Table 1.

Classifications of fracture clavicle.

Allman	Nordqvist & Petersson	Craig	Edinburgh (Robinson)			Neer
Group 1: mid third	Undisplaced Displaced comminuted	Type 1 : mid third	Medial third (type 1)	Non displaced (1A)	1A1 – Extra-articular 1A2 – Intra-articular	Type 1: fracture lateral to the coracoclavicular ligament attachment, which has very minimal displacement
				Displaced (1B)	1B1 – Extra-articular 1B2 – Intra-articular	Type 2: medial to the ligament attachment 2A – both the conoid and the trapezoid ligaments are attached to the distal fragment 2B – conoid is detached from the proximal fragment while the trapezoid is attached to the distal fragment
			Middle third (type 2)	Cortical alignment fractures (2A)	2A1 – Undisplaced 2A2 – Angulated	Type 3: with intra-articular extension
Group 2: lateral third	Undisplaced Displaced	Type 2: Distal 1/3 fractures a.Minimally displaced b. Displaced fractures, fracture medial to the C–C ligament 1. Conoid and trapezoid intact 2. Conoid torn, trapezoid intact c.Fractures into articular surface d.Fractures in children, intact C–C ligaments attached to periosteal sleeve, proximal fragment displaced e.Comminuted fractures		Displaced fractures (2B)	2B1 – Simple or wedge comminuted 2B2 – Isolated or comminuted segmental	Type 4: occurs in children where a periosteal sleeve gets avulsed from the inferior cortex with the attached coracoclavicular ligament and the medial fragment gets displaced upwards
						Type 5: avulsion fracture leaving behind an inferior cortical fragment attached to the coracoclavicular ligament
Group 3: medial third	Undisplaced Displaced	Type 3: Proximal 1/3 fractures a.Minimally displaced b.Displaced c.Intra-articular d.Epiphyseal separation e.Comminuted	Distal third (type 3)	Cortical alignment fractures (3A)	3A1 – Extra-articular 3A2 – Intra-articular
				Displaced fractures (3B)	3B1 – Extra-articular 3B2 – Intra-articular