Angle's Classification
A system developed by Edward H. Angle to categorise malocclusion based on the mesiodistal relationship of the first permanent molars and canines.
Full Definition
Angle's Classification, published in 1899, divides malocclusion into three primary classes. Class I malocclusion features a normal molar relationship but may include crowding, spacing, or rotations. Class II malocclusion (retrognathism) involves the mandibular first molar positioned distally relative to the maxillary first molar; it is subdivided into Division 1 (proclined upper incisors) and Division 2 (retroclined upper incisors). Class III malocclusion (prognathism) features the mandibular molar mesially positioned, often presenting with an anterior crossbite. Editors must use the possessive form 'Angle's' (with apostrophe) and Roman numerals for classes.
Usage
Usage note: Always include the possessive apostrophe: 'Angle's Classification', not 'Angles Classification'. Use Roman numerals for class designations and Arabic numerals for divisions (e.g., Class II Division 2).
In Context
- "The referral letter described the patient's Angle's Class II Division 1 malocclusion requiring orthodontic intervention." — Orthodontic referral letter
- "Check that Angle's Classification is always rendered with a possessive apostrophe and Roman numerals throughout the manuscript." — Editorial checklist