Orthodontics Mcqs Pdf Jun 2026

1. Which of the following is the primary biological mechanism of orthodontic tooth movement on the compression side? ❌ A) Osteoblast differentiation and bone deposition ❌ B) Increased blood flow and capillary proliferation 🏙️ ❌ D) Hyalinization and permanent cementum necrosis

But a week later, you are looking at an IOPA (X-ray) of a patient whose roots have shortened, and the PDF whispers in your ear. The abstract text becomes a clinical reality. The question about "activation of a Quad Helix" becomes the tactile sensation of adjusting a palatal expander in a 12-year-old.

Which of the following bones develops entirely through intramembranous ossification? A) Mandible B) Maxilla C) Ethmoid D) Sphenoid

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A) Mandible relative to cranial base B) Maxilla relative to cranial base C) Maxillary incisors D) Chin prominence

Start your study session right now. Open a new document, find 10 questions on "Etiology of Malocclusion," and begin your active recall journey toward orthodontic mastery.

contains specific questions on orthodontic wire features (rigidity, elasticity) and the timing of face mask therapy. ResearchGate 🛠️ Key Topics Covered in These MCQs The abstract text becomes a clinical reality

A) Pseudo Class III B) True Class III C) Skeletal open bite D) Scissor bite

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.

A) At birth B) During the first year of life C) During the mixed dentition period D) During puberty A) Mandible B) Maxilla C) Ethmoid D) Sphenoid

Open your textbook (Proffit or Rakosi). Read only the sections related to the questions you got wrong. This is "need-to-know" learning.

Explanation: The center of resistance is the point where a single force would cause pure, uniform translation of an object. For a tooth embedded in healthy alveolar bone, this point sits roughly one-third to one-half of the distance from the alveolar crest down to the root tip. This position migrates apically if the tooth suffers periodontal bone loss.

He scrolled through the pages, the questions blurring into a rhythmic dance of cephalometric landmarks and biomechanical forces. The First Hurdle: Landmarks and Angles