Severe crowding requiring orthodontic planning — ORE Part 1 MCQ

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HardOrthodonticsSevere crowding requiring orthodontic planningORE Part 1

A 14-year-old has severe upper and lower arch crowding, blocked-out upper canines, good oral hygiene and a Class I molar relationship. Cephalometric assessment shows mild bimaxillary protrusion. The patient is motivated for fixed appliances. What is the most appropriate treatment?

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Correct answer: C — Comprehensive orthodontic assessment including space analysis and extraction planning

In severe crowding with blocked-out canines and bimaxillary protrusion, comprehensive specialist orthodontic assessment is mandatory. Space analysis using cephalometrics and study models determines whether extraction is required and which teeth. Option D is inappropriate: serial extraction applies to mixed dentition, and GDPs cannot plan complex cases without specialist input or diagnostic records. Option A (veneers) masks the problem without treating the underlying malocclusion. Option E (third molar extraction) is ineffective for anterior crowding. Option B ignores a clinically significant problem in a motivated, suitable candidate. The patient requires referral to a specialist orthodontist for full diagnostic assessment before any treatment decision.

Reference: NHS England: Quick reference guide to Orthodontic assessment and treatment need; supported by Mandibular Crowding: Diagnosis and Management—A Scoping Review (PubMed 2023) and Efficiency of serial extraction and late premolar extraction cases (PubMed 2011), https://www.england.nhs.uk/south/wp-content/uploads/sites/6/2014/09/ortho-referral-quick-reference-sheet.pdf