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Quizzes > Quizzes for Business > Healthcare

Orthodontic and Oral Surgery Decision-Making Quiz

Test Your Clinical Judgment in Treatment Planning

Difficulty: Moderate
Questions: 20
Learning OutcomesStudy Material
Colorful paper art illustrating orthodontic and oral surgery decision-making quiz.

Are you ready to challenge your treatment planning expertise? This comprehensive orthodontic and oral surgery decision-making quiz is designed for dental students and practitioners seeking to refine clinical judgment. Learners can explore best practices and evaluate scenarios with our engaging Interactive Decision-Making Quiz or deepen oral care insights with the Oral Health Knowledge Assessment Quiz. All questions are fully editable, so you can tailor the experience in our quizzes editor for personalized practice.

Which type of dental malocclusion is typically managed with orthodontic treatment alone?
Mild Class I crowding
Vertical open bite >5 mm
Severe Class III prognathism
Mandibular prognathism
Mild Class I crowding involves primarily dental alignment and does not require skeletal correction. Severe skeletal discrepancies like Class III prognathism generally need surgical intervention.
What imaging modality provides the most comprehensive three-dimensional evaluation for surgical planning?
Panoramic radiograph
Magnetic resonance imaging
Cone-beam computed tomography
Periapical radiograph
Cone-beam CT offers detailed 3D visualization of skeletal and dental structures critical for surgical planning. Panoramic and periapical films are 2D and lack full spatial information.
Rapid palatal expansion is primarily indicated for which condition?
Sagittal Class II discrepancy
Transverse maxillary deficiency
Generalized spacing in the mandibular arch
Anterior open bite due to growth
Rapid palatal expansion corrects transverse deficiency by widening the maxillary arch. It does not address sagittal or vertical skeletal problems directly.
Which functional appliance is commonly used to advance the mandible in Class II correction?
Lingual arch
Twin block appliance
Nance holding arch
Quad helix
The twin block is designed to posture the mandible forward, stimulating growth and correcting Class II relationships. Quad helix and holding arches do not advance mandibular position.
What is the primary goal of presurgical orthodontics in orthognathic cases?
Removal of all appliances
Post-surgical stabilization
Immediate aesthetic alignment
Dental decompensation
Presurgical orthodontics aims to decompensate dental inclinations so that the jaws can be repositioned accurately. Aesthetic or stabilization goals come later in treatment.
A 25-year-old presents with skeletal Class III malocclusion and mandibular prognathism. The most appropriate treatment is:
Orthognathic surgery with mandibular setback
Cervical headgear therapy
Rapid palatal expansion
Orthodontic camouflage only
Severe skeletal Class III due to mandibular prognathism requires surgical setback for skeletal correction. Orthodontic camouflage alone cannot fully correct the underlying skeletal issue.
An impacted maxillary canine is located palatally near the lateral incisor root. The best management is:
Segmental Le Fort I osteotomy
Surgical exposure and orthodontic traction
Extraction and implant placement
Observation for spontaneous eruption
Surgical exposure plus orthodontic traction aligns the impacted canine into the arch. Extraction sacrifices a permanent tooth, and segmental osteotomy is not indicated for a single impacted canine.
Which procedure carries the highest risk of inferior alveolar nerve injury?
Genioplasty
Bilateral sagittal split osteotomy
Le Fort I osteotomy
Alveoloplasty
Bilateral sagittal split osteotomy directly involves the mandibular ramus where the inferior alveolar nerve runs. Le Fort I and genioplasty are away from that nerve canal.
Which factor most strongly predicts postoperative relapse after mandibular advancement?
Magnitude of advancement
Anesthetic technique
Patient gender
Type of rigid fixation
Greater amounts of mandibular advancement are associated with higher relapse risk due to soft-tissue tension and muscle pull. Demographic or anesthetic factors have minimal impact.
What is the correct sequence in combined orthodontic-orthognathic treatment?
Presurgical orthodontics, surgery, postsurgical orthodontics
Postsurgical orthodontics, surgery, presurgical orthodontics
Extractions, surgery, without braces
Surgery, presurgical orthodontics, postsurgical orthodontics
First decompensate teeth with presurgical orthodontics, then perform surgery to correct jaws, and finish with postsurgical orthodontics for detailing.
In an anterior open bite patient with tongue”thrust habit, a likely complication after surgery is:
Mandibular nerve paresthesia
Relapse from persistent tongue thrust
Plate fracture
Excessive bleeding
Habitual tongue thrust can reopen the bite postoperatively, leading to relapse. Nerve issues or hardware failure are less directly related to tongue habits.
Segmental osteotomy of the maxilla is indicated for:
Transverse maxillary discrepancy in adults
Class II correction in growing patients
Rapid expansion in children
Mandibular setback
Segmental Le Fort I osteotomy allows true transverse expansion in skeletally mature patients. Younger patients can often be treated with nonsurgical expansion.
A 30-year-old with a gummy smile from vertical maxillary excess should be treated with:
Le Fort I impaction
Botulinum toxin injections
Mandibular setback alone
Lip repositioning surgery
Le Fort I impaction corrects the skeletal vertical excess, reducing gingival display. Soft-tissue procedures alone are insufficient for true skeletal issues.
What does "ideal root parallelism" refer to in orthodontic finishing?
Crown tips touching evenly
Roots aligned parallel within the alveolar bone
Third molars in correct angulation
Condylar heads seated symmetrically
Ideal root parallelism means the root apices of adjacent teeth run parallel in the bone, which promotes periodontal health and stability.
Compared to 2D imaging, CBCT provides the added benefit of:
Three-dimensional airway volume evaluation
Higher soft tissue contrast
Lower equipment cost
Reduced radiation dose
CBCT allows volumetric assessment of airways, sinuses, and bone structures in 3D, which conventional radiographs cannot provide.
In presurgical decompensation for a Class III case, which movement is contraindicated?
Leveling of both arches
Proclining upper incisors
Retroclining lower incisors to camouflage
Derotation of molars
Retroclining lower incisors masks the skeletal discrepancy but impedes proper surgical occlusal setup. True decompensation involves removing dental compensations toward normal inclinations.
The greatest risk factor for neurosensory disturbance after BSSO is:
Close proximity of the inferior alveolar nerve to the lateral cortex
Patient age over 30
Type of general anesthesia
Use of monocortical screws
When the nerve lies near the buccal cortex, splitting the mandible risks nerve trauma. Fixation hardware or patient demographics are less predictive.
For a patient with midface deficiency and mandibular prognathism, the ideal surgical plan is:
Le Fort I maxillary advancement plus BSSO mandibular setback
Maxillary distraction only
Segmental osteotomy of the mandible only
Orthodontic camouflage only
Dual”jaw surgery (Le Fort I advancement and sagittal split setback) addresses both midface deficiency and mandibular prognathism for balanced facial harmony.
Which approach most effectively minimizes relapse after orthognathic surgery?
Rigid internal fixation with early mobilization
No retention to allow natural settling
Immediate application of heavy elastic forces
Prolonged maxillomandibular fixation
Rigid fixation stabilizes bone segments and early function stimulates bone healing. Prolonged fixation or heavy elastics can cause stiffness or unwanted movements.
Evidence shows that stability after surgically assisted rapid palatal expansion is most dependent on:
Patient age under 20
Retention period of at least three months
Magnitude of surgical downfracture
Type of expansion appliance used
A retention phase of about three months allows bone fill in the expanded suture, ensuring long-term stability. Age and appliance type are less critical once the suture is surgically opened.
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Learning Outcomes

