Fig. 2From: Reducing the extent of facetectomy may decrease morbidity in failed back surgery syndromeModels in the current research (ligaments have been hided for the sake of brevity in the schematic diagram of PTED). a. The complete lumbo-sacral model. b. Model1: The preoperative model. c. Model2: The model after one-quarter excision of the superior articular process. d. Model3: The model after one-half excision of the superior articular processBack to article page