Table 1 (Abstract O65).

The percentage of pin tip position at the external pelvic, within the pelvis, and the internal pelvis

	Mako			CT-navigation
Pin tip position	Pin①	Pin②	Pin③	Pin①	Pin②
External pelvis (%)	18	22	61	26	29
Within pelvis (%)	56	46	22	57	50
Internal pelvis (%)	27	29	14	17	21