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A comparison of initial removal torque (IRT) (Ncm), postloading removal torque (PRT) (Ncm) and removal torque loss rate (TLR) (%) of different implant diameter in each group: (a) IRT of Nobel system; (b) PRT of Nobel system; (c) TLR of Nobel system; (d) IRT of Straumann system; (e) PRT of Straumann system; (f) TLR of Straumann system; (g) IRT of WEGO system; (h) PRT of WEGO system; (i) TLR of WEGO system.
