1. Date of download: 7/2/2016 Copyright © 2016 American Medical Association. All rights reserved. From: Facial Fracture Classification According to Skeletal Support Mechanisms Arch Otolaryngol Head Neck Surg. 1998;124(12):1306-1314. doi:10.1001/archotol.124.12.1306 Designations of fractures according to horizontal beams and vertical buttresses. Beams: superior orbital rims and glabella, H1; inferior orbital rims and zygomatic arches, H2; alveolar process of maxilla, H3; c indicates central; l, lateral. Buttresses: frontonasomaxillary, V1; frontozygomaticomaxillary, V2; pterygomaxillary, V3; s indicates superior; i, inferior. Reprinted with permission from illustrator William Loechel. Figure Legend:

2. Date of download: 7/2/2016 Copyright © 2016 American Medical Association. All rights reserved. From: Facial Fracture Classification According to Skeletal Support Mechanisms Arch Otolaryngol Head Neck Surg. 1998;124(12):1306-1314. doi:10.1001/archotol.124.12.1306 Designations of fractures in case 1. Left: V1i, V2i, H2; right: V1i, V2s, V2i, H2, H2l. See legend to Figure 1 and Table 1 for an explanation of the abbreviations. Reprinted with permission from illustrator William Loechel. Figure Legend:

3. Date of download: 7/2/2016 Copyright © 2016 American Medical Association. All rights reserved. From: Facial Fracture Classification According to Skeletal Support Mechanisms Arch Otolaryngol Head Neck Surg. 1998;124(12):1306-1314. doi:10.1001/archotol.124.12.1306 Case 1. Computed tomographic (CT) scans of a 28-year-old man who received multiple manual facial assault impacts. A, Coronal CT scan displaying fractures left V1i, H2, and right V2i. B, Coronal CT scan displaying fractures left V1i, H2, V2i, and right V1i, V2s, V2i, H2. C, Coronal CT scan displaying fractures left V1i, H2, V2i, and right V1i, V2s, V2i, H2. D, Axial CT scan displaying fracture left V2s. E, Axial CT scan displaying fracture H2l. F, Coronal CT scan displaying intact V3. See legend to Figure 1 and Table 1 for an explanation of the abbreviations. Figure Legend:

4. Date of download: 7/2/2016 Copyright © 2016 American Medical Association. All rights reserved. From: Facial Fracture Classification According to Skeletal Support Mechanisms Arch Otolaryngol Head Neck Surg. 1998;124(12):1306-1314. doi:10.1001/archotol.124.12.1306 Designation of fractures in case 2. Left: V1s, V1i, V2s, V2i, V3, H1c, H2, H2l, H3c; right: V1s, V1i, V2s, V2i, V3, H1, H1c, H2, H2l. See legend to Figure 1 and Table 1 for an explanation of the abbreviations. Reprinted with permission from illustrator William Loechel. Figure Legend:

5. Date of download: 7/2/2016 Copyright © 2016 American Medical Association. All rights reserved. From: Facial Fracture Classification According to Skeletal Support Mechanisms Arch Otolaryngol Head Neck Surg. 1998;124(12):1306-1314. doi:10.1001/archotol.124.12.1306 Case 2. Computed tomographic (CT) scans of a 23-year-old male driver who received a high-velocity facial impact from an automobile tire jettisoned from a truck traveling ahead of the patient's vehicle. A, Coronal CT scan displaying fractures left H1c and right H1, H1c. B, Coronal CT scan displaying fractures left V1s, H1c, and right V1s, H1c. C, Coronal CT scan displaying fractures left V1s, V2s, H2, and right V1s, V2s, H2. D, Coronal CT scan displaying fractures left V1i, V2i, V3, H2l, H3c, and right V1i, V2i, H2l. E, Axial CT scan displaying fractures left V1i, V2i, H2l, and right V1i, V2i, H2l. F, Axial CT scan additionally displaying fractures left V3 and right V3. G, Axial CT scan displaying fractures left V1s, V2s, and right V1s, V2s. See legend to Figure 1 andTable 1 for an explanation of the abbreviations. Figure Legend: