgical planning 6. All of the following are a feature of Complex Tongue Thrust except? The occlusion of teeth may be poor. Contraction of the circumoral muscles during swallowing. This tongue thrust is characterized by teeth together swallow. The anterior open bite can be diffused or absent. 7. Which type of malocclusion should be corrected as early as possible? Class II Division 1 associated with an anterior open bite. Cross-bite associated with a functional shift of the mandible from initial contact to maximum intercuspation. Class II Division 2 associated with an increased anterior overbite. Anterior open bite associated with a lip or digit sucking habit. 8. Generalized Anterior crossbite in the primary dentition indicates: A normal maxillo-mandibular relation A dental malrelation A developing Class II malocclusion A developing Class III malocclusion 9. According to which theory, thumb sucking habit is due to deep emotional influences: Classic conditioning theory Freudian theory Palermo theory Operant conditioning theory 10. Class II malocclusion usually presents a _________________ facial profile: Orthognathic Prognathic Complex Retrognathic 11. Diagnostic aid used for measuring transverse discrepancy and vertical facial dimensions PA ceph Lateral ceph Occipitomental OPG 12. The best space maintainer to prevent the lingual collapse that often occurs following the early loss of a mandibular primary canine is a band and loop space maintainer. lingual arch. distal shoe space maintainer. Nance expansion arch. 13. The importance of proximal caries in deciduous 1st Molar for an orthodontist is: Loss of arch length RedUcticin in, arch length due to growth of mandible Class I Occlusion Flush terminal plane malocclusion 14. In a 17 year old male with a vertical growth pattern, deep anterior bite and crowding of dentition requires orthodontic treatment. In such a case, correction of deep bite while maintaining mandibular plane can be achieved by: Absolute intrusion of anteriors Relative intrusion of anteriors Relative extrusion of posteriors Absolute intrusion of posteriors 15. Which of the following materials is not used as antiflux? Graphite Boric acid Rouge Calcium carbonate in alcohol 16. Which of the following is false concerning a mixed dentition analysis? the analysis is based on a correlation of tooth size it is performed during the mixed dentition it is used to predict the amount of crowding after the permanent teeth erupt analysis is done for each quadrant 17. Hyper active mentalis activity is seen in Class II div 2 malocclusion Class II div 1 malocclusion Class I malocclusion Class III malocclusion 18. When a simple tipping force is applied to the crown of a single-rooted tooth, the centre of rotation is located within the apical half of the root. at the apex. at the cervical line. within the cervical one third of the root. 19. A single tooth anterior crossbite found in a 9 year old should have 2 arch orthodontic treatment. self-correct. be treated in the complete permanent dentition. be treated with a removable appliance. 20. The mechanism of adjustment to maintain the shape and proportions of bone throughout its growth period is called area relocation. translatory growth. remodeling. cortical drift. Loading … Question 1 of 20
