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Craniomaxillofacial Reconstructive and Corrective Bone Surgery - part 10

Hình 56.13a cho thấy một hàm trên bên trái lớn hơn củng cố khiếm khuyết. Hình 56.13b thể hiện vị trí của ghép xương lớn calvarial là đường viền trong một hình dạng lõm và bảo đảm kiêu ngạo inferiorly cố định vít lag. | 706 J.L. Frodel Jr. a b Figure 56.11 Right infraorbital rim defect with onlay bone graft. a Right infraorbital rim defect temporarily bridged with a miniplate. b Inset onlay bone graft technique with lag screw fixation of right infraorbital rim defect. 56. Calvarial Bone Graft Harvesting Techniques 707 Figure 56.12 Left lateral zygomaticomaxillary buttress defect. a Left lateral zygomaticomaxillary buttress defect bridged with miniplate. b Wedged bone graft with good bony contact under miniplate of left lateral zygomaticomaxillary buttress defect. 708 J.L. Frodel Jr. Case 5 Figure 56.13a shows a larger left maxillary buttress defect. Figure 56.13b demonstrates placement of a large calvarial bone graft that is contoured in a concave shape and secured superiorly and inferiorly by lag screw fixation. cerns for excessive lateral projection by placement of an overlay bone graft the residual bone adjacent to the defect is trimmed from the undersurface allowing for placement of an appropriately contoured bone graft. This is subsequently fixated by the lag screw technique. Case 6 Pictured and diagrammed Figure 56.14 is a right zygomatic arch defect after zygomatic repositioning. Because of the con- Case 7 A large calvarial defect is shown Figure 56.15 a following a traumatic injury which encompasses the entire right frontal a Figure 56.13 Large left anterolateral maxillary defect with onlay bone graft reconstruction. a Left anterolateral maxillary bone defect. b Calvarial onlay bone graft with lag screw fixation .