S

Scaphocapitate syndrome, 456

Scaphoid, blood supply entering, 476 dislocation of, 497-498 dorsal exposure of, 430-431 five articulations of, 476, 477 fracture of, 454, 455-456 idiopathic avascular necrosis necrosis of. See

Preiser's disease. idiopathic osteonecrosis of. See Preiser's disease.

in wrist extension and flexion, 418 in wrist extension and radial deviation, 417 ligamentous attachments of, 477, 478 osteochondritis dissecans of. See Preiser's disease.

vascular anatomy/biomechanics of, 476-477 volar exposure of, 429-430, 432

Scaphoid ischemic necrosis, 457

Scaphoid nonunion advanced collapse, 518 treatment of, 520, 521

Scapholunate, chronic injury of, 517, 518

Scapholunate advanced collapse, 517-518 stages of, 517-518 treatment of, 519-520

Scapholunate coalition, in pentadactyly, 448, 449

Scapholunate dissociation, chronic, 519, 520

Scaphotrapeziotrapezoid joint motion, 416, 417

Scaphotrapeziotrapezoid osteoarthritis, clinical and radiologic evaluation of, 522, 523 mechanisms of, 522 treatment of, 522-524

Silicone carpometacarpal implant, in thumb, 437

Silicone synovitis, 437

Synovial chondromatosis, 442-443

Synovitis, pigmented villonodular, 442

Thumb, silicone carpometacarpal implant in, 437

Trapezium, dislocation of, 499

fractures of, diagnosis of, 506-507 incidence of, 505-506 involving palmar ridge, 506 treatment of, 506-507 vertical body, 506

Trapezoid, anatomy of, 512-513 dislocation of, 498 fractures of, mechanisms of, 513 treatment of, 513

Trevor disease, 451-452

Triquetrum, dislocation of, 498

fractures of, dorsal cortical, 509-510 treatment of, 510 patterns of, 508-509

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