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Table 1 AC joint configuration

From: Analysis of the bony geometry of the acromio-clavicular joint

  Type Incidence (%) Acromion angle Clavicle angle
Group I Overhanging acromion 46.2 112.7 + 7.4° 72.7 + 7.5°
Group II Neutral shaped 38.4 88.6 + 6.2° 92.9 + 13.7°
Group III Overhanging clavicle 15.4 71.3 + 7.5° 108.2 + 12.9°
  1. The corresponding angles to the different AC joint types are illustrated in this table besides their frequency distribution. Data are given as arithmetic mean and standard deviation