A method of manufacturing a patient-specific surgical fixture for positioning an alignment element on an acetabular socket of a pelvic bone, comprising the steps of: a) obtaining volume information of the acetabular socket of the pelvic bone from a patient, b) obtaining an installation direction of an acetabular socket implant for said patient, c) identifying and selecting parts of a bone surrounding an implant zone which are suitable for inserting an alignment element, d) identifying and selecting parts of a bone in or surrounding said implant zone which are suitable for use as a base for a contact surface or surfaces of the patient-specific surgical fixture, and e) designing and producing the patient-specific surgical fixture based on the information obtained in steps a, b, c and d, wherein the patient-specific surgical fixture comprises: a one-piece structure comprising one or more patient-specific contact elements (2, 2') which fit onto one or more areas on the acetabular socket, onto one or more areas around the acetabular socket and/or onto a rim of the acetabular socket, wherein a surface of at least one of said one or more patient-specific contact elements (2, 2') is configured to correspond to a surface of a posterior notch of a transverse ligament of the acetabular socket such that, with the surface of the at least one of said one or more patient-specific contact elements (2, 2') being fitted into and/or onto the posterior notch so as to engage with the surface of said posterior notch, the surface of the posterior notch stops a rotation of the patient-specific surgical fixture; and a positioning element rigidly attached to said one-piece structure, provided with one or more holes which allow the insertion of said alignment element. a) obtaining volume information of the acetabular socket of the pelvic bone from a patient, b) obtaining an installation direction of an acetabular socket implant for said patient, c) identifying and selecting parts of a bone surrounding an implant zone which are suitable for inserting an alignment element, d) identifying and selecting parts of a bone in or surrounding said implant zone which are suitable for use as a base for a contact surface or surfaces of the patient-specific surgical fixture, and e) designing and producing the patient-specific surgical fixture based on the information obtained in steps a, b, c and d, wherein the patient-specific surgical fixture comprises: a one-piece structure comprising one or more patient-specific contact elements (2, 2') which fit onto one or more areas on the acetabular socket, onto one or more areas around the acetabular socket and/or onto a rim of the acetabular socket, wherein a surface of at least one of said one or more patient-specific contact elements (2, 2') is configured to correspond to a surface of a posterior notch of a transverse ligament of the acetabular socket such that, with the surface of the at least one of said one or more patient-specific contact elements (2, 2') being fitted into and/or onto the posterior notch so as to engage with the surface of said posterior notch, the surface of the posterior notch stops a rotation of the patient-specific surgical fixture; and a positioning element rigidly attached to said one-piece structure, provided with one or more holes which allow the insertion of said alignment element. a one-piece structure comprising one or more patient-specific contact elements (2, 2') which fit onto one or more areas on the acetabular socket, onto one or more areas around the acetabular socket and/or onto a rim of the acetabular socket, wherein a surface of at least one of said one or more patient-specific contact elements (2, 2') is configured to correspond to a surface of a posterior notch of a transverse ligament of the acetabular socket such that, with the surface of the at least one of said one or more patient-specific contact elements (2, 2') being fitted into and/or onto the posterior notch so as to engage with the surface of said posterior notch, the surface of the posterior notch stops a rotation of the patient-specific surgical fixture; and a positioning element rigidly attached to said one-piece structure, provided with one or more holes which allow the insertion of said alignment element.