gartland & werley classification gartland & werley classification gartland & werley classification is a system of categorizing colles' fractures. in the gartland & werley classification system there are three types of fractures. the classification system is based on metaphysical comminution, intra-articular extension and displacement, and was first published in 1951. classification type 1: extra-articular, displaced type 2: intra-articular, no displacement type 3: intra-articular, displaced