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Ectopic Premolar Management — ORE Part 1 MCQ

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HardOrthodonticsEctopic Premolar ManagementORE Part 1

A 14-year-old has an unerupted upper left second premolar positioned buccally. Adequate orthodontic space has been created, but the tooth has not erupted during 6 months of review. Radiographs show complete root formation, an impaction depth of 4 mm and an inclination of 70 degrees. What is the most appropriate management?

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Correct answer: E — Surgically expose, bond and orthodontically align the premolar

Explanation lettering: E = shown as A · D = shown as B · B = shown as D · A = shown as E

A is correct. Adequate space has already been created, yet the premolar remains unerupted with completed roots. Its shallow depth and moderate inclination make it suitable for surgical exposure, bonding and controlled orthodontic traction. The ectopic-premolar outcome study found that spontaneous correction was confined to mild cases; surgical exposure was an active management option for less deeply impacted, moderately inclined teeth. B is therefore inappropriate after persistent failure to erupt. D is unsuitable because space is already adequate. C unnecessarily sacrifices a potentially alignable permanent tooth; extraction is reserved for a poor prognosis or an unfavourable overall treatment plan. E is not a recognised management approach for an unerupted ectopic premolar and introduces avoidable periodontal and pulpal risks.

Reference: Ismail MQ, Lauridsen E, Andreasen JO, Hermann NV. Ectopic eruption of the second premolar: an analysis of four different treatment approaches. European Archives of Paediatric Dentistry. 2020. https://pubmed.ncbi.nlm.nih.gov/31190243/