Biomechanics of posterior shoulder instability - current knowledge and literature review

Table 1 The role of computed tomography scans, magnetic resonance imaging arthrograms and diagnostic rigor

	CT arthrography	MRI arthrography
Sensitivity	82%-100%[75]	48%-89%[76,77]
Specificity	96%-100%[75]	93%[77]
Advantage Disadvantage	Identifying bony lesions, severity of fractures, assessing humeral and glenoid version[78] lower inter-examiner reliability[79]	Identifying the soft tissue from labrum to the rotator cuff[80], good for preoperative classification of labroligamentous injuries[81] Limited in elderly patients[80]
	Radiation
Pathologies	Small soft tissue lesions[82]
	Bony lesions/ fractures (Bankart fragments, Hill-Sachs Lesion)[82,83]	Avulsion of posterior periosteum[82]
	Accurate in labroligamentous, cartilaginous lesions[75]	Medial displacement of the labrum (posterior labro-scapular sleeve avulsion)[84]
		Kim lesion - incomplete and concealed superficial tear in the posterior glenoid labrum
		Glenoid rim articular divot lesion[7]
		Chondral loose bodies[85]

CT: Computed tomography scans; MRI: Magnetic resonance imaging.