Table 2. P values of the statistical analysis of the 4 implant systems (RAF, RA, RNA, CR)^* using the non-parametric Kruskal-Wallis test.

^*cement-retained (CR), resin-air hole-full (RAF), resin-air hole (RA), and resin-no-air hole (RNA)

^**C-1: Contact 1, C-2: Contact 2

^†: value with no statistically significant difference