Fig. 3From: Differences in bone mineral density of trajectory between lumbar cortical and traditional pedicle screwsTrend of the specific value between CBT and TT (+ s.d.) of the different lumbar levels in females. Female patients experienced a notable decrease during their ages of 40 to 49, which corresponds to the age of menopause. The average specific value between CBT and TT (+ s.d.) increased with cauda lumbar levelBack to article page