  1. Evaluate diverse orthodontic and surgical treatment options.
  2. Identify key indications for orthodontic versus oral surgery.
  3. Apply evidence-based criteria to case scenarios.
  4. Demonstrate clinical reasoning in treatment planning.
  5. Analyse potential complications and manage risks effectively.

Cheat Sheet

  1. Teamwork Makes the Dream Work - Orthodontists and surgeons join forces like a dynamic duo to reshape jaws and smiles. By collaborating closely on every bracket placement and bone adjustment, they ensure harmony between function and aesthetics. Learn more
    2. Source: PMC
  2. Mastering Diagnostic Records - Comprehensive records, including cephalometric analyses and hands-on clinical evaluations, are your roadmap to spotting subtle jaw misalignments. These tools help you measure angles, distances, and proportions to craft a precise treatment plan. Learn more
    3. Source: PubMed
  3. Presurgical Orthodontic Prep - Decompensating dental compensations means reversing crooked compensations so surgery can hit the bull's-eye. This step sets teeth in the perfect launchpad position, paving the way for seamless jaw adjustments. Learn more
    4. Source: PubMed
  4. Cephalometric Prediction Planning - Think of this as your crystal ball for surgical outcomes - using computer simulations and ceph tracings to foresee changes. By plotting anticipated movements, you sharpen your game plan and boost confidence in results. Learn more
    5. Source: Wiley
  5. Facial Proportions & Symmetry - A balanced face is like a perfectly mixed paint palette - each ratio matters. Understanding golden proportions helps you sculpt aesthetic harmony between upper, middle, and lower facial thirds. Learn more
    6. Source: Pocket Dentistry
  6. Systematic Diagnosis & Planning - Integrate both orthodontic and surgical perspectives in a step-by-step workflow to dodge treatment dead ends. A systematic checklist ensures nothing slips through the cracks, from X-rays to bracket torque. Learn more
    7. Source: PubMed
  7. Complications & Risk Management - Every surgery has its "what-if" moments; knowing possible complications like nerve injury or relapse equips you to prevent them. Proactive strategies, clear consent, and solid follow-up create a safety net for patient peace of mind. Learn more
    8. Source: PubMed
  8. Postsurgical Orthodontic Finishing - After the bones settle, fine-tuning tooth positions brings the smile home. Detailed adjustments secure ideal occlusion and help maintain long-term stability for years of confident grins. Learn more
    9. Source: PubMed
  9. The "Surgery First" Revolution - Jump straight into jaw correction before braces to unlock instant improvements in function and looks. This approach can shorten overall treatment time and boost patient motivation right from day one. Learn more
    10. Source: PMC
  10. Patient-Centered Care - Tailor treatments to each person's unique needs, lifestyle and smile dreams for truly personalized outcomes. Involving patients in every decision empowers them and builds trust along the orthognathic journey. Learn more
    11. Source: PubMed
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