A bone cement system according to the present disclosure includes a housing, a dispenser housing, a plunger, and a pressure release system. The housing has a proximal end, a distal end, and a throughbore that extends from the proximal end to the distal end. The dispenser housing is received in the throughbore and is adapted to receive bone cement. The plunger is releasably coupled to the proximal end of the housing and received into the dispenser housing so that movement of the plunger relative to the dispenser housing dispenses bone cement from the distal end of the housing. The pressure release system is coupled to the housing and includes a body that is movable within a plane perpendicular to a longitudinal axis of the housing, without translating the body along the longitudinal axis of the housing, to reduce the pressure of bone cement exiting the distal end of the housing.