Maxillectomy defect classification
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The document describes two classification systems for maxillary defects. The first system by Brown et al classifies defects based on their vertical and horizontal components, with classes 1-6 describing the vertical extent and letters a-d describing the horizontal extent. The second system by Cordeiro and Santamaria is a simplified 4-part classification, with Type 1 being a limited maxillectomy not involving the palate, Type 2 being a subtotal maxillectomy preserving the orbital floor, Type 3 describing total maxillectomies with or without orbital preservation, and Type 4 being an orbitomaxillectomy while preserving the palate.
Maxillectomy defect classification
- 1. Table ClassificationofMaxillary Defectsby Brown et ala Classor Letter Defect Vertical Component Class 1 Maxillectomynotcausinganoronasal fistula 2 Not involvingthe orbit 3 Involvingthe orbital adnexae withorbital retention 4 Withorbital enucleationorexenteration 5 Orbitomaxillarydefect 6 Nasomaxillarydefect Horizontal Component Letter a Palatal defectonly,notdental alveolus b Lessthanor equal to1/2 of the bilateral ortransverse anterior c Lessthan or equal to 1/2 of the unilateral d Greaterthan 1/2 of the maxillectomy , CordeiroandSantamariadescribe asimplified4-partclassificationscheme: Type 1 Limitedmaxillectomy,palate isnotinvolved Type 2 Subtotal maxillectomy,preservationof orbital floor Type 3 a Total maxillectomywithorbital preservationbTotal maxillectomywithorbital exenteration Type 4 Orbitomaxillectomy,palateispreserved