Tooth Impaction Viva Questions for Exams

Q1. Define impaction.

Ans. An impacted tooth is one that fails to erupt and will not eventually assume its anatomical arch relationship beyond the chronological eruption date. It is also defined as impedance of tooth along the path of eruption.

Q2. Mention of few indications for removal of impacted tooth.

Ans.

• Pericoronitis.
• Root resorption
• Foci of infection.
• Trauma.
• Cyst/Tumor.
• Orthodontic problem.

Q3. Classify impacted mandibular 3rd molars.

Ans.

• Winters classification.
• Pell and Gregory’s classification.

Q4. Mention the details of WHARFE’s assessment.

Ans.

• Winters classification.
• Height of the mandible.
• Angulation of III molar.
• Root shape.
• Follicles.
• Path of exit.

Q5. Define war lines.

Ans.

• W- White line.
• A- Amber line.
• R- Red line.

Q6. Mention the types of flap for surgical removal of 3rd molar.

Ans.

• L- Shaped flap.
• Envelope flap.
• Bayonet – Shaped flap.

Q7. Enumerate the various techniques for surgical removal of 3rd molar.

Ans.

• Bur technique.
• Chisel vs bur technique.
• Lateral trephination technique.
• Lingual split bone technique.

Q8. Mention a few complications of surgical removal of mandibular 3rd molar.

Ans.

• Alveolar osteitis.
• Fracture of mandible.
• Hemorrhage.
• Displaced tooth during surgery.

Q9. Classify maxillary impacted tooth.

Ans.

• Mesioangular.
• Horizontal.
• Vertical.
• Distoangular.

Q10. Which is the most difficult tooth to remove surgically?

Ans.

• Horizontal
• Distoangular.

Q11. Classify canine impaction?

Ans.

Ackerman has classified into – Labial/palatal

Q12. Mention a few radiographs to be taken for maxillary and mandibular impacted tooth.

Ans.

• Intra oral periapical radiograph (IOPA)
• Occlusal radiograph.
• Orthopantamogram (OPG)
• Others.

Q13. Mention the various etiology behind impacted tooth.

Ans.

1. Chronology.
2. Lack of space.
3. Obstruction.
4. Dilaceration.
5. Non eruption.

Q14. Describe the necessity of radiological assessment of impacted tooth.

Ans. 

1. Assess the type of impacted tooth.
2. Surgical access.
3. To undermine the existing pathology.
4. Position and depth of impacted tooth.
5. Bone texture.
6. Relationship with inferior alveolar dental canal.