Table 1.

Patient characteristics

Subject	Age, y	Sex (M/F)	Prior Surgery	Symptoms at Time of 4DCT	X-ray Findings	Clinical Question	4DCT Maneuvers	Relevant Findings	Final Disposition
Volunteer	18	M	None	None	None	None	F-X S-P R-U	Normal	Normal
Patient 1	62	M	ORIF of distal radius fracture and SL ligament repair	Normal postoperative stiffness, no pain	Mild SL diastasis on supinated clenched fist view	? SL instability	F-X S-P Dart	No kinematic instability	1 year follow-up from surgery-well healed with no instability
Patient 2	50	F	ORIF distal radius fracture and SL ligament repair	Normal postoperative stiffness, no pain	Mild SL diastasis on supinated clenched fist view	? SL instability	F-X S-P Dart	No kinematic instability	4 months follow-up from surgery-well healed with no instability
Patient 3	30	M	ORIF distal radius fracture and SL ligament repair	Normal postoperative stiffness, no pain	Mild SL diastasis on supinated clenched fist view	? SL instability	F-X S-P Dart Clenched fist	No kinematic instability	6 months follow-up from surgery-well healed with no instability
Patient 4 Right Wrist	45	M	None	Diffuse wrist pain, worse with motion	Ulnar subluxation of carpus on outside X-rays	? Ulnocarpal impaction	F-X R-U Clenched fist	Dynamic ulnocarpal abutment on radial deviation and relaxed phase of clinched fist motion	Surgical fixation planned
Patient 4 Left Wrist	45	M	None	Diffuse wrist pain, worse with motion	Ulnar subluxation of carpus on outside X-rays	? Ulnocarpal impaction	F-X R-U Clenched fist	Dynamic ulnocarpal abutment on radial deviation and relaxed phase of clinched fist motion	Surgical fixation planned

Dart indicates darth throwing motion; F-X, flexion-extension; ORIF, open reduction internal fixation; R-U, radial-ulnar deviation; S-P, supination-pronation; SL, scapholunate; ?, questionable.