  The one-loop Minimal Supersymmetric Standard Model (MSSM) contributions to
the weak and electromagnetic dipole form factors of the top quark are
presented. Far from the Z peak, they are not sufficient to account for all the
new physics effects. In the context of the calculation of the process e^+e^- ->
t tbar to one loop in the MSSM, we compare the impact on the phenomenology of
the CP-violating dipole form factors of the top quark with the contribution
from CP-violating box graphs. Some exemplificative observables are analyzed and
the relevance of both the contributions is pointed out. The one-loop
expressions for the electromagnetic and weak dipole form factors in a general
renormalizable theory and the SM and MSSM couplings and conventions are also
given.
