Table 3.

Gerber and Nyfeller´s classifcation of dynamic shoulder instability (B).

Classification	Description
B1: Chronic Locked Dislocation	Locked instability caused by major trauma
B2: Unidirectional Instability without hyperlaxity	Symptoms elicited in a single direction Traumatic capsulolabral lesions frequently present
B3: Unidirectional instability with hyperlaxity	Symptoms elicited in a single direction Patulous capsular tissue frequently present Presence of capsulolabral lesion less likely
B4: Multidirectional Instability without hyperlaxity	Symptoms elicited in two or more directions Anterior and posterior capsulolabral lesions frequently present
B5: Multidirectional Instability with hyperlaxity	Symptoms elicited in two or more directions Patulous capsular tissue frequently present Signs of generalized hyperlaxity frequently present Frequent recurrent subluxation
B6: Uni or Multidirectional with voluntary reduction.	At first dislocation is not noticed and voluntary reduction is symptomatic. With time they learn to put the shoulder in dislocation position and reduce it.