Insufficient lateral stem contact is an influencing factor for significant subsidence in cementless short stem total hip arthroplasty

Figure 1 Photograph shows the Metha short stem.

Figure 2 Radiograph images. A: The 1^st post-operative day; B: 2-year follow-up anteroposterior; C: Lateral radiographs. Neck-filling ratio is distance from c to d divided by a to b. Seating height is distance from e to f. Lateral stem contact is distance between line g and h.

Figure 3 Starting step with curved awl and rasping in the same direction. A: Pictures show the starting step with curved awl, which it must be in contact with the lateral cortex; B: Then rasping in the same direction.