Good day Alex.fracture can be said to be simple when a bone is fractured with little or no injury to the surrounding soft tissues and absence of obvious physical deformity.Complex fracture is characterised with communication fo the #ed segments to the skin surface with serious injury to the surrounding soft tissue(muscles,lig,major bld vessels + or - neural supply).and obvious physical deformity.Not satisfy u can consult Bailly and love books or google it at ur convinence.Merry Xmas. Yelufem BMR(PT).