Research Article
Digital Anatomy to Improve Screw Insertion Techniques for Plate-Screw Fixation of the Pubic Body
Figure 5
Insertion sites of the outer screw and the screw at the line tangential to the obturator and parameter measurements. (a) Measurement of the parameters of the outer screw. The red rectangle is the screw at the maximum anterior inclination position, whereas the green rectangle is the 14-mm-long screw at the maximum posterior inclination position. The white reference line is perpendicular to the cortical tangential line of the screw insertion point. The MAIA and MPIA are the maximum anterior and posterior inclination angles, respectively. (b) and (c) are Cross-sections 1 and 2, respectively. The white reference line is perpendicular to the cortical tangential line of screw insertion point L. Because the screw at the line tangential to the obturator was fixed, the APIA (anterior/posterior inclination angle) was fixed. When recording the angle, a positive result indicated an anterior inclination angle and a negative result indicated a posterior inclination angle. Figure (c) illustrates the medial inclination angle (MIA). If the angle is less than the MIA, then the screw can penetrate through the obturator.
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