An abutment system for use with a dental implant, the dental implant having an internally threaded bore, the abutment system comprising: a prosthetic portion configured to support a prosthesis thereon, the prosthetic portion having a supragingival section for protruding beyond gingiva adjacent to the dental implant and a subgingival section, the prosthetic portion having an internal bore extending therethrough, the internal bore including a tapered bore surface having an angle of α degrees relative to a vertical axis parallel with the internal bore of the prosthetic portion; a screw configured to engage threads of the internally threaded bore in the dental implant and being insertable through the internal bore in the prosthetic portion, the screw comprising a head and a shaft, the head including a tapered head surface having an angle of α degrees relative to the vertical axis parallel with the internal bore of the prosthetic portion, and the shaft including a threaded section, an outwardly tapered section leading into a recessed section, and a stop section positioned directly between the outwardly tapered section and the recessed section, the outwardly tapered section of the shaft having an increasing diameter such that the diameter along the outwardly tapered section of the shaft increases towards the head of the screw; and a washer positioned about the recessed section, the washer having an inner diameter (d i) that is less than a maximum diameter (d m) of the outwardly tapered section of the shaft, wherein the washer includes a top tapered washer surface configured to engage with the tapered head surface and a bottom tapered washer surface configured to engage with the tapered bore surface, the top and bottom tapered washer surfaces (53, 54) each having an angle of β degrees relative to the vertical axis parallel with the internal bore of the prosthetic portion, and wherein β is at least twenty percent greater than α. a prosthetic portion configured to support a prosthesis thereon, the prosthetic portion having a supragingival section for protruding beyond gingiva adjacent to the dental implant and a subgingival section, the prosthetic portion having an internal bore extending therethrough, the internal bore including a tapered bore surface having an angle of α degrees relative to a vertical axis parallel with the internal bore of the prosthetic portion; a screw configured to engage threads of the internally threaded bore in the dental implant and being insertable through the internal bore in the prosthetic portion, the screw comprising a head and a shaft, the head including a tapered head surface having an angle of α degrees relative to the vertical axis parallel with the internal bore of the prosthetic portion, and the shaft including a threaded section, an outwardly tapered section leading into a recessed section, and a stop section positioned directly between the outwardly tapered section and the recessed section, the outwardly tapered section of the shaft having an increasing diameter such that the diameter along the outwardly tapered section of the shaft increases towards the head of the screw; and a washer positioned about the recessed section, the washer having an inner diameter (d i) that is less than a maximum diameter (d m) of the outwardly tapered section of the shaft, wherein the washer includes a top tapered washer surface configured to engage with the tapered head surface and a bottom tapered washer surface configured to engage with the tapered bore surface, the top and bottom tapered washer surfaces (53, 54) each having an angle of β degrees relative to the vertical axis parallel with the internal bore of the prosthetic portion, and wherein β is at least twenty percent greater than α.