It is also called as Gustilo-Anderson classification. It is a well established system to establish the severity of the open fracture. e.g. if you are on night duty and you have to phone the orthopedic surgeon regarding a case, you just have to tell which type it is according to the Gustilo's classification, instead of describing the fracture in details. The classification goes as follows: Typ e I - Puncture wound < 1 cm, minimal contamination, low energy and simple fracture Type II - Laceration > 1 cm; moderate soft tissue damage with adequate bone coverage Type IIIA - Extensive soft tissue damage, often associated with high energy trauma, massive contamination but adequate bone coverage Type IIIB - Extensive soft tissue damage with periosteal stripping and bone exposure, flap coverage is usually required Type IIIC - Arterial injury associated and requiring repair