Orthodontics Mcqs Pdf Jun 2026

The center of resistance of a maxillary central incisor is located approximately: a) At the CEJ b) At the midpoint of the crown c) At the apical one-third of the root d) At the junction of the middle and apical one-third of the root d) At the junction of the middle and apical one-third of the root

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What is giving you the most trouble? (e.g., cephalometric calculations, wire metallurgy) The center of resistance of a maxillary central

Scammon’s curves track the growth of four primary tissue systems. Lymphoid tissues (such as tonsils and adenoids) grow rapidly during childhood, peaking at roughly 200% of adult size around age 10 to 12, before undergoing involution under the influence of rising sex hormones. Neural tissue completes about 90% of its growth by age 6. General body tissue follows an S-shaped curve, and genital tissue remains dormant until a rapid surge at puberty. Domain 2: Biomechanics and Tooth Movement General body tissue follows an S-shaped curve, and

Explanation: The Twin Block is a highly effective functional appliance used to correct skeletal Class II malocclusions caused by a retrognathic mandible in growing patients. It works by altering the postural position of the mandible downward and forward. Quad-Helix and RME are used for transverse maxillary expansion, while a Hawley appliance is a passive retainer.