A multi-unit abutment for alignment and attachment of a dental prosthesis to an implant with a prosthetic screw , wherein the prosthetic screw comprises a head and a threaded shaft , the multi-unit abutment comprising: an abutment base having a longitudinal axis, the abutment base comprising: a proximal end comprising a ball portion and an abutment base drive interface ; and a distal end comprising screw threads for attachment to the implant ; a swivel shell having an inner surface and an outer surface, wherein the swivel shell includes a swivel aperture proximate a distal end thereof and a threaded aperture at a proximal end thereof; and a lock screw having a longitudinal axis, wherein the lock screw comprises: a portion with external threads compatible with the threaded aperture of the swivel shell ; and a portion with internal threads sized to engage the prosthetic screw shaft ; and a lock screw drive interface being a through socket for receiving a lock screw drive tool , and wherein the lock screw drive tool has a longitudinal axis and a maximum width that is less than the maximum width of the threaded shaft of the prosthetic screw ; and a Ti base , wherein the Ti base has an aperture on the proximal end that is larger than the prosthetic screw threaded shaft and smaller than the prosthetic screw head and a distal end that is shaped to be supported by the swivel shell in a known orientation, and wherein the lock screw drive tool is sized to pass through the aperture of the Ti base without interference, wherein rotating the lock screw is capable of fixing an orientation of the longitudinal axis of the lock screw in an orientation that is not parallel to the longitudinal axis of the abutment base . an abutment base having a longitudinal axis, the abutment base comprising: a proximal end comprising a ball portion and an abutment base drive interface ; and a distal end comprising screw threads for attachment to the implant ; a proximal end comprising a ball portion and an abutment base drive interface ; and a distal end comprising screw threads for attachment to the implant ; a swivel shell having an inner surface and an outer surface, wherein the swivel shell includes a swivel aperture proximate a distal end thereof and a threaded aperture at a proximal end thereof; and a lock screw having a longitudinal axis, wherein the lock screw comprises: a portion with external threads compatible with the threaded aperture of the swivel shell ; and a portion with internal threads sized to engage the prosthetic screw shaft ; and a lock screw drive interface being a through socket for receiving a lock screw drive tool , and wherein the lock screw drive tool has a longitudinal axis and a maximum width that is less than the maximum width of the threaded shaft of the prosthetic screw ; and a portion with external threads compatible with the threaded aperture of the swivel shell ; and a portion with internal threads sized to engage the prosthetic screw shaft ; and a lock screw drive interface being a through socket for receiving a lock screw drive tool , and wherein the lock screw drive tool has a longitudinal axis and a maximum width that is less than the maximum width of the threaded shaft of the prosthetic screw ; and a Ti base , wherein the Ti base has an aperture on the proximal end that is larger than the prosthetic screw threaded shaft and smaller than the prosthetic screw head and a distal end that is shaped to be supported by the swivel shell in a known orientation, and wherein the lock screw drive tool is sized to pass through the aperture of the Ti base without interference, wherein rotating the lock screw is capable of fixing an orientation of the longitudinal axis of the lock screw in an orientation that is not parallel to the longitudinal axis of the abutment base . <EOS>