Fig. 6.
Effect of ball tip diameter on performance with the AMEI on the RW measured by the difference between the HEV functions in figure 4. Positive ΔHEV indicate that the 1.0-mm ball tip outperforms the 0.5-mm tip. Negative ΔHEV indicate the 0.5-mm tip outperforms the 1.0-mm tip. Solid lines and shading indicate the across-bone mean ΔHEV and 95% CI, respectively. The mean ΔHEV computed for the 3 frequency ranges is reported at the top of each panel. The resulting p values of the ANOVA performed on the ΔHEV are reported at the bottom. a ΔHEV between 1-mm and 0.5-mm ball tips before drilling the RW niche. b ΔHEV between 1-mm and 0.5-mm ball tips after drilling the RW niche.