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Journal of Experimental Orthopaedics
Fig. 3 | Journal of Experimental Orthopaedics

Fig. 3

From: The role of the medial plate for Pauwels type III femoral neck fracture: a comparative mechanical study using two fixations with cannulated screws

Fig. 3

a. Group 1 specimen with two parallel cannulated screws in the lower portion of the femoral neck + Pauwels screw, anterior view: (1) prior to testing, (2), after step 1, and (3) after failure in step 2. Note that there was virtually no change after step 1, but step 2 led to varus deviation and shearing of the femoral neck. Note the protrusion of the fixation screws, particularly the inferior screws; b. Group 2 specimen with two parallel cannulated screws in the lower portion of the femoral neck + Pauwels screw + medial plate, anterior view: (1) prior to testing, (2) after step 1, and (3) after failure in step 2. Mild rotational deviation occurred in four of the five specimens after step 1. In step 2, a slight diastasis was observed in the superior region of the femoral neck, but no varus deviation or shearing occurred. Note that the inferior fixation screws protruded less after testing than those in the G1 specimens

